Organic electroluminescent element and electronic device

Abstract

This application relates to organic electroluminescent elements and electronic devices. An organic electroluminescent element (1) is provided, wherein a light-emitting region (5) disposed between an anode (3) and a cathode (4) comprises a first light-emitting layer (51) and a second light-emitting layer (52). The first light-emitting layer (51) contains a first host material and a first dopant material, and the second light-emitting layer (52) contains a second host material and a second dopant material. The first dopant material is a compound selected from the group of polycyclic aromatic compounds represented by formula (DX), and the first host material is a compound represented by formula (H1-1) or formula (H1-2). The first host material and the second host material are different from each other, and the first dopant material and the second dopant material are the same as or different from each other.

Description

Technical Field

[0001] This invention relates to organic electroluminescent elements and electronic devices. Background Technology

[0002] Organic electroluminescent devices (hereinafter sometimes referred to as "organic EL devices") are used in full-color displays for mobile phones, televisions, and other applications. When a voltage is applied to an organic EL device, holes are injected from the anode into the light-emitting layer, and electrons are injected from the cathode into the light-emitting layer. Then, in the light-emitting layer, the injected holes recombine with the electrons to form excitons. At this point, according to the statistical law of electron spin, singlet excitons are generated at a rate of 25%, and triplet excitons are generated at a rate of 75%.

[0003] To improve the performance of organic EL devices, various studies have been conducted on compounds used in organic EL devices, such as in Document 1 (International Publication No. 2021 / 210582) and Document 2 (US Patent Application Publication No. 2024 / 0244969). Examples of the performance characteristics of organic EL devices include, for example, brightness, emission wavelength, chromaticity, luminous efficiency, driving voltage, and lifetime. Summary of the Invention

[0004] The purpose of this invention is to provide an organic electroluminescent element that emits light with high luminous efficiency and long lifespan, and to provide an electronic device equipped with the organic electroluminescent element.

[0005] According to one aspect of the present invention, an organic electroluminescent element is provided, which has an anode, a cathode, and a light-emitting region disposed between the anode and the cathode.

[0006] The anode, the light-emitting area, and the cathode are arranged in sequence.

[0007] The aforementioned light-emitting region includes a first light-emitting layer and a second light-emitting layer.

[0008] The aforementioned first light-emitting layer contains a first host material and a first dopant material.

[0009] The aforementioned second light-emitting layer contains a second host material and a second dopant material.

[0010] The first dopant material mentioned above is a compound selected from the group of polycyclic aromatic compounds represented by the following formula (DX).

[0011] The aforementioned first main material is a compound represented by either formula (H1-1) or formula (H1-2).

[0012] The first main material mentioned above is different from the second main material mentioned above.

[0013] The first dopant material mentioned above may be the same as or different from the second dopant material mentioned above.

[0014]

[0015] (In the above formula (DX),

[0016] Rings a, b, and c are each independently...

[0017] Substituted or unsubstituted aromatic hydrocarbon rings with 6 to 50 carbon atoms, or

[0018] Heterocycles with 5 to 50 cyclic atoms, substituted or unsubstituted.

[0019] Y 1 Boron atoms, phosphorus atoms, P=O, P=S, aluminum atoms, gallium atoms, arsenic atoms, Si-R 40 Or Ge-R 42 ,

[0020] R 40 and R 42 Each independently

[0021] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0022] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0023] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[0024] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[0025] X 1 and X 2 Each independently consists of an oxygen atom and NR. 41 sulfur atoms or selenium atoms

[0026] R 41

[0027] Bonded to ring a, ring b, or ring c to form substituted or unsubstituted monocyclic rings.

[0028] Bonded to ring a, ring b, or ring c to form substituted or unsubstituted fused rings, or

[0029] It does not bond with the aforementioned rings a, b, and c.

[0030] R does not form the aforementioned substituted or unsubstituted monocyclic rings and does not form the aforementioned substituted or unsubstituted fused rings. 41 for

[0031] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0032] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[0033] Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms

[0034] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0035] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[0036] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[0037] Multiple R 41 (They may be the same or different.)

[0038]

[0039] (In the above formula (H1-1),

[0040] R 150 ~R 159 Each independently

[0041] hydrogen atom,

[0042] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0043] Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms

[0044] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[0045] Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms

[0046] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0047] -Si(R 901 (R) 902 (R) 903 The groups shown in the figure,

[0048] -O-(R 904 The groups shown in the figure,

[0049] -S-(R 905 The groups shown in the figure,

[0050] Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms

[0051] -C(=O)R 801 The groups shown

[0052] -COOR 802 The groups shown

[0053] Halogen atoms,

[0054] cyano,

[0055] Nitro,

[0056] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms

[0057] Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms, or

[0058] The group represented by the above formula (H150),

[0059] Among them, R 150 ~R 159 At least one of them is a group represented by the above formula (H150).

[0060] When multiple groups represented by the above formula (H150) are present, the multiple groups represented by the above formula (H150) may be the same as or different from each other.

[0061] L 151 for

[0062] Substituted or unsubstituted arylene groups with 6 to 50 carbon atoms, or

[0063] Divalent heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[0064] Ar 151 for

[0065] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[0066] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[0067] mg is 0, 1, 2, 3, 4 or 5,

[0068] When mg is 0, -(L 151 )0- indicates a single bond,

[0069] In L 151 When there are more than two, more than two L 151 They are the same or different.

[0070] In Ar 151 When there are more than two, more than two Ar 151 They are the same or different.

[0071] In the above formula (H150), * indicates the bonding location.

[0072]

[0073] (In the above formula (H1-2),

[0074] R 131 ~R 140 Ar 131 and Ar 132 Each independently

[0075] hydrogen atom,

[0076] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0077] Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms

[0078] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[0079] Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms

[0080] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0081] -Si(R 901 (R) 902 (R) 903 The groups shown in the figure,

[0082] -O-(R 904 The groups shown in the figure,

[0083] -S-(R 905 The groups shown in the figure,

[0084] Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms

[0085] -C(=O)R 801 The groups shown

[0086] -COOR 802 The groups shown

[0087] Halogen atoms,

[0088] cyano,

[0089] Nitro,

[0090] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms

[0091] Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms, or

[0092] The group represented by the above formula (H131),

[0093] Among them, R 131 ~R 140 Ar 131 and Ar 132At least one of them is a group represented by the above formula (H131),

[0094] When multiple groups represented by the above formula (H131) are present, the multiple groups represented by the above formula (H131) may be the same as or different from each other.

[0095] L 13 for

[0096] Substituted or unsubstituted arylene groups with 6 to 50 carbon atoms, or

[0097] Divalent heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[0098] Ar 13 for

[0099] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[0100] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[0101] mb can be 0, 1, 2, 3, 4, or 5.

[0102] When mb is 0, -(L 13 )0- indicates a single bond,

[0103] In L 13 When there are more than two, more than two L 13 They are the same or different.

[0104] In Ar 13 When there are more than two, more than two Ar 13 They are the same or different.

[0105] In the above formula (H131), * indicates the bonding location.

[0106] (In the aforementioned first main material, R) 901 ~R 905 R 801 and R 802 Each independently

[0107] hydrogen atom,

[0108] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0109] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0110] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[0111] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[0112] In R 901 When multiple R exist, multiple R 901 They are the same or different.

[0113] In R 902 When multiple R exist, multiple R 902 They are the same or different.

[0114] In R 903 When multiple R exist, multiple R 903 They are the same or different.

[0115] In R 904 When multiple R exist, multiple R 904 They are the same or different.

[0116] In R 905 When multiple R exist, multiple R 905 They are the same or different.

[0117] In R 801 When multiple R exist, multiple R 801 They are the same or different.

[0118] In R 802 When multiple R exist, multiple R 802 (They may be the same or different.)

[0119] According to one aspect of the present invention, an electronic device incorporating the organic electroluminescent element described above is provided.

[0120] According to one aspect of the present invention, an organic electroluminescent element that emits light with high luminous efficiency and long lifetime can be provided, and an electronic device equipped with the organic electroluminescent element can also be provided. Attached Figure Description

[0121] Figure 1 This is a diagram showing the general configuration of a first example of an organic EL element according to the first embodiment.

[0122] Figure 2 This is a diagram showing the general configuration of a second example of the organic EL element according to the first embodiment. Detailed Implementation

[0123] [definition]

[0124] In this specification, a hydrogen atom means an isotope containing different numbers of neutrons, namely protium, deuterium, and tritium.

[0125] In this specification, the chemical structural formula does not explicitly show that the bonding positions of symbols such as "R" and "D" representing deuterium atoms are set to be bonded to hydrogen atoms, i.e., protium atoms, deuterium atoms, or tritium atoms.

[0126] In this specification, the number of carbon atoms forming a ring refers to the number of carbon atoms in the ring itself of a compound whose atoms are bonded in a ring (e.g., monocyclic compounds, fused-ring compounds, bridged-ring compounds, carbocyclic compounds, and heterocyclic compounds). When the ring is substituted with a substituent, the carbon atoms contained in the substituent are not included in the number of carbon atoms forming the ring. The term "number of carbon atoms forming a ring" is used as such unless otherwise specified. For example, the number of carbon atoms forming a ring is 6 for a benzene ring, 10 for a naphthalene ring, 5 for a pyridine ring, and 4 for a furan ring. Additionally, for example, the number of carbon atoms forming a ring is 13 for 9,9-diphenylfluorene and 25 for 9,9'-spirobifluorene.

[0127] Furthermore, when a benzene ring is substituted with an alkyl group, the carbon number of the alkyl group is not included in the number of carbon atoms in the ring-forming process of the benzene ring. Therefore, the number of carbon atoms in the cyclic benzene ring substituted with an alkyl group is 6. Similarly, when a naphthalene ring is substituted with an alkyl group, the carbon number of the alkyl group is not included in the number of carbon atoms in the ring-forming process of the naphthalene ring. Therefore, the number of carbon atoms in the cyclic naphthalene ring substituted with an alkyl group is 10.

[0128] In this specification, the number of cyclic atoms refers to the number of atoms constituting the ring itself in compounds with a cyclic structure (e.g., monocyclic, fused-ring, and ring assemblies). Atoms that do not constitute the ring (e.g., hydrogen atoms ending the bonds of the ring-forming atoms) and atoms contained in substituents when the ring is substituted are not included in the number of cyclic atoms. The term "number of cyclic atoms" as used below is the same unless otherwise stated. For example, the number of cyclic atoms in a pyridine ring is 6, in a quinazoline ring it is 10, and in a furan ring it is 5. For example, the number of hydrogen atoms bonded to the pyridine ring or atoms constituting substituents are not included in the number of cyclic atoms in pyridine. Therefore, the number of cyclic atoms in a pyridine ring bonded with hydrogen atoms or substituents is 6. Furthermore, hydrogen atoms bonded to the carbon atoms of the quinazoline ring, or atoms constituting substituents, are not included in the number of cyclic atoms of the quinazoline ring. Therefore, the number of cyclic atoms in a quinazoline ring with bonded hydrogen atoms or substituents is 10.

[0129] In this specification, the phrase "ZZ group with substituted or unsubstituted carbon numbers of XX to YY" indicates the number of carbons when the ZZ group is unsubstituted; the number of carbons in substituents is not included. Here, "YY" is greater than "XX," where "XX" refers to an integer greater than 1, and "YY" refers to an integer greater than 2.

[0130] In this specification, the phrase "ZZ group with substituted or unsubstituted atoms of XX to YY" refers to the number of atoms when the ZZ group is unsubstituted, excluding the number of atoms of substituents when substitution has occurred. Here, "YY" is greater than "XX", where "XX" is an integer greater than or equal to 1, and "YY" is an integer greater than or equal to 2.

[0131] In this specification, "unsubstituted ZZ group" means "substituted or unsubstituted ZZ group" and "substituted ZZ group" means "substituted ZZ group".

[0132] In this specification, "unsubstituted" when referred to as "substituted or unsubstituted ZZ group" means that the hydrogen atom in the ZZ group has not been substituted with a substituent. The hydrogen atom in the "unsubstituted ZZ group" is a protium atom, a deuterium atom, or a tritium atom.

[0133] Furthermore, in this specification, "substitution" when expressed as "substituted or unsubstituted ZZ group" means that one or more hydrogen atoms in the ZZ group have been replaced by a substituent. Similarly, "substitution" when expressed as "BB group substituted by AA group" also means that one or more hydrogen atoms in the BB group have been replaced by an AA group.

[0134] Substituents described in this specification

[0135] The substituents described in this specification are explained below.

[0136] Unless otherwise stated in this specification, the number of carbon atoms in the cyclic formation of the "unsubstituted aryl group" is 6 to 50, preferably 6 to 30, and more preferably 6 to 18.

[0137] Unless otherwise stated in this specification, the number of cyclic atoms in the "unsubstituted heterocyclic group" is 5 to 50, preferably 5 to 30, and more preferably 5 to 18.

[0138] Unless otherwise stated in this specification, the number of carbon atoms in the "unsubstituted alkyl" is 1 to 50, preferably 1 to 20, and more preferably 1 to 6.

[0139] Unless otherwise stated in this specification, the number of carbon atoms in the "unsubstituted alkenyl group" is 2 to 50, preferably 2 to 20, and more preferably 2 to 6.

[0140] Unless otherwise stated in this specification, the number of carbon atoms in the "unsubstituted alkynyl group" is 2 to 50, preferably 2 to 20, and more preferably 2 to 6.

[0141] Unless otherwise stated in this specification, the number of carbon atoms in the cyclic formation of the "unsubstituted cycloalkyl group" is 3 to 50, preferably 3 to 20, and more preferably 3 to 6.

[0142] Unless otherwise stated in this specification, the number of carbon atoms in the cyclic formation of the "unsubstituted aryl group" is 6 to 50, preferably 6 to 30, and more preferably 6 to 18.

[0143] Unless otherwise stated in this specification, the number of cyclic atoms in the "unsubstituted divalent heterocyclic group" is 5 to 50, preferably 5 to 30, and more preferably 5 to 18.

[0144] Unless otherwise stated in this specification, the number of carbon atoms in the "unsubstituted alkylene group" is 1 to 50, preferably 1 to 20, and more preferably 1 to 6.

[0145] • "Substituted or unsubstituted aryl groups"

[0146] Specific examples of "substituted or unsubstituted aryl" as described in this specification (specific example group G1) include unsubstituted aryl (specific example group G1A) and substituted aryl (specific example group G1B), etc. (Here, unsubstituted aryl refers to the case where "substituted or unsubstituted aryl" is "unsubstituted aryl", and substituted aryl refers to the case where "substituted or unsubstituted aryl" is "substituted aryl".) In this specification, when referred to only as "aryl", both "unsubstituted aryl" and "substituted aryl" are included.

[0147] "Substituted aryl" refers to a group in which one or more hydrogen atoms of an "unsubstituted aryl" group have been substituted with a substituent. Examples of "substituted aryl" include the group in Specific Example Group G1A below in which one or more hydrogen atoms of an "unsubstituted aryl" group have been substituted with a substituent, and the substituted aryl group in Specific Example Group G1B below. It should be noted that the examples of "unsubstituted aryl" and "substituted aryl" listed here are only examples. The "substituted aryl" described in this specification also includes the group in Specific Example Group G1B below in which hydrogen atoms bonded to the carbon atom of the aryl group itself have been further substituted with a substituent, and the group in Specific Example Group G1B below in which hydrogen atoms of the substituent have been further substituted with a substituent.

[0148] • Unsubstituted aryl groups (specific example group G1A):

[0149] phenyl,

[0150] p-phenyl,

[0151] m-biphenylyl,

[0152] o-biphenylyl,

[0153] p-terphenyl-4-yl,

[0154] p-terphenyl-3-yl,

[0155] p-terphenyl-2-yl,

[0156] m-terphenyl-4-yl,

[0157] m-terphenyl-3-yl,

[0158] m-terphenyl-2-yl,

[0159] o-terphenyl-4-yl,

[0160] o-terphenyl-3-yl,

[0161] o-terphenyl-2-yl,

[0162] 1-naphthyl,

[0163] 2-naphthyl,

[0164] anthryl,

[0165] benzanthryl,

[0166] phenanthryl,

[0167] triphenylenyl,

[0168] phenalenyl,

[0169] pyrenyl,

[0170] chrysenyl,

[0171] benzochrysenyl,

[0172] triphenylenyl,

[0173] benzo triphenylenyl,

[0174] tetracenyl,

[0175] pentacenyl,

[0176] fluorenyl,

[0177] 9,9'-spirobifluorenyl,

[0178] benzofluorenyl,

[0179] dibenzofluorenyl,

[0180] fluoranthenyl,

[0181] benzofluoranthenyl,

[0182] perylenyl, and

[0183] The monovalent aryl group is derived by removing one hydrogen atom from the ring structure shown in the following general formulas (TEMP-1) to (TEMP-15).

[0184]

[0185]

[0186] • Substituted aryl groups (specific example group G1B):

[0187] o-Tolyl,

[0188] m-Tolyl,

[0189] p-Tolyl,

[0190] p-Xylyl,

[0191] m-Xylyl,

[0192] o-xylyl,

[0193] p-isopropylphenyl,

[0194] m-Isopropylphenyl,

[0195] o-isopropylphenyl,

[0196] p-tert-butylphenyl,

[0197] m-tert-butylphenyl,

[0198] o-tert-butylphenyl,

[0199] 3,4,5-Trimethylphenyl

[0200] 9,9-Dimethylfluorenyl,

[0201] 9,9-Diphenylfluorenyl

[0202] 9,9-Bis(4-methylphenyl)fluorenyl,

[0203] 9,9-Bis(4-isopropylphenyl)fluorenyl,

[0204] 9,9-Bis(4-tert-butylphenyl)fluorenyl,

[0205] cyanophenyl,

[0206] Triphenylsilylphenyl

[0207] Trimethylsilylphenyl

[0208] Phenynaphthyl,

[0209] Naphthylphenyl and

[0210] A group derived from the ring structure shown in the above general formulas (TEMP-1) to (TEMP-15) by substitution of one or more hydrogen atoms of a monovalent group with a substituent.

[0211] • "Substituted or unsubstituted heterocyclic groups"

[0212] The term "heterocyclic group" as used in this specification refers to a cyclic group whose cyclic atoms contain at least one heteroatom. Specific examples of heteroatoms include nitrogen, oxygen, sulfur, silicon, phosphorus, and boron atoms.

[0213] The term "heterocyclic group" as used in this specification refers to a monocyclic group or a fused-ring group.

[0214] The term "heterocyclic group" as used in this specification refers to either an aromatic heterocyclic group or a non-aromatic heterocyclic group.

[0215] Specific examples of "substituted or unsubstituted heterocyclic groups" described in this specification (specific example group G2) include unsubstituted heterocyclic groups (specific example group G2A) and substituted heterocyclic groups (specific example group G2B), etc. (Here, unsubstituted heterocyclic group refers to the case where "substituted or unsubstituted heterocyclic group" is "unsubstituted heterocyclic group", and substituted heterocyclic group refers to the case where "substituted or unsubstituted heterocyclic group" is "substituted heterocyclic group".) In this specification, the term "heterocyclic group" includes both "unsubstituted heterocyclic group" and "substituted heterocyclic group".

[0216] "Substituted heterocyclic group" refers to a group in which one or more hydrogen atoms of an "unsubstituted heterocyclic group" have been substituted with a substituent. Specific examples of "substituted heterocyclic groups" include the group in example group G2A below where the hydrogen atoms of the "unsubstituted heterocyclic group" have been substituted, and the example of a substituted heterocyclic group in example group G2B below. It should be noted that the examples of "unsubstituted heterocyclic groups" and "substituted heterocyclic groups" listed here are only examples. The "substituted heterocyclic groups" described in this specification also include the group in example group G2B where the hydrogen atoms bonded to the cyclic atoms of the heterocyclic group itself have been further substituted with a substituent, and the group in example group G2B where the hydrogen atoms of the substituent have been further substituted with a substituent.

[0217] Specific example group G2A includes, for example, the following unsubstituted heterocyclic groups containing nitrogen atoms (specific example group G2A1), unsubstituted heterocyclic groups containing oxygen atoms (specific example group G2A2), unsubstituted heterocyclic groups containing sulfur atoms (specific example group G2A3), and monovalent heterocyclic groups derived by removing one hydrogen atom from the ring structure shown in the following general formulas (TEMP-16) to (TEMP-33) (specific example group G2A4).

[0218] Specific example group G2B includes, for example, the following: a nitrogen-containing substituted heterocyclic group (specific example group G2B1), an oxygen-containing substituted heterocyclic group (specific example group G2B2), a sulfur-containing substituted heterocyclic group (specific example group G2B3), and a group in which one or more hydrogen atoms of a monovalent heterocyclic group derived from the ring structure shown in the following general formulas (TEMP-16) to (TEMP-33) have been substituted with a substituent (specific example group G2B4).

[0219] • Unsubstituted heterocyclic groups containing nitrogen atoms (specific example group G2A1):

[0220] pyrrole,

[0221] Imidazole group,

[0222] pyrazolyl,

[0223] Triazole group,

[0224] Tetrazolyl,

[0225] Oxazolyl,

[0226] Isoxazolyl,

[0227] Oxadiazole group,

[0228] Thiazole group,

[0229] Isothiazolyl,

[0230] Thiadiazole group,

[0231] pyridyl,

[0232] pyridazinyl,

[0233] Pyrimidine group,

[0234] Pyrazinyl,

[0235] Triazine group

[0236] Indole,

[0237] Isoindolyl,

[0238] Indazine-based

[0239] Quinazine-based

[0240] Quinoline,

[0241] Isoquinoline,

[0242] Crenoline group

[0243] Phthaloazine

[0244] Quinazolinyl,

[0245] Quinoxaloyl,

[0246] Benzimidazole group,

[0247] Indazole group,

[0248] phenanthroline,

[0249] phenanthridine,

[0250] acridine group,

[0251] Phenazine group,

[0252] Carbazolyl,

[0253] Benzocarbazolyl,

[0254] Morpholinyl,

[0255] phenoxazine group,

[0256] phenothiazine group,

[0257] Azacarbazolyl, and

[0258] Diazacarbazolyl.

[0259] • Unsubstituted heterocyclic groups containing oxygen atoms (specific example group G2A2):

[0260] furanyl,

[0261] Oxazolyl,

[0262] Isoxazolyl,

[0263] Oxadiazole group,

[0264] Xuton base,

[0265] Benzofuranyl,

[0266] Isobenzofuranyl,

[0267] Dibenzofuranyl,

[0268] Naphthobenzofuranyl,

[0269] Benzoxazolyl,

[0270] Benzisoxazole group,

[0271] phenoxazine group,

[0272] Morpholinyl,

[0273] Dinaphthylfuranyl,

[0274] Azadibenzofuranyl,

[0275] diazadibenzofuranyl,

[0276] Azanaphthalenebenzofuranyl and

[0277] Diazanaphthenebenzofuranyl.

[0278] • Unsubstituted heterocyclic groups containing sulfur atoms (specific example group G2A3):

[0279] Thiophene group

[0280] Thiazole group,

[0281] Isothiazolyl,

[0282] Thiadiazole group,

[0283] benzothienyl

[0284] isobenzothienyl

[0285] dibenzothienyl

[0286] Naphthobenzothienyl

[0287] Benzothiazolyl,

[0288] Benzisothiazolyl,

[0289] phenothiazine group,

[0290] dinaphthothienyl

[0291] azadibenzothienyl

[0292] diazadibenzothienyl

[0293] azanaphthobenzothienyl and

[0294] diazanaphthobenzothienyl.

[0295] • A monovalent heterocyclic group derived by removing one hydrogen atom from the ring structure shown in the following general formulas (TEMP-16) to (TEMP-33) (specific example group G2A4):

[0296]

[0297]

[0298] In the above general formulas (TEMP-16) to (TEMP-33), X A and Y A Each can be independently composed of an oxygen atom, a sulfur atom, NH, or CH2. Among them, X... A and Y A At least one of them is an oxygen atom, a sulfur atom, or NH.

[0299] In the above general formulas (TEMP-16) to (TEMP-33), X A and Y A When at least one of them is NH or CH2, the monovalent heterocyclic group derived from the ring structure shown in the above general formulas (TEMP-16) to (TEMP-33) includes a monovalent group obtained by removing one hydrogen atom from these NH or CH2.

[0300] • Heterocyclic groups containing nitrogen atoms (specific example group G2B1):

[0301] (9-phenyl)carbazole group,

[0302] (9-Biphenyl)carbazolyl,

[0303] (9-Phenyl)phenylcarbazoyl,

[0304] (9-Naphthyl)carbazole,

[0305] Diphenylcarbazole-9-yl,

[0306] Phenylexacarbazole-9-yl,

[0307] Methylbenzimidazole,

[0308] Ethylbenzimidazole,

[0309] Phenylacetyl,

[0310] Biphenyltriazine,

[0311] diphenyltriazine group,

[0312] phenylquinazolinyl, and

[0313] Biphenylquinazolinyl.

[0314] • Heterocyclic groups containing oxygen atoms (specific example group G2B2):

[0315] Phenyl dibenzofuranyl,

[0316] Methyldibenzofuranyl,

[0317] tert-butyldibenzofuranyl and

[0318] The monovalent residue of [9H-xanton-9,9'-[9H]fluorene].

[0319] • Heterocyclic groups containing sulfur atoms (specific example group G2B3):

[0320] Phenyl dibenzothiophene,

[0321] Methyldibenzothiophene,

[0322] tert-butyldibenzothiophene and

[0323] The monovalent residue of [9H-thiophene-9,9'-[9H]fluorene].

[0324] • Groups derived from the ring structures shown in the above general formulas (TEMP-16) to (TEMP-33) in which one or more hydrogen atoms of a monovalent heterocyclic group have been substituted with substituents (specific example group G2B4):

[0325] The aforementioned "one or more hydrogen atoms in a monovalent heterocyclic group" refers to hydrogen atoms bonded to the cyclic carbon atoms of the monovalent heterocyclic group, X A and Y A The hydrogen atom bonded to the nitrogen atom when at least one of them is NH and X A and Y A One of them is one or more hydrogen atoms in the methylene group when CH2 is present.

[0326] • "Substituted or unsubstituted alkyl groups"

[0327] As specific examples of "substituted or unsubstituted alkyl" described in this specification (specific example group G3), the following unsubstituted alkyl (specific example group G3A) and substituted alkyl (specific example group G3B) can be cited. (Here, unsubstituted alkyl refers to the case where "substituted or unsubstituted alkyl" is "unsubstituted alkyl", and substituted alkyl refers to the case where "substituted or unsubstituted alkyl" is "substituted alkyl".) Hereinafter, when referred to as "alkyl", both "unsubstituted alkyl" and "substituted alkyl" are included.

[0328] "Substituted alkyl" refers to a group in which one or more hydrogen atoms of an "unsubstituted alkyl" have been substituted with a substituent. Specific examples of "substituted alkyl" include groups in which one or more hydrogen atoms of an "unsubstituted alkyl" (specific example group G3A) have been substituted with a substituent, and examples of substituted alkyl (specific example group G3B). In this specification, "unsubstituted alkyl" refers to a chain-like alkyl group. Therefore, "unsubstituted alkyl" includes both straight-chain and branched-chain unsubstituted alkyl groups. It should be noted that the examples of "unsubstituted alkyl" and "substituted alkyl" listed here are only examples; the "substituted alkyl" described in this specification also includes groups in which the hydrogen atoms of the alkyl group in specific example group G3B have been further substituted with a substituent, and groups in which the hydrogen atoms of the substituents in specific example group G3B have been further substituted with a substituent.

[0329] • Unsubstituted alkyl groups (specific example group G3A):

[0330] methyl,

[0331] Ethyl,

[0332] n-propyl,

[0333] Isopropyl,

[0334] n-Butyl,

[0335] Isobutyl,

[0336] sec-butyl and

[0337] tert-butyl.

[0338] • Substituted alkyl groups (specific example group G3B):

[0339] Heptafluoropropyl (including isomers),

[0340] Pentafluoroethyl,

[0341] 2,2,2-Trifluoroethyl and

[0342] Trifluoromethyl

[0343] • "Substituted or unsubstituted alkenyl groups"

[0344] Specific examples of "substituted or unsubstituted alkenyl groups" (specific example group G4) described in this specification include unsubstituted alkenyl groups (specific example group G4A) and substituted alkenyl groups (specific example group G4B), etc. (Here, "unsubstituted alkenyl group" refers to the case where "substituted or unsubstituted alkenyl group" is "unsubstituted alkenyl group", and "substituted alkenyl group" refers to the case where "substituted or unsubstituted alkenyl group" is "substituted alkenyl group".) In this specification, when simply referred to as "alkenyl group", both "unsubstituted alkenyl group" and "substituted alkenyl group" are included.

[0345] "Substituted alkenyl" refers to a group in which one or more hydrogen atoms in an "unsubstituted alkenyl" group have been substituted with a substituent. Specific examples of "substituted alkenyl" include the "unsubstituted alkenyl" group (specific example group G4A) having a substituent and examples of substituted alkenyl groups (specific example group G4B). It should be noted that the examples of "unsubstituted alkenyl" and "substituted alkenyl" listed here are only examples; the "substituted alkenyl" described in this specification also includes groups in the "substituted alkenyl" group of specific example group G4B where the hydrogen atoms of the alkenyl itself have been further substituted with a substituent, and groups in the "substituted alkenyl" group of specific example group G4B where the hydrogen atoms of the substituent have been further substituted with a substituent.

[0346] • Unsubstituted alkenyl groups (specific example group G4A):

[0347] vinyl,

[0348] Allyl

[0349] 1-Butenyl,

[0350] 2-Butenyl and

[0351] 3-Butenyl.

[0352] • Substituted alkenyl groups (specific example group G4B):

[0353] 1,3-Butadienyl,

[0354] 1-Methylvinyl

[0355] 1-Methylallyl,

[0356] 1,1-Dimethylallyl,

[0357] 2-Methylallyl and

[0358] 1,2-Dimethylallyl.

[0359] • "Substituted or unsubstituted alkynyl groups"

[0360] As specific examples of "substituted or unsubstituted alkynyl groups" described in this specification (specific example group G5), the following unsubstituted alkynyl groups (specific example group G5A) can be cited. (Here, unsubstituted alkynyl group refers to the case where "substituted or unsubstituted alkynyl group" is "unsubstituted alkynyl group".) The following description of "alkynyl group" includes both "unsubstituted alkynyl group" and "substituted alkynyl group".

[0361] "Substituted alkynyl group" refers to a group in which one or more hydrogen atoms in an "unsubstituted alkynyl group" have been replaced by a substituent. Specific examples of "substituted alkynyl group" include groups in which one or more hydrogen atoms in an "unsubstituted alkynyl group" (specific example group G5A) have been replaced by a substituent.

[0362] • Unsubstituted alkynyl group (specific example group G5A):

[0363] Acetylene group.

[0364] • "Substituted or unsubstituted cycloalkyl groups"

[0365] Specific examples of "substituted or unsubstituted cycloalkyl" described in this specification (specific example group G6) include unsubstituted cycloalkyl (specific example group G6A) and substituted cycloalkyl (specific example group G6B), etc. (Here, unsubstituted cycloalkyl refers to the case where "substituted or unsubstituted cycloalkyl" is "unsubstituted cycloalkyl", and substituted cycloalkyl refers to the case where "substituted or unsubstituted cycloalkyl" is "substituted cycloalkyl".) In this specification, when referred to only as "cycloalkyl", both "unsubstituted cycloalkyl" and "substituted cycloalkyl" are included.

[0366] "Substituted cycloalkyl" refers to a group in which one or more hydrogen atoms in an "unsubstituted cycloalkyl" group have been substituted with a substituent. Specific examples of "substituted cycloalkyl" include the group in which one or more hydrogen atoms in an "unsubstituted cycloalkyl" group (specific example group G6A) have been substituted with a substituent, and examples of substituted cycloalkyl groups (specific example group G6B). It should be noted that the examples of "unsubstituted cycloalkyl" and "substituted cycloalkyl" listed here are only examples. The "substituted cycloalkyl" described in this specification also includes groups in which one or more hydrogen atoms bonded to the carbon atom of the cycloalkyl group itself in the "substituted cycloalkyl" group of specific example group G6B have been substituted with a substituent, and groups in which the hydrogen atoms of the substituent in the "substituted cycloalkyl" group of specific example group G6B have been further substituted with a substituent.

[0367] • Unsubstituted cycloalkyl groups (specific example group G6A):

[0368] Cyclopropyl,

[0369] Cyclobutyl,

[0370] Cyclopentyl,

[0371] Cyclohexyl,

[0372] 1-Adamantyl,

[0373] 2-Adamantyl,

[0374] 1-norborneol and

[0375] 2-norborneol.

[0376] • Substituted cycloalkyl groups (specific example group G6B):

[0377] 4-Methylcyclohexyl.

[0378] ·"-Si(R 901 (R) 902 (R) 903 The group shown in the figure”

[0379] As described in this specification, -Si(R) 901 (R) 902 (R) 903 Specific examples of the group shown (specific example group G7) can be given as follows:

[0380] -Si(G1)(G1)(G1),

[0381] -Si(G1)(G2)(G2)

[0382] -Si(G1)(G1)(G2),

[0383] -Si(G2)(G2)(G2),

[0384] -Si(G3)(G3)(G3) and

[0385] -Si(G6)(G6)(G6). Here.

[0386] G1 refers to the "substituted or unsubstituted aryl group" described in the specific example group G1.

[0387] G2 refers to the "substituted or unsubstituted heterocyclic group" described in the specific example group G2.

[0388] G3 refers to "substituted or unsubstituted alkyl group" as described in the specific example group G3.

[0389] G6 refers to "substituted or unsubstituted cycloalkyl" as described in the specific example group G6.

[0390] In -Si(G1)(G1)(G1), multiple G1s may be the same or different from each other.

[0391] In -Si(G1)(G2)(G2), multiple G2s may be the same or different from each other.

[0392] In -Si(G1)(G1)(G2), multiple G1s may be the same or different from each other.

[0393] In -Si(G2)(G2)(G2), multiple G2s may be the same or different from each other.

[0394] In -Si(G3)(G3)(G3), multiple G3s may be identical or different from each other.

[0395] In -Si(G6)(G6)(G6), multiple G6s may be identical or different from each other.

[0396] ·“-O-(R 904 The group shown in the figure”

[0397] As described in this specification, -O-(R) 904 Specific examples of the group shown in the figure (specific example group G8) can be given as follows:

[0398] -O(G1)

[0399] -O(G2),

[0400] -O(G3) and

[0401] -O(G6).

[0402] Here,

[0403] G1 refers to the "substituted or unsubstituted aryl group" described in the specific example group G1.

[0404] G2 refers to the "substituted or unsubstituted heterocyclic group" described in the specific example group G2.

[0405] G3 refers to "substituted or unsubstituted alkyl group" as described in the specific example group G3.

[0406] G6 refers to "substituted or unsubstituted cycloalkyl" as described in the specific example group G6.

[0407] ·“-S-(R 905 The group shown in the figure”

[0408] As described in this specification, -S-(R) 905 Specific examples of the group shown in the figure (specific example group G9) can be given as follows:

[0409] -S(G1),

[0410] -S(G2),

[0411] -S(G3) and

[0412] -S(G6).

[0413] Here,

[0414] G1 refers to the "substituted or unsubstituted aryl group" described in the specific example group G1.

[0415] G2 refers to the "substituted or unsubstituted heterocyclic group" described in the specific example group G2.

[0416] G3 refers to "substituted or unsubstituted alkyl group" as described in the specific example group G3.

[0417] G6 refers to "substituted or unsubstituted cycloalkyl" as described in the specific example group G6.

[0418] ·"-N(R 906 (R) 907 The group shown in the figure”

[0419] As described in this specification, -N(R) 906 (R) 907 Specific examples of the group shown (specific example group G10) can be given as follows:

[0420] -N(G1)(G1),

[0421] -N(G2)(G2),

[0422] -N(G1)(G2),

[0423] -N(G3)(G3) and

[0424] -N(G6)(G6).

[0425] Here,

[0426] G1 refers to the "substituted or unsubstituted aryl group" described in the specific example group G1.

[0427] G2 refers to the "substituted or unsubstituted heterocyclic group" described in the specific example group G2.

[0428] G3 refers to "substituted or unsubstituted alkyl group" as described in the specific example group G3.

[0429] G6 refers to "substituted or unsubstituted cycloalkyl" as described in the specific example group G6.

[0430] In -N(G1)(G1), multiple G1s may be the same or different from each other.

[0431] In -N(G2)(G2), multiple G2s may be the same or different from each other.

[0432] In -N(G3)(G3), multiple G3s may be the same or different from each other.

[0433] In -N(G6)(G6), multiple G6s may be the same or different from each other.

[0434] • "Halogen atom"

[0435] Specific examples of "halogen atoms" described in this specification (specific example group G11) include fluorine atoms, chlorine atoms, bromine atoms, and iodine atoms.

[0436] • "Substituted or unsubstituted fluoroalkyl groups"

[0437] The term "substituted or unsubstituted fluoroalkyl" as used in this specification refers to a group in which at least one hydrogen atom bonded to the carbon atom constituting the alkyl group has been replaced by a fluorine atom, and also includes a group in which all hydrogen atoms bonded to the carbon atom constituting the alkyl group have been replaced by fluorine atoms (perfluorinated groups). Unless otherwise specified in this specification, the number of carbon atoms in an "unsubstituted fluoroalkyl" group is 1 to 50, preferably 1 to 30, and more preferably 1 to 18. "Substituted fluoroalkyl" refers to a group in which one or more hydrogen atoms of a "fluoroalkyl" group have been replaced by a substituent. It should be noted that the term "substituted fluoroalkyl" as used in this specification also includes groups in which one or more hydrogen atoms bonded to the carbon atom of the alkyl chain in a "substituted fluoroalkyl" group have been further replaced by a substituent, and groups in which one or more hydrogen atoms of a substituent in a "substituted fluoroalkyl" group have been further replaced by a substituent. As a specific example of "unsubstituted fluoroalkyl", examples can be given of groups in which one or more hydrogen atoms in the above-mentioned "alkyl" (specific example group G3) have been replaced by fluorine atoms.

[0438] • "Substituted or unsubstituted haloalkyl groups"

[0439] The term "substituted or unsubstituted haloalkyl" as used in this specification refers to a group in which at least one hydrogen atom bonded to the carbon atom constituting the alkyl group has been replaced by a halogen atom, and also includes a group in which all hydrogen atoms bonded to the carbon atom constituting the alkyl group have been replaced by halogen atoms. Unless otherwise specified in this specification, the number of carbon atoms in an "unsubstituted haloalkyl" group is 1 to 50, preferably 1 to 30, and more preferably 1 to 18. "Substituted haloalkyl" refers to a group in which one or more hydrogen atoms of a "haloalkyl" group have been replaced by a substituent. It should be noted that "substituted haloalkyl" as used in this specification also includes groups in which one or more hydrogen atoms bonded to the carbon atom of the alkyl chain in a "substituted haloalkyl" group have been further replaced by a substituent, and groups in which one or more hydrogen atoms of a substituent in a "substituted haloalkyl" group have been further replaced by a substituent. As a specific example of "unsubstituted haloalkyl", examples can be given of groups in which one or more hydrogen atoms of the above-mentioned "alkyl" (specific example group G3) have been substituted with halogen atoms. Haloalkyl is sometimes called haloalkyl.

[0440] • "Substituted or unsubstituted alkoxy groups"

[0441] As a specific example of "substituted or unsubstituted alkoxy group" as described in this specification, it is the group indicated by -O (G3), where G3 is the "substituted or unsubstituted alkyl group" described in the specific example group G3. The number of carbon atoms of the "unsubstituted alkoxy group" is 1 to 50, preferably 1 to 30, and more preferably 1 to 18, unless otherwise specified in this specification.

[0442] • "Substituted or unsubstituted alkylthio groups"

[0443] As a specific example of "substituted or unsubstituted alkylthio group" as described in this specification, it is the group indicated by -S(G3), where G3 is the "substituted or unsubstituted alkyl group" described in the specific example group G3. The number of carbon atoms of the "unsubstituted alkylthio group" is 1 to 50, preferably 1 to 30, and more preferably 1 to 18, unless otherwise specified in this specification.

[0444] • "Substituted or unsubstituted aryloxy groups"

[0445] As a specific example of "substituted or unsubstituted aryloxy group" as described in this specification, it is the group indicated by -O (G1), where G1 refers to the "substituted or unsubstituted aryl group" described in the specific example group G1. The number of carbon atoms in the ring of the "unsubstituted aryloxy group" is 6 to 50, preferably 6 to 30, and more preferably 6 to 18, unless otherwise specified in this specification.

[0446] • "Substituted or unsubstituted arylthio groups"

[0447] As a specific example of "substituted or unsubstituted arylthio group" as described in this specification, it is the group indicated by -S(G1), where G1 refers to the "substituted or unsubstituted aryl group" described in the specific example group G1. The number of carbon atoms in the ring of the "unsubstituted arylthio group" is 6 to 50, preferably 6 to 30, and more preferably 6 to 18, unless otherwise specified in this specification.

[0448] • "Substituted or unsubstituted trialkylsilyl groups"

[0449] As a specific example of "trialkylsilyl" as described in this specification, it is the group represented by -Si(G3)(G3)(G3), where G3 refers to the "substituted or unsubstituted alkyl" described in the specific example group G3. The plurality of G3s in -Si(G3)(G3)(G3) may be identical or different from each other. Unless otherwise specified in this specification, the number of carbon atoms in each alkyl group of the "trialkylsilyl" is 1 to 50, preferably 1 to 20, and more preferably 1 to 6.

[0450] • "Substituted or unsubstituted aralkyl groups"

[0451] As a specific example of "substituted or unsubstituted aralkyl" as described in this specification, it is the group shown as -(G3)-(G1), where G3 is the "substituted or unsubstituted alkyl" described in specific example group G3, and G1 is the "substituted or unsubstituted aryl" described in specific example group G1. Therefore, "aralkyl" is a group in which the hydrogen atom of "alkyl" is replaced by "aryl" as a substituent, and is one embodiment of "substituted alkyl". "Unsubstituted aralkyl" is an "unsubstituted alkyl" that is substituted with "unsubstituted aryl", and the number of carbon atoms of "unsubstituted aralkyl" is 7 to 50, preferably 7 to 30, and more preferably 7 to 18, unless otherwise specified in this specification.

[0452] Specific examples of "substituted or unsubstituted aralkyl groups" include benzyl, 1-phenylethyl, 2-phenylethyl, 1-phenylisopropyl, 2-phenylisopropyl, phenyl tert-butyl, α-naphthylmethyl, 1-α-naphthylethyl, 2-α-naphthylethyl, 1-α-naphthylisopropyl, 2-α-naphthylisopropyl, β-naphthylmethyl, 1-β-naphthylethyl, 2-β-naphthylethyl, 1-β-naphthylisopropyl, and 2-β-naphthylisopropyl.

[0453] Unless otherwise specified in this specification, the substituted or unsubstituted aryl groups described herein are preferably phenyl, p-biphenyl, meta-biphenyl, o-biphenyl, p-terphenyl-4-yl, p-terphenyl-3-yl, p-terphenyl-2-yl, meta-terphenyl-4-yl, meta-terphenyl-3-yl, meta-terphenyl-2-yl, o-terphenyl-4-yl, o-terphenyl-3-yl, o-terphenyl-2-yl, 1-naphthyl, 2-naphthyl, anthraceneyl, phenanthryl, pyrene, phenyl, triphenylene, fluorene, 9,9'-spirobisfluorene, 9,9-dimethylfluorene, and 9,9-diphenylfluorene, etc.

[0454] Unless otherwise specified in this specification, the substituted or unsubstituted heterocyclic groups described herein are preferably pyridyl, pyrimidinyl, triazine, quinolinyl, isoquinolinyl, quinazolinyl, benzimidazolyl, phenanthrolinel, carbazole (1-carbazole, 2-carbazole, 3-carbazole, 4-carbazole or 9-carbazole), benzocarbazole, azacarbazole, diazacarbazole, dibenzofuranyl, naphthobenzofuranyl, azadibenzofuranyl, diazadibenzofuranyl, dibenzothiophene, and naphtho-benzofuranyl. Benzothiophene, azadibenzothiophene, diazadibenzothiophene, (9-phenyl)carbazoyl ((9-phenyl)carbazo-1-yl, (9-phenyl)carbazo-2-yl, (9-phenyl)carbazo-3-yl or (9-phenyl)carbazo-4-yl), (9-biphenyl)carbazoyl, (9-phenyl)phenylcarbazoyl, diphenylcarbazo-9-yl, phenylcarbazo-9-yl, phenyltriazinyl, biphenyltriazinyl, diphenyltriazinyl, phenyldibenzofuranyl and phenyldibenzothiophene, etc.

[0455] In this specification, the carbazoyl group, unless otherwise specified herein, specifically refers to any one of the following groups.

[0456]

[0457] In this specification, (9-phenyl)carbazolyl refers specifically to any one of the following groups unless otherwise specified herein.

[0458]

[0459] In the above general formulas (TEMP-Cz1) to (TEMP-Cz9), * indicates the bonding position.

[0460] In this specification, dibenzofuranyl and dibenzothiopheneyl are specifically any one of the following groups unless otherwise stated in this specification.

[0461]

[0462] In the above general formulas (TEMP-34) to (TEMP-41), * indicates the bonding position.

[0463] Unless otherwise specified in this specification, the substituted or unsubstituted alkyl groups described herein are preferably methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, and tert-butyl.

[0464] • "Substituted or unsubstituted aryl groups"

[0465] Unless otherwise stated, the "substituted or unsubstituted aryl group" described in this specification is a divalent group derived from the "substituted or unsubstituted aryl group" by removing one hydrogen atom from the aryl ring. Specific examples of "substituted or unsubstituted aryl group" (specific example group G12) include divalent groups derived from the "substituted or unsubstituted aryl group" described in specific example group G1 by removing one hydrogen atom from the aryl ring.

[0466] • "Substituted or unsubstituted divalent heterocyclic groups"

[0467] Unless otherwise specified, the "substituted or unsubstituted divalent heterocyclic group" described in this specification is a divalent group derived from the aforementioned "substituted or unsubstituted heterocyclic group" by removing one hydrogen atom from the heterocycle. Specific examples of "substituted or unsubstituted divalent heterocyclic groups" (specific example group G13) include divalent groups derived from the "substituted or unsubstituted heterocyclic group" described in specific example group G2 by removing one hydrogen atom from the heterocycle.

[0468] • "Substituted or unsubstituted alkylene compounds"

[0469] Unless otherwise stated, "substituted or unsubstituted alkylene groups" as described in this specification are divalent groups derived from "substituted or unsubstituted alkylene groups" by removing one hydrogen atom from the alkyl chain. Specific examples of "substituted or unsubstituted alkylene groups" (specific example group G14) include divalent groups derived from "substituted or unsubstituted alkylene groups" described in specific example group G3 by removing one hydrogen atom from the alkyl chain.

[0470] Unless otherwise specified in this specification, the substituted or unsubstituted aryl group described herein is preferably any one of the groups in the following general formulas (TEMP-42) to (TEMP-68).

[0471]

[0472]

[0473] In the above general formulas (TEMP-42) to (TEMP-52), Q1 to Q 10Each can be a hydrogen atom or a substituent independently.

[0474] In the above general formulas (TEMP-42) to (TEMP-52), * indicates the bonding position.

[0475]

[0476] In the above general formulas (TEMP-53) to (TEMP-62), Q1 to Q 10 Each can be a hydrogen atom or a substituent independently.

[0477] Formulas Q9 and Q 10 They can form rings by bonding with each other via single bonds.

[0478] In the above general formulas (TEMP-53) to (TEMP-62), * indicates the bonding position.

[0479]

[0480] In the above general formulas (TEMP-63) to (TEMP-68), Q1 to Q8 are each independently a hydrogen atom or a substituent.

[0481] In the above general formulas (TEMP-63) to (TEMP-68), * indicates the bonding position.

[0482] Unless otherwise specified in this specification, the substituted or unsubstituted divalent heterocyclic group described herein is preferably any group of the following general formulas (TEMP-69) to (TEMP-102).

[0483]

[0484]

[0485]

[0486] In the above general formulas (TEMP-69) to (TEMP-82), Q1 to Q9 are each independently a hydrogen atom or a substituent.

[0487]

[0488]

[0489]

[0490]

[0491] In the above general formulas (TEMP-83) to (TEMP-102), Q1 to Q8 are each independently a hydrogen atom or a substituent.

[0492] The above is an explanation of "substituents described in this specification".

[0493] • "Cases where bonds form rings"

[0494] In this specification, the description of "one or more groups of two or more adjacent elements bonded together to form a substituted or unsubstituted monocyclic ring, or bonded together to form a substituted or unsubstituted fused ring, or not bonded together" refers to the cases of "one or more groups of two or more adjacent elements bonded together to form a substituted or unsubstituted monocyclic ring", "one or more groups of two or more adjacent elements bonded together to form a substituted or unsubstituted fused ring", and "one or more groups of two or more adjacent elements not bonded together".

[0495] The following description addresses the cases described in this specification as "forming a substituted or unsubstituted monocyclic ring by bonding one or more groups of two or more adjacent elements together" and "forming a substituted or unsubstituted fused ring by bonding one or more groups of two or more adjacent elements together" (hereinafter, these cases are sometimes collectively referred to as "forming a ring by bonding"). The case of anthracene compounds represented by the following general formula (TEMP-103) with an anthracene ring as the parent skeleton will be used as an example.

[0496]

[0497] For example, in the case of R 921 ~R 930 In the case of "one or more groups of two or more adjacent elements bonded together to form a loop", a group consisting of two adjacent elements is referred to as R. 921 With R 922 group, R 922 With R 923 group, R 923 With R 924 group, R 924 With R 930 group, R 930 With R 925 group, R 925 With R 926 group, R 926 With R 927 group, R 927 With R 928 group, R 928 With R 929 The group, and R 929 With R 921 The group.

[0498] The phrase "one or more groups" refers to the fact that two or more of the aforementioned groups consisting of two or more adjacent elements can simultaneously form a loop. For example, in R... 921 With R 922 They bond together to form a ring Q A Moreover, R 925 With R 926 They bond together to form a ring Q B In this case, the anthracene compound represented by the above general formula (TEMP-103) is represented by the following general formula (TEMP-104).

[0499]

[0500] The formation of rings from "groups consisting of two or more adjacent elements" includes not only the case of bonds formed by groups consisting of "two" adjacent elements, as in the previous example, but also the case of bonds formed by groups consisting of "three or more" adjacent elements. For example, it refers to R... 921 With R 922 They bond together to form a ring Q A And R 922 With R 923 They bond together to form a ring Q C , consisting of 3 adjacent (R) 921 R 922 and R 923 When the groups of components Q bond together to form a ring and fuse to the anthracene matrix, the anthracene compound represented by the above general formula (TEMP-103) is represented by the following general formula (TEMP-105). In the following general formula (TEMP-105), ring Q... A and ring Q C There are a total of R 922 .

[0501]

[0502] In the formed "single ring" or "fused ring," the structure of the ring alone can be either a saturated ring or an unsaturated ring. Even when a "single ring" or "fused ring" is formed from "one group of two adjacent rings," the "single ring" or "fused ring" can still form a saturated ring or an unsaturated ring. For example, the ring Q formed in the above general formula (TEMP-104) A and ring Q B Each is either a "single ring" or a "fused ring". Additionally, the ring Q formed in the above general formula (TEMP-105) A and Q ring C It is a "fused ring". The ring Q of the above general formula (TEMP-105) A With ring Q C Through ring Q A With ring QC Fusing together forms a fused ring. The ring Q of the above general formula (TMEP-104) A If it is a benzene ring, then ring Q A It is a single ring. The ring Q in the above general formula (TMEP-104) A If it is a naphthalene ring, then ring Q A It is a fused ring.

[0503] "Unsaturated rings" refer to aromatic hydrocarbon rings or aromatic heterocycles. "Saturated rings" refer to aliphatic hydrocarbon rings or non-aromatic heterocycles.

[0504] As a specific example of an aromatic hydrocarbon ring, the structure formed by the hydrogen atom-terminated group in specific example group G1 can be cited.

[0505] As a specific example of an aromatic heterocycle, one can cite the structure formed by end-capping an aromatic heterocycle group with hydrogen atoms in specific example group G2.

[0506] As a specific example of an aliphatic hydrocarbon ring, the structure formed by the hydrogen atom-terminated group in specific example group G6 can be cited.

[0507] "Ring formation" refers to the formation of a ring solely by multiple atoms of the parent skeleton, or by multiple atoms of the parent skeleton forming a ring with one or more other optional elements. For example, R shown in the above general formula (TEMP-104) 921 With R 922 The ring Q formed by mutual bonding A It refers to R 921 The carbon atoms and R atoms of the bonded anthracene skeleton 922 The carbon atoms of the bonded anthracene framework form rings with one or more optional elements. As a specific example, in the case of R... 921 With R 922 Forming ring Q A In the case of R 921 The carbon atoms and R atoms of the bonded anthracene skeleton 922 When the bonded anthracene skeleton carbon atoms and 4 carbon atoms form a monocyclic unsaturated ring, R 921 With R 922 The resulting ring is a benzene ring.

[0508] Here, "optional element" is preferably selected from at least one element chosen from the group consisting of carbon, nitrogen, oxygen, and sulfur, unless otherwise specified in this specification. In the case of optional elements (e.g., carbon or nitrogen), non-ring bonds can be capped by hydrogen atoms or replaced by "optional substituents" described later. When optional elements other than carbon are included, the resulting ring is a heterocycle.

[0509] Unless otherwise specified in this specification, the "one or more optional elements" constituting a monocyclic or fused ring are preferably two or more and 15 or less, more preferably three or more and 12 or less, and even more preferably three or more and 5 or less.

[0510] Unless otherwise stated in this specification, "monocyclic" is preferred over "fused-ring".

[0511] Unless otherwise stated in this specification, "unsaturated ring" is preferred over "saturated ring".

[0512] Unless otherwise stated in this specification, "monocyclic" is preferably a benzene ring.

[0513] Unless otherwise stated in this specification, the "unsaturated ring" is preferably a benzene ring.

[0514] In the case of “one or more groups consisting of two or more adjacent elements”, “forming a substituted or unsubstituted monocyclic ring by mutual bonding”, or “forming a substituted or unsubstituted fused ring by mutual bonding”, unless otherwise stated in this specification, it is preferred that one or more groups consisting of two or more adjacent elements are mutually bonded to form a substituted or unsubstituted “unsaturated ring” consisting of a plurality of atoms of a parent skeleton and at least one element selected from the group consisting of carbon, nitrogen, oxygen and sulfur.

[0515] When the aforementioned "monocyclic" or "fused-ring" rings have substituents, the substituents are, for example, the "optional substituents" described later. Specific examples of substituents when the aforementioned "monocyclic" or "fused-ring" rings have substituents are the substituents described in the section "Substituents Represented in This Specification" above.

[0516] When the aforementioned "saturated ring" or "unsaturated ring" has a substituent, the substituent is, for example, the "optional substituent" described later. Specific examples of substituents when the aforementioned "monocyclic" or "fused ring" has a substituent are the substituents described in the section "Substituents Represented in This Specification" above.

[0517] The above explains the cases of "a single ring formed by bonding one or more groups of two or more adjacent elements together" and "a fused ring formed by bonding one or more groups of two or more adjacent elements together" ("the case of forming a ring by bonding").

[0518] Substituents when described as "substituted or unsubstituted"

[0519] In one embodiment of this specification, the substituents described above as "substituted or unsubstituted" (sometimes referred to as "optional substituents" in this specification) are, for example, selected from...

[0520] Unsubstituted alkyl groups having 1 to 50 carbon atoms

[0521] Unsubstituted alkenyl groups with 2 to 50 carbon atoms

[0522] Unsubstituted acetylinyl groups with 2 to 50 carbon atoms

[0523] Unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0524] -Si(R 901 (R) 902 (R) 903 ),

[0525] -O-(R 904 ),

[0526] -S-(R 905 ),

[0527] -N(R 906 (R) 907 ),

[0528] Halogen atom, cyano group, nitro group,

[0529] Unsubstituted aryl groups with 6 to 50 carbon atoms and

[0530] Unsubstituted heterocyclic groups with 5 to 50 cyclic atoms

[0531] Groups, etc., in the composition group

[0532] Here, R 901 ~R 907 Each independently

[0533] hydrogen atom,

[0534] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0535] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0536] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[0537] A heterocyclic group with 5 to 50 cyclic atoms, either substituted or unsubstituted.

[0538] In R 901 When there are more than two, more than two R 901 They are the same or different.

[0539] In R902 When there are more than two, more than two R 902 They are the same or different.

[0540] In R 903 When there are more than two, more than two R 903 They are the same or different.

[0541] In R 904 When there are more than two, more than two R 904 They are the same or different.

[0542] In R 905 When there are more than two, more than two R 905 They are the same or different.

[0543] In R 906 When there are more than two, more than two R 906 They are the same or different.

[0544] In R 907 When there are more than two, more than two R 907 They are the same or different.

[0545] In one embodiment, the substituent when described as "substituted or unsubstituted" is selected freely.

[0546] Alkyl groups with 1 to 50 carbon atoms

[0547] Aryl groups with 6 to 50 carbon atoms and

[0548] Groups in the group consisting of heterocyclic groups with 5 to 50 cyclic atoms.

[0549] In one embodiment, the substituent when described as "substituted or unsubstituted" is selected freely.

[0550] Alkyl groups having 1 to 18 carbon atoms

[0551] aryl groups with 6 to 18 carbon atoms and

[0552] Groups in the group consisting of heterocyclic groups with 5 to 18 cyclic atoms.

[0553] Specific examples of the substituents mentioned above are those described in the section "Substituents as set forth in this specification".

[0554] Unless otherwise stated in this specification, adjacent optional substituents may form a "saturated ring" or an "unsaturated ring" with each other, preferably forming a substituted or unsubstituted saturated five-membered ring, a substituted or unsubstituted saturated six-membered ring, a substituted or unsubstituted unsaturated five-membered ring, or a substituted or unsubstituted unsaturated six-membered ring, more preferably forming a benzene ring.

[0555] Unless otherwise stated in this specification, optional substituents may also have other substituents. Any further substituents that may be present as optional substituents are the same as those described above.

[0556] In this specification, the numerical range represented by "AA~BB" refers to the range included by taking the value AA, which is written before "AA~BB", as the lower limit and the value BB, which is written after "AA~BB", as the upper limit.

[0557] [First Implementation]

[0558] Organic electroluminescent devices

[0559] One embodiment of the organic EL element includes a cathode, an anode, and a light-emitting unit disposed between the cathode and the anode. The light-emitting unit includes a light-emitting region. In the organic EL element of this embodiment, the light-emitting region is disposed between the anode and the cathode. In the organic EL element of this embodiment, the light-emitting region includes a first light-emitting layer and a second light-emitting layer. In addition to the first and second light-emitting layers included in the light-emitting region, the light-emitting unit may also have one or more layers containing at least one of organic compounds and inorganic substances. The inorganic substance is at least one of inorganic compounds and elements. Preferably, the light-emitting unit includes one or more layers selected from those composed of organic compounds, those composed of inorganic substances, and those composed of both organic compounds and inorganic substances. As layers that the light-emitting unit may also include in addition to the first and second light-emitting layers, examples of layers that can be used in organic EL elements can be cited. As for layers that can be used in organic EL elements, there is no particular limitation, examples of which include at least one layer selected from hole injection layers, hole transport layers, electron injection layers, electron transport layers, and blocking layers.

[0560] The organic EL element involved in this embodiment includes the organic EL element involved in the first scheme described below.

[0561] The first embodiment of this organic EL element has an anode, a cathode, and a light-emitting region disposed between the anode and the cathode. In the organic EL element of the first embodiment, the anode, the light-emitting region, and the cathode are disposed sequentially. The light-emitting region includes a first light-emitting layer and a second light-emitting layer. The first light-emitting layer contains a first host material and a first dopant material. The second light-emitting layer contains a second host material and a second dopant material. The first dopant material is a compound selected from the group of polycyclic aromatic compounds shown in the following formula (DX). The first host material is a compound shown in the following formula (H1-1) or the following formula (H1-2). The first host material and the second host material are different from each other. The first dopant material and the second dopant material are the same as or different from each other.

[0562] In the organic EL element of this embodiment, the stacked first and second light-emitting layers contain a predetermined compound as a first host material, a first dopant material, a second host material, and a second dopant material. The first dopant material is a compound selected from the group of polycyclic aromatic compounds represented by formula (DX), and the second host material is a compound represented by formula (H1-1) or formula (H1-2). Therefore, the organic EL element of this embodiment can emit light with high efficiency and long lifetime.

[0563] (First dopant material and second dopant material)

[0564] In the organic EL element involved in this embodiment, the first dopant material and the second dopant material may be the same as or different from each other.

[0565] In the organic EL element involved in this embodiment, it is also preferred that the first dopant material and the second dopant material are different compounds.

[0566] (First dopant material)

[0567] In the organic EL element of this embodiment, the first dopant material is a compound selected from the group of polycyclic aromatic compounds represented by the following formula (DX).

[0568]

[0569] (In the above formula (DX),

[0570] Rings a, b, and c are each independently...

[0571] Substituted or unsubstituted aromatic hydrocarbon rings with 6 to 50 carbon atoms, or

[0572] Heterocycles with 5 to 50 cyclic atoms, substituted or unsubstituted.

[0573] Y 1Boron atoms, phosphorus atoms, P=O, P=S, aluminum atoms, gallium atoms, arsenic atoms, Si-R 40 Or Ge-R 42 ,

[0574] R 40 and R 42 Each independently

[0575] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0576] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0577] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[0578] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[0579] X 1 and X 2 Each independently consists of an oxygen atom and NR. 41 sulfur atoms or selenium atoms

[0580] R 41

[0581] Bonded to ring a, ring b, or ring c to form substituted or unsubstituted monocyclic rings.

[0582] Bonded to ring a, ring b, or ring c to form substituted or unsubstituted fused rings, or

[0583] It does not bond with the aforementioned rings a, b, and c.

[0584] R does not form the aforementioned substituted or unsubstituted monocyclic rings and does not form the aforementioned substituted or unsubstituted fused rings. 41 for

[0585] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0586] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[0587] Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms

[0588] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0589] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[0590] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[0591] Multiple R 41 (They may be the same or different.)

[0592] In the organic EL device involved in this embodiment, Si-R 40 The R in the group shown 40 Preferably, it is an alkyl group with 1 to 50 carbon atoms that has been substituted or unsubstituted, or an aryl group with 6 to 50 carbon atoms that has been substituted or unsubstituted; more preferably, it is an alkyl group with 1 to 6 carbon atoms that has been substituted or unsubstituted, or an aryl group with 6 to 18 carbon atoms that has been substituted or unsubstituted.

[0593] In the organic EL element involved in this embodiment, Ge-R 42 The R in the group shown 42 Preferably, it is an alkyl group with 1 to 50 carbon atoms that has been substituted or unsubstituted, or an aryl group with 6 to 50 carbon atoms that has been substituted or unsubstituted; more preferably, it is an alkyl group with 1 to 6 carbon atoms that has been substituted or unsubstituted, or an aryl group with 6 to 18 carbon atoms that has been substituted or unsubstituted.

[0594] In the organic EL element involved in this embodiment, Y in the above formula (DX) 1 Boron atoms are preferred.

[0595] In the organic EL element involved in this embodiment, X in formula (DX) 1 and X 2 All are NR 41 In this case, it is preferable that at least one party's R 41 It is a group represented by the following formula (Ar-1).

[0596]

[0597] (In the above formula (Ar-1),

[0598] B 1

[0599] Rings a, b, or c are connected to each other via a linking group L. A bonding,

[0600] The rings a, b, or c mentioned above are bonded to each other via single bonds, or

[0601] It does not bond with rings a, b, and c mentioned above.

[0602] B 1

[0603] With R A Bonding to form substituted or unsubstituted monocyclic rings,

[0604] With R A Bonding to form substituted or unsubstituted fused rings, or

[0605] Not with R A bonding,

[0606] Not bonded to rings a, b, and c above, and not bonded to R A bonded B 1 for

[0607] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0608] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[0609] Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms

[0610] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0611] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms

[0612] Substituted or unsubstituted aryloxy groups with 6 to 50 carbon atoms, or

[0613] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[0614] By R A R B R C and R D One or more groups consisting of two or more adjacent elements.

[0615] They bond together to form substituted or unsubstituted monocyclic rings.

[0616] They bond together to form substituted or unsubstituted fused rings, or

[0617] They do not bond with each other.

[0618] R does not form the aforementioned substituted or unsubstituted monocyclic rings and does not form the aforementioned substituted or unsubstituted fused rings. A R B R C and R D Each independently

[0619] hydrogen atom,

[0620] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0621] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[0622] Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms

[0623] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0624] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms

[0625] Substituted or unsubstituted aryloxy groups with 6 to 50 carbon atoms, or

[0626] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[0627] * indicates the bonding site with the N atom.

[0628] (linking group L) A for

[0629] >C(-R) F 2.

[0630] >O、

[0631] >S, or

[0632] >CO,

[0633] The above > C(-R) F )2 of 2 R F

[0634] They bond together to form substituted or unsubstituted monocyclic rings.

[0635] They bond together to form substituted or unsubstituted fused rings, or

[0636] They do not bond with each other.

[0637] R does not form the aforementioned substituted or unsubstituted monocyclic rings and does not form the aforementioned substituted or unsubstituted fused rings. F Each independently

[0638] hydrogen atom,

[0639] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms

[0640] Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms

[0641] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms, or

[0642] (Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms)

[0643] In the organic EL element involved in this embodiment, B in the above formula (Ar-1) 1 R B and R D each independently

[0644] Preferably, it is an alkyl group with 1 to 50 carbon atoms, either substituted or unsubstituted, or an aryl group with 6 to 50 carbon atoms, either substituted or unsubstituted.

[0645] More preferably, it is a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 carbon atoms in a cyclic formation.

[0646] Further preferred are substituted or unsubstituted alkyl groups having 1 to 10 carbon atoms, or substituted or unsubstituted aryl groups having 6 to 18 carbon atoms in a cyclic formation.

[0647] More preferably, it is a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted cyclic group having 6 to 12 carbon atoms.

[0648] In the organic EL element involved in this embodiment, B in the above formula (Ar-1) 1 and R B Each aryl group is preferably a substituted or unsubstituted aryl group with 6 to 50 carbon atoms, more preferably a substituted or unsubstituted aryl group with 6 to 30 carbon atoms, even more preferably a substituted or unsubstituted aryl group with 6 to 18 carbon atoms, and even more preferably a substituted or unsubstituted aryl group with 6 to 12 carbon atoms.

[0649] In the organic EL element involved in this embodiment, B in the above formula (Ar-1) 1 and R B Each of the alkyl groups is preferably a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, more preferably a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, even more preferably a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, and even more preferably a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms.

[0650] In the organic EL element involved in this embodiment, B in the above formula (Ar-1) 1 and R B Preferably, the same functional groups are used.

[0651] In the organic EL element involved in this embodiment, B in the above formula (Ar-1) 1 and R B It is also preferable to use different functional groups.

[0652] In the organic EL element involved in this embodiment, B in the above formula (Ar-1) 1 and R D Preferably, the same functional groups are used.

[0653] In the organic EL element involved in this embodiment, it is also preferred that B in the above formula (Ar-1) is... 1 and R D For the same group, R B To be with B 1 and R D Different groups.

[0654] In the organic EL element involved in this embodiment, it is also preferred that R in the above formula (Ar-1) is... A and R C It is a hydrogen atom.

[0655] In the organic EL element involved in this embodiment, it is also preferred that R in the above formula (Ar-1) is... A R C and R D It is a hydrogen atom.

[0656] In the organic EL element of this embodiment, the first dopant material is preferably a compound represented by the following formulas (Da), (Db), (Dc), (Dd), (De), (Df), (Dg), (Dh), (Di), (Dj), or (Dk).

[0657]

[0658]

[0659]

[0660]

[0661]

[0662]

[0663]

[0664] (In the above formulas (Da)~(Dk),

[0665] By R a1 ~R a3 R b1 ~R b4 R x1 R x2 R c1 ~R c4 R g1 ~R g5 R m1 ~R m4 and R k1 ~R k3 One or more groups consisting of two or more adjacent elements.

[0666] They bond together to form substituted or unsubstituted monocyclic rings.

[0667] They bond together to form substituted or unsubstituted fused rings, or

[0668] They do not bond with each other.

[0669] R does not form the aforementioned substituted or unsubstituted monocyclic rings and does not form the aforementioned substituted or unsubstituted fused rings. a1 ~R a3 R b1 ~R b4 R c1 ~R c4 R g1 ~R g5 R m1 ~R m4 and R k1 ~R k3 Each independently

[0670] hydrogen atom,

[0671] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms

[0672] Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms

[0673] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0674] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0675] -Si(R 301 (R) 302 (R) 303 The groups shown in the figure,

[0676] -O-(R 304 The groups shown in the figure,

[0677] -S-(R 305 The groups shown in the figure,

[0678] -N(R 306 (R) 307 The groups shown in the figure,

[0679] -B(R 308 (R) 309 The groups shown in the figure,

[0680] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[0681] cyano, or

[0682] Halogen atoms,

[0683] R does not form the aforementioned substituted or unsubstituted monocyclic rings and does not form the aforementioned substituted or unsubstituted fused rings. x1 and R x2 Each independently

[0684] hydrogen atom,

[0685] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms

[0686] Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms

[0687] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0688] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0689] -Si(R 301 (R) 302 (R) 303 The groups shown in the figure,

[0690] -O-(R 304 The groups shown in the figure,

[0691] -S-(R 305 The groups shown in the figure,

[0692] -B(R 308 (R) 309 The groups shown in the figure,

[0693] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[0694] cyano, or

[0695] Halogen atoms,

[0696] The meanings of Ar1, Ar2, and Ar3 are each independently related to R in the above formula (DX). 41 The meaning is the same.

[0697] Z 1 for

[0698] >O、

[0699] >NR NZ ,

[0700] >C(-R) CZ 2.

[0701] >Si(-R IZ 2.

[0702] >S, or

[0703] >Se,

[0704] Multiple Z 1 They are the same or different.

[0705] >C(-R) CZ )2 of 2 R CZ

[0706] They bond together to form substituted or unsubstituted monocyclic rings.

[0707] They bond together to form substituted or unsubstituted fused rings, or

[0708] They do not bond with each other.

[0709] >Si(-R IZ )2 of 2 R IZ

[0710] They bond together to form substituted or unsubstituted monocyclic rings.

[0711] They bond together to form substituted or unsubstituted fused rings, or

[0712] They do not bond with each other.

[0713] R NZ R and R that do not form the aforementioned substituted or unsubstituted monocyclic rings and do not form the aforementioned substituted or unsubstituted fused rings. CZ and R IZ Each independently

[0714] hydrogen atom,

[0715] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms

[0716] Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms

[0717] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms, or

[0718] Substituted or unsubstituted cycloalkyl groups having 3 to 50 carbon atoms,

[0719] Ring f is

[0720] Substituted or unsubstituted aromatic hydrocarbon rings with 6 to 50 carbon atoms, or

[0721] Substituted or unsubstituted aliphatic hydrocarbon rings with 5 to 50 carbon atoms

[0722] Y 1 It is a single bond or a linking group.

[0723] Y 2 It is a single bond or a linking group.

[0724] Y 3 It is a single bond or a linking group.

[0725] m is 0 or 1.

[0726] n is 0 or 1,

[0727] p is 0 or 1,

[0728] The sum of n and p is 0 or 1.

[0729] When m is 0, -(Y 1 )0- is not a single bond or linking group connecting ring f to ring b.

[0730] When n is 0, -(Y 2 )0- is not a single bond or linking group connecting ring k and ring c.

[0731] When p is 0, -(Y 3 )0- is not a single bond or linking group connecting ring k to ring a.

[0732] Y as a linking group 1 Y 2 and Y 3 Each independently

[0733] >C(-R) Y 2.

[0734] >O、

[0735] >S, or

[0736] >CO,

[0737] The above > C(-R) Y )2 of 2 R Y

[0738] They bond together to form substituted or unsubstituted monocyclic rings.

[0739] They bond together to form substituted or unsubstituted fused rings, or

[0740] They do not bond with each other.

[0741] R does not form the aforementioned substituted or unsubstituted monocyclic rings and does not form the aforementioned substituted or unsubstituted fused rings. Y Each independently

[0742] hydrogen atom,

[0743] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms

[0744] Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms

[0745] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0746] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0747] -Si(R 301 (R) 302 (R)303 The groups shown in the figure,

[0748] -O-(R 304 The groups shown in the figure,

[0749] -S-(R 305 The groups shown in the figure,

[0750] -N(R 306 (R) 307 The groups shown in the figure,

[0751] -B(R 308 (R) 309 The groups shown in the figure,

[0752] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[0753] cyano, or

[0754] Halogen atoms,

[0755] In each of the formulas (Da) to (Dk), at least one of the aromatic hydrocarbon rings or heterocycles can be fused with at least one cycloalkane, and the cycloalkane can be substituted by at least one substituent, wherein at least one -CH2- in the cycloalkane can be replaced by -O-.

[0756] At least one hydrogen atom in each of the equations (Da) to (Dk) can be replaced by a halogen atom.

[0757] (In the first dopant material mentioned above,

[0758] By R 306 and R 307 Groups

[0759] Interconnected via linking group L N bonding,

[0760] They are bonded together via single bonds, or

[0761] They do not bond with each other.

[0762] By R 308 and R 309 Groups

[0763] Interconnected via linking group L B bonding,

[0764] They are bonded together via single bonds, or

[0765] They do not bond with each other.

[0766] R 301 ~R 305R and R that do not form the aforementioned substituted or unsubstituted monocyclic rings and do not form the aforementioned substituted or unsubstituted fused rings. 306 ~R 309 Each independently

[0767] hydrogen atom,

[0768] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0769] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0770] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[0771] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[0772] In R 301 When multiple R exist, multiple R 301 They are the same or different.

[0773] In R 302 When multiple R exist, multiple R 302 They are the same or different.

[0774] In R 303 When multiple R exist, multiple R 303 They are the same or different.

[0775] In R 304 When multiple R exist, multiple R 304 They are the same or different.

[0776] In R 305 When multiple R exist, multiple R 305 They are the same or different.

[0777] In R 306 When multiple R exist, multiple R 306 They are the same or different.

[0778] In R 307 When multiple R exist, multiple R 307 They are the same or different.

[0779] In R 308 When multiple R exist, multiple R 308 They are the same or different.

[0780] In R 309 When multiple R exist, multiple R 309 (They may be the same or different.)

[0781] (linking group L) N and linking group L B Each independently

[0782] >C(-R) F 2.

[0783] >O、

[0784] >S, or

[0785] >CO,

[0786] The above > C(-R) F )2 of 2 R F

[0787] They bond together to form substituted or unsubstituted monocyclic rings.

[0788] They bond together to form substituted or unsubstituted fused rings, or

[0789] They do not bond with each other.

[0790] R does not form the aforementioned substituted or unsubstituted monocyclic rings and does not form the aforementioned substituted or unsubstituted fused rings. F Each independently

[0791] hydrogen atom,

[0792] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms

[0793] Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms

[0794] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms, or

[0795] (Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms)

[0796] In cases where at least one aromatic hydrocarbon ring or heterocycle in formulas (Da) to (Df) is fused with at least one cycloalkane, it is preferable that each of the at least one substituent in the cycloalkane is independently […].

[0797] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms

[0798] Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms

[0799] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0800] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0801] -Si(R 301 (R) 302 (R) 303 The groups shown in the figure,

[0802] -O-(R 304 The groups shown in the figure,

[0803] -S-(R 305 The groups shown in the figure,

[0804] -N(R 306 (R) 307 The groups shown in the figure,

[0805] -B(R 308 (R) 309 The groups shown in the figure,

[0806] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[0807] cyano, or

[0808] Halogen atom.

[0809] In the organic EL element involved in this embodiment, Ar1 in formula (Da) is formula (Ar-1) and B in formula (Ar-1) 1 An example of a compound in which ring b is bonded to each other via a single bond is represented by the following formula (D-aa).

[0810] In the organic EL element involved in this embodiment, Ar1 in formula (Da) is formula (Ar-1) and B in formula (Ar-1) 1 An example of a compound in which the ring a is bonded to each other via a single bond is represented by the following formula (D-ab).

[0811]

[0812] (In the above formula (D-aa) or formula (D-ab),

[0813] R a1 ~R a3 R b1 ~R b4 R x1 R x2 and R c1 ~R c4 The meanings are respectively related to R in the above formula (Da). a1 ~R a3 R b1 ~R b4 R x1 R x2 and R c1 ~R c4 The meaning is the same.

[0814] R A R B R C and RD The meaning of R is the same as in the above formula (Ar-1). A R B R C and R D The meanings are the same.

[0815] In the organic EL element involved in this embodiment, it is also preferred that either the first dopant material or the second dopant material is a compound represented by the above formula (D-aa) or formula (D-ab).

[0816] In the organic EL element of this embodiment, it is also preferred that the first dopant material is a compound represented by the following formula (D-a1), (D-a2), (D-a3), (D-a4), (D-a5), (D-a6) or (D-a7).

[0817]

[0818]

[0819]

[0820]

[0821] (In the above formulas (D-a1) to (D-a7),

[0822] R a1 ~R a3 R b1 ~R b4 and R c1 ~R c4 The meanings are respectively related to R in the above formula (Da). a1 ~R a3 R b1 ~R b4 and R c1 ~R c4 The meaning is the same.

[0823] R x1 and R x2 The meanings are respectively related to R in the above formula (Da). x1 and R x2 The meaning is the same.

[0824] By R d1 ~R d4 and R e1 ~R e5 One or more groups consisting of two or more adjacent elements.

[0825] They bond together to form substituted or unsubstituted monocyclic rings.

[0826] They bond together to form substituted or unsubstituted fused rings, or

[0827] They do not bond with each other.

[0828] R does not form the aforementioned substituted or unsubstituted monocyclic rings and does not form the aforementioned substituted or unsubstituted fused rings. d1 ~R d4 and R e1 ~R e5 Each independently

[0829] hydrogen atom,

[0830] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms

[0831] Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms

[0832] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0833] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0834] -Si(R 301 (R) 302 (R) 303 The groups shown in the figure,

[0835] -O-(R 304 The groups shown in the figure,

[0836] -S-(R 305 The groups shown in the figure,

[0837] -N(R 306 (R) 307 The groups shown in the figure,

[0838] -B(R 308 (R) 309 The groups shown in the figure,

[0839] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[0840] cyano, or

[0841] Halogen atoms,

[0842] Me represents the methyl group.

[0843] In the organic EL element involved in this embodiment, it is also preferred that the first dopant material is a compound represented by the following formula (D-b1), formula (D-b2) or formula (D-b3).

[0844]

[0845]

[0846] (In the above formulas (D-b1) to (D-b3),

[0847] R a1 ~R a3 R b1 ~R b4 R c1 ~R c4 R x1 The meanings of Ar1 and Ar2 are respectively the same as R in the above formula (Db). a1 ~R a3 R b1 ~R b4 R c1 ~R c4 R x1 Ar1 and Ar2 have the same meaning.

[0848] In the organic EL element involved in this embodiment, it is also preferred that the first dopant material is a compound represented by the following formula (D-c1), formula (D-c2), formula (D-c3) or formula (D-c4).

[0849]

[0850]

[0851]

[0852]

[0853] (In the above formulas (D-c1) to (D-c4),

[0854] R a1 ~R a3 R b1 ~R b4 R c1 ~R c4 R g1 ~R g5 The meanings of Ar1 and Ar2 are respectively related to R in the above formula (Dc). a1 ~R a3 R b1 ~R b4 R c1 ~R c4 R g1 ~R g5 Ar1 and Ar2 have the same meaning.

[0855] Z 1It is >S, >O, or >C(-CH3)2.

[0856] By R h1 ~R h8 One or more groups consisting of two or more adjacent elements.

[0857] They bond together to form substituted or unsubstituted monocyclic rings.

[0858] They bond together to form substituted or unsubstituted fused rings, or

[0859] They do not bond with each other.

[0860] R does not form the aforementioned substituted or unsubstituted monocyclic rings and does not form the aforementioned substituted or unsubstituted fused rings. h1 ~R h8 Each independently

[0861] hydrogen atom,

[0862] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms

[0863] Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms

[0864] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0865] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0866] -Si(R 301 (R) 302 (R) 303 The groups shown in the figure,

[0867] -O-(R 304 The groups shown in the figure,

[0868] -S-(R 305 The groups shown in the figure,

[0869] -N(R 306 (R) 307 The groups shown in the figure,

[0870] -B(R 308 (R) 309 The groups shown in the figure,

[0871] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[0872] cyano, or

[0873] Halogen atoms.

[0874] The compound represented by formula (D-b1) above is equivalent to Z in formula (Db) above.1 Compounds that are greater than S.

[0875] The compound represented by formula (D-b2) above is equivalent to Z in formula (Db) above. 1 Compounds that are >0.

[0876] The compound represented by formula (D-b3) above is equivalent to Z in formula (Db) above. 1 >C(-R) CZ )2 and 2 R CZ Compounds in which the methyl group is present.

[0877] The compound represented by the above formula (D-c1) is equivalent to m being 0 and -(Y) in the above formula (Dc). 1 )0- is an example of a compound that does not involve a single bond or linking group connecting ring f to ring b. As with the compound shown in formula (D-c1) above, when m in formula (Dc) is 0, there is no connection via Y. 1 The bonding between ring f and ring b.

[0878] The compounds represented by formula (D-c2) or (D-c4) above are equivalent to those in formula (Dc) where m is 1 and Y is 1. 1 An example of a compound with a single bond.

[0879] The compound represented by formula (D-c3) above is equivalent to the compound in formula (Dc) above where m is 1 and Y is 1. 1 >C(-R) Y Compounds at 2°C.

[0880] In the organic EL element involved in this embodiment, it is also preferred that the first dopant material is a compound represented by the following formula (D-d1), formula (D-d2), formula (D-d3) or formula (D-d4).

[0881]

[0882]

[0883]

[0884]

[0885] (In the above formulas (D-d1) to (D-d4),

[0886] R a1 ~R a3 R b1 ~R b4 R c1 ~R c4 R g1 ~Rg5 The meanings of Ar1 and Ar2 are independently related to R in the above formula (Dd). a1 ~R a3 R b1 ~R b4 R c1 ~R c4 R g1 ~R g5 Ar1 and Ar2 have the same meaning.

[0887] By R h1 ~R h8 One or more groups consisting of two or more adjacent elements.

[0888] They bond together to form substituted or unsubstituted monocyclic rings.

[0889] They bond together to form substituted or unsubstituted fused rings, or

[0890] They do not bond with each other.

[0891] R does not form the aforementioned substituted or unsubstituted monocyclic rings and does not form the aforementioned substituted or unsubstituted fused rings. h1 ~R h8 Each independently

[0892] hydrogen atom,

[0893] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms

[0894] Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms

[0895] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[0896] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[0897] -Si(R 301 (R) 302 (R) 303 The groups shown in the figure,

[0898] -O-(R 304 The groups shown in the figure,

[0899] -S-(R 305 The groups shown in the figure,

[0900] -N(R 306 (R) 307 The groups shown in the figure,

[0901] -B(R 308 (R) 309 The groups shown in the figure,

[0902] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[0903] cyano, or

[0904] Halogen atoms.

[0905] The compound represented by the above formula (D-d1) is equivalent to m being 0 and -(Y) in the above formula (Dd). 1 )0- is an example of a compound that does not involve a single bond or linking group connecting ring f to ring b. As with the compound shown in formula (D-d1) above, when m in formula (Dd) is 0, there is no connection via Y. 1 The bonding between ring f and ring b.

[0906] The compounds represented by formula (D-d2) or (D-d4) above are equivalent to those in formula (Dd) where m is 1 and Y is 1. 1 An example of a compound with a single bond.

[0907] The compound represented by the above formula (D-d3) is equivalent to m being 1 and Y being 1 in the above formula (Dd). 1 >C(-R) Y Compounds at 2°C.

[0908] In the organic EL element of this embodiment, it is preferred that the substituent in the first dopant material, when described as "substituted or unsubstituted", is an unsubstituted alkyl group having 1 to 18 carbon atoms, an unsubstituted cycloalkyl group having 3 to 18 cyclic carbon atoms, an unsubstituted aryl group having 6 to 18 cyclic carbon atoms, or an unsubstituted heterocyclic group having 5 to 18 cyclic atoms.

[0909] In the organic EL element involved in this embodiment, it is also preferred that the substituent in the first dopant material, when described as "substituted or unsubstituted", is an unsubstituted alkyl group having 1 to 6 carbon atoms, an unsubstituted cycloalkyl group having 3 to 10 cyclic carbon atoms, an unsubstituted aryl group having 6 to 12 cyclic carbon atoms, or an unsubstituted heterocyclic group having 5 to 13 cyclic atoms.

[0910] In the organic EL element involved in this embodiment, it is also preferred that the groups described as "substituted or unsubstituted" in the first dopant material are all "unsubstituted" groups.

[0911] In the organic EL element involved in this embodiment, it is also preferred that the first dopant material is a compound that does not contain an azazine ring structure in its molecule.

[0912] In the organic EL element involved in this embodiment, the first dopant material is preferably not a boron-containing complex, and more preferably not a complex.

[0913] In the organic EL element involved in this embodiment, it is preferred that the first dopant material is a compound that exhibits luminescence with a maximum peak wavelength of 430 nm or more and 480 nm or less.

[0914] In the organic EL element involved in this embodiment, it is preferred that the first dopant material is a compound that exhibits luminescence with a maximum peak wavelength of less than 475 nm.

[0915] In the organic EL element involved in this embodiment, it is preferred that the first dopant material is a compound that exhibits luminescence with a maximum peak wavelength of 440 nm or higher.

[0916] In the organic EL element involved in this embodiment, it is preferred that the first dopant material is a fluorescent compound.

[0917] (Maximum peak wavelength)

[0918] The maximum peak wavelength of the compounds described in this specification can be determined by measuring the PL spectrum of a film containing the compound under test. The specific method for determining the maximum peak wavelength is shown below.

[0919] A dopant material (the compound used for measuring the maximum peak wavelength) and a host material are co-deposited onto a quartz substrate (25×25 mm) such that the mass ratio (dopant material / host material) of the dopant material contained in the emitting layer to the host material is the same, thereby forming a film measurement sample with a film thickness of 50 nm. Next, the quartz substrate with the film measurement sample is bonded to a sealing glass coated with a desiccant using a UV-curable resin to seal the film measurement sample. The sealing glass has external dimensions of 17×17 mm, internal dimensions of 13×13 mm, and a depth of 0.5 mm. For example, OleDry-P2 manufactured by Futaba Electronics Industry Co., Ltd. can be used as the desiccant. For example, TB3124N(IE) manufactured by Threebond Fine Chemical Co., Ltd. can be used as the UV-curable resin.

[0920] PL spectroscopy measurements were performed using a fluorescence spectroscopy apparatus. The measurement conditions are as follows. The maximum peak wavelength λ (in nm) of the film was calculated from the PL spectrum obtained by exciting the sample to be measured with a specific wavelength (a value shortened by subtracting 30 nm from the maximum peak wavelength of the absorption spectrum). This maximum peak wavelength is sometimes referred to as the maximum peak wavelength of fluorescence emission (FL-peak). For example, a spectrophotometer F-7000 (manufactured by Hitachi High Technology Scientific Co., Ltd.) can be used as the fluorescence spectroscopy apparatus. It should be noted that the maximum peak wavelength of the absorption spectrum used to determine the wavelength of light used to excite the sample to be measured can be determined using the method described above for measuring the singlet energy S1 of the solution (solution method). In this solution method, a toluene solution of the compound (dopane material) to be measured is prepared, and the absorption spectrum of this toluene solution is measured.

[0921] The method for determining the maximum peak wavelength of a compound is as follows. First, the compound to be measured is subjected to a wavelength of 10... -6 mol / L or higher and 10 -5 A toluene solution (sample for determination) is prepared by dissolving the sample in toluene at a concentration of less than mol / L. This toluene solution is then added to a quartz cuvette, and the emission spectrum of the sample is measured at room temperature (300 K). The vertical axis of the emission spectrum represents the emission intensity, and the horizontal axis represents the wavelength. The maximum peak wavelength of the compound is the peak wavelength of the emission spectrum at which the emission intensity reaches its maximum. The emission spectrum can be measured using a spectrophotometer (device name: F-7000) manufactured by Hitachi Advanced Scientific Corporation. It should be noted that the apparatus used for measuring emission spectra is not limited to the one used here.

[0922] (Second dopant material)

[0923] In the organic EL element involved in this embodiment, the first dopant material and the second dopant material may be the same as or different from each other.

[0924] In the organic EL device according to this embodiment, the second dopant material is a compound containing one or more boron atoms. One embodiment of the second dopant material is a compound containing one or more but less than five boron atoms. Another embodiment of the second dopant material is a compound containing one or more but less than three boron atoms. A third embodiment of the second dopant material is a compound containing one or two boron atoms. A fourth embodiment of the second dopant material is a compound containing one boron atom.

[0925] In the organic EL element of this embodiment, it is preferred that the second dopant material is a compound selected from the group of polycyclic aromatic compounds represented by the above formula (DX).

[0926] In the organic EL element involved in this embodiment, it is preferred that the second dopant material is a compound represented by the above formula (Da), formula (Db), formula (Dc), formula (Dd), formula (De), formula (Df), formula (Dg), formula (Dh), formula (Di), formula (Dj), or formula (Dk).

[0927] In the organic EL element involved in this embodiment, it is also preferred that the second dopant material is a compound shown in formula (D-a1), formula (D-a2), formula (D-a3), formula (D-a4), formula (D-a5), formula (D-a6) or formula (D-a7).

[0928] In the organic EL element involved in this embodiment, it is also preferred that the second dopant material is a compound represented by the above formula (D-b1), formula (D-b2) or formula (D-b3).

[0929] In the organic EL element involved in this embodiment, it is also preferred that the second dopant material is a compound shown in the above formula (D-c1), formula (D-c2), formula (D-c3) or formula (D-c4).

[0930] In the organic EL element involved in this embodiment, it is also preferred that the second dopant material is a compound shown in the above formula (D-d1), formula (D-d2), formula (D-d3) or formula (D-d4).

[0931] In the organic EL element involved in this embodiment, it is preferred that the second dopant material is a compound that exhibits luminescence with a maximum peak wavelength of 430 nm or more and 480 nm or less.

[0932] In the organic EL element involved in this embodiment, it is preferred that the second dopant material is a compound that exhibits luminescence with a maximum peak wavelength of less than 475 nm.

[0933] In the organic EL element involved in this embodiment, it is preferred that the second dopant material is a compound that exhibits luminescence with a maximum peak wavelength of 440 nm or higher.

[0934] In the organic EL element involved in this embodiment, it is preferred that the second dopant material is a fluorescent compound.

[0935] In the organic EL element involved in this embodiment, it is also preferred that the second dopant material is a compound that does not contain an azazine ring structure in its molecule.

[0936] In the organic EL element involved in this embodiment, the second dopant material is preferably not a boron-containing complex, and more preferably not a complex.

[0937] In the organic EL element according to this embodiment, it is also preferred that the first dopant material is a compound selected from any of the group consisting of (D-a1) to (D-a7), and the second dopant material is a compound selected from any of the group consisting of (D-a1) to (D-a7); or,

[0938] The first dopant material is a compound selected from any of the formulas (D-a1) to (D-a7), and the second dopant material is a compound selected from any of the formulas (D-b1) to (D-b3); or,

[0939] The first dopant material is a compound selected from any of the formulas (D-a1) to (D-a7), and the second dopant material is a compound selected from any of the formulas (D-c1) to (D-c4); or,

[0940] The first dopant material is a compound selected from any of the formulas (D-a1) to (D-a7), and the second dopant material is a compound selected from any of the formulas (D-d1) to (D-d4); or,

[0941] The first dopant material is a compound selected from any of the formulas (D-a1) to (D-a7), and the second dopant material is a compound represented by formula (De) or formula (Df).

[0942] In the organic EL element according to this embodiment, it is also preferred that the first dopant material is a compound selected from the group consisting of (D-b1) to (D-b3), and the second dopant material is a compound selected from the group consisting of (D-a1) to (D-a7); or,

[0943] The first dopant material is a compound selected from any one of the formulas (D-b1) to (D-b3), and the second dopant material is a compound selected from any one of the formulas (D-b1) to (D-b3); or,

[0944] The first dopant material is a compound selected from any of the formulas (D-b1) to (D-b3), and the second dopant material is a compound selected from any of the formulas (D-c1) to (D-c4); or,

[0945] The first dopant material is a compound selected from any of the formulas (D-b1) to (D-b3), and the second dopant material is a compound selected from any of the formulas (D-d1) to (D-d4); or,

[0946] The first dopant material is a compound selected from any of the formulas (D-b1) to (D-b3), and the second dopant material is a compound represented by formula (De) or formula (Df).

[0947] In the organic EL element according to this embodiment, it is also preferred that the first dopant material is a compound selected from any of the group consisting of (D-c1) to (D-c4), and the second dopant material is a compound selected from any of the group consisting of (D-a1) to (D-a7); or,

[0948] The first dopant material is a compound selected from any of the formulas (D-c1) to (D-c4), and the second dopant material is a compound selected from any of the formulas (D-b1) to (D-b3); or,

[0949] The first dopant material is a compound selected from any one of the formulas (D-c1) to (D-c4), and the second dopant material is a compound selected from any one of the formulas (D-c1) to (D-c4); or,

[0950] The first dopant material is a compound selected from any of the formulas (D-c1) to (D-c4), and the second dopant material is a compound selected from any of the formulas (D-d1) to (D-d4); or,

[0951] The first dopant material is a compound selected from any of the formulas (D-c1) to (D-c4), and the second dopant material is a compound represented by formula (De) or formula (Df).

[0952] In the organic EL element according to this embodiment, it is also preferred that the first dopant material is a compound selected from any of the group consisting of (D-d1) to (D-d4), and the second dopant material is a compound selected from any of the group consisting of (D-a1) to (D-a7); or,

[0953] The first dopant material is a compound selected from any of the formulas (D-d1) to (D-d4), and the second dopant material is a compound selected from any of the formulas (D-b1) to (D-b3); or,

[0954] The first dopant material is a compound selected from any of the formulas (D-d1) to (D-d4), and the second dopant material is a compound selected from any of the formulas (D-c1) to (D-c4); or,

[0955] The first dopant material is a compound selected from any one of the formulas (D-d1) to (D-d4), and the second dopant material is a compound selected from any one of the formulas (D-d1) to (D-d4); or,

[0956] The first dopant material is a compound selected from any of the formulas (D-d1) to (D-d4), and the second dopant material is a compound represented by formula (De) or formula (Df).

[0957] In the organic EL element according to this embodiment, it is also preferred that the first dopant material is a compound represented by formula (De) or formula (Df), and the second dopant material is a compound selected from the group consisting of formulas (D-a1) to (D-a7); or,

[0958] The first dopant material is a compound represented by formula (De) or formula (Df), and the second dopant material is a compound selected from any of the group consisting of formulas (D-b1) to (D-b3); or,

[0959] The first dopant material is a compound represented by formula (De) or formula (Df), and the second dopant material is a compound selected from the group consisting of formulas (D-c1) to (D-c4); or,

[0960] The first dopant material is a compound represented by formula (De) or formula (Df), and the second dopant material is a compound selected from any of the group consisting of formulas (D-d1) to (D-d4); or,

[0961] The first dopant material is a compound represented by formula (De) or formula (Df), and the second dopant material is a compound represented by formula (De) or formula (Df).

[0962] In the organic EL element involved in this embodiment, -O-(R) is also preferred. 304The R in the group shown in the figure 304 It is an alkyl group with 1 to 50 carbon atoms, either substituted or unsubstituted, or an aryl group with 6 to 50 carbon atoms, either substituted or unsubstituted.

[0963] In the organic EL element involved in this embodiment, -S-(R) is also preferred. 305 The R in the group shown in the figure 305 It is an alkyl group with 1 to 50 carbon atoms, either substituted or unsubstituted, or an aryl group with 6 to 50 carbon atoms, either substituted or unsubstituted.

[0964] In the organic EL element involved in this embodiment, -N(R) is also preferred. 306 (R) 307 The R in the group shown in the figure 306 and R 307 Each is independently an aryl group with 6 to 50 cyclic carbon atoms, either substituted or unsubstituted, or a heterocyclic group with 5 to 50 cyclic atoms, either substituted or unsubstituted.

[0965] In the organic EL element involved in this embodiment, -B(R) is also preferred. 308 (R) 309 The R in the group shown in the figure 308 and R 309 Each is an aryl group, either substituted or unsubstituted, with 6 to 50 carbon atoms in a cyclic structure.

[0966] In the organic EL element involved in this embodiment, it is preferred that the substituent in the second dopant material, when described as "substituted or unsubstituted", is an unsubstituted alkyl group having 1 to 18 carbon atoms, an unsubstituted cycloalkyl group having 3 to 18 cyclic carbon atoms, an unsubstituted aryl group having 6 to 18 cyclic carbon atoms, or an unsubstituted heterocyclic group having 5 to 18 cyclic atoms.

[0967] In the organic EL element involved in this embodiment, it is also preferred that the substituent in the second dopant material, when described as "substituted or unsubstituted", is an unsubstituted alkyl group having 1 to 6 carbon atoms, an unsubstituted cycloalkyl group having 3 to 10 cyclic carbon atoms, an unsubstituted aryl group having 6 to 12 cyclic carbon atoms, or an unsubstituted heterocyclic group having 5 to 13 cyclic atoms.

[0968] In the organic EL element involved in this embodiment, it is also preferred that the groups described as "substituted or unsubstituted" in the second dopant material are all "unsubstituted" groups.

[0969] In the organic EL element of this embodiment, it is preferable that the HOMO(D1) of the first dopant material is greater than the HOMO(D2) of the second dopant material. The HOMO(D1) of the first dopant material and the HOMO(D2) of the second dopant material preferably satisfy the following mathematical expression (Mathematical Expression 20).

[0970] HOMO(D1)>HOMO(D2) …(Mathematical expression 20)

[0971] By satisfying the relationship of mathematical formula (Mathematical Formula 20), a first dopant material with a shallow HOMO (high HOMO energy level) is contained in the first light-emitting layer, and a second dopant material with a deeper HOMO (low HOMO energy level) is contained in the second light-emitting layer compared to the first dopant material, thereby making it easy to realize an organic EL device that emits light with high efficiency and long lifetime.

[0972] In the organic EL element of this embodiment, the HOMO(D1) of the first dopant material and the HOMO(D2) of the second dopant material preferably satisfy the following mathematical formula (mathematical formula 2C), and more preferably satisfy the following mathematical formula (mathematical formula 21).

[0973] HOMO(D1) - HOMO(D2) > 0.25 eV … (Mathematical expression 2C)

[0974] HOMO(D1)-HOMO(D2)≥0.28eV …(Mathematical Expression 21)

[0975] In the organic EL element of this embodiment, it is preferable that the HOMO(D1) of the first dopant material and the HOMO(D2) of the second dopant material satisfy the following mathematical formula (Mathematical Formula 22).

[0976] HOMO(D1)-HOMO(D2)≤0.50eV …(Mathematical Equation 22)

[0977] In one embodiment of the organic EL element, it is preferred that the HOMO (H1) of the first host material, the HOMO (D1) of the first dopant material, the HOMO (H2) of the second host material, and the HOMO (D2) of the second dopant material satisfy the following mathematical formula (Mathematical Formula 3A) or the following mathematical formula (Mathematical Formula 3D).

[0978] HOMO(D1)-HOMO(H1)>HOMO(D2)-HOMO(H2)…(Mathematical formula 3A)

[0979] HOMO(D1)-HOMO(H1)<HOMO(D2)-HOMO(H2)…(Mathematical formula 3D)

[0980] In the organic EL element of this embodiment, it is preferable that the HOMO(H1) of the first host material and the HOMO(D1) of the first dopant material satisfy the following mathematical formula (Mathematical Formula 3B).

[0981] HOMO(D1)-HOMO(H1)<0.80eV …(Mathematical formula 3B)

[0982] In the organic EL element of this embodiment, it is preferable that the HOMO(H2) of the second host material and the HOMO(D2) of the second dopant material satisfy the following mathematical formula (mathematical formula 3C).

[0983] HOMO(D2)-HOMO(H2)<0.50eV …(Mathematical formula 3C)

[0984] (Manufacturing methods for the first and second dopant materials)

[0985] The first and second dopant materials can be manufactured using known methods. Alternatively, the first and second dopant materials can also be manufactured by using known alternative reactions and raw materials corresponding to the target material, following known methods.

[0986] (Specific examples of the first dopant material and the second dopant material)

[0987] Specific examples of the first and second dopant materials include the following compounds. However, the present invention is not limited to these specific examples of the first and second dopant materials.

[0988]

[0989]

[0990]

[0991]

[0992]

[0993]

[0994]

[0995]

[0996]

[0997]

[0998]

[0999]

[1000]

[1001]

[1002]

[1003]

[1004]

[1005]

[1006]

[1007]

[1008]

[1009]

[1010]

[1011]

[1012]

[1013]

[1014]

[1015]

[1016]

[1017]

[1018]

[1019]

[1020]

[1021]

[1022]

[1023]

[1024]

[1025]

[1026]

[1027]

[1028]

[1029]

[1030]

[1031]

[1032]

[1033]

[1034]

[1035]

[1036]

[1037]

[1038]

[1039]

[1040]

[1041]

[1042]

[1043]

[1044]

[1045]

[1046] (First main material and second main material)

[1047] In the organic EL element involved in this embodiment, the first host material and the second host material are different compounds.

[1048] (First main material)

[1049] In the organic EL element involved in this embodiment, the first host material is a compound represented by the following formula (H1-1) or formula (H1-2).

[1050] In the organic EL element involved in this embodiment, it is also preferred that the first host material is a compound represented by the following formula (H1-1).

[1051]

[1052] (In the above formula (H1-1),

[1053] R 150 ~R 159 Each independently

[1054] hydrogen atom,

[1055] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[1056] Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms

[1057] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[1058] Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms

[1059] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[1060] -Si(R 901 (R) 902 (R) 903 The groups shown in the figure,

[1061] -O-(R 904 The groups shown in the figure,

[1062] -S-(R 905 The groups shown in the figure,

[1063] Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms

[1064] -C(=O)R 801 The groups shown

[1065] -COOR 802 The groups shown

[1066] Halogen atoms,

[1067] cyano,

[1068] Nitro,

[1069] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms

[1070] Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms, or

[1071] The group represented by the above formula (H150),

[1072] Among them, R 150 ~R 159 At least one of them is a group represented by the above formula (H150).

[1073] When multiple groups represented by the above formula (H150) are present, the multiple groups represented by the above formula (H150) may be the same as or different from each other.

[1074] L 151 for

[1075] Substituted or unsubstituted arylene groups with 6 to 50 carbon atoms, or

[1076] Divalent heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1077] Ar 151 for

[1078] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1079] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1080] mg is 0, 1, 2, 3, 4 or 5,

[1081] When mg is 0, -(L 151 )0- indicates a single bond,

[1082] In L 151 When there are more than two, more than two L 151 They are the same or different.

[1083] In Ar 151 When there are more than two, more than two Ar 151 They are the same or different.

[1084] In the above formula (H150), * indicates the bonding location.

[1085] (In the aforementioned first main material, R) 901 ~R 905 R 801 and R 802 Each independently

[1086] hydrogen atom,

[1087] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[1088] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[1089] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1090] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1091] In R 901 When multiple R exist, multiple R 901 They are the same or different.

[1092] In R 902 When multiple R exist, multiple R 902 They are the same or different.

[1093] In R 903 When multiple R exist, multiple R 903 They are the same or different.

[1094] In R 904 When multiple R exist, multiple R 904 They are the same or different.

[1095] In R 905 When multiple R exist, multiple R 905 They are the same or different.

[1096] In R 801 When multiple R exist, multiple R 801 They are the same or different.

[1097] In R 802 When multiple R exist, multiple R 802 (They may be the same or different.)

[1098] In the above formula (H150), mg is preferably 0, 1 or 2, more preferably 0 or 1.

[1099] In the above formula (H150), L 151 Preferably, it is a substituted or unsubstituted aryl group with 6 to 14 cyclic carbons, more preferably a substituted or unsubstituted aryl group with 6 to 12 cyclic carbons.

[1100] In the above formula (H150), L 151 It is also preferred to use substituted or unsubstituted phenylene, substituted or unsubstituted biphenylene, or substituted or unsubstituted naphthylene.

[1101] In the above formula (H150), Ar 151Preferably, it is anthraquinone, benzo[a]anthraquinone, phenanthrene, benzo[a]phenanthrene, finadenoyl, pyrene, benzo[a]pyrene, triphenylenyl, benzo[a]triphenylenyl, tetraphenyl, pentaphenyl, fluorenyl, or 9,9'- Spirobisfluorenyl, substituted or unsubstituted benzo[fluorenyl], substituted or unsubstituted dibenzo[fluorenyl], substituted or unsubstituted fluoranthyl, substituted or unsubstituted benzo[fluoranthyl], substituted or unsubstituted peryl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted naphthobenzofuranyl, substituted or unsubstituted dinaphthofuranyl, substituted or unsubstituted benzoxanthryl, substituted or unsubstituted dibenzothiophenyl, substituted or unsubstituted naphthobenzothiophenyl, substituted or unsubstituted dinaphthothiophenyl, or substituted or unsubstituted benzothiophenyl.

[1102] In the above formula (H150), Ar 151 More preferably, it is substituted or unsubstituted benzo[anthracene], substituted or unsubstituted pyrene, substituted or unsubstituted dibenzofuran, substituted or unsubstituted naphthobenzofuran, substituted or unsubstituted benzoxanthanyl, substituted or unsubstituted dibenzothiophene, substituted or unsubstituted naphthobenzothiophene, or substituted or unsubstituted benzothiophene.

[1103] In the organic EL element involved in this embodiment, it is also preferred that the first host material is a compound represented by the following formula (H152).

[1104]

[1105] (In the above formula (H152),

[1106] R 150 ~R 152 and R 154 ~R 159 Each independently

[1107] hydrogen atom,

[1108] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[1109] Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms

[1110] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[1111] Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms

[1112] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[1113] -Si(R 901 (R) 902 (R) 903 The groups shown in the figure,

[1114] -O-(R 904 The groups shown in the figure,

[1115] -S-(R 905 The groups shown in the figure,

[1116] Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms

[1117] -C(=O)R 801 The groups shown

[1118] -COOR 802 The groups shown

[1119] Halogen atoms,

[1120] cyano,

[1121] Nitro,

[1122] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1123] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1124] X 15 It consists of oxygen or sulfur atoms.

[1125] L 151 The meanings of and mg are respectively the same as L in the above formula (H150). 151 It has the same meaning as mg.

[1126] By R 1500 ~R 1504 One or more groups consisting of two or more adjacent elements.

[1127] They bond together to form substituted or unsubstituted monocyclic rings.

[1128] They bond together to form substituted or unsubstituted fused rings, or

[1129] They do not bond with each other.

[1130] R does not form the aforementioned substituted or unsubstituted monocyclic rings and does not form the aforementioned substituted or unsubstituted fused rings. 1500 ~R 1504 Each independently

[1131] hydrogen atom,

[1132] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[1133] Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms

[1134] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[1135] Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms

[1136] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[1137] -Si(R 901 (R) 902 (R) 903 The groups shown in the figure,

[1138] -O-(R 904 The groups shown in the figure,

[1139] -S-(R 905 The groups shown in the figure,

[1140] Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms

[1141] -C(=O)R 801 The groups shown

[1142] -COOR 802 The groups shown

[1143] Halogen atoms,

[1144] cyano,

[1145] Nitro,

[1146] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1147] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1148] Multiple R 1500 (They may be the same or different.)

[1149] (In the compound represented by the above formula (H152), R) 901 ~R 905 R 801 and R 802 The meanings are respectively related to R in the above formula (H1-1) 901 ~R 905 R 801 and R 802 The meanings are the same.

[1150] In the organic EL element involved in this embodiment, it is also preferred that the first host material is a compound represented by the following formula (H153) or formula (H154).

[1151]

[1152]

[1153] (In the above formula (H153) or formula (H154),

[1154] R 150 ~R 152 and R 154 ~R 159 The meanings are respectively related to R in the above formula (H1-1) 150 ~R 152 and R 154 ~R 159 The meaning is the same.

[1155] L 151 The meanings of and mg are respectively the same as L in the above formula (H150). 151 It has the same meaning as mg.

[1156] X 3 It consists of oxygen or sulfur atoms.

[1157] R 1510 ~R 1517 and R 1520 ~R 1526 Each independently

[1158] hydrogen atom,

[1159] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[1160] Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms

[1161] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[1162] Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms

[1163] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[1164] -Si(R 901 (R) 902 (R) 903 The groups shown in the figure,

[1165] -O-(R 904 The groups shown in the figure,

[1166] -S-(R 905The groups shown in the figure,

[1167] Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms

[1168] -C(=O)R 801 The groups shown

[1169] -COOR 802 The groups shown

[1170] Halogen atoms,

[1171] cyano,

[1172] Nitro,

[1173] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1174] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1175] Multiple R 1510 They are the same or different.

[1176] Multiple R 1520 (They may be the same or different.)

[1177] (In the compounds shown in formula (H153) or formula (H154) above, R 901 ~R 905 R 801 and R 802 The meanings are respectively related to R in the above formula (H1-1) 901 ~R 905 R 801 and R 802 The meanings are the same.

[1178] In the organic EL element involved in this embodiment, it is also preferred that the first host material is a compound represented by the following formula (H1-2).

[1179]

[1180] (In the above formula (H1-2),

[1181] R 131 ~R 140 Ar 131 and Ar 132 Each independently

[1182] hydrogen atom,

[1183] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[1184] Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms

[1185] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[1186] Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms

[1187] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[1188] -Si(R 901 (R) 902 (R) 903 The groups shown in the figure,

[1189] -O-(R 904 The groups shown in the figure,

[1190] -S-(R 905 The groups shown in the figure,

[1191] Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms

[1192] -C(=O)R 801 The groups shown

[1193] -COOR 802 The groups shown

[1194] Halogen atoms,

[1195] cyano,

[1196] Nitro,

[1197] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms

[1198] Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms, or

[1199] The group represented by the above formula (H131),

[1200] Among them, R 131 ~R 140 Ar 131 and Ar 132 At least one of them is a group represented by the above formula (H131),

[1201] When multiple groups represented by the above formula (H131) are present, the multiple groups represented by the above formula (H131) may be the same as or different from each other.

[1202] L 13 for

[1203] Substituted or unsubstituted arylene groups with 6 to 50 carbon atoms, or

[1204] Divalent heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1205] Ar 13 for

[1206] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1207] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1208] mb can be 0, 1, 2, 3, 4, or 5.

[1209] When mb is 0, -(L 13 )0- indicates a single bond,

[1210] In L 13 When there are more than two, more than two L 13 They are the same or different.

[1211] In Ar 13 When there are more than two, more than two Ar 13 They are the same or different.

[1212] In the above formula (H131), * indicates the bonding location.

[1213] (In the aforementioned first main material, R) 901 ~R 905 R 801 and R 802 Each independently

[1214] hydrogen atom,

[1215] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[1216] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[1217] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1218] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1219] In R 901 When multiple R exist, multiple R 901 They are the same or different.

[1220] In R 902 When multiple R exist, multiple R 902 They are the same or different.

[1221] In R 903 When multiple R exist, multiple R 903 They are the same or different.

[1222] In R 904 When multiple R exist, multiple R 904 They are the same or different.

[1223] In R 905 When multiple R exist, multiple R 905 They are the same or different.

[1224] In R 801 When multiple R exist, multiple R 801 They are the same or different.

[1225] In R 802 When multiple R exist, multiple R 802 (They may be the same or different.)

[1226] In the organic EL element involved in this embodiment, it is also preferred that the first host material is a compound represented by the following formula (H132) or formula (H133).

[1227]

[1228] (In the above equations (H132) and (H133),

[1229] R 131 ~R 140 Ar 131 and Ar 132 Each independently

[1230] hydrogen atom,

[1231] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[1232] Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms

[1233] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[1234] Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms

[1235] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[1236] -Si(R 901 (R) 902 (R) 903 The groups shown in the figure,

[1237] -O-(R 904 The groups shown in the figure,

[1238] -S-(R 905 The groups shown in the figure,

[1239] Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms

[1240] -C(=O)R 801 The groups shown

[1241] -COOR 802 The groups shown

[1242] Halogen atoms,

[1243] cyano,

[1244] Nitro,

[1245] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1246] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1247] L 13 Ar 13 The meanings of and mb are respectively the same as L in the above formula (H131). 13 Ar 13 (Same meaning as mb.)

[1248] (In the compounds shown in formula (H132) and (H133) above, R) 901 ~R 905 R 801 and R 802 The meanings are respectively related to R in the compounds shown in formula (H1-2) above. 901 ~R 905 R 801 and R 802 The meanings are the same.

[1249] In the above formulas (H131), (H132) and (H133), mb is preferably 0, 1 or 2, more preferably 0 or 1.

[1250] In the above equations (H131), (H132) and (H133), it is also preferable that mb is 0.

[1251] In the above equations (H131), (H132), and (H133), L 13 Preferably, it is a substituted or unsubstituted aryl group with 6 to 14 cyclic carbons, more preferably a substituted or unsubstituted aryl group with 6 to 12 cyclic carbons.

[1252] In the above equations (H131), (H132), and (H133), L 13 It is also preferred to use substituted or unsubstituted phenylene, substituted or unsubstituted biphenylene, or substituted or unsubstituted naphthylene.

[1253] In the above equations (H131), (H132), and (H133), Ar 13 Preferably, it is substituted or unsubstituted benzo[a]anthrayl, substituted or unsubstituted phenanthryl, substituted or unsubstituted benzo[a]phenanthryl, substituted or unsubstituted finatenyl, substituted or unsubstituted pyrene, substituted or unsubstituted hydroxyl, substituted or unsubstituted benzo[a]hydroxyl, substituted or unsubstituted triphenylenyl, substituted or unsubstituted benzo[a]triphenylenyl, substituted or unsubstituted tetraphenyl, substituted or unsubstituted pentaphenyl, substituted or unsubstituted fluorenyl, substituted or unsubstituted 9,9'-spirobisfluorenyl. Substituted or unsubstituted benzofluorenyl, substituted or unsubstituted dibenzofluorenyl, substituted or unsubstituted fluoranthyl, substituted or unsubstituted benzofluoranthyl, substituted or unsubstituted peryl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted naphthobenzofuranyl, substituted or unsubstituted dinaphthofuranyl, substituted or unsubstituted benzoxanthryl, substituted or unsubstituted dibenzothiophenyl, substituted or unsubstituted naphthobenzothiophenyl, substituted or unsubstituted dinaphthothiophenyl, or substituted or unsubstituted benzothiophenyl.

[1254] In the above equations (H131), (H132), and (H133), Ar 13 More preferably, it is substituted or unsubstituted benzo[anthracene], substituted or unsubstituted pyrene, substituted or unsubstituted dibenzofuran, substituted or unsubstituted naphthobenzofuran, substituted or unsubstituted benzoxanthanyl, substituted or unsubstituted dibenzothiophene, substituted or unsubstituted naphthobenzothiophene, or substituted or unsubstituted benzothiophene.

[1255] Ar in the above formula (H150) 151 Preferably, it is a group selected from any one of the following formulas (H141) to (H149).

[1256] Ar in equations (H131), (H132), and (H133) above 13 Preferably, it is a group selected from any one of the following formulas (H141) to (H149).

[1257]

[1258]

[1259]

[1260]

[1261] (In the above formulas (H141) to (H149),

[1262] X 4 It consists of oxygen or sulfur atoms.

[1263] From Rp1 to Rp 11 One or more groups consisting of two or more adjacent elements.

[1264] They bond together to form substituted or unsubstituted monocyclic rings.

[1265] They bond together to form substituted or unsubstituted fused rings, or

[1266] They do not bond with each other.

[1267] From Rq1 to Rq 11 One or more groups consisting of two or more adjacent elements.

[1268] They bond together to form substituted or unsubstituted monocyclic rings.

[1269] They bond together to form substituted or unsubstituted fused rings, or

[1270] They do not bond with each other.

[1271] One or more groups consisting of two or more adjacent numbers from Rr1 to Rr9.

[1272] They bond together to form substituted or unsubstituted monocyclic rings.

[1273] They bond together to form substituted or unsubstituted fused rings, or

[1274] They do not bond with each other.

[1275] One or more groups consisting of two or more adjacent numbers from Rs1 to Rs9.

[1276] They bond together to form substituted or unsubstituted monocyclic rings.

[1277] They bond together to form substituted or unsubstituted fused rings, or

[1278] They do not bond with each other.

[1279] One or more groups consisting of two or more adjacent elements from Rt1 to Rt8

[1280] They bond together to form substituted or unsubstituted monocyclic rings.

[1281] They bond together to form substituted or unsubstituted fused rings, or

[1282] They do not bond with each other.

[1283] From Ru1 to Ru 10 One or more groups consisting of two or more adjacent elements.

[1284] They bond together to form substituted or unsubstituted monocyclic rings.

[1285] They bond together to form substituted or unsubstituted fused rings, or

[1286] They do not bond with each other.

[1287] From Rv1 to Rv 10 One or more groups consisting of two or more adjacent elements.

[1288] They bond together to form substituted or unsubstituted monocyclic rings.

[1289] They bond together to form substituted or unsubstituted fused rings, or

[1290] They do not bond with each other.

[1291] From Rw1 to Rw 10 One or more groups consisting of two or more adjacent elements.

[1292] They bond together to form substituted or unsubstituted monocyclic rings.

[1293] They bond together to form substituted or unsubstituted fused rings, or

[1294] They do not bond with each other.

[1295] From Rx1 to Rx 10 One or more groups consisting of two or more adjacent elements.

[1296] They bond together to form substituted or unsubstituted monocyclic rings.

[1297] They bond together to form substituted or unsubstituted fused rings, or

[1298] They do not bond with each other.

[1299] Rp1 to Rp do not form the aforementioned substituted or unsubstituted monocyclic rings and do not form the aforementioned substituted or unsubstituted fused rings. 11 Rq1~Rq 11 , Rr1~Rr9, Rs1~Rs9, Rt1~Rt8, Ru1~Ru 10 Rv1~Rv 10 Rw1~Rw 10 and Rx1~Rx 10 Each independently

[1300] hydrogen atom,

[1301] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[1302] Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms

[1303] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[1304] Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms

[1305] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[1306] -Si(R 901 (R) 902 (R) 903 The groups shown in the figure,

[1307] -O-(R 904 The groups shown in the figure,

[1308] -S-(R 905 The groups shown in the figure,

[1309] Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms

[1310] -C(=O)R 801 The groups shown

[1311] -COOR 802 The groups shown

[1312] Halogen atoms,

[1313] cyano,

[1314] Nitro,

[1315] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1316] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1317] * indicates L in the above formula (H150) 151 The bonding position, or the L in the above formula (H131) 13 The bonding position,

[1318] Choose one from the group consisting of Rt1 to Rt8 to represent L in the above formula (H150). 151 The bonded single bond or the L in the above formula (H131) 13 Bonded single bonds,

[1319] Choose freely from Ru1 to Ru 10 One of the groups represents L in the above formula (H150). 151 The bonded single bond or the L in the above formula (H131) 13 Bonded single bonds,

[1320] Choose freely from Rv1 to Rv 10 One of the groups represents L in the above formula (H150). 151 The bonded single bond or the L in the above formula (H131) 13 Bonded single bonds,

[1321] Choose freely from Rw1 to Rw 10 One of the groups represents L in the above formula (H150). 151 The bonded single bond or the L in the above formula (H131) 13 Bonded single bonds,

[1322] Choose freely from Rx1 to Rx 10 One of the groups represents L in the above formula (H150). 151 The bonded single bond or the L in the above formula (H131) 13 A bonded single bond.

[1323] (in the above formulas (H141)~(H149) R) 901 ~R 905 R 801 and R 802 The meanings are respectively related to R in the above formula (H1-1) 901 ~R 905 R 801 and R 802 The meanings are the same.

[1324] In the organic EL element involved in this embodiment, it is also preferred that Ar in the above formula (H150) is... 151 And Ar in the above formulas (H131), (H132) and (H133) 13 For the sake of freedom of choice

[1325] Replaced or unreplaced pyrene skeleton,

[1326] Substituted or unsubstituted benzo[anthracene] skeleton,

[1327] Replaced or unreplaced skeletal frame

[1328] Substituted or unsubstituted benzoxanthine skeletons

[1329] Replaced or unreplaced skeleton,

[1330] Substituted or unsubstituted benzo[a]oxane skeleton,

[1331] Substituted or unsubstituted fluoranthene skeleton,

[1332] Substituted or unsubstituted benzo[a]fluoranthene skeleton,

[1333] Substituted or unsubstituted triphenylene skeleton,

[1334] Substituted or unsubstituted benzotriphenyl skeleton,

[1335] Replaced or unreplaced fin skeleton,

[1336] Substituted or unsubstituted benzo[n]phenanthrene skeleton,

[1337] Replaced or unreplaced phenanthrofuran skeleton,

[1338] Replaced or unreplaced fluorene skeleton,

[1339] Substituted or unsubstituted benzo[a]fluorene skeleton,

[1340] Substituted or unsubstituted dibenzofuran skeleton,

[1341] Substituted or unsubstituted naphthobenzofuran skeletons

[1342] Substituted or unsubstituted dinaphthofuran skeleton,

[1343] Substituted or unsubstituted dibenzothiophene skeleton,

[1344] Substituted or unsubstituted naphthobenzothiophene skeleton,

[1345] A skeleton-derived group in the group consisting of substituted or unsubstituted dinaphthothiophene skeleton and substituted or unsubstituted indolocarbazole skeleton.

[1346] In the organic EL element involved in this embodiment, it is also preferred that Ar in the above formula (H150) is... 151 And Ar in the above formulas (H131), (H132) and (H133) 13 For the sake of freedom of choice

[1347] Replaced or unreplaced pyrene skeleton,

[1348] Substituted or unsubstituted benzo[anthracene] skeleton,

[1349] Substituted or unsubstituted benzoxanthine skeletons

[1350] Substituted or unsubstituted triphenylene skeleton,

[1351] Substituted or unsubstituted benzotriphenyl skeleton,

[1352] Replaced or unreplaced fin skeleton,

[1353] Replaced or unreplaced phenanthrofuran skeleton,

[1354] Replaced or unreplaced fluorene skeleton,

[1355] Substituted or unsubstituted benzo[a]fluorene skeleton,

[1356] Substituted or unsubstituted dibenzofuran skeleton,

[1357] Substituted or unsubstituted naphthobenzofuran skeletons

[1358] Substituted or unsubstituted dinaphthofuran skeleton,

[1359] A skeleton-derived group in the group consisting of substituted or unsubstituted dibenzothiophene skeletons and substituted or unsubstituted indolocarbazole skeletons.

[1360] In the organic EL element involved in this embodiment, the substituted or unsubstituted fluorene skeleton is preferably 9,9-dimethylfluorene skeleton or 9,9-diphenylfluorene skeleton, the substituted or unsubstituted benzo[kl]xanthanene skeleton is preferably substituted or unsubstituted benzo[kl]xanthanene skeleton, the substituted or unsubstituted phenanthrofuran skeleton is preferably substituted or unsubstituted phenanthro[4,5-bcd]furan skeleton, and the substituted or unsubstituted indolocarbazole skeleton is preferably indolo[3,2,1-jk]carbazole skeleton.

[1361] In the organic EL element involved in this embodiment, it is preferred that the first host material is a compound having one or more deuterium ions.

[1362] In the organic EL element involved in this embodiment, it is preferred that the first host material is a compound with a deuteration rate of 50% or more, 60% or more, 70% or more, 80% or more, 90% or more, or 95% or more.

[1363] The deuteration rate of a compound can be based on the number N of deuterium atoms in the molecule of that compound. D The number N of protium atoms in the molecule of this compound. H And the total number of hydrogen atoms N in the molecule of this compound. A (=N D +N H ), use the following mathematical expression (mathematical expression W1) to perform the calculation. In the mathematical expression (mathematical expression W1), R D It indicates the deuteration rate of the compound.

[1364] R D =(N D / N A )×100 …(Mathematical expression W1)

[1365] In the organic EL element involved in this embodiment, it is also preferred that the substituent in the first host material, when described as "substituted or unsubstituted", is an unsubstituted alkyl group having 1 to 18 carbon atoms, an unsubstituted cycloalkyl group having 3 to 18 cyclic carbon atoms, an unsubstituted aryl group having 6 to 18 cyclic carbon atoms, or an unsubstituted heterocyclic group having 5 to 18 cyclic atoms.

[1366] In the organic EL element involved in this embodiment, it is also preferred that the substituent in the first host material, when described as "substituted or unsubstituted", is an unsubstituted alkyl group having 1 to 6 carbon atoms, an unsubstituted cycloalkyl group having 3 to 10 cyclic carbon atoms, an unsubstituted aryl group having 6 to 12 cyclic carbon atoms, or an unsubstituted heterocyclic group having 5 to 13 cyclic atoms.

[1367] In the organic EL element involved in this embodiment, it is also preferred that all groups in the first host material that are described as "substituted or unsubstituted" are "unsubstituted" groups.

[1368] (Manufacturing method of the first main material)

[1369] The first host material can be manufactured using known methods. Alternatively, the first host material can also be manufactured by following known methods, using known alternative reactions and raw materials corresponding to the target substance.

[1370] (Specific examples of the first main material)

[1371] Specific examples of the first host material include the following compounds. However, the present invention is not limited to these specific examples of the first host material.

[1372]

[1373]

[1374]

[1375]

[1376]

[1377]

[1378]

[1379]

[1380]

[1381]

[1382]

[1383]

[1384]

[1385]

[1386]

[1387]

[1388]

[1389]

[1390]

[1391]

[1392]

[1393]

[1394]

[1395]

[1396]

[1397]

[1398]

[1399]

[1400] (Second main material)

[1401] In the organic EL element of this embodiment, it is preferred that the second host material is a compound represented by the following formula (H2).

[1402]

[1403] (In the above formula (H2),

[1404] R 201 ~R 208 Each independently

[1405] hydrogen atom,

[1406] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[1407] Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms

[1408] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[1409] Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms

[1410] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[1411] -Si(R 901 (R) 902 (R) 903 The groups shown in the figure,

[1412] -O-(R 904 The groups shown in the figure,

[1413] -S-(R 905 The groups shown in the figure,

[1414] -N(R 906 (R) 907 The groups shown in the figure,

[1415] Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms

[1416] -C(=O)R 801 The groups shown

[1417] -COOR 802 The groups shown

[1418] Halogen atoms,

[1419] cyano,

[1420] Nitro,

[1421] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1422] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1423] By R 201 ~R 208 In this context, groups consisting of two or more adjacent elements are not bonded to each other.

[1424] L 201 and L 202 Each independently

[1425] single bond,

[1426] Substituted or unsubstituted arylene groups with 6 to 50 carbon atoms, or

[1427] Divalent heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1428] Ar 201 and Ar 202 Each independently

[1429] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1430] (Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms)

[1431] (In the second main material mentioned above, R) 901 ~R 907 R 801 and R 802 Each independently

[1432] hydrogen atom,

[1433] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[1434] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[1435] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1436] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1437] In R 901 When multiple R exist, multiple R 901 They are the same or different.

[1438] In R 902 When multiple R exist, multiple R 902 They are the same or different.

[1439] In R 903 When multiple R exist, multiple R 903 They are the same or different.

[1440] In R 904 When multiple R exist, multiple R 904 They are the same or different.

[1441] In R 905 When multiple R exist, multiple R 905 They are the same or different.

[1442] In R 906 When multiple R exist, multiple R 906 They are the same or different.

[1443] In R 907 When multiple R exist, multiple R 907 They are the same or different.

[1444] In R 801 When multiple R exist, multiple R 801 They are the same or different.

[1445] In R 802 When multiple R exist, multiple R 802 (They may be the same or different.)

[1446] In the organic EL element involved in this embodiment, it is preferred that R in the second host material is... 201 ~R 208 Each of the following is independently a hydrogen atom: substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms; substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms; substituted or unsubstituted cycloalkyl group having 3 to 50 carbon atoms; -Si(R 901 (R) 902 (R) 903 The group shown is -O-(R) 904 The group shown is -S-(R) 905 The group shown is -N(R) 906 (R) 907 The groups indicated by ) are substituted or unsubstituted aralkyl groups having 7 to 50 carbon atoms, and -C(=O)R 801 The indicated group, -COOR 802 The indicated groups, halogen atoms, cyano groups, or nitro groups,

[1447] L 201 and L 202 Each is independently a single bond, a substituted or unsubstituted aryl group with 6 to 50 carbon atoms in the cyclic ring, or a divalent heterocyclic group with 5 to 50 substituted or unsubstituted cyclic atoms.

[1448] Ar 201 and Ar 202 Each is independently an aryl group with 6 to 50 cyclic carbon atoms, either substituted or unsubstituted, or a heterocyclic group with 5 to 50 cyclic atoms, either substituted or unsubstituted.

[1449] In the organic EL element involved in this embodiment, it is also preferred that the L in the second host material is... 201 and L 202 Each is an arylene group, independently of a single bond, or substituted or unsubstituted, forming a cyclic group with 6 to 50 carbon atoms. 201 and Ar 202 Each is an aryl group, either substituted or unsubstituted, with 6 to 50 carbon atoms in a cyclic structure.

[1450] In the organic EL element involved in this embodiment, it is also preferred that the second host material contains Ar. 201 and Ar 202 Each independently

[1451] Substituted or unsubstituted phenyl

[1452] Substituted or unsubstituted naphthyl groups

[1453] Replaced or unreplaced foetida

[1454] Substituted or unsubstituted biphenyl,

[1455] Substituted or unsubstituted triphenyl,

[1456] Substituted or unsubstituted diphenylfluorenyl,

[1457] Substituted or unsubstituted dimethylfluorene,

[1458] Substituted or unsubstituted benzodiphenylfluorenyl,

[1459] Substituted or unsubstituted benzodimethylfluorenyl

[1460] Substituted or unsubstituted dibenzofuranyl,

[1461] Substituted or unsubstituted dibenzothiophene group,

[1462] Substituted or unsubstituted naphthobenzofuranyl, or

[1463] Substituted or unsubstituted naphthobenzothiophene group.

[1464] In the organic EL element involved in this embodiment, it is also preferred that the second host material is a compound shown in the following formulas (H201), (H202), (H203), (H204), (H205), (H206), (H207), (H208), or (H209).

[1465]

[1466]

[1467]

[1468]

[1469]

[1470] (In the above formulas (H201)~(H209), L 201 and Ar 201 respectively with L in the above formula (H2) 201 and Ar 201 The meanings are the same, R 201 ~R 208 respectively with R in the above formula (H2) 201 ~R 208 The meanings are the same.

[1471] In the organic EL element involved in this embodiment, it is preferred that R in the second host material is... 201 ~R 208Each is independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 carbon atoms, or a -Si(R) group. 901 (R) 902 (R) 903 The group shown is ).

[1472] In the organic EL element involved in this embodiment, it is also preferred that the L in the second host material is... 201 Ar is a single bond, or a substituted or unsubstituted cyclic aryl group with 6 to 22 carbon atoms. 201 It is an aryl group with 6 to 22 carbon atoms, either substituted or unsubstituted.

[1473] In the organic EL element involved in this embodiment, it is also preferred that the L in the second host material is... 201 Ar is a single bond, or a substituted or unsubstituted cyclic aryl group with 6 to 14 carbon atoms. 201 It is an aryl group with 6 to 14 carbon atoms, either substituted or unsubstituted.

[1474] In the organic EL element involved in this embodiment, it is also preferred that the L in the second host material is... 201 Ar is a single bond, or a substituted or unsubstituted cyclic aryl group with 6 to 12 carbon atoms. 201 It is an aryl group with 6 to 12 carbon atoms, either substituted or unsubstituted.

[1475] In the organic EL element involved in this embodiment, it is also preferred that the L in the second host material is... 201 Ar is a single bond, a substituted or unsubstituted phenylene group, or a substituted or unsubstituted naphthylene group. 201 It can be a substituted or unsubstituted phenyl group, or a substituted or unsubstituted naphthyl group.

[1476] In the organic EL element involved in this embodiment, it is preferred that the second host material contains Ar. 201 and Ar 202 At least one of them is represented by the following formula (H2a), more preferably, Ar 201 It is represented by the following formula (H2a).

[1477]

[1478] (In the above formula (H2a),

[1479] X 20 It consists of oxygen or sulfur atoms.

[1480] Selected from R 11 and R 12 group, R 12 and R 13 The group, and R13 and R 14 One group of the groups may bond with each other to form the ring shown in the above formula (H2aa), or they may not bond with each other.

[1481] In the above formula (H2aa), the asterisk (*) indicates the bond position with the above formula (H2a).

[1482] Choose R from the above equation (H2a) 11 ~R 18 and R in the above formula (H2aa) 21 ~R 24 One of the groups represents L 201 Bonded single bonds,

[1483] R is not a single bond 11 ~R 18 and R 21 ~R 24 Each independently

[1484] hydrogen atom,

[1485] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[1486] Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms

[1487] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[1488] Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms

[1489] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[1490] -Si(R 901 (R) 902 (R) 903 The groups shown in the figure,

[1491] -O-(R 904 The groups shown in the figure,

[1492] -S-(R 905 The groups shown in the figure,

[1493] -N(R 906 (R) 907 The groups shown in the figure,

[1494] Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms

[1495] -C(=O)R 801 The groups shown

[1496] -COOR 802 The groups shown

[1497] Halogen atom, cyano group, nitro group,

[1498] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1499] (Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms)

[1500] (In the above equations (H2a) and (H2aa), R) 901 ~R 907 R 801 and R 802 The meanings are respectively related to R in the above formula (H2). 901 ~R 907 R 801 and R 802 The meanings are the same.

[1501] In Ar 202 When expressed by the above formula (H2a), R is selected from the above formula (H2a). 11 ~R 18 and R in the above formula (H2aa) 21 ~R 24 One of the groups represents L 202 Bonded single bonds.

[1502] In the organic EL element involved in this embodiment, it is also preferred that the second host material is a compound represented by the following formula (H21).

[1503]

[1504] (In the above formula (H21),

[1505] R 201 ~R 208 Each independently

[1506] hydrogen atom,

[1507] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[1508] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1509] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1510] R 11 ~R 13 and R 15 ~R 18 Each independently

[1511] hydrogen atom,

[1512] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[1513] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1514] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1515] L 202 for

[1516] single bond,

[1517] Substituted or unsubstituted arylene groups with 6 to 50 carbon atoms, or

[1518] Divalent heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1519] Ar 202 for

[1520] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1521] (Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms)

[1522] In the organic EL element involved in this embodiment, it is preferred that the second host material contains Ar. 201 and Ar 202 At least one of them is represented by the following formula (H2b), preferably, Ar 201 It is represented by the following formula (H2b).

[1523]

[1524] (In the above formula (H2b),

[1525] X 21 It consists of oxygen or sulfur atoms.

[1526] R 31 ~R 38 Each independently

[1527] hydrogen atom,

[1528] Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms

[1529] Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms

[1530] Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms

[1531] Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms

[1532] Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms

[1533] -Si(R 901 (R) 902 (R) 903 The groups shown in the figure,

[1534] -O-(R 904 The groups shown in the figure,

[1535] -S-(R 905 The groups shown in the figure,

[1536] -N(R 906 (R) 907 The groups shown in the figure,

[1537] Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms

[1538] -C(=O)R 801 The groups shown

[1539] -COOR 802 The groups shown

[1540] Halogen atoms,

[1541] cyano,

[1542] Nitro,

[1543] Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or

[1544] Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted.

[1545] R 31 ~R 38 One of them represents L 201 A bonded single bond.

[1546] (In the above formula (H2b), R) 901 ~R 907 R 801 and R 802 The meanings are respectively related to R in the above formula (H2). 901 ~R 907 R 801 and R 802 The meanings are the same.

[1547] In Ar 202 When expressed by the above formula (H2b), R 31 ~R 38 One of them represents L 202 Bonded single bonds.

[1548] In the organic EL element involved in this embodiment, it is preferred that the second host material is a compound having one or more deuterium ions.

[1549] In the organic EL element of this embodiment, it is preferred that the first host material is a compound having one or more deuterium ions, and the second host material is a compound having one or more deuterium ions.

[1550] In the organic EL element involved in this embodiment, it is preferred that the second host material is a compound with a deuteration rate of 50% or more, 60% or more, 70% or more, 80% or more, 90% or more, or 95% or more.

[1551] In the organic EL element involved in this embodiment, it is preferred that the first host material is a compound with a deuteration rate of 80% or more, and the second host material is a compound with a deuteration rate of 80% or more.

[1552] In the organic EL element according to this embodiment, in the second host material, from the viewpoint of preventing the suppression of intermolecular interactions and suppressing the decrease in electron mobility, R, as a substituent of the anthracene skeleton, 201 ~R 208 Preferably hydrogen atoms, but R 201 ~R 208 It can also be an aryl group with 6 to 50 cyclic carbon atoms, substituted or unsubstituted, or a heterocyclic group with 5 to 50 cyclic atoms.

[1553] R 201 ~R 208 When the substituent is a highly sterically hindered group such as alkyl or cycloalkyl, intermolecular interactions are suppressed, and the electron mobility decreases relative to the first host material, potentially violating the μe(H2) > μe(H1) relationship described in the mathematical formula (Formula 30) described later. When the second host material is used in the second luminescent layer, it is expected that the decrease in the recombination ability of holes and electrons in the first luminescent layer and the decrease in luminous efficiency can be suppressed by satisfying the μe(H2) > μe(H1) relationship. It should be noted that as substituents, alkyl halogens, alkenyl groups, alkynyl groups, and -Si(R) are suitable choices. 901 (R) 902 (R) 903 The group shown is -O-(R) 904 The group shown is -S-(R) 905 The group shown is -N(R) 906 (R) 907 The groups shown are aralkyl groups, -C(=O)R 801 The indicated group, -COOR 802The groups, halogen atoms, cyano groups, and nitro groups shown may form high steric hindrance, while alkyl and cycloalkyl groups may form even higher steric hindrance.

[1554] In the second host material, R acts as a substituent for the anthracene skeleton. 201 ~R 208 Preferably, the substituent is not a highly sterically hindered substituent; preferably, it is not alkyl or cycloalkyl; more preferably, it is not alkyl, cycloalkyl, haloalkyl, alkenyl, alkynyl, or -Si(R) 901 (R) 902 (R) 903 The group shown is -O-(R) 904 The group shown is -S-(R) 905 The group shown is -N(R) 906 (R) 907 The groups shown are aralkyl groups, -C(=O)R 801 The indicated group, -COOR 802 The groups shown include halogen atoms, cyano groups, and nitro groups.

[1555] In the organic EL element involved in this embodiment, R is also preferred as the second host material. 201 ~R 208 Each is independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 carbon atoms, or a -Si(R) group. 901 (R) 902 (R) 903 The group shown is ).

[1556] In the organic EL element involved in this embodiment, R is present in the second host material. 201 ~R 208 Hydrogen atoms are preferred.

[1557] In the second main material, R 201 ~R 208 When the expression "substituted or unsubstituted" is used, the substituents preferably do not include the substituents that may form high steric hindrance, especially substituted or unsubstituted alkyl groups and substituted or unsubstituted cycloalkyl groups. R 201 ~R 208 When the substituent is described as "substituted or unsubstituted", it prevents the intermolecular interactions caused by the presence of highly sterically hindered substituents such as alkyl and cycloalkyl groups from being suppressed by not containing substituted or unsubstituted alkyl groups or substituted or unsubstituted cycloalkyl groups. This prevents the decrease in electron mobility. In addition, when such a second host material is used in the second light-emitting layer, it can suppress the decrease in the recombination ability of holes and electrons in the first light-emitting layer and the decrease in luminous efficiency.

[1558] Further preferred is that R, as a substituent of the anthracene skeleton, 201 ~R 208 It is not a sterically hindered substituent, but rather R as a substituent. 201 ~R 208 It is unsubstituted. Additionally, R, as a substituent in the anthracene skeleton... 201 ~R 208 In the case that it is not a highly sterically hindered substituent, R is a substituent with low steric hindrance. 201 ~R 208 In the case of top-bonded substituents, these substituents are preferably not sterically hindered substituents, and R as a substituent... 201 ~R 208 The substituent bonded above is preferably not alkyl or cycloalkyl, more preferably not alkyl, cycloalkyl, haloalkyl, alkenyl, ynyl, or -Si(R) 901 (R) 902 (R) 903 The group shown is -O-(R) 904 The group shown is -S-(R) 905 The group shown is -N(R) 906 (R) 907 The groups shown are aralkyl groups, -C(=O)R 801 The indicated group, -COOR 802 The groups shown include halogen atoms, cyano groups, and nitro groups.

[1559] In the organic EL element involved in this embodiment, it is also preferred that the substituent in the second host material, when described as "substituted or unsubstituted", is an unsubstituted alkyl group having 1 to 18 carbon atoms, an unsubstituted cycloalkyl group having 3 to 18 cyclic carbon atoms, an unsubstituted aryl group having 6 to 18 cyclic carbon atoms, or an unsubstituted heterocyclic group having 5 to 18 cyclic atoms.

[1560] In the organic EL element involved in this embodiment, it is also preferred that the substituent in the second host material, when described as "substituted or unsubstituted", is an unsubstituted alkyl group having 1 to 6 carbon atoms, an unsubstituted cycloalkyl group having 3 to 10 cyclic carbon atoms, an unsubstituted aryl group having 6 to 12 cyclic carbon atoms, or an unsubstituted heterocyclic group having 5 to 13 cyclic atoms.

[1561] In the organic EL element involved in this embodiment, it is also preferred that the groups described as "substituted or unsubstituted" in the second body material are all "unsubstituted" groups.

[1562] (Manufacturing method of the second main material)

[1563] The second main material can be manufactured using known methods. Alternatively, the second main material can also be manufactured by following known methods, using known alternative reactions and raw materials corresponding to the target substance.

[1564] (Specific examples of the second main body material)

[1565] Specific examples of the second host material include the following compounds. However, the present invention is not limited to these specific examples of the second host material.

[1566]

[1567]

[1568]

[1569]

[1570]

[1571]

[1572]

[1573]

[1574]

[1575]

[1576]

[1577]

[1578]

[1579]

[1580]

[1581]

[1582]

[1583]

[1584]

[1585]

[1586]

[1587]

[1588]

[1589]

[1590]

[1591]

[1592]

[1593] (First light-emitting layer)

[1594] In the organic EL element involved in this embodiment, the first light-emitting layer contains a first host material and a first dopant material.

[1595] In the organic EL element involved in this embodiment, it is preferable that the first light-emitting layer does not contain metal complexes.

[1596] In the organic EL element involved in this embodiment, it is also preferred that the first light-emitting layer does not contain boron-containing complexes.

[1597] In the organic EL element involved in this embodiment, it is preferable that the first light-emitting layer does not contain phosphorescent materials.

[1598] In the organic EL element of this embodiment, it is preferable that the first light-emitting layer does not contain heavy metal complexes or phosphorescent rare earth metal complexes. Here, examples of heavy metal complexes include iridium complexes, osmium complexes, and platinum complexes.

[1599] In the organic EL element involved in this embodiment, it is preferable that the singlet state energy S1(H1) of the first host material and the singlet state energy S1(D1) of the first dopant material satisfy the relationship of the above mathematical formula (mathematical formula 2).

[1600] S1(H1)>S1(D1) …(Mathematical Expression 2)

[1601] By making the first host material and the first dopant material satisfy the above mathematical formula (Mathematical Formula 2), the singlet excitons generated on the first host material can easily transfer energy from the first host material to the first dopant material, which helps the first dopant material to exhibit fluorescence luminescence.

[1602] In the organic EL element of this embodiment, it is preferable that the triplet energy T1(H1) of the first host material and the triplet energy T1(D1) of the first dopant material satisfy the following mathematical formula (mathematical formula 2A).

[1603] T1(D1)>T1(H1) …(Mathematical expression 2A)

[1604] By making the first host material and the first dopant material satisfy the above mathematical formula (Mathematical Formula 2A), the triplet excitons generated in the first light-emitting layer do not move on the first dopant material with higher triplet energy, but move on the first host material, and therefore easily move to the second light-emitting layer.

[1605] Preferably, the organic EL element involved in this embodiment satisfies the following mathematical formula (Mathematical Formula 2B).

[1606] T1(D1)>T1(H1)>T1(H2) …(Mathematical expression 2B)

[1607] (Triplet energy T1)

[1608] The following methods can be cited as methods for determining the triplet energy T1.

[1609] The compound to be tested was dissolved in EPA (diethyl ether: isopentane: ethanol = 5:5:2 (volume ratio)) to achieve a concentration of 10. -5 mol / L or higher and 10 -4 The concentration is below mol / L. The solution is added to a quartz cuvette as the test sample. For this test sample, the phosphorus spectrum is measured at low temperature (77 K) (vertical axis is set to phosphorescence intensity, horizontal axis is set to wavelength). For the rising tangent on the short wavelength side of the phosphorus spectrum, the wavelength value λ based on the intersection of this tangent and the horizontal axis is... edge [nm], the energy calculated according to the following conversion formula (F1) is taken as the triplet energy T1.

[1610] Conversion formula (F1): T1[eV]=1239.85 / λ edge

[1611] The tangent for the rise on the short-wavelength side of the phosphorus spectrum is derived as follows. Consider the tangent at each point on the spectral curve, moving from the short-wavelength side of the phosphorus spectrum up to the shortest wavelength maximum among the spectral maxima, towards the long-wavelength side. The slope of this tangent increases as the curve rises (i.e., as the vertical axis increases). The tangent drawn at the point where this slope reaches its maximum (i.e., the tangent at the inflection point) is taken as the tangent for the rise on the short-wavelength side of the phosphorus spectrum.

[1612] It should be noted that the maximum point of peak intensity with less than 15% of the maximum peak intensity of the spectrum is not included in the maximum value on the shortest wavelength side mentioned above. The tangent line drawn at the point where the slope value is the maximum value that is closest to the maximum value on the shortest wavelength side is taken as the tangent line for the rise on the short wavelength side of the phosphorus spectrum.

[1613] Phosphorescence can be measured using the main body of the F-4500 spectrophotometer manufactured by Hitachi High Tech Co., Ltd. It should be noted that the measuring apparatus is not limited to this; a cooling device, a cryogenic container, an excitation source, and a light-receiving device can be combined for measurement.

[1614] (Singlet energy S1)

[1615] The following methods can be cited as methods for determining the singlet energy S1 using a solution (sometimes called the solution method).

[1616] 10 compounds were prepared as the test targets. -5 mol / L or higher and 10 -4 A toluene solution with a concentration of less than mol / L was added to a quartz cuvette, and the absorption spectrum of the sample was measured at room temperature (300K) (the vertical axis is set as absorption intensity, and the horizontal axis is set as wavelength). For the downward tangent on the longer wavelength side of the absorption spectrum, the wavelength value λedge [nm] at the intersection of the tangent and the horizontal axis was substituted into the conversion formula (F2) shown later to calculate the singlet energy.

[1617] Conversion formula (F2): S1[eV]=1239.85 / λedge

[1618] As an absorption spectroscopy measuring device, examples include, but are not limited to, the Hitachi spectrophotometer (device name: U3310).

[1619] The tangent for the downward sag on the longer wavelength side of the absorption spectrum is derived as follows. Consider the tangent at various points on the spectral curve as the longest wavelength maximum is moved along the longer wavelength direction. This tangent exhibits a repeated pattern of decreasing and then increasing slope as the curve declines (i.e., as the value on the vertical axis decreases). The tangent drawn at the point where the slope is minimized on the longest wavelength side (excluding cases where absorbance is below 0.1) is taken as the tangent for the downward sag on the longer wavelength side of the absorption spectrum.

[1620] It should be noted that the maximum absorbance values ​​below 0.2 are not included in the maximum values ​​on the longest wavelength side mentioned above.

[1621] In the organic EL element of this embodiment, it is preferable that the content of the first dopant material in the first light-emitting layer is greater than 1.1% by mass. That is, in the first light-emitting layer, the content of the first dopant material is preferably greater than 1.1% by mass of the total mass of the first light-emitting layer, more preferably 1.2% by mass or more of the total mass of the first light-emitting layer, even more preferably 1.5% by mass or more of the total mass of the first light-emitting layer, and even more preferably 2% by mass or more of the total mass of the first light-emitting layer.

[1622] In the first light-emitting layer, the content of the first dopant material is preferably 10% or less of the total mass of the first light-emitting layer, more preferably 7% or less of the total mass of the first light-emitting layer, and even more preferably 5% or less of the total mass of the first light-emitting layer.

[1623] In the organic EL element of this embodiment, the content of the first compound, which is the first host material, in the first light-emitting layer is preferably 60% or more of the total mass of the first light-emitting layer, more preferably 70% or more of the total mass of the first light-emitting layer, even more preferably 80% or more of the total mass of the first light-emitting layer, even more preferably 90% or more of the total mass of the first light-emitting layer, and particularly preferably 95% or more of the total mass of the first light-emitting layer.

[1624] In the first light-emitting layer, the content of the first host material is preferably 99% or less of the total mass of the first light-emitting layer, more preferably 98.8% or less of the total mass of the first light-emitting layer, and even more preferably 98% or less of the total mass of the first light-emitting layer.

[1625] Wherein, when the first light-emitting layer contains a first host material and a first dopant material, the upper limit of the total content of the first host material and the first dopant material is 100% by mass.

[1626] It should be noted that this embodiment does not exclude the inclusion of materials other than the first host material and the first dopant material in the first light-emitting layer.

[1627] The first light-emitting layer may contain only one type of first host material, or it may contain two or more types. The first light-emitting layer may contain only one type of first dopant material, or it may contain two or more types.

[1628] In the organic EL device according to this embodiment, the thickness of the first light-emitting layer is preferably 3 nm or more, and more preferably 5 nm or more. If the thickness of the first light-emitting layer is 3 nm or more, it is sufficient to induce recombination of holes and electrons in the first light-emitting layer.

[1629] In the organic EL device according to this embodiment, the thickness of the first light-emitting layer is preferably 15 nm or less, more preferably 10 nm or less. If the thickness of the first light-emitting layer is 15 nm or less, it is thin enough to allow triplet excitons to move to the second light-emitting layer.

[1630] In the organic EL element involved in this embodiment, the thickness of the first light-emitting layer is more preferably 3 nm or more and 15 nm or less.

[1631] (Second light-emitting layer)

[1632] In the organic EL element of this embodiment, the second light-emitting layer contains a second host material and a second dopant material.

[1633] In the organic EL element involved in this embodiment, it is preferable that the second light-emitting layer does not contain metal complexes.

[1634] In the organic EL element involved in this embodiment, it is also preferred that the second light-emitting layer does not contain boron-containing complexes.

[1635] In the organic EL element involved in this embodiment, it is preferable that the second light-emitting layer does not contain phosphorescent materials (dopant materials).

[1636] In the organic EL element of this embodiment, it is preferable that the second light-emitting layer does not contain heavy metal complexes or phosphorescent rare earth metal complexes. Here, examples of heavy metal complexes include iridium complexes, osmium complexes, and platinum complexes.

[1637] In the organic EL element of this embodiment, it is preferable that the triplet energy T1(D2) of the second dopant material and the triplet energy T1(H2) of the second host material satisfy the following mathematical formula (Mathematical Formula 3).

[1638] T1(D2)>T1(H2) …(Mathematical Expression 3)

[1639] In the organic EL element of this embodiment, because the second dopant material and the second host material satisfy the aforementioned mathematical formula (Formula 3), triplet excitons generated in the first light-emitting layer, when moving to the second light-emitting layer, undergo energy transfer to the molecules of the second host material instead of the second dopant material, which has a higher triplet energy. Furthermore, triplet excitons generated by the recombination of holes and electrons on the second host material do not move to the second dopant material, which has a higher triplet energy. Triplet excitons generated by recombination on the molecules of the second dopant material rapidly undergo energy transfer to the molecules of the second host material.

[1640] Instead of moving to the second dopant material, triplet excitons in the second host material effectively collide with each other on the second host material through the TTF phenomenon, thereby generating singlet excitons.

[1641] In the organic EL element of this embodiment, it is preferable that the singlet energy S1(H2) of the second host material and the singlet energy S1(D2) of the second dopant material satisfy the following mathematical formula (Mathematical Formula 4).

[1642] S1(H2)>S1(D2) …(Mathematical Expression 4)

[1643] In the organic EL element of this embodiment, the second dopant material and the second host material satisfy the above mathematical formula (Mathematical Formula 4). As a result, the singlet energy of the second dopant material is less than that of the second host material. Therefore, the singlet excitons generated by the TTF phenomenon transfer energy from the second host material to the second dopant material, which helps the second dopant material to exhibit fluorescence luminescence.

[1644] In the organic EL element of this embodiment, it is preferable that the content of the second dopant material in the second light-emitting layer is greater than 1.1% by mass. That is, in the second light-emitting layer, the content of the second dopant material is preferably greater than 1.1% by mass of the total mass of the second light-emitting layer, more preferably 1.2% by mass or more of the total mass of the second light-emitting layer, even more preferably 1.5% by mass or more of the total mass of the second light-emitting layer, and even more preferably 2% by mass or more of the total mass of the second light-emitting layer.

[1645] In the second light-emitting layer, the content of the second dopant material is preferably 10% or less of the total mass of the second light-emitting layer, more preferably 7% or less of the total mass of the second light-emitting layer, and even more preferably 5% or less of the total mass of the second light-emitting layer.

[1646] In the organic EL element of this embodiment, the content of the second compound, which is the second main material, in the second light-emitting layer is preferably 60% or more of the total mass of the second light-emitting layer, more preferably 70% or more of the total mass of the second light-emitting layer, even more preferably 80% or more of the total mass of the second light-emitting layer, even more preferably 90% or more of the total mass of the second light-emitting layer, and particularly preferably 95% or more of the total mass of the second light-emitting layer.

[1647] In the second light-emitting layer, the content of the second host material is preferably 99% or less of the total mass of the second light-emitting layer, more preferably 98.8% or less of the total mass of the second light-emitting layer, and even more preferably 98% or less of the total mass of the second light-emitting layer.

[1648] Where the second light-emitting layer contains a second host material and a second dopant material, the upper limit of the total content of the second host material and the second dopant material is 100% by mass.

[1649] It should be noted that this embodiment does not exclude the inclusion of materials other than the second host material and the second dopant material in the second light-emitting layer.

[1650] In the second light-emitting layer, the second host material may contain only one type or two or more types. Similarly, the second dopant material in the second light-emitting layer may contain only one type or two or more types.

[1651] In the organic EL element according to this embodiment, the thickness of the second light-emitting layer is preferably 5 nm or more, more preferably 10 nm or more, and even more preferably 15 nm or more. If the thickness of the second light-emitting layer is 5 nm or more, it is easy to suppress the return of triplet excitons that have moved from the first light-emitting layer to the second light-emitting layer to the first light-emitting layer. In addition, if the thickness of the second light-emitting layer is 5 nm or more, the triplet excitons can be sufficiently distanced from the recombination portion in the first light-emitting layer.

[1652] In the organic EL element of this embodiment, the thickness of the second light-emitting layer is preferably 30 nm or less, more preferably 28 nm or less, and even more preferably 25 nm or less. If the thickness of the second light-emitting layer is 30 nm or less, the density of triplet excitons in the second light-emitting layer can be increased, making it easier to induce the TTF phenomenon.

[1653] In the organic EL element involved in this embodiment, it is preferred that the thickness of the second light-emitting layer is 5 nm or more and 30 nm or less.

[1654] In the organic EL element involved in this embodiment, it is also preferred that the thickness of the second light-emitting layer is greater than the thickness of the first light-emitting layer.

[1655] <Relationship between the first and second light-emitting layers>

[1656] In the organic electroluminescent element of this embodiment, it is preferable that the triplet energy T1(H1) of the first host material and the triplet energy T1(H2) of the second host material satisfy the following mathematical formula (Mathematical Formula 1).

[1657] T1(H1)>T1(H2) …(Mathematical Expression 1)

[1658] (TTF mechanism)

[1659] According to this embodiment, compared to organic EL devices that have a single light-emitting layer without multiple light-emitting layers, an organic EL device with improved luminous efficiency can be provided.

[1660] Previously, triplet-triplet-annihilation (sometimes called TTA) was known as a technique for improving the luminous efficiency of organic electroluminescent devices. TTA is a mechanism in which triplet excitons collide with each other to generate singlet excitons. It should be noted that the TTA mechanism is sometimes referred to as the TTF mechanism. The TTF mechanism is also described, for example, in International Publication No. 2007 / 138906.

[1661] The TTF phenomenon is explained. Holes injected from the anode recombine with electrons injected from the cathode within the emissive layer to generate excitons. Their spin states, as previously known, are 25% singlet excitons and 75% triplet excitons. In previously known fluorescent elements, 25% of the singlet excitons relax to the ground state and emit light, while the remaining 75% of the triplet excitons do not emit light but recover to the ground state through thermal deactivation. Therefore, the theoretical limit of the internal quantum efficiency of previous fluorescent elements was claimed to be 25%.

[1662] On the other hand, the behavior of triplet excitons generated within organic matter has been theoretically studied. According to SMBachilo et al. (J. Phys. Cem. A, 104, 7711 (2000)), if we assume that excitons of higher orders, such as quintet, immediately revert to the triplet state, then in triplet excitons (hereinafter referred to as...) 3 A * As the density of ) gradually increases, triplet excitons collide with each other, resulting in the reaction shown in the following equation. Here, 1 A represents the ground state. 1 A * This represents the lowest excited singlet exciton.

[1663] 3 A * + 3 A * →(4 / 9) 1 A + (1 / 9) 1 A * +(13 / 9) 3 A *

[1664] That is, to become 5 3 A * →4 1 A+1A *It is predicted that of the initially generated 75% of triplet excitons, 1 / 5, or 20%, will transform into singlet excitons. Therefore, the singlet excitons contributing in the form of light become 40%, which is the initial 25% plus 75% × (1 / 5) = 15%. At this point, the proportion of light emitted from TTF (TTF ratio) in the total luminescence intensity becomes 15 / 40, or 37.5%. Furthermore, if the initially generated 75% of triplet excitons collide with each other to generate singlet excitons (two triplet excitons generate one singlet exciton), a very high internal quantum efficiency of 62.5% can be obtained, which is the initial 25% of singlet excitons plus 75% × (1 / 2) = 37.5%. At this point, the TTF ratio is 37.5 / 62.5 = 60%.

[1665] According to the organic electroluminescent device of this embodiment, it is believed that for triplet excitons generated in the first light-emitting layer through recombination of holes and electrons, even if there are excess charge carriers at the interface between the first light-emitting layer and the directly adjacent organic layer, the triplet excitons at the interface between the first light-emitting layer and the organic layer are not easily quenched. For example, if recombination regions are locally present at the interface between the first light-emitting layer and the hole transport layer or the electron blocking layer, quenching due to excess electrons can be considered. On the other hand, if recombination regions are locally present at the interface between the first light-emitting layer and the electron transport layer or the hole blocking layer, quenching due to excess holes can be considered.

[1666] Preferably, the organic electroluminescent element according to this embodiment has at least two light-emitting layers (i.e., a first light-emitting layer and a second light-emitting layer) that satisfy a specified relationship, wherein the triplet energy T1(H1) of the first host material in the first light-emitting layer and the triplet energy T1(H2) of the second host material in the second light-emitting layer satisfy the relationship of the above mathematical formula (mathematical formula 1).

[1667] By having a first luminescent layer and a second luminescent layer, as per the relationship satisfying the aforementioned mathematical formula (Formula 1), triplet excitons generated in the first luminescent layer are not quenched by excess carriers and migrate to the second luminescent layer. Furthermore, reverse migration from the second luminescent layer to the first luminescent layer can be suppressed. As a result, the second luminescent layer exhibits a TTF mechanism, efficiently generating singlet excitons and improving luminescence efficiency.

[1668] Thus, the organic electroluminescent element has a first light-emitting layer that mainly generates triplet excitons and a second light-emitting layer that effectively utilizes the triplet excitons that move from the first light-emitting layer to mainly exhibit the TTF mechanism as different regions. As the second host material in the second light-emitting layer, a compound with a smaller triplet energy than the first host material in the first light-emitting layer is used to set the difference in triplet energy, thereby improving the luminous efficiency.

[1669] In the organic EL element of this embodiment, the triplet energy T1(H1) of the first host material and the triplet energy T1(H2) of the second host material preferably satisfy the following mathematical formula (Mathematical Formula 5).

[1670] T1(H1)-T1(H2)>0.03eV …(Mathematical Formula 5)

[1671] In this specification, "main material" refers to a material whose content is, for example, "50% by mass or more of the layer". Therefore, in the first light-emitting layer, for example, the content of the first main material is 50% by mass or more of the total mass of the first light-emitting layer. In the second light-emitting layer, for example, the content of the second main material is 50% by mass or more of the total mass of the second light-emitting layer.

[1672] (Emitting wavelength of organic EL devices)

[1673] The organic electroluminescent element involved in this embodiment preferably emits light with a maximum peak wavelength of less than 500 nm when the element is driven.

[1674] The organic electroluminescent element involved in this embodiment is more preferably emitting light with a maximum peak wavelength of 430 nm or more and 480 nm or less when the element is driven.

[1675] The maximum peak wavelength of light emitted by the organic EL element during element driving was determined as follows. A voltage was applied to the organic EL element such that the current density reached 10 mA / cm². 2 The spectrophotometer emission spectrum was measured using a CS-2000 spectrophotometer (manufactured by Konica Minolta Co., Ltd.). The peak wavelength of the emission spectrum where the luminous intensity reaches its maximum was determined and taken as the maximum peak wavelength (unit: nm).

[1676] The organic EL element according to this embodiment may have a first light-emitting layer and a second light-emitting layer in sequence from the anode side toward the cathode side, or it may have a second light-emitting layer and a first light-emitting layer in sequence from the anode side toward the cathode side. In either case, by selecting a combination of materials that satisfy the relationship of the above mathematical formula (Mathematical Formula 1), the effect of the light-emitting layer being a stacked structure can be expected.

[1677] In the organic EL element of this embodiment, it is preferred that a first light-emitting layer is included between the anode and the cathode, and a second light-emitting layer is included between the first light-emitting layer and the cathode.

[1678] In the organic EL element involved in this embodiment, it is preferable that the first light-emitting layer and the second light-emitting layer are directly connected.

[1679] In this specification, the layer structure in which "the first light-emitting layer and the second light-emitting layer are directly connected" may also include any of the following schemes (LS1), (LS2) and (LS3).

[1680] (LS1) A scheme in which a region is formed where the first host material and the second host material coexist during the vapor deposition process of the compound involved in the first light-emitting layer and the vapor deposition process of the compound involved in the second light-emitting layer, and the region exists at the interface between the first light-emitting layer and the second light-emitting layer.

[1681] (LS2) In the case where the first light-emitting layer and the second light-emitting layer contain luminescent compounds, a region in which the first host material, the second host material and the luminescent compound coexist is generated during the vapor deposition process of the compound involved in the first light-emitting layer and the vapor deposition process of the compound involved in the second light-emitting layer, and the region exists at the interface between the first light-emitting layer and the second light-emitting layer.

[1682] (LS3) In the case where the first light-emitting layer and the second light-emitting layer contain a luminescent compound, a region formed by the luminescent compound, a region formed by the first host material, or a region formed by the second host material is generated during the vapor deposition process of the compound involved in the first light-emitting layer and the vapor deposition process of the compound involved in the second light-emitting layer, and the region exists at the interface between the first light-emitting layer and the second light-emitting layer.

[1683] In the above schemes (LS1) to (LS3), the luminescent compound is, for example, at least one of the first dopant material and the second dopant material.

[1684] In the organic EL element of this embodiment, the triplet energy T1(DX) of the first dopant material contained in the first light-emitting layer or the second dopant material contained in the second light-emitting layer, the triplet energy T1(H1) of the first host material and the triplet energy T1(H2) of the second host material preferably satisfy the following mathematical formula (mathematical formula 10X), and more preferably satisfy the following mathematical formula (mathematical formula 10).

[1685] 2.70eV>T1(DX)>T1(H1)>T1(H2) …(Mathematical formula 10X)

[1686] 2.60eV>T1(DX)>T1(H1)>T1(H2) …(Mathematical Formula 10)

[1687] In the organic EL element of this embodiment, the triplet energy T1(D1) of the first dopant material preferably satisfies the following mathematical formula (mathematical formula 10AX), and more preferably satisfies the following mathematical formula (mathematical formula 10A).

[1688] 2.70 eV > T1(D1) > T1(H1) > T1(H2) …(Mathematical expression 10AX)

[1689] 2.60eV>T1(D1)>T1(H1)>T1(H2) …(Mathematical formula 10A)

[1690] In the organic EL element of this embodiment, the triplet energy T1(D2) of the second dopant material preferably satisfies the following mathematical formula (mathematical formula 10BX), and more preferably satisfies the following mathematical formula (mathematical formula 10B).

[1691] 2.70 eV > T1(D2) > T1(H1) > T1(H2) …(Mathematical expression 10BX)

[1692] 2.60eV>T1(D2)>T1(H1)>T1(H2) …(Mathematical formula 10B)

[1693] In the organic EL element of this embodiment, the triplet energy T1(DX) of the first dopant material or the second dopant material and the triplet energy T1(H1) of the first host material preferably satisfy the following mathematical formula (mathematical formula 11X), and also preferably satisfy the following mathematical formula (mathematical formula 11).

[1694] 0 eV < T1(DX) - T1(H1) < 0.70 eV … (Mathematical formula 11X)

[1695] 0 eV < T1(DX) - T1(H1) < 0.60 eV … (Mathematical Formula 11)

[1696] In the organic EL element of this embodiment, the triplet energy T1(D1) of the first dopant material preferably satisfies the following mathematical formula (mathematical formula 11AX) and also preferably satisfies the following mathematical formula (mathematical formula 11A).

[1697] 0 eV < T1(D1) - T1(H1) < 0.70 eV … (Mathematical expression 11AX)

[1698] 0 eV < T1(D1) - T1(H1) < 0.60 eV … (Mathematical formula 11A)

[1699] In the organic EL element of this embodiment, the triplet energy T1(D2) of the second dopant material preferably satisfies the following mathematical formula (mathematical formula 11BX) and also preferably satisfies the following mathematical formula (mathematical formula 11B).

[1700] -0.15eV < T1(D2) - T1(H1) < 0.70eV …(Mathematical formula 11BX)

[1701] 0 eV < T1(D2) - T1(H2) < 0.80 eV … (Mathematical expression 11B)

[1702] In the organic EL element of this embodiment, the triplet energy T1(H1) of the first host material preferably satisfies the following mathematical formula (Mathematical Formula 12).

[1703] T1(H1)>2.0eV …(Mathematical Formula 12)

[1704] In the organic EL element of this embodiment, the triplet energy T1(H2) of the second host material preferably satisfies the following mathematical formula (Mathematical Formula 13X), and more preferably satisfies the following mathematical formula (Mathematical Formula 13).

[1705] T1(H2)≥1.80eV …(Mathematical expression 13X)

[1706] T1(H2)≥1.85eV …(Mathematical Formula 13)

[1707] In the organic EL element of this embodiment, the triplet energy T1(H2) of the second host material preferably satisfies the following mathematical formula (Mathematical Formula 14).

[1708] 1.90eV≥T1(H2) …(Mathematical Expression 14)

[1709] In the organic EL element involved in this embodiment, the triplet energy T1(H2) of the second host material preferably also satisfies the following mathematical formula (Mathematical Formula 13A).

[1710] 1.90eV≥T1(H2)≥1.80eV …(Mathematical formula 13A)

[1711] In the organic EL element of this embodiment, when the stacking order of the first light-emitting layer and the second light-emitting layer is from the anode side to the second light-emitting layer, the electron mobility μe(H1) of the first host material and the electron mobility μe(H2) of the second host material preferably satisfy the following mathematical formula (mathematical formula 30).

[1712] μe(H2)>μe(H1) …(Mathematical Formula 30)

[1713] By satisfying the relationship between the first host material and the second host material as described in the above mathematical formula (Mathematical Formula 30), the recombination ability of holes and electrons in the first light-emitting layer is improved.

[1714] In the organic EL element of this embodiment, when the stacking order of the first light-emitting layer and the second light-emitting layer is from the anode side to the second light-emitting layer, the hole mobility μh(H1) of the first host material and the hole mobility μh(H2) of the second host material preferably satisfy the following mathematical formula (mathematical formula 31).

[1715] μh(H1)>μh(H2) …(Mathematical Formula 31)

[1716] In the organic EL element of this embodiment, when the stacking order of the first light-emitting layer and the second light-emitting layer is from the anode side to the second light-emitting layer, the hole mobility μh(H1), the electron mobility μe(H1), the hole mobility μh(H2), and the electron mobility μe(H2) of the second host material preferably satisfy the following mathematical formula (mathematical formula 32).

[1717] (μe(H2) / μh(H2))>(μe(H1) / μh(H1)) …(Mathematical Expression 32)

[1718] Electron mobility can be measured by impedance measurement using a mobility evaluation element manufactured according to the steps below. The mobility evaluation element is manufactured, for example, according to the steps below.

[1719] On a glass substrate with an aluminum electrode (anode), a compound Target, which is the object of electron mobility measurement, is deposited by vapor deposition in a manner covering the aluminum electrode to form a measurement object layer. An electron transport layer is formed by vapor deposition of compound ET-A on the measurement object layer. An electron injection layer is formed by vapor deposition of LiF on the electron transport layer. A metallic aluminum (Al) is formed by vapor deposition on the electron injection layer.

[1720] The above mobility evaluation is represented by abbreviated components as shown below.

[1721] glass / Al(50) / Target(200) / ET-A(10) / LiF(1) / Al(50)

[1722] It should be noted that the numbers in parentheses represent the film thickness (nm).

[1723]

[1724] An electron mobility evaluation element is placed in an impedance measuring device for impedance measurement. The impedance measurement is performed by scanning the measurement frequency from 1 Hz to 1 MHz. At this time, a DC voltage V is applied to the element simultaneously with an AC amplitude of 0.1 V. The modulus M is calculated based on the measured impedance Z using the following formula (C1).

[1725] Formula (C1): M=jωZ

[1726] In the above calculation formula (C1), j is its imaginary unit with a square of -1, and ω is the angular frequency [rad / s].

[1727] In a Bode plot where the imaginary part of the modulus M is set as the vertical axis and the frequency [Hz] is set as the horizontal axis, the electrical time constant τ of the mobility evaluation element is calculated using the following formula (C2) based on the frequency fmax representing the peak.

[1728] Formula (C2): τ=1 / (2πfmax)

[1729] In the above calculation formula (C2), π is the symbol for the value of pi.

[1730] The electron mobility μe is calculated using the above τ according to the following formula (C3-1).

[1731] Calculation formula (C3-1): μe=d 2 / (Vτ)

[1732] In the above calculation formula (C3-1), d is the total thickness of the organic thin film constituting the element. In the case of an element used for evaluating electron mobility, d = 210 [nm].

[1733] Hole mobility can be measured by impedance measurement using a mobility evaluation element manufactured according to the steps below. The mobility evaluation element is manufactured, for example, according to the steps below.

[1734] A hole injection layer is formed by vapor deposition of compound HA-2 on a glass substrate with an ITO transparent electrode (anode) to cover the transparent electrode. A hole transport layer is then formed by vapor deposition of compound HT-A on the hole injection layer. Next, a test layer is formed by vapor deposition of compound Target, which is the target for hole mobility measurement. Finally, a metal cathode is formed by vapor deposition of metallic aluminum (Al) on the test layer.

[1735] The above mobility evaluation is represented by abbreviated components as shown below.

[1736] ITO(130) / HA-2(5) / HT-A(10) / Target(200) / Al(80)

[1737] It should be noted that the numbers in parentheses represent the film thickness (nm).

[1738]

[1739] An element for evaluating hole mobility was placed in an impedance measuring device, and impedance measurements were performed. The impedance measurement was conducted by scanning from 1 Hz to 1 MHz. At this time, a DC voltage V was applied to the element simultaneously with an AC amplitude of 0.1 V. Based on the measured impedance Z, the modulus M was calculated using the aforementioned formula (C1).

[1740] In a Bode plot where the imaginary part of the modulus M is set as the vertical axis and the frequency [Hz] is set as the horizontal axis, the electrical time constant τ of the mobility evaluation element is calculated using the above formula (C2) based on the frequency fmax representing the peak.

[1741] Using τ obtained from the above formula (C2), the hole mobility μh is calculated according to the relationship of the following formula (C3-2).

[1742] Calculation formula (C3-2): μh=d 2 / (Vτ)

[1743] In the above calculation formula (C3-2), d is the total thickness of the organic thin film constituting the element. In the case of the element constituting the hole mobility evaluation, d = 215 [nm].

[1744] The electron mobility and hole mobility in this specification are the square root of the electric field strength E. 1 / 2 =500[V 1 / 2 / cm 1 / 2 The value at time []. The square root of the electric field strength E 1 / 2 It can be calculated from the following formula (C4).

[1745] Calculation formula (C4): E 1 / 2 =V 1 / 2 / d 1 / 2

[1746] The impedance measurement described above uses Solartron's Model 1260 as the impedance measuring device. For higher accuracy, Solartron's Model 1296 dielectric constant measuring interface can also be used.

[1747] The composition of organic EL elements will be further explained.

[1748] (Substrate)

[1749] The substrate is used as a support for the organic electroluminescent (EL) element. Examples of substrates that can be used include glass, quartz, and plastic. Flexible substrates can also be used. A flexible substrate is a substrate that can be bent (flexible). Examples of flexible substrates include plastic substrates. Materials used to form the plastic substrate include polycarbonate, polyarylate, polyethersulfone, polypropylene, polyester, polyvinyl fluoride, polyvinyl chloride, polyimide, and polyethylene naphthalate. Inorganic vapor-deposited films can also be used.

[1750] (anode)

[1751] The anode formed on the substrate is preferably a metal, alloy, conductive compound, or mixture thereof with a high work function (specifically 4.0 eV or higher). Examples of such anodes include indium tin oxide (ITO), indium tin oxide containing silicon or silicon oxide, indium zinc oxide, indium oxide containing tungsten oxide and zinc oxide, and graphene. Other examples include gold (Au), platinum (Pt), nickel (Ni), tungsten (W), chromium (Cr), molybdenum (Mo), iron (Fe), cobalt (Co), copper (Cu), palladium (Pd), titanium (Ti), or nitrides of metallic materials (e.g., titanium nitride).

[1752] These materials are typically formed by sputtering. For example, indium oxide-zinc oxide can be formed by sputtering using a target containing 1% to 10% zinc oxide relative to indium oxide. Alternatively, indium oxide containing tungsten oxide and zinc oxide can be formed by sputtering using a target containing 0.5% to 5% tungsten oxide and 0.1% to 1% zinc oxide relative to indium oxide. Furthermore, these materials can also be fabricated using vacuum evaporation, coating, inkjet printing, spin coating, and other similar methods.

[1753] In the EL layer formed on the anode, the hole injection layer formed with the anode in contact with the ground is formed using a composite material that is easy to inject holes with, which is independent of the work function of the anode. Therefore, materials that can be used as electrode materials (such as metals, alloys, conductive compounds and mixtures thereof, as well as elements belonging to Group 1 or Group 2 of the periodic table) can be used.

[1754] Elements belonging to Group 1 or Group 2 of the periodic table that have low work functions can also be used, namely alkali metals such as lithium (Li) and cesium (Cs), and alkaline earth metals such as magnesium (Mg), calcium (Ca), and strontium (Sr), as well as alloys containing them (e.g., MgAg, AlLi), rare earth metals such as europium (Eu) and ytterbium (Yb), and alloys containing them. It should be noted that when using alkali metals, alkaline earth metals, and their alloys to form the anode, vacuum evaporation or sputtering methods can be used. Furthermore, when using silver paste, coating or inkjet printing methods can be used.

[1755] When the organic EL element is a bottom-emitting type, the anode is preferably formed of a transparent or semi-transparent metallic material that transmits light from the light-emitting layer. In this specification, transparent or semi-transparent refers to the property of transmitting 50% or more (preferably 80% or more) of the light emitted from the light-emitting layer. The transparent or semi-transparent metallic material can be appropriately selected from the materials listed in the section on anodes described above.

[1756] In the case of a top-emitting organic EL element, the anode is a reflective electrode with a reflective layer. The reflective layer is preferably formed of a light-reflective metallic material. In this specification, light reflectivity refers to the property of reflecting 50% or more (preferably 80% or more) of the light emitted from the light-emitting layer. The light-reflective metallic material can be appropriately selected from the materials listed in the section on the anode.

[1757] The anode can consist of only a reflective layer, or it can be a multilayer structure having a reflective layer and a conductive layer (preferably a transparent conductive layer). When the anode has both a reflective layer and a conductive layer, it is preferable to place the conductive layer between the reflective layer and the hole transport region. The conductive layer can be appropriately selected from the materials listed in the above-described anode section.

[1758] (cathode)

[1759] The cathode preferably uses metals, alloys, conductive compounds, and mixtures thereof with low work functions (specifically, below 3.8 eV). Specific examples of such cathode materials include elements belonging to Group 1 or Group 2 of the periodic table, namely alkali metals such as lithium (Li) and cesium (Cs), alkaline earth metals such as magnesium (Mg), calcium (Ca), and strontium (Sr), as well as alloys containing them (e.g., MgAg, AlLi), rare earth metals such as europium (Eu) and ytterbium (Yb), and alloys containing them.

[1760] It should be noted that when using alkali metals, alkaline earth metals, or alloys containing them to form the cathode, vacuum evaporation or sputtering methods can be used. Additionally, when using silver paste, coating or inkjet printing methods can be used.

[1761] It should be noted that by setting an electron injection layer, a wide variety of conductive materials, such as Al, Ag, ITO, graphene, and indium tin oxide containing silicon or silicon oxide, can be used to form cathodes regardless of the work function. These conductive materials can be deposited using methods such as sputtering, inkjet printing, and spin coating.

[1762] When the organic EL element is a bottom-emitting type, the cathode is a reflective electrode. The reflective electrode is preferably formed of a light-reflective metallic material. Alternatively, the light-reflective metallic material may be appropriately selected from the materials listed in the section on cathodes described above.

[1763] When the organic EL element is a top-emitting type, the cathode is preferably formed of a transparent or semi-transparent metallic material that transmits light from the light-emitting layer. The transparent or semi-transparent metallic material can be appropriately selected from the materials listed in the section on cathodes described above.

[1764] The organic EL element involved in the first embodiment can be a bottom-emitting organic EL element. Alternatively, the organic EL element involved in this embodiment can be a top-emitting organic EL element.

[1765] When the organic EL element is a bottom-emitting type, it is preferable that the anode is a light-transmitting electrode and the cathode is a light-reflecting electrode.

[1766] When the organic EL element is a top-emitting type, it is preferable that the anode is a light-reflective electrode with light reflectivity and the cathode is a light-transmitting electrode with light transmittance.

[1767] (Capping Layer)

[1768] When the organic EL element is a top-emitting type, the organic EL element usually has a capping layer on the top of the cathode.

[1769] The capping layer may contain, for example, at least one compound selected from polymers, metal oxides, metal fluorides, metal borides, silicon nitrides, and silicon compounds (silicon oxides, etc.).

[1770] In addition, the capping layer may contain, for example, at least one compound selected from aromatic amine derivatives, anthracene derivatives, pyrene derivatives, fluorene derivatives, or dibenzofuran derivatives.

[1771] In addition, laminates containing layers of these substances can also be used as capping layers.

[1772] (hole injection layer)

[1773] A hole injection layer is a layer containing a material with high hole injection capability. Materials with high hole injection capability can include molybdenum oxide, titanium oxide, vanadium oxide, rhenium oxide, ruthenium oxide, chromium oxide, zirconium oxide, hafnium oxide, tantalum oxide, silver oxide, tungsten oxide, and manganese oxide.

[1774] In addition, examples of substances with high hole injection potential include 4,4',4''-tris(N,N-diphenylamino)triphenylamine (TDATA), 4,4',4''-tris[N-(3-methylphenyl)-N-phenylamino]triphenylamine (MTDATA), 4,4'-bis[N-(4-diphenylaminophenyl)-N-phenylamino]biphenyl (DPAB), and 4,4'-bis(N-{4-[N'-(3-methylphenyl)-N'-phenylamino]phenyl}-N-phenylamino)biphenyl (abbreviated as TDATA). Aromatic amine compounds such as DNTPD, 1,3,5-tris[N-(4-diphenylaminophenyl)-N-phenylamino]benzene (abbreviated as DPA3B), 3-[N-(9-phenylcarbazole-3-yl)-N-phenylamino]-9-phenylcarbazole (abbreviated as PCzPCA1), 3,6-bis[N-(9-phenylcarbazole-3-yl)-N-phenylamino]-9-phenylcarbazole (abbreviated as PCzPCA2), and 3-[N-(1-naphthyl)-N-(9-phenylcarbazole-3-yl)amino]-9-phenylcarbazole (abbreviated as PCzPCN1) are among the examples.

[1775] In addition, high-molecular-weight compounds (oligomers, dendritic polymers, polymers, etc.) can also be used as substances with high hole injection capabilities. Examples include poly(N-vinylcarbazole) (PVK), poly(4-vinyltriphenylamine) (PVTPA), poly[N-(4-{N'-[4-(4-diphenylamino)phenyl]phenyl-N'-phenylamino}phenyl)methacrylamide] (PTPDMA), and poly[N,N'-bis(4-butylphenyl)-N,N'-bis(phenyl)benzidine] (Poly-TPD). Furthermore, acid-containing polymers such as poly(3,4-ethylenedioxythiophene) / poly(styrenesulfonic acid) (PEDOT / PSS) and polyaniline / poly(styrenesulfonic acid) (PAni / PSS) can also be used.

[1776] (Hole transport layer)

[1777] The hole transport layer is a layer containing substances with high hole transport capacity. Aromatic amine compounds, carbazole derivatives, anthracene derivatives, etc., can be used in the hole transport layer. Specifically, 4,4'-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (NPB), N,N'-bis(3-methylphenyl)-N,N'-diphenyl-[1,1'-biphenyl]-4,4'-diamine (TPD), 4-phenyl-4'-(9-phenylfluorene-9-yl)triphenylamine (BAFLP), and 4,4'-bis[N-(9,9-dimethylfluorene-2-yl)-N- Aromatic amine compounds such as [phenylamino]biphenyl (abbreviated as DFLDPBi), 4,4',4''-tris(N,N-diphenylamino)triphenylamine (abbreviated as TDATA), 4,4',4''-tris[N-(3-methylphenyl)-N-phenylamino]triphenylamine (abbreviated as MTDATA), and 4,4'-bis[N-(spiro-9,9'-bisfluorene-2-yl)-N-phenylamino]biphenyl (abbreviated as BSPB) are mentioned. The substances described herein mainly possess 10 -6 cm 2 Substances with a hole mobility of / (Vs) or higher.

[1778] The hole transport layer can use carbazole derivatives such as CBP, CzPA, and PCzPA, and anthracene derivatives such as t-BuDNA, DNA, and DPANth. Polymer compounds such as poly(N-vinylcarbazole) (PVK) and poly(4-vinyltriphenylamine) (PVTPA) can also be used.

[1779] It should be noted that any material whose hole transport capacity is higher than that of electrons can also use these other materials. It should also be noted that the layer containing the material with high hole transport capacity can be a single layer or a layer composed of two or more layers of the aforementioned materials stacked together.

[1780] (Electron blocking layer)

[1781] The electron blocking layer is preferably a layer that transports holes and prevents electrons from reaching layers further anode than the electron blocking layer (e.g., hole transport layers).

[1782] In the organic EL element of this embodiment, the electron blocking layer contains a compound such as a known compound for electron blocking layers, including at least one compound selected from the group consisting of aromatic amine compounds and carbazole derivatives. Alternatively, the compound in the electron blocking layer can be a monoamine compound having only one substituted or unsubstituted amino group in the molecule. Furthermore, the compound in the electron blocking layer can be a compound having a substituted or unsubstituted carbazole group and one substituted or unsubstituted amino group in the molecule.

[1783] An electron blocking layer can be a layer that prevents excitons generated in the light-emitting layer from moving to a layer closer to the anode side than the electron blocking layer (such as a hole transport layer and a hole injection layer), so that the excitation energy does not leak from the light-emitting layer to the surrounding layers.

[1784] (Cavity barrier layer)

[1785] The hole blocking layer is preferably a layer that transports electrons and prevents holes from reaching layers further from the cathode side than the hole blocking layer (e.g., an electron transport layer). The compound contained in the hole blocking layer is, for example, a known compound for hole blocking layers. Similar to the compounds for electron transport layers described later, the compound contained in the hole blocking layer is preferably at least one compound selected from the group consisting of metal complexes, heteroaromatic compounds, and polymeric compounds. Additionally, the compound contained in the hole blocking layer can be, for example, at least one compound selected from the group consisting of imidazole derivatives, benzimidazole derivatives, azazine derivatives, carbazole derivatives, and phenanthroline derivatives. In the organic EL element according to this embodiment, the electron transport region material contained in the hole blocking layer is preferably a diazine derivative or a triazine derivative, more preferably a pyrimidine derivative or a 1,3,5-triazine derivative.

[1786] The hole blocking layer is preferably a layer that prevents excitons generated in the light-emitting layer from moving to layers closer to the cathode side than the hole blocking layer (such as electron transport layers and electron injection layers) so that the excitation energy does not leak from the light-emitting layer to the surrounding layers.

[1787] (Electron transport layer)

[1788] The electron transport layer is a layer containing substances with high electron transport capacity. The electron transport layer can utilize 1) metal complexes such as aluminum complexes, beryllium complexes, and zinc complexes; 2) heteroaromatic compounds such as imidazole derivatives, benzimidazole derivatives, azazine derivatives, carbazole derivatives, and phenanthroline derivatives; and 3) high molecular weight compounds. Specifically, as low molecular weight organic compounds, metal complexes such as Alq, tris(4-methyl-8-hydroxyquinoline)aluminum (Almq3), bis(10-hydroxybenzo[h]quinoline)beryllium (BeBq2), BAlq, Znq, ZnPBO, and ZnBTZ can be used. In addition to metal complexes, heteroaromatic compounds such as 2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (abbreviated as PBD), 1,3-bis[5-(p-tert-butylphenyl)-1,3,4-oxadiazole-2-yl]benzene (abbreviated as OXD-7), 3-(4-tert-butylphenyl)-4-phenyl-5-(4-biphenyl)-1,2,4-triazole (abbreviated as TAZ), 3-(4-tert-butylphenyl)-4-(4-ethylphenyl)-5-(4-biphenyl)-1,2,4-triazole (abbreviated as p-EtTAZ), phenanthroline (abbreviated as BPhen), copper hydroxide (abbreviated as BCP), and 4,4'-bis(5-methylbenzoxazol-2-yl)zirconia (abbreviated as BzOs) can also be used. The substances described herein mainly possess 10 -6 cm 2 Materials with an electron mobility of / (Vs) or higher. It should be noted that any material whose electron transport capability is higher than its hole transport capability can also be used as the electron transport layer. Furthermore, the electron transport layer can be a single layer or a layer composed of two or more layers of the aforementioned materials stacked together.

[1789] Alternatively, polymeric compounds can be used in the electron transport layer. For example, poly[(9,9-dihexylfluorene-2,7-diyl)-co-(pyridine-3,5-diyl)] (abbreviated as PF-Py) and poly[(9,9-dioctylfluorene-2,7-diyl)-co-(2,2'-bipyridine-6,6'-diyl)] (abbreviated as PF-BPy) can be used.

[1790] (Electron injection layer)

[1791] The electron injection layer is a layer containing a material with high electron-injection properties. Alkali metals, alkaline earth metals, or their compounds, such as lithium (Li), cesium (Cs), calcium (Ca), lithium fluoride (LiF), cesium fluoride (CsF), calcium fluoride (CaF2), and lithium oxide (LiOx), can be used in the electron injection layer. Alternatively, materials containing alkali metals, alkaline earth metals, or their compounds can be used; specifically, materials containing magnesium (Mg) in Alq can be used. It should be noted that electron injection from the cathode can be performed more efficiently in this case.

[1792] Alternatively, a composite material consisting of an organic compound and an electron donor can be used in the electron injection layer. Such a composite material exhibits excellent electron injection and electron transport properties because it generates electrons within the organic compound through the electron donor. In this case, the organic compound is preferably a material with excellent electron transport properties; specifically, substances constituting the electron transport layer (metal complexes, heteroaromatic compounds, etc.) described above can be used. The electron donor can be any substance that exhibits electron-donating properties to the organic compound. Specifically, alkali metals, alkaline earth metals, and rare earth metals are preferred, such as lithium, cesium, magnesium, calcium, erbium, and ytterbium. Additionally, alkali metal oxides and alkaline earth metal oxides are preferred, such as lithium oxides, calcium oxides, and barium oxides. Furthermore, Lewis bases such as magnesium oxide can also be used. Additionally, organic compounds such as tetrathiofulvalene (TTF) can also be used.

[1793] (Layer Formation Method)

[1794] The method for forming each layer of the organic EL element involved in any of the embodiments described above is not limited except as specifically mentioned above. Known methods such as vacuum evaporation, sputtering, plasma deposition, ion plating and other dry film formation methods, spin coating, immersion coating, flow coating and inkjet coating and other wet film formation methods can be used.

[1795] (film thickness)

[1796] The thickness of each layer in the light-emitting unit of the organic EL element according to the first embodiment is not limited except as specifically mentioned above. Generally speaking, if the film thickness is too thin, defects such as pinholes are easily generated; if the film thickness is too thick, a high applied voltage is required, and the efficiency deteriorates. Therefore, the film thickness of each layer in the light-emitting unit of the organic EL element is preferably in the range of several nm to 1 μm.

[1797] <General Structure of Organic EL Components>

[1798] Figure 1 The diagram shows the general configuration of a first example of an organic EL element according to this embodiment. Figure 1 The organic EL element 1 shown includes a light-transmitting substrate 2, an anode 3, a cathode 4, and a light-emitting unit 10 disposed between the anode 3 and the cathode 4. The light-emitting unit 10, starting from the anode 3 side, sequentially includes a hole transport region 6, a light-emitting region 5, and an electron transport region 7. The hole transport region 6, starting from the anode 3 side, sequentially includes a hole injection layer 61 and a hole transport layer 62. The light-emitting region 5, starting from the anode 3 side, sequentially includes a first light-emitting layer 51 and a second light-emitting layer 52. The electron transport region 7, starting from the anode 3 side, sequentially includes an electron transport layer 71 and an electron injection layer 72. This invention is not limited to... Figure 1 The organic EL element shown is configured as follows. For example, in organic EL element 1, a blocking layer may be included between hole transport layer 62 and first light-emitting layer 51, preferably an electron blocking layer. Additionally, in organic EL element 1, a blocking layer may be included between second light-emitting layer 52 and electron transport layer 71, preferably a hole blocking layer.

[1799] Figure 2 The diagram shows the general configuration of a second example of an organic EL element according to this embodiment. Figure 2 The organic EL element 1A shown includes a light-transmitting substrate 2, an anode 3, a cathode 4, and a light-emitting unit 10A disposed between the anode 3 and the cathode 4. The light-emitting unit 10A, starting from the anode 3 side, sequentially includes a hole transport region 6, a light-emitting region 5A, and an electron transport region 7. The hole transport region 6 and electron transport region 7 in the organic EL element 1A are the same as those in the organic EL element 1. The light-emitting region 5A, starting from the anode 3 side, sequentially includes a second light-emitting layer 52 and a first light-emitting layer 51. This invention is not limited to... Figure 2 The organic EL element shown is configured as follows. For example, in organic EL element 1A, a blocking layer may be included between hole transport layer 62 and second light-emitting layer 52, preferably an electron blocking layer. Additionally, in organic EL element 1A, a blocking layer may be included between first light-emitting layer 51 and electron transport layer 71, preferably a hole blocking layer.

[1800] [Second Implementation]

[1801] (Electronic devices)

[1802] The electronic device according to this embodiment is equipped with any of the organic electroluminescent elements described in the above embodiments. Examples of electronic devices include display devices and light-emitting devices. Examples of display devices include display components (e.g., organic EL panel modules), televisions, mobile phones, tablet computers, and personal computers. Examples of light-emitting devices include lighting and vehicle lamps.

[1803] [Variations on the implementation method]

[1804] It should be noted that the present invention is not limited to the above-described embodiments, and modifications and improvements made within the scope of achieving the purpose of the present invention are also included in the present invention.

[1805] For example, the number of light-emitting layers is not limited to two; more than two light-emitting layers can be stacked. In the case of an organic EL device having more than two light-emitting layers, it is sufficient as long as at least two light-emitting layers meet the conditions described in the above embodiments. For example, the other light-emitting layers can be fluorescent light-emitting layers or phosphorescent light-emitting layers that utilize light emission based on electron transitions from a triplet excited state to the ground state.

[1806] In addition, when an organic EL element has multiple light-emitting layers, these light-emitting layers can be arranged adjacent to each other, or they can be a so-called tandem organic EL element formed by stacking multiple light-emitting units with an intermediate layer between them.

[1807] Alternatively, a blocking layer may be disposed adjacent to at least one side of the light-emitting layer, on both the anode and cathode sides. The blocking layer is preferably disposed grounded with the light-emitting layer to block at least one of holes, electrons, and excitons.

[1808] For example, when a barrier layer is grounded on the cathode side of the light-emitting layer, the barrier layer transports electrons and prevents holes from reaching layers closer to the cathode side than the barrier layer (e.g., electron transport layers). In the case of an organic EL device that includes an electron transport layer, it is preferable to include the barrier layer between the light-emitting layer and the electron transport layer.

[1809] Furthermore, when a blocking layer is grounded on the anode side of the light-emitting layer, this blocking layer transports holes and prevents electrons from reaching layers closer to the anode side than the blocking layer (e.g., hole transport layers). In the case of an organic EL device that includes a hole transport layer, it is preferable to include the blocking layer between the light-emitting layer and the hole transport layer.

[1810] In addition, to prevent excitation energy from leaking from the light-emitting layer to its surrounding layers, a barrier layer can be placed adjacent to the light-emitting layer. This prevents excitons generated in the light-emitting layer from moving to layers closer to the electrode side than the barrier layer (such as electron transport layers and hole transport layers).

[1811] Preferably, the light-emitting layer is bonded to the blocking layer.

[1812] Furthermore, the specific structure and shape in the implementation of the present invention may be configured as other structures within the scope of achieving the purpose of the present invention.

[1813] Example

[1814] The present invention will be further described in detail below with reference to specific embodiments. The present invention is not limited to these embodiments in any way.

[1815] <Compound>

[1816] The following shows the structure of the compound (first host material) represented by formula (H1-1) or formula (H1-2) used in the manufacture of the organic EL element involved in each embodiment and comparative example.

[1817]

[1818]

[1819]

[1820]

[1821]

[1822]

[1823]

[1824]

[1825]

[1826] The following shows the structure of the polycyclic aromatic compound (first dopant material or second dopant material) of formula (DX) used in the manufacture of the organic EL elements involved in the embodiments and comparative examples.

[1827]

[1828]

[1829] The structure of the dopant material used in the fabrication of the organic EL element involved in Comparative Example 43-3 is shown below.

[1830]

[1831] The following shows the structure of the second host material represented by formula (H2) used in the manufacture of the organic EL elements involved in each embodiment and comparative example.

[1832]

[1833]

[1834] The following shows the structures of other compounds used in the manufacture of the organic EL elements involved in the various embodiments and comparative examples.

[1835]

[1836]

[1837] <Fabrication of Organic EL Components 1>

[1838] The following describes the fabrication and evaluation of organic EL components.

[1839] [Example 1]

[1840] A glass substrate (manufactured by Geomatec Corporation) with an ITO (indium tin oxide) transparent electrode (anode) and a thickness of 25mm × 75mm × 1.1mm was ultrasonically cleaned in isopropanol for 5 minutes, followed by UV ozone cleaning for 30 minutes. The film thickness of the ITO transparent electrode was set to 135nm.

[1841] The cleaned glass substrate with transparent electrode lines was mounted on the substrate holder of a vacuum evaporation apparatus. First, compound HT-1 and compound HA were co-deposited on the side where the transparent electrode lines were formed, covering the transparent electrode, to form a hole injection layer with a thickness of 15 nm. The hole injection layer contained 90% by mass of compound HT-1 and 10% by mass of compound HA.

[1842] Next, compounds HT-1 and HT-2 were co-deposited on the hole injection layer to form a first hole transport layer with a thickness of 70 nm. The content of compound HT-1 in the first hole transport layer was 50% by mass, and the content of compound HT-2 was 50% by mass.

[1843] Next, the compound EBL was deposited on top of the first hole transport layer to form a second hole transport layer (also known as an electron blocking layer) with a thickness of 15 nm.

[1844] Compound BH1-1 (first host material) and compound BD-1 (first dopant material) were co-deposited on the second hole transport layer to form a first light-emitting layer with a thickness of 6 nm. The content of compound BH1-1 in the first light-emitting layer is 97% by mass, and the content of compound BD-1 is 3% by mass.

[1845] Compound BH2 (second host material) and compound BD-2 (second dopant material) were co-deposited on the first luminescent layer to form a second luminescent layer with a thickness of 24 nm. The content of compound BH2 in the second luminescent layer was 97% by mass, and the content of compound BD-2 was 3% by mass.

[1846] Compounds ET-1 and ET-2 were co-deposited on the second luminescent layer to form a first electron transport layer (also known as a hole blocking layer) with a thickness of 20 nm. The first electron transport layer contained 50% by mass of compound ET-1 and 50% by mass of compound ET-2.

[1847] An electron injection layer with a thickness of 1 nm was formed by evaporating LiF on top of the first electron transport layer.

[1848] A cathode with a film thickness of 80 nm was formed by evaporating metallic Al on top of the electron injection layer.

[1849] The component configuration of Embodiment 1 is represented in abbreviation as follows.

[1850] ITO(135) / HT-1: HA(15, 90%: 10%) / HT-1: HT-2 (70, 50%: 50%) / EBL(15) / BH1-1: BD -1(6,97%:3%) / BH2:BD-2(24,97%:3%) / ET-1:ET-2(20,50%:50%) / LiF(1) / Al(80)

[1851] It should be noted that the numbers in parentheses represent the film thickness (unit: nm).

[1852] Similarly, within parentheses, the percentages (90%: 10%) represent the content (mass%) of compounds HT-1 and HA in the hole injection layer. The percentages (50%: 50%) represent the content (mass%) of compounds HT-1 and HT-2 in the first hole transport layer. The percentages (97%: 3%) represent the ratio (mass%) of the host material (compound BH1-1 or compound BH2) and the dopant material (compound BD-1 or compound BD-2) in the first or second emissive layer. The percentages (50%: 50%) represent the content (mass%) of compounds ET-1 and ET-2 in the first electron transport layer.

[1853] [Comparative Example 1-1]

[1854] The organic EL element of Comparative Example 1-1 was fabricated in the same manner as in Example 1, except that, as shown in Table 1, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1855] [Comparative Examples 1-2]

[1856] The organic EL elements of Comparative Examples 1-2 were fabricated in the same manner as in Example 1, except that a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer as shown in Table 1.

[1857] [Examples 1-3, 1-4 and 1-5]

[1858] The organic EL elements of Examples 1-3, 1-4 and 1-5 were each fabricated in the same manner as in Example 1, except that the compounds used in the first and second light-emitting layers of Example 1 were changed to the compounds listed in Table 1 to form the first and second light-emitting layers.

[1859] <Fabrication of Organic EL Components 2>

[1860] [Example 2]

[1861] The organic EL element of Example 2 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 1 to form the first light-emitting layer.

[1862] [Comparative Example 2-1]

[1863] The organic EL element of Comparative Example 2-1 was fabricated in the same manner as in Example 2, except that, as shown in Table 1, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1864] [Comparative Example 2-2]

[1865] The organic EL element of Comparative Example 2-2 was fabricated in the same manner as in Example 2, except that a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer as shown in Table 1.

[1866] [Examples 2-3, 2-4 and 2-5]

[1867] The organic EL elements of Examples 2-3, 2-4 and 2-5 were each fabricated in the same manner as in Example 2, except that the compounds used in the first and second light-emitting layers of Example 2 were changed to the compounds listed in Table 1 to form the first and second light-emitting layers, as shown in Table 1.

[1868] <Fabrication of Organic EL Components 3>

[1869] [Example 3]

[1870] The organic EL element of Example 3 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 2 to form the first light-emitting layer.

[1871] [Comparative Example 3-1]

[1872] The organic EL element of Comparative Example 3-1 was fabricated in the same manner as in Example 3, except that, as shown in Table 2, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1873] [Comparative Example 3-2]

[1874] The organic EL element of Comparative Example 3-2 was fabricated in the same manner as in Example 3, except that a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer as shown in Table 2.

[1875] [Examples 3-3, 3-4 and 3-5]

[1876] The organic EL elements of Examples 3-3, 3-4 and 3-5 were each fabricated in the same manner as in Example 3, except that the compounds used in the first and second light-emitting layers of Example 3 were changed to the compounds listed in Table 2 to form the first and second light-emitting layers.

[1877] <Fabrication of Organic EL Components 4>

[1878] [Example 4]

[1879] The organic EL element of Example 4 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 2 to form the first light-emitting layer.

[1880] [Comparative Example 4-1]

[1881] The organic EL element of Comparative Example 4-1 was fabricated in the same manner as in Example 4, except that, as shown in Table 2, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1882] [Comparative Example 4-2]

[1883] The organic EL element of Comparative Example 4-2 was fabricated in the same manner as in Example 4, except that a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer as shown in Table 2.

[1884] [Examples 4-3, 4-4 and 4-5]

[1885] The organic EL elements of Examples 4-3, 4-4 and 4-5 were each fabricated in the same manner as in Example 4, except that the compounds used in the first and second light-emitting layers of Example 4 were changed to the compounds listed in Table 2 to form the first and second light-emitting layers.

[1886] <Fabrication of Organic EL Components 5>

[1887] [Example 5]

[1888] The organic EL element of Example 5 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 3 to form the first light-emitting layer.

[1889] [Comparative Example 5-1]

[1890] The organic EL element of Comparative Example 5-1 was fabricated in the same manner as in Example 5, except that, as shown in Table 3, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1891] [Comparative Example 5-2]

[1892] The organic EL element of Comparative Example 5-2 was fabricated in the same manner as in Example 5, except that, as shown in Table 3, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[1893] [Examples 5-3, 5-4 and 5-5]

[1894] The organic EL elements of Examples 5-3, 5-4 and 5-5 were each fabricated in the same manner as in Example 5, except that the compounds used in the first and second light-emitting layers of Example 5 were changed to the compounds listed in Table 3 to form the first and second light-emitting layers.

[1895] <Fabrication of Organic EL Components 6>

[1896] [Example 6]

[1897] The organic EL element of Example 6 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 3 to form the first light-emitting layer.

[1898] [Comparative Example 6-1]

[1899] The organic EL element of Comparative Example 6-1 was fabricated in the same manner as in Example 6, except that, as shown in Table 3, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1900] [Comparative Example 6-2]

[1901] The organic EL element of Comparative Example 6-2 was fabricated in the same manner as in Example 6, except that, as shown in Table 3, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[1902] [Examples 6-3, 6-4 and 6-5]

[1903] The organic EL elements of Examples 6-3, 6-4 and 6-5 were each fabricated in the same manner as in Example 6, except that the compounds used in the first and second light-emitting layers of Example 6 were changed to the compounds listed in Table 3 to form the first and second light-emitting layers, as shown in Table 3.

[1904] <Fabrication of Organic EL Components 7>

[1905] [Example 7]

[1906] The organic EL element of Example 7 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 4 to form the first light-emitting layer.

[1907] [Comparative Example 7-1]

[1908] The organic EL element of Comparative Example 7-1 was fabricated in the same manner as in Example 7, except that, as shown in Table 4, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1909] [Comparative Example 7-2]

[1910] The organic EL element of Comparative Example 7-2 was fabricated in the same manner as in Example 7, except that, as shown in Table 4, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[1911] [Examples 7-3, 7-4 and 7-5]

[1912] The organic EL elements of Examples 7-3, 7-4 and 7-5 were each fabricated in the same manner as in Example 7, except that the compounds used in the first and second light-emitting layers of Example 7 were changed to the compounds listed in Table 4 to form the first and second light-emitting layers.

[1913] <Fabrication of Organic EL Components 8>

[1914] [Example 8]

[1915] The organic EL element of Example 8 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 4 to form the first light-emitting layer.

[1916] [Comparative Example 8-1]

[1917] The organic EL element of Comparative Example 8-1 was fabricated in the same manner as in Example 8, except that, as shown in Table 4, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1918] [Comparative Example 8-2]

[1919] The organic EL element of Comparative Example 8-2 was fabricated in the same manner as in Example 8, except that, as shown in Table 4, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[1920] [Examples 8-3, 8-4 and 8-5]

[1921] The organic EL elements of Examples 8-3, 8-4 and 8-5 were each fabricated in the same manner as in Example 8, except that the compounds used in the first and second light-emitting layers of Example 8 were changed to the compounds listed in Table 4 to form the first and second light-emitting layers.

[1922] <Fabrication of Organic EL Components 9>

[1923] [Example 9]

[1924] The organic EL element of Example 9 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 5 to form the first light-emitting layer.

[1925] [Comparative Example 9-1]

[1926] The organic EL element of Comparative Example 9-1 was fabricated in the same manner as in Example 9, except that, as shown in Table 5, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1927] [Comparative Example 9-2]

[1928] The organic EL element of Comparative Example 9-2 was fabricated in the same manner as in Example 9, except that, as shown in Table 5, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[1929] [Examples 9-3, 9-4 and 9-5]

[1930] The organic EL elements of Examples 9-3, 9-4 and 9-5 were each fabricated in the same manner as in Example 9, except that the compounds used in the first and second light-emitting layers of Example 9 were changed to the compounds listed in Table 5 to form the first and second light-emitting layers, as shown in Table 5.

[1931] <Fabrication of Organic EL Components 10>

[1932] [Example 10]

[1933] The organic EL element of Example 10 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 5 to form the first light-emitting layer.

[1934] [Comparative Example 10-1]

[1935] The organic EL element of Comparative Example 10-1 was fabricated in the same manner as in Example 10, except that, as shown in Table 5, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1936] [Comparative Example 10-2]

[1937] The organic EL element of Comparative Example 10-2 was fabricated in the same manner as in Example 10, except that, as shown in Table 5, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[1938] [Examples 10-3, 10-4 and 10-5]

[1939] The organic EL elements of Examples 10-3, 10-4 and 10-5 were fabricated in the same manner as in Example 10, except that the compounds used in the first and second light-emitting layers of Example 10 were changed to the compounds listed in Table 5 to form the first and second light-emitting layers, as shown in Table 5.

[1940] <Fabrication of Organic EL Components 11>

[1941] [Example 11]

[1942] The organic EL element of Example 11 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 6 to form the first light-emitting layer.

[1943] [Comparative Example 11-1]

[1944] The organic EL element of Comparative Example 11-1 was fabricated in the same manner as in Example 11, except that, as shown in Table 6, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1945] [Comparative Example 11-2]

[1946] The organic EL elements of Comparative Examples 11-2 were fabricated in the same manner as those of Example 11, except that, as shown in Table 6, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[1947] [Examples 11-3, 11-4 and 11-5]

[1948] The organic EL elements of Comparative Examples 11-3, 11-4 and 11-5 were each fabricated in the same manner as in Example 11, except that the compounds used in the first and second light-emitting layers of Example 11 were changed to the compounds listed in Table 6 to form the first and second light-emitting layers, as shown in Table 6.

[1949] <Fabrication of Organic EL Components 12>

[1950] [Example 12]

[1951] The organic EL element of Example 12 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 6 to form the first light-emitting layer.

[1952] [Comparative Example 12-1]

[1953] The organic EL element of Comparative Example 12-1 was fabricated in the same manner as in Example 12, except that, as shown in Table 6, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1954] [Comparative Example 12-2]

[1955] The organic EL element of Comparative Example 12-2 was fabricated in the same manner as in Example 12, except that, as shown in Table 6, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[1956] [Examples 12-3, 12-4 and 12-5]

[1957] The organic EL elements of Examples 12-3, 12-4 and 12-5 were each fabricated in the same manner as in Example 12, except that the compounds used in the first and second light-emitting layers of Example 12 were changed to the compounds listed in Table 6 to form the first and second light-emitting layers, as shown in Table 6.

[1958] <Fabrication of Organic EL Components 13>

[1959] [Example 13]

[1960] The organic EL element of Example 13 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 7 to form the first light-emitting layer.

[1961] [Comparative Example 13-1]

[1962] The organic EL element of Comparative Example 13-1 was fabricated in the same manner as in Example 13, except that, as shown in Table 7, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1963] [Comparative Example 13-2]

[1964] The organic EL element of Comparative Example 13-2 was fabricated in the same manner as in Example 13, except that, as shown in Table 7, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[1965] [Examples 13-3, 13-4 and 13-5]

[1966] The organic EL elements of Examples 13-3, 13-4 and 13-5 were each fabricated in the same manner as in Example 13, except that the compounds used in the first and second light-emitting layers of Example 13 were changed to the compounds listed in Table 7 to form the first and second light-emitting layers, as shown in Table 7.

[1967] <Fabrication of Organic EL Components 14>

[1968] [Example 14]

[1969] The organic EL element of Example 14 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 7 to form the first light-emitting layer.

[1970] [Comparative Example 14-1]

[1971] The organic EL element of Comparative Example 14-1 was fabricated in the same manner as in Example 14, except that, as shown in Table 7, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1972] [Comparative Example 14-2]

[1973] The organic EL element of Comparative Example 14-2 was fabricated in the same manner as in Example 14, except that, as shown in Table 7, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[1974] [Examples 14-3, 14-4 and 14-5]

[1975] The organic EL elements of Examples 14-3, 14-4 and 14-5 were fabricated in the same manner as in Example 14, except that the compounds used in the first and second light-emitting layers of Example 14 were changed to the compounds listed in Table 7 to form the first and second light-emitting layers, as shown in Table 7.

[1976] <Fabrication of Organic EL Components 15>

[1977] [Example 15]

[1978] The organic EL element of Example 15 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 8 to form the first light-emitting layer.

[1979] [Comparative Example 15-1]

[1980] The organic EL element of Comparative Example 15-1 was fabricated in the same manner as in Example 15, except that, as shown in Table 8, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1981] [Comparative Example 15-2]

[1982] The organic EL element of Comparative Example 15-2 was fabricated in the same manner as in Example 15, except that, as shown in Table 8, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[1983] [Examples 15-3, 15-4 and 15-5]

[1984] The organic EL elements of Examples 15-3, 15-4 and 15-5 were fabricated in the same manner as in Example 15, except that the compounds used in the first and second light-emitting layers of Example 15 were changed to the compounds listed in Table 8 to form the first and second light-emitting layers.

[1985] <Fabrication of Organic EL Components 16>

[1986] [Example 16]

[1987] The organic EL element of Example 16 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 8 to form the first light-emitting layer.

[1988] [Comparative Example 16-1]

[1989] The organic EL element of Comparative Example 16-1 was fabricated in the same manner as in Example 16, except that, as shown in Table 8, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1990] [Comparative Example 16-2]

[1991] The organic EL element of Comparative Example 16-2 was fabricated in the same manner as in Example 16, except that, as shown in Table 8, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[1992] [Examples 16-3, 16-4 and 16-5]

[1993] The organic EL elements of Examples 16-3, 16-4 and 16-5 were fabricated in the same manner as in Example 16, except that the compounds used in the first and second light-emitting layers of Example 16 were changed to the compounds listed in Table 8 to form the first and second light-emitting layers, as shown in Table 8.

[1994] <Fabrication of Organic EL Components 17>

[1995] [Example 17]

[1996] The organic EL element of Example 17 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 9 to form the first light-emitting layer.

[1997] [Comparative Example 17-1]

[1998] The organic EL element of Comparative Example 17-1 was fabricated in the same manner as in Example 17, except that, as shown in Table 9, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[1999] [Comparative Example 17-2]

[2000] The organic EL element of Comparative Example 17-2 was fabricated in the same manner as in Example 17, except that, as shown in Table 9, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2001] [Examples 17-3, 17-4 and 17-5]

[2002] The organic EL elements of Examples 17-3, 17-4 and 17-5 were each fabricated in the same manner as in Example 17, except that the compounds used in the first and second light-emitting layers of Example 17 were changed to the compounds listed in Table 9 to form the first and second light-emitting layers, as shown in Table 9.

[2003] <Fabrication of Organic EL Components 18>

[2004] [Example 18]

[2005] The organic EL element of Example 18 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 9 to form the first light-emitting layer.

[2006] [Comparative Example 18-1]

[2007] The organic EL element of Comparative Example 18-1 was fabricated in the same manner as in Example 18, except that, as shown in Table 9, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2008] [Comparative Example 18-2]

[2009] The organic EL element of Comparative Example 18-2 was fabricated in the same manner as in Example 18, except that, as shown in Table 9, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2010] [Examples 18-3, 18-4 and 18-5]

[2011] The organic EL elements of Examples 18-3, 18-4 and 18-5 were each fabricated in the same manner as in Example 18, except that the compounds used in the first and second light-emitting layers of Example 18 were changed to the compounds listed in Table 9 to form the first and second light-emitting layers, as shown in Table 9.

[2012] <Fabrication of Organic EL Components 19>

[2013] [Example 19]

[2014] The organic EL element of Example 19 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 10 to form the first light-emitting layer.

[2015] [Comparative Example 19-1]

[2016] The organic EL element of Comparative Example 19-1 was fabricated in the same manner as in Example 19, except that, as shown in Table 10, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2017] [Comparative Example 19-2]

[2018] The organic EL element of Comparative Example 19-2 was fabricated in the same manner as in Example 19, except that, as shown in Table 10, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2019] [Examples 19-3, 19-4 and 19-5]

[2020] The organic EL elements of Examples 19-3, 19-4 and 19-5 were each fabricated in the same manner as in Example 19, except that the compounds used in the first and second light-emitting layers of Example 19 were changed to the compounds listed in Table 10 to form the first and second light-emitting layers, as shown in Table 10.

[2021] <Fabrication of Organic EL Components 20>

[2022] [Example 20]

[2023] The organic EL element of Example 20 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 10 to form the first light-emitting layer.

[2024] [Comparative Example 20-1]

[2025] The organic EL element of Comparative Example 20-1 was fabricated in the same manner as in Example 20, except that, as shown in Table 10, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2026] [Comparative Example 20-2]

[2027] The organic EL element of Comparative Example 20-2 was fabricated in the same manner as in Example 20, except that, as shown in Table 10, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2028] [Examples 20-3, 20-4 and 20-5]

[2029] The organic EL elements of Examples 20-3, 20-4 and 20-5 were each fabricated in the same manner as in Example 20, except that the compounds used in the first and second light-emitting layers of Example 20 were changed to the compounds listed in Table 10 to form the first and second light-emitting layers, as shown in Table 10.

[2030] <Fabrication of Organic EL Components 21>

[2031] [Example 21]

[2032] The organic EL element of Example 21 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 11 to form the first light-emitting layer.

[2033] [Comparative Example 21-1]

[2034] The organic EL element of Comparative Example 21-1 was fabricated in the same manner as in Example 21, except that, as shown in Table 11, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2035] [Comparative Example 21-2]

[2036] The organic EL element of Comparative Example 21-2 was fabricated in the same manner as in Example 21, except that, as shown in Table 11, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2037] [Examples 21-3, 21-4 and 21-5]

[2038] The organic EL elements of Examples 21-3, 21-4 and 21-5 were each fabricated in the same manner as in Example 21, except that the compounds used in the first and second light-emitting layers of Example 21 were changed to the compounds listed in Table 11 to form the first and second light-emitting layers, as shown in Table 11.

[2039] <Fabrication of Organic EL Components 22>

[2040] [Example 22]

[2041] The organic EL element of Example 22 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 11 to form the first light-emitting layer.

[2042] [Comparative Example 22-1]

[2043] The organic EL element of Comparative Example 22-1 was fabricated in the same manner as in Example 22, except that, as shown in Table 11, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2044] [Comparative Example 22-2]

[2045] The organic EL element of Comparative Example 22-2 was fabricated in the same manner as in Example 22, except that, as shown in Table 11, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2046] [Examples 22-3, 22-4 and 22-5]

[2047] The organic EL elements of Examples 22-3, 22-4 and 22-5 were each fabricated in the same manner as in Example 22, except that the compounds used in the first and second light-emitting layers of Example 22 were changed to the compounds listed in Table 11 to form the first and second light-emitting layers, as shown in Table 11.

[2048] <Fabrication of Organic EL Components 23>

[2049] [Example 23]

[2050] The organic EL element of Example 23 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 12 to form the first light-emitting layer.

[2051] [Comparative Example 23-1]

[2052] The organic EL element of Comparative Example 23-1 was fabricated in the same manner as in Example 23, except that, as shown in Table 12, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2053] [Comparative Example 23-2]

[2054] The organic EL element of Comparative Example 23-2 was fabricated in the same manner as in Example 23, except that, as shown in Table 12, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2055] [Examples 23-3, 23-4 and 23-5]

[2056] The organic EL elements of Examples 23-3, 23-4 and 23-5 were each fabricated in the same manner as in Example 23, except that the compounds used in the first and second light-emitting layers of Example 23 were changed to the compounds listed in Table 12 to form the first and second light-emitting layers, as shown in Table 12.

[2057] <Fabrication of Organic EL Components 24>

[2058] [Example 24]

[2059] The organic EL element of Example 24 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 12 to form the first light-emitting layer.

[2060] [Comparative Example 24-1]

[2061] The organic EL element of Comparative Example 24-1 was fabricated in the same manner as in Example 24, except that, as shown in Table 12, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2062] [Comparative Example 24-2]

[2063] The organic EL element of Comparative Example 24-2 was fabricated in the same manner as in Example 24, except that, as shown in Table 12, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2064] [Examples 24-3, 24-4 and 24-5]

[2065] The organic EL elements of Examples 24-3, 24-4 and 24-5 were each fabricated in the same manner as in Example 24, except that the compounds used in the first and second light-emitting layers of Example 24 were changed to the compounds listed in Table 12 to form the first and second light-emitting layers, as shown in Table 12.

[2066] <Fabrication of Organic EL Components 25>

[2067] [Example 25]

[2068] The organic EL element of Example 25 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 13 to form the first light-emitting layer.

[2069] [Comparative Example 25-1]

[2070] The organic EL element of Comparative Example 25-1 was fabricated in the same manner as in Example 25, except that, as shown in Table 13, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2071] [Comparative Example 25-2]

[2072] The organic EL element of Comparative Example 25-2 was fabricated in the same manner as in Example 25, except that, as shown in Table 13, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2073] [Examples 25-3, 25-4 and 25-5]

[2074] The organic EL elements of Examples 25-3, 25-4 and 25-5 were each fabricated in the same manner as in Example 25, except that the compounds used in the first and second light-emitting layers of Example 25 were changed to the compounds listed in Table 13 to form the first and second light-emitting layers, as shown in Table 13.

[2075] <Fabrication of Organic EL Components 26>

[2076] [Example 26]

[2077] The organic EL element of Example 26 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 13 to form the first light-emitting layer.

[2078] [Comparative Example 26-1]

[2079] The organic EL element of Comparative Example 26-1 was fabricated in the same manner as in Example 26, except that, as shown in Table 13, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2080] [Comparative Example 26-2]

[2081] The organic EL element of Comparative Example 26-2 was fabricated in the same manner as in Example 26, except that, as shown in Table 13, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2082] [Examples 26-3, 26-4 and 26-5]

[2083] The organic EL elements of Examples 26-3, 26-4 and 26-5 were each fabricated in the same manner as in Example 26, except that the compounds used in the first and second light-emitting layers of Example 26 were changed to the compounds listed in Table 13 to form the first and second light-emitting layers, as shown in Table 13.

[2084] <Fabrication of Organic EL Components 27>

[2085] [Example 27]

[2086] The organic EL element of Example 27 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 14 to form the first light-emitting layer.

[2087] [Comparative Example 27-1]

[2088] The organic EL element of Comparative Example 27-1 was fabricated in the same manner as in Example 27, except that, as shown in Table 14, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2089] [Comparative Example 27-2]

[2090] The organic EL element of Comparative Example 27-2 was fabricated in the same manner as in Example 27, except that, as shown in Table 14, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2091] [Examples 27-3, 27-4 and 27-5]

[2092] The organic EL elements of Examples 27-3, 27-4 and 27-5 were each fabricated in the same manner as in Example 27, except that the compounds used in the first and second light-emitting layers of Example 27 were changed to the compounds listed in Table 14 to form the first and second light-emitting layers, as shown in Table 14.

[2093] <Fabrication of Organic EL Components 28>

[2094] [Example 28]

[2095] The organic EL element of Example 28 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 14 to form the first light-emitting layer.

[2096] [Comparative Example 28-1]

[2097] The organic EL element of Comparative Example 28-1 was fabricated in the same manner as in Example 28, except that, as shown in Table 14, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2098] [Comparative Example 28-2]

[2099] The organic EL element of Comparative Example 28-2 was fabricated in the same manner as in Example 28, except that, as shown in Table 14, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2100] [Examples 28-3, 28-4 and 28-5]

[2101] The organic EL elements of Examples 28-3, 28-4 and 28-5 were each fabricated in the same manner as in Example 28, except that the compounds used in the first and second light-emitting layers of Example 28 were changed to the compounds listed in Table 14 to form the first and second light-emitting layers, as shown in Table 14.

[2102] <Fabrication of Organic EL Components 29>

[2103] [Example 29]

[2104] The organic EL element of Example 29 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 15 to form the first light-emitting layer.

[2105] [Comparative Example 29-1]

[2106] The organic EL element of Comparative Example 29-1 was fabricated in the same manner as in Example 29, except that, as shown in Table 15, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2107] [Comparative Example 29-2]

[2108] The organic EL element of Comparative Example 29-2 was fabricated in the same manner as in Example 29, except that, as shown in Table 15, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2109] [Examples 29-3, 29-4 and 29-5]

[2110] The organic EL elements of Examples 29-3, 29-4 and 29-5 were each fabricated in the same manner as in Example 29, except that the compounds used in the first and second light-emitting layers of Example 29 were changed to the compounds listed in Table 15 to form the first and second light-emitting layers, as shown in Table 15.

[2111] <Fabrication of Organic EL Components 30>

[2112] [Example 30]

[2113] The organic EL element of Example 30 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 15 to form the first light-emitting layer.

[2114] [Comparative Example 30-1]

[2115] The organic EL element of Comparative Example 30-1 was fabricated in the same manner as in Example 30, except that, as shown in Table 15, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2116] [Comparative Example 30-2]

[2117] The organic EL element of Comparative Example 30-2 was fabricated in the same manner as in Example 30, except that, as shown in Table 15, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2118] [Examples 30-3, 30-4 and 30-5]

[2119] The organic EL elements of Examples 30-3, 30-4 and 30-5 were each fabricated in the same manner as in Example 30, except that the compounds used in the first and second light-emitting layers of Example 30 were changed to the compounds listed in Table 15 to form the first and second light-emitting layers, as shown in Table 15.

[2120] <Fabrication of Organic EL Components 31>

[2121] [Example 31]

[2122] The organic EL element of Example 31 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 16 to form the first light-emitting layer.

[2123] [Comparative Example 31-1]

[2124] The organic EL element of Comparative Example 31-1 was fabricated in the same manner as in Example 31, except that, as shown in Table 16, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2125] [Comparative Example 31-2]

[2126] The organic EL element of Comparative Example 31-2 was fabricated in the same manner as in Example 31, except that, as shown in Table 16, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2127] [Examples 31-3, 31-4 and 31-5]

[2128] The organic EL elements of Examples 31-3, 31-4 and 31-5 were each fabricated in the same manner as in Example 31, except that the compounds used in the first and second light-emitting layers of Example 31 were changed to the compounds listed in Table 16 to form the first and second light-emitting layers, as shown in Table 16.

[2129] <Fabrication of Organic EL Components 32>

[2130] [Example 32]

[2131] The organic EL element of Example 32 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 16 to form the first light-emitting layer.

[2132] [Comparative Example 32-1]

[2133] The organic EL element of Comparative Example 32-1 was fabricated in the same manner as in Example 32, except that, as shown in Table 16, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2134] [Comparative Example 32-2]

[2135] The organic EL element of Comparative Example 32-2 was fabricated in the same manner as in Example 32, except that, as shown in Table 16, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2136] [Examples 32-3, 32-4 and 32-5]

[2137] The organic EL elements of Examples 32-3, 32-4 and 32-5 were fabricated in the same manner as in Example 32, except that the compounds used in the first and second light-emitting layers of Example 32 were changed to the compounds listed in Table 16 to form the first and second light-emitting layers, as shown in Table 16.

[2138] <Fabrication of Organic EL Components 33>

[2139] [Example 33]

[2140] The organic EL element of Example 33 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 17 to form the first light-emitting layer.

[2141] [Comparative Example 33-1]

[2142] The organic EL element of Comparative Example 33-1 was fabricated in the same manner as in Example 33, except that, as shown in Table 17, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2143] [Comparative Example 33-2]

[2144] The organic EL element of Comparative Example 33-2 was fabricated in the same manner as in Example 33, except that, as shown in Table 17, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2145] [Examples 33-3, 33-4 and 33-5]

[2146] The organic EL elements of Examples 33-3, 33-4 and 33-5 were each fabricated in the same manner as in Example 33, except that the compounds used in the first and second light-emitting layers of Example 33 were changed to the compounds listed in Table 17 to form the first and second light-emitting layers, as shown in Table 17.

[2147] <Fabrication of Organic EL Components 34>

[2148] [Example 34]

[2149] The organic EL element of Example 34 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 17 to form the first light-emitting layer.

[2150] [Comparative Example 34-1]

[2151] The organic EL element of Comparative Example 34-1 was fabricated in the same manner as in Example 34, except that, as shown in Table 17, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2152] [Comparative Example 34-2]

[2153] The organic EL element of Comparative Example 34-2 was fabricated in the same manner as in Example 34, except that, as shown in Table 17, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2154] [Examples 34-3, 34-4 and 34-5]

[2155] The organic EL elements of Examples 34-3, 34-4 and 34-5 were each fabricated in the same manner as in Example 34, except that the compounds used in the first and second light-emitting layers of Example 34 were changed to the compounds listed in Table 17 to form the first and second light-emitting layers, as shown in Table 17.

[2156] <Fabrication of Organic EL Components 35>

[2157] [Example 35]

[2158] The organic EL element of Example 35 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 18 to form the first light-emitting layer.

[2159] [Comparative Example 35-1]

[2160] The organic EL element of Comparative Example 35-1 was fabricated in the same manner as in Example 35, except that, as shown in Table 18, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2161] [Comparative Example 35-2]

[2162] The organic EL element of Comparative Example 35-2 was fabricated in the same manner as in Example 35, except that, as shown in Table 18, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2163] [Examples 35-3, 35-4 and 35-5]

[2164] The organic EL elements of Examples 35-3, 35-4 and 35-5 were each fabricated in the same manner as in Example 35, except that the compounds used in the first and second light-emitting layers of Example 35 were changed to the compounds listed in Table 18 to form the first and second light-emitting layers, as shown in Table 18.

[2165] <Fabrication of Organic EL Components 36>

[2166] [Example 36]

[2167] The organic EL element of Example 36 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 18 to form the first light-emitting layer.

[2168] [Comparative Example 36-1]

[2169] The organic EL element of Comparative Example 36-1 was fabricated in the same manner as in Example 36, except that, as shown in Table 18, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2170] [Comparative Example 36-2]

[2171] The organic EL element of Comparative Example 36-2 was fabricated in the same manner as in Example 36, except that, as shown in Table 18, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2172] [Examples 36-3, 36-4 and 36-5]

[2173] The organic EL elements of Examples 36-3, 36-4 and 36-5 were each fabricated in the same manner as in Example 36, except that the compounds used in the first and second light-emitting layers of Example 36 were changed to the compounds listed in Table 18 to form the first and second light-emitting layers, as shown in Table 18.

[2174] <Fabrication of Organic EL Components 37>

[2175] [Example 37]

[2176] The organic EL element of Example 37 was fabricated in the same manner as in Example 1, except that the compound used in the first light-emitting layer of Example 1 was changed to the compound listed in Table 19 to form the first light-emitting layer.

[2177] [Comparative Example 37-1]

[2178] The organic EL element of Comparative Example 37-1 was fabricated in the same manner as in Example 37, except that, as shown in Table 19, no first light-emitting layer was formed, but compound BH2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2179] [Comparative Example 37-2]

[2180] The organic EL element of Comparative Example 37-2 was fabricated in the same manner as in Example 37, except that, as shown in Table 19, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2181] [Examples 37-3, 37-4 and 37-5]

[2182] The organic EL elements of Examples 37-3, 37-4 and 37-5 were each fabricated in the same manner as in Example 37, except that the compounds used in the first and second light-emitting layers of Example 37 were changed to the compounds listed in Table 19 to form the first and second light-emitting layers, as shown in Table 19.

[2183] <Fabrication of Organic EL Components 38>

[2184] [Example 38]

[2185] The organic EL element of Example 38 was fabricated in the same manner as in Example 1, except that the compounds used in the first and second light-emitting layers of Example 1 were changed to the compounds listed in Table 20 to form the first and second light-emitting layers.

[2186] [Comparative Example 38-1]

[2187] The organic EL element of Comparative Example 38-1 was fabricated in the same manner as in Example 38, except that, as shown in Table 20, no first light-emitting layer was formed, but compound BH2-2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2188] [Comparative Example 38-2]

[2189] The organic EL element of Comparative Example 38-2 was fabricated in the same manner as in Example 38, except that, as shown in Table 20, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2190] [Examples 38-3, 38-4 and 38-5]

[2191] The organic EL elements of Examples 38-3, 38-4 and 38-5 were each fabricated in the same manner as in Example 38, except that the compounds used in the first and second light-emitting layers of Example 38 were changed to the compounds listed in Table 20 to form the first and second light-emitting layers, as shown in Table 20.

[2192] <Fabrication of Organic EL Components 39>

[2193] [Example 39]

[2194] The organic EL element of Example 39 was fabricated in the same manner as in Example 1, except that the compounds used in the first and second light-emitting layers of Example 1 were changed to the compounds listed in Table 20 to form the first and second light-emitting layers, as shown in Table 20.

[2195] [Comparative Example 39-1]

[2196] The organic EL element of Comparative Example 39-1 was fabricated in the same manner as in Example 39, except that, as shown in Table 20, no first light-emitting layer was formed, but compound BH2-3 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2197] [Comparative Example 39-2]

[2198] The organic EL element of Comparative Example 39-2 was fabricated in the same manner as in Example 39, except that, as shown in Table 20, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2199] [Examples 39-3, 39-4 and 39-5]

[2200] The organic EL elements of Examples 39-3, 39-4 and 39-5 were each fabricated in the same manner as in Example 39, except that the compounds used in the first and second light-emitting layers of Example 39 were changed to the compounds listed in Table 20 to form the first and second light-emitting layers, as shown in Table 20.

[2201] <Fabrication of Organic EL Components 40>

[2202] [Example 40]

[2203] The organic EL element of Example 40 was fabricated in the same manner as in Example 1, except that the compounds used in the first and second light-emitting layers of Example 1 were changed to the compounds listed in Table 21 to form the first and second light-emitting layers.

[2204] [Comparative Example 40-1]

[2205] The organic EL element of Comparative Example 40-1 was fabricated in the same manner as in Example 40, except that, as shown in Table 21, no first light-emitting layer was formed, but compound BH2-4 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer to form a second light-emitting layer with a film thickness of 30 nm.

[2206] [Comparative Example 40-2]

[2207] The organic EL element of Comparative Example 40-2 was fabricated in the same manner as in Example 40, except that, as shown in Table 21, a second light-emitting layer with a thickness of 30 nm was formed on top of the second hole transport layer instead of a first light-emitting layer.

[2208] [Examples 40-3, 40-4 and 40-5]

[2209] The organic EL elements of Examples 40-3, 40-4 and 40-5 were each fabricated in the same manner as in Example 40, except that the compounds used in the first and second light-emitting layers of Example 40 were changed to the compounds listed in Table 21 to form the first and second light-emitting layers, as shown in Table 21.

[2210] <Fabrication of Organic EL Components 41>

[2211] [Example 41]

[2212] The organic EL element of Example 41 was fabricated in the same manner as in Example 1, except that the compounds used in the first and second light-emitting layers of Example 1 were changed to the compounds listed in Table 21 to form the first and second light-emitting layers.

[2213] [Comparative Example 41-1]

[2214] The organic EL element of Comparative Example 41-1 was fabricated in the same manner as in Example 41, except that, as shown in Table 21, no first light-emitting layer was formed, but compound BH2-2 (second host material) and compound BD-1 (second dopant material) were co-deposited on the second hole transport layer t...

Claims

1. An organic electroluminescent element having anode, cathode, and The light-emitting region is located between the anode and the cathode. The anode, the light-emitting area, and the cathode are arranged in sequence. The light-emitting region includes a first light-emitting layer and a second light-emitting layer. The first light-emitting layer contains a first host material and a first dopant material. The second light-emitting layer contains a second host material and a second dopant material. The first dopant material is a compound selected from the group of polycyclic aromatic compounds represented by the following formula (DX). The first host material is a compound represented by formula (H1-1) or formula (H1-2) below. The first main material and the second main material are different from each other. The first dopant material and the second dopant material may be the same as or different from each other. In the given formula (DX), Rings a, b, and c are each independently... Substituted or unsubstituted aromatic hydrocarbon rings with 6 to 50 carbon atoms, or Heterocycles with 5 to 50 cyclic atoms, substituted or unsubstituted. Y 1 Boron atoms, phosphorus atoms, P=O, P=S, aluminum atoms, gallium atoms, arsenic atoms, Si-R 40 Or Ge-R 42 , R 40 and R 42 Each independently Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted. X 1 and X 2 Each independently consists of an oxygen atom and NR. 41 sulfur atoms or selenium atoms R 41 Bonded to ring a, ring b, or ring c to form substituted or unsubstituted monocyclic rings. Bonded to ring a, ring b, or ring c to form substituted or unsubstituted fused rings, or It is not bonded to rings a, b, and c. R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. 41 for Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted. Multiple R 41 They are the same or different. In the above formula (H1-1), R 150 ~R 159 Each independently hydrogen atom, Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms -Si(R 901 (R) 902 (R) 903 The groups shown in the figure, -O-(R 904 The groups shown in the figure, -S-(R 905 The groups shown in the figure, Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms -C(=O)R 801 The groups shown -COOR 802 The groups shown Halogen atoms, cyano, Nitro, Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms, or The group represented by formula (H150), in, R 150 ~R 159 At least one of them is a group represented by the formula (H150). When multiple groups represented by formula (H150) are present, the multiple groups represented by formula (H150) may be the same as or different from each other. L 151 for Substituted or unsubstituted arylene groups with 6 to 50 carbon atoms, or Divalent heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted. Ar 151 for Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted. mg is 0, 1, 2, 3, 4 or 5, When mg is 0, -(L 151 )0- indicates a single bond, In L 151 When there are more than two, more than two L 151 They are the same or different. In Ar 151 When there are more than two, more than two Ar 151 They are the same or different. In the formula (H150), * indicates the bonding position. In the above formula (H1-2), R 131 ~R 140 Ar 131 and Ar 132 Each independently hydrogen atom, Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms -Si(R 901 (R) 902 (R) 903 The groups shown in the figure, -O-(R 904 The groups shown in the figure, -S-(R 905 The groups shown in the figure, Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms -C(=O)R 801 The groups shown -COOR 802 The groups shown Halogen atoms, cyano, Nitro, Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms, or The group represented by formula (H131), Among them, R 131 ~R 140 Ar 131 and Ar 132 At least one of them is a group represented by the formula (H131). When multiple groups represented by formula (H131) are present, the multiple groups represented by formula (H131) may be the same as or different from each other. L 13 for Substituted or unsubstituted arylene groups with 6 to 50 carbon atoms, or Divalent heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted. Ar 13 for Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted. mb can be 0, 1, 2, 3, 4, or 5. When mb is 0, -(L 13 )0- indicates a single bond, In L 13 When there are more than two, more than two L 13 They are the same or different. In Ar 13 When there are more than two, more than two Ar 13 They are the same or different. In the formula (H131), * represents the bonding position. In the first main material, R 901 ~R 905 R 801 and R 802 Each independently hydrogen atom, Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted. In R 901 When multiple R exist, multiple R 901 They are the same or different. In R 902 When multiple R exist, multiple R 902 They are the same or different. In R 903 When multiple R exist, multiple R 903 They are the same or different. In R 904 When multiple R exist, multiple R 904 They are the same or different. In R 905 When multiple R exist, multiple R 905 They are the same or different. In R 801 When multiple R exist, multiple R 801 They are the same or different. In R 802 When multiple R exist, multiple R 802 They are the same or different.

2. The organic electroluminescent element according to claim 1, wherein, The first dopant material and the second dopant material are different compounds.

3. The organic electroluminescent element according to claim 1 or 2, wherein, Y in the formula (DX) 1 It contains boron atoms.

4. The organic electroluminescent element according to any one of claims 1 to 3, wherein, The first dopant material is a compound represented by the following formulas (Da), (Db), (Dc), (Dd), (De), (Df), (Dg), (Dh), (Di), (Dj), or (Dk). In the given equations (Da) to (Dk), By R a1 ~R a3 R b1 ~R b4 R x1 R x2 R c1 ~R c4 R g1 ~R g5 R m1 ~R m4 and R k1 ~R k3 One or more groups consisting of two or more adjacent elements. They bond together to form substituted or unsubstituted monocyclic rings. They bond together to form substituted or unsubstituted fused rings, or They do not bond with each other. R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. a1 ~R a3 R b1 ~R b4 R c1 ~R c4 R g1 ~R g5 R m1 ~R m4 and R k1 ~R k3 Each independently hydrogen atom, Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms -Si(R 301 (R) 302 (R) 303 The groups shown in the figure, -O-(R 304 The groups shown in the figure, -S-(R 305 The groups shown in the figure, -N(R 306 (R) 307 The groups shown in the figure, -B(R 308 (R) 309 The groups shown in the figure, Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms cyano, or Halogen atoms, R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. x1 and R x2 Each independently hydrogen atom, Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms -Si(R 301 (R) 302 (R) 303 The groups shown in the figure, -O-(R 304 The groups shown in the figure, -S-(R 305 The groups shown in the figure, -B(R 308 (R) 309 The groups shown in the figure, Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms cyano, or Halogen atoms, The meanings of Ar1, Ar2, and Ar3 are each independently related to R in the aforementioned formula (DX). 41 The meaning is the same. Z 1 for ＞O、 >N-R NZ 、 >C(-R CZ )2、 >Si(-R IZ )2、 >S, or >Se, Multiple Z 1 They are the same or different. >C(-R) CZ )2 of 2 R CZ They bond together to form substituted or unsubstituted monocyclic rings. They bond together to form substituted or unsubstituted fused rings, or They do not bond with each other. >Si(-R IZ )2 of 2 R IZ They bond together to form substituted or unsubstituted monocyclic rings. They bond together to form substituted or unsubstituted fused rings, or They do not bond with each other. R NZ R, which does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. CZ and R IZ Each independently hydrogen atom, Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms, or Substituted or unsubstituted cycloalkyl groups having 3 to 50 carbon atoms, Ring f is Substituted or unsubstituted aromatic hydrocarbon rings with 6 to 50 carbon atoms, or Substituted or unsubstituted aliphatic hydrocarbon rings with 5 to 50 carbon atoms Y 1 It is a single bond or a linking group. Y 2 It is a single bond or a linking group. Y 3 It is a single bond or a linking group. m is 0 or 1. n is 0 or 1, p is 0 or 1, The sum of n and p is 0 or 1. When m is 0, -(Y 1 )0- is not a single bond or linking group connecting ring f to ring b. When n is 0, -(Y 2 )0- is not a single bond or linking group connecting ring k and ring c. When p is 0, -(Y 3 )0- is not a single bond or linking group connecting ring k to ring a. Y as a linking group 1 Y 2 and Y 3 Each independently >C(-R Y )2、 ＞O、 >S, or >CO, The >C(-R) Y )2 of 2 R Y They bond together to form substituted or unsubstituted monocyclic rings. They bond together to form substituted or unsubstituted fused rings, or They do not bond with each other. R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. Y Each independently hydrogen atom, Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms -Si(R 301 (R) 302 (R) 303 The groups shown in the figure, -O-(R 304 The groups shown in the figure, -S-(R 305 The groups shown in the figure, -N(R 306 (R) 307 The groups shown in the figure, -B(R 308 (R) 309 The groups shown in the figure, Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms cyano, or Halogen atoms, In each of the formulas (Da) to (Dk), at least one of the aromatic hydrocarbon rings or heterocycles can be fused with at least one cycloalkane, wherein the cycloalkane can be substituted with at least one substituent, and at least one -CH2- in the cycloalkane can be replaced with -O-. At least one hydrogen atom in each of the formulas (Da) to (Dk) can be replaced by a halogen atom. In the first dopant material By R 306 and R 307 Groups Interconnected via linking group L N bonding, They are bonded together by single bonds, They do not bond with each other. By R 308 and R 309 Groups Interconnected via linking group L B bonding, They are bonded together by single bonds, They do not bond with each other. R 301 ~R 305 R, which does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. 306 ~R 309 Each independently hydrogen atom, Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted. In R 301 When multiple R exist, multiple R 301 They are the same or different. In R 302 When multiple R exist, multiple R 302 They are the same or different. In R 303 When multiple R exist, multiple R 303 They are the same or different. In R 304 When multiple R exist, multiple R 304 They are the same or different. In R 305 When multiple R exist, multiple R 305 They are the same or different. In R 306 When multiple R exist, multiple R 306 They are the same or different. In R 307 When multiple R exist, multiple R 307 They are the same or different. In R 308 When multiple R exist, multiple R 308 They are the same or different. In R 309 When multiple R exist, multiple R 309 They are the same or different. Linking group L N and linking group L B Each independently >C(-R F )2、 ＞O、 >S, or >CO, The >C(-R) F )2 of 2 R F They bond together to form substituted or unsubstituted monocyclic rings. They bond together to form substituted or unsubstituted fused rings, or They do not bond with each other. R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. F Each independently hydrogen atom, Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms, or Cycloalkyl groups, substituted or unsubstituted, having 3 to 50 carbon atoms.

5. The organic electroluminescent element according to any one of claims 1 to 4, wherein, The first dopant material is a compound represented by formula (D-a1), (D-a2), (D-a3), (D-a4), (D-a5), (D-a6), or (D-a7). In the equations (D-a1) to (D-a7), R a1 ~R a3 R b1 ~R b4 and R c1 ~R c4 The meanings are respectively related to R in the formula (Da). a1 ~R a3 R b1 ~R b4 and R c1 ~R c4 The meaning is the same. R x1 and R x2 The meanings are respectively related to R in the formula (Da). x1 and R x2 The meaning is the same. By R d1 ~R d4 and R e1 ~R e5 One or more groups consisting of two or more adjacent elements. They bond together to form substituted or unsubstituted monocyclic rings. They bond together to form substituted or unsubstituted fused rings, or They do not bond with each other. R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. d1 ~R d4 and R e1 ~R e5 Each independently hydrogen atom, Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms -Si(R 301 (R) 302 (R) 303 The groups shown in the figure, -O-(R 304 The groups shown in the figure, -S-(R 305 The groups shown in the figure, -N(R 306 (R) 307 The groups shown in the figure, -B(R 308 (R) 309 The groups shown in the figure, Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms cyano, or Halogen atoms, Me represents methyl.

6. The organic electroluminescent element according to any one of claims 1 to 4, wherein, The first dopant material is a compound represented by formula (D-b1), formula (D-b2), or formula (D-b3). In the equations (D-b1) to (D-b3), R a1 ~R a3 R b1 ~R b4 R c1 ~R c4 R x1 The meanings of Ar1 and Ar2 are respectively related to R in the above formula (Db). a1 ~R a3 R b1 ~R b4 R c1 ~R c4 R x1 Ar1 and Ar2 have the same meaning.

7. The organic electroluminescent element according to any one of claims 1 to 4, wherein, The first dopant material is a compound represented by formula (D-c1), (D-c2), (D-c3), or (D-c4). In the equations (D-c1) to (D-c4), R a1 ~R a3 R b1 ~R b4 R c1 ~R c4 R g1 ~R g5 The meanings of Ar1 and Ar2 are respectively related to R in the above formula (Dc). a1 ~R a3 R b1 ~R b4 R c1 ~R c4 R g1 ~R g5 Ar1 and Ar2 have the same meaning. Z 1 It is >S, >O, or >C(-CH3)2. By R h1 ~R h8 One or more groups consisting of two or more adjacent elements. They bond together to form substituted or unsubstituted monocyclic rings. They bond together to form substituted or unsubstituted fused rings, or They do not bond with each other. R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. h1 ~R h8 Each independently hydrogen atom, Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms -Si(R 301 (R) 302 (R) 303 The groups shown in the figure, -O-(R 304 The groups shown in the figure, -S-(R 305 The groups shown in the figure, -N(R 306 (R) 307 The groups shown in the figure, -B(R 308 (R) 309 The groups shown in the figure, Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms cyano, or Halogen atom.

8. The organic electroluminescent element according to any one of claims 1 to 4, wherein, The first dopant material is a compound represented by formula (D-d1), formula (D-d2), formula (D-d3), or formula (D-d4). In the equations (D-d1) to (D-d4), R a1 ~R a3 R b1 ~R b4 R c1 ~R c4 R g1 ~R g5 The meanings of Ar1 and Ar2 are independently related to R in the formula (Dd). a1 ~R a3 R b1 ~R b4 R c1 ~R c4 R g1 ~R g5 Ar1 and Ar2 have the same meaning. By R h1 ~R h8 One or more groups consisting of two or more adjacent elements. They bond together to form substituted or unsubstituted monocyclic rings. They bond together to form substituted or unsubstituted fused rings, or They do not bond with each other. R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. h1 ~R h8 Each independently hydrogen atom, Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms Substituted or unsubstituted heterocyclic groups with 5 to 50 cyclic atoms Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms -Si(R 301 (R) 302 (R) 303 The groups shown in the figure, -O-(R 304 The groups shown in the figure, -S-(R 305 The groups shown in the figure, -N(R 306 (R) 307 The groups shown in the figure, -B(R 308 (R) 309 The groups shown in the figure, Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms cyano, or Halogen atom.

9. The organic electroluminescent element according to any one of claims 1 to 8, wherein, The first host material is a compound represented by the following formula (H152). In the above formula (H152), R 150 ~R 152 and R 154 ~R 159 Each independently hydrogen atom, Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms -Si(R 901 (R) 902 (R) 903 The groups shown in the figure, -O-(R 904 The groups shown in the figure, -S-(R 905 The groups shown in the figure, Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms -C(=O)R 801 The groups shown -COOR 802 The groups shown Halogen atoms, cyano, Nitro, Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted. X 15 It consists of oxygen or sulfur atoms. L 151 for Substituted or unsubstituted arylene groups with 6 to 50 carbon atoms, or Divalent heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted. mg is 0, 1, 2, 3, 4 or 5, When mg is 0, -(L 151 )0- indicates a single bond, In L 151 When there are more than two, more than two L 151 They are the same or different. By R 1500 ~R 1504 One or more groups consisting of two or more adjacent elements. They bond together to form substituted or unsubstituted monocyclic rings. They may bond together to form substituted or unsubstituted fused rings, or they may not bond together at all. R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. 1500 ~R 1504 Each independently hydrogen atom, Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms -Si(R 901 (R) 902 (R) 903 The groups shown in the figure, -O-(R 904 The groups shown in the figure, -S-(R 905 The groups shown in the figure, Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms -C(=O)R 801 The groups shown -COOR 802 The groups shown Halogen atoms, cyano, Nitro, Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted. Multiple R 1500 They are the same or different. In the compound represented by formula (H152), R 901 ~R 905 R 801 and R 802 The meanings are respectively related to R in the above formula (H1-1) 901 ~R 905 R 801 and R 802 The meanings are the same.

10. The organic electroluminescent element according to any one of claims 1 to 8, wherein, The first host material is a compound represented by formula (H132) or formula (H133). In equations (H132) and (H133), R 131 ~R 140 Ar 131 and Ar 132 Each independently hydrogen atom, Substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms Substituted or unsubstituted alkyl halides with 1 to 50 carbon atoms Substituted or unsubstituted alkenyl groups with 2 to 50 carbon atoms Substituted or unsubstituted alkynyl groups with 2 to 50 carbon atoms Substituted or unsubstituted cycloalkyl groups with 3 to 50 carbon atoms -Si(R 901 (R) 902 (R) 903 The groups shown in the figure, -O-(R 904 The groups shown in the figure, -S-(R 905 The groups shown in the figure, Substituted or unsubstituted aralkyl groups with 7 to 50 carbon atoms -C(=O)R 801 The groups shown -COOR 802 The groups shown Halogen atoms, cyano, Nitro, Substituted or unsubstituted aryl groups with 6 to 50 carbon atoms, or Heterocyclic groups with 5 to 50 cyclic atoms, substituted or unsubstituted. L 13 Ar 13 The meanings of and mb are respectively the same as L in the above formula (H131). 13 Ar 13 It has the same meaning as mb. In the compounds represented by formulas (H132) and (H133), R 901 ~R 905 R 801 and R 802 The meanings are respectively related to R in the above formula (H1-2) 901 ~R 905 R 801 and R 802 The meanings are the same.

11. The organic electroluminescent element according to any one of claims 1 to 10, wherein, The first host material is a compound having one or more deuterium atoms.

12. The organic electroluminescent element according to any one of claims 1 to 11, wherein, The second host material is a compound having one or more deuterium atoms.

13. The organic electroluminescent element according to any one of claims 1 to 12, wherein, The first host material is a compound having one or more deuterium ions, and the second host material is a compound having one or more deuterium ions.

14. The organic electroluminescent element according to any one of claims 1 to 13, wherein, The first main material is a compound with a deuteration rate of over 80%.

15. The organic electroluminescent element according to any one of claims 1 to 14, wherein, The second main material is a compound with a deuteration rate of over 80%.

16. The organic electroluminescent element according to any one of claims 1 to 15, wherein, The first host material is a compound with a deuteration rate of 80% or higher, and the second host material is a compound with a deuteration rate of 80% or higher.

17. The organic electroluminescent element according to any one of claims 1 to 16, wherein, The first light-emitting layer does not contain metal complexes.

18. The organic electroluminescent element according to any one of claims 1 to 17, wherein, The second light-emitting layer does not contain metal complexes.

19. The organic electroluminescent element according to any one of claims 1 to 18, wherein, The first light-emitting layer and the second light-emitting layer are directly connected.

20. The organic electroluminescent element according to any one of claims 1 to 19, wherein, The first light-emitting layer is contained between the anode and the cathode. The second light-emitting layer is included between the first light-emitting layer and the cathode.

21. An electronic device comprising an organic electroluminescent element according to any one of claims 1 to 20.

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