Organic electroluminescence device, electronic device, composition and mixed powder

Abstract

To provide an organic EL element capable of maintaining luminous efficiency and extending its life.SOLUTION: An organic EL device 1 includes an emission region 5 and a first anode-side organic layer 61, the first anode-side organic layer 61 contains a first material, the emission region 5 includes a first emission layer 51 containing a first host material and a second host material and a second emission layer 52 containing a third host material, the energy levels HOMO(HT1), HOMO(H1) and HOMO(H2) of the highest occupied molecular orbitals of the first material, the first host material and the second host material satisfy the relationship of mathematical formula (A1), and the triplet energies T1(H1), T1(H2) and T1(H3) of the first host material, the second host material and the third host material satisfy the relationships of mathematical formulas (A2) and (A3). HOMO(HT1)>HOMO(H2)>HOMO(H1) (A1). T1(H1)>T1(H3) (A2). T1(H2)>T1(H3) (A3).SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an organic electroluminescence device, an electronic device, a composition, and a mixed powder. [Background technology]

[0002] Organic electroluminescence elements (hereinafter sometimes referred to as "organic EL elements") are applied to full-color displays such as mobile phones and televisions. When a voltage is applied to an organic EL element, 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 and electrons recombine to form excitons. At this time, according to the statistical laws of electron spin, singlet excitons are generated at a rate of 25% and triplet excitons are generated at a rate of 75%. In order to improve the performance of an organic EL element, for example, Patent Document 1 considers stacking a plurality of light-emitting layers. In addition, Patent Document 2 describes a phenomenon in which a singlet exciton is generated by the collision fusion of two triplet excitons (hereinafter, sometimes referred to as the Triplet-Triplet Fusion (TTF) phenomenon) in order to improve the performance of an organic EL element. The performance of an organic EL element includes, for example, luminance, emission wavelength, chromaticity, luminous efficiency, driving voltage, and life span. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] US Patent Application Publication No. 2019 / 280209 [Patent Document 2] International Publication No. 2010 / 134350 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide an organic electroluminescence element capable of maintaining luminous efficiency and extending the lifespan, to provide a composition and mixed powder that can be used in the organic electroluminescence element, and to provide an electronic device equipped with the organic electroluminescence element. [Means for solving the problem]

[0005] According to one aspect of the present invention, there is provided an organic electroluminescence element, comprising: An anode; A cathode; a light emitting region disposed between the anode and the cathode; a first anode-side organic layer disposed between the light-emitting region and the anode; the first anode-side organic layer contains a first material, the light-emitting region includes a first light-emitting layer and a second light-emitting layer; the first light-emitting layer is disposed between the first anode-side organic layer and the second light-emitting layer, the first light-emitting layer is in direct contact with the first anode-side organic layer, the first light-emitting layer contains a first host material and a second host material; the second light-emitting layer contains a third host material; an energy level of the highest occupied molecular orbital (HOMO)(HT1) of the first material, an energy level of the highest occupied molecular orbital (HOMO)(H1) of the first host material, and an energy level of the highest occupied molecular orbital (HOMO)(H2) of the second host material satisfy the relationship of the following mathematical formula (Math. A1), The triplet energy T of the first host material 1 (H1) and the triplet energy T 1 (H3) and satisfy the relationship of the following formula (Math A2), The triplet energy T of the second host material 1 (H2) and the triplet energy T 1 and (H3) satisfy the relationship of the following mathematical formula (Math. A3). HOMO(HT1)>HOMO(H2)>HOMO(H1) …(Math A1) T 1 (H1)>T 1 (H3) …(Number A2) T 1 (H2)>T 1 (H3) …(Number A3)

[0006] According to one aspect of the present invention, there is provided an organic electroluminescence element, comprising: An anode; A cathode; a light emitting region disposed between the anode and the cathode; the light emitting region comprises a first light emitting layer; the first light-emitting layer contains a first host material and a second host material; The first host material and the second host material are different from each other, The triplet energy T of the first host material 1 (H1) satisfies the relationship of the following formula (Math A4), The triplet energy T of the second host material 1 There is provided an organic electroluminescence element in which (H2) satisfies the relationship of the following mathematical formula (Math. A5). 1.8eV <T 1 (H1)<2.5eV …(Math A4) 1.8eV <T 1 (H2)<2.5eV …(Math A5)

[0007] According to one aspect of the invention, there is provided a composition comprising a first compound and a second compound, the composition comprising: the first compound and the second compound are different compounds, The first compound and the second compound each independently contain, in the molecule, at least one of a structure satisfying the following condition (i) and a structure satisfying the following condition (ii). Condition (i) The compound has a biphenyl structure in which a first benzene ring and a second benzene ring are linked by a single bond, and the first benzene ring and the second benzene ring in the biphenyl structure are further linked by a bridge in at least one portion other than the single bond. Condition (ii) The compound has a first connecting structure including a benzene ring and a naphthalene ring connected by a single bond, and the benzene ring and the naphthalene ring in the first connecting structure are each independently further fused with a single ring or a fused ring or are not fused with a fused ring, and the benzene ring and the naphthalene ring in the first connecting structure are further connected by a bridge in at least one portion other than the single bond.

[0008] According to one aspect of the present invention, there is provided a mixed powder containing a first compound and a second compound, the first compound and the second compound being different from each other, and the first compound and the second compound each independently contain at least one of the structures satisfying condition (i) and condition (ii) in the molecule.

[0009] According to one aspect of the invention, there is provided a composition comprising a first compound and a second compound, the composition comprising: the first compound and the second compound are different compounds, an energy level of the highest occupied molecular orbital (HOMO(C1)) of the first compound and an energy level of the highest occupied molecular orbital (HOMO(C2)) of the second compound satisfy the relationship of the following mathematical formula (Math. A7), The triplet energy T of the first compound 1 (C1) satisfies the relationship of the following formula (Math A8), The triplet energy T of the second compound 1 There is provided a composition, in which (C2) satisfies the relationship of the following mathematical formula (Math A9). HOMO(C2)>HOMO(C1) …(Math A7) 1.8eV <T 1 (C1)<2.5eV …(Number A8) 1.8eV <T 1(C2)<2.5eV …(Number A9)

[0010] According to one aspect of the present invention, there is provided a mixed powder containing a first compound and a second compound, the first compound and the second compound being different from each other, the highest occupied molecular orbital (HOMO(C1)) of the first compound and the highest occupied molecular orbital (HOMO(C2)) of the second compound satisfy the relationship of the mathematical formula (Math. A7), and the triplet energy T of the first compound is 1 (C1) satisfies the relationship of the above formula (Math. A8), and the triplet energy T 1 There is provided a mixed powder in which (C2) satisfies the relationship of the above mathematical formula (Math A9).

[0011] According to one aspect of the present invention, there is provided an organic electroluminescence element, comprising: An anode; A cathode; a light emitting region disposed between the anode and the cathode; the light emitting region comprises a first light emitting layer; There is provided an organic electroluminescence device, wherein the first light-emitting layer contains a composition according to one aspect of the present invention.

[0012] According to one aspect of the present invention, there is provided an electronic device equipped with the organic electroluminescence element according to one aspect of the present invention. Effect of the Invention

[0013] According to one aspect of the present invention, it is possible to provide an organic electroluminescence element capable of maintaining luminous efficiency and extending the lifespan, to provide a composition and a mixed powder that can be used in the organic electroluminescence element, and to provide an electronic device equipped with the organic electroluminescence element. [Brief description of the drawings]

[0014] [Figure 1]1 is a diagram showing a schematic configuration of an example of an organic electroluminescence element according to a first embodiment. [Diagram 2] FIG. 1 is a diagram showing a schematic configuration of an example of an organic electroluminescence element according to a second, third and fifth embodiments. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] [Definition] In this specification, hydrogen atoms include isotopes having different numbers of neutrons, namely protium, deuterium, and tritium.

[0016] In the present specification, in a chemical structural formula, a hydrogen atom, i.e., a protium atom, a deuterium atom, or a tritium atom is assumed to be bonded to a possible bonding position that is not explicitly indicated with a symbol such as "R" or "D" representing a deuterium atom.

[0017] In this specification, the number of ring carbon atoms represents the number of carbon atoms among the atoms constituting the ring itself of a compound having a structure in which atoms are bonded in a ring (for example, a monocyclic compound, a fused ring compound, a bridged compound, a carbocyclic compound, and a heterocyclic compound). When the ring is substituted with a substituent, the carbon contained in the substituent is not included in the number of ring carbon atoms. The "number of ring carbon atoms" described below is the same unless otherwise specified. For example, a benzene ring has 6 ring carbon atoms, a naphthalene ring has 10 ring carbon atoms, a pyridine ring has 5 ring carbon atoms, and a furan ring has 4 ring carbon atoms. For example, a 9,9-diphenylfluorenyl group has 13 ring carbon atoms, and a 9,9'-spirobifluorenyl group has 25 ring carbon atoms. In addition, when a benzene ring is substituted with, for example, an alkyl group as a substituent, the carbon number of the alkyl group is not included in the number of ring carbon atoms of the benzene ring. Therefore, the number of ring carbon atoms of the benzene ring substituted with an alkyl group is 6. In addition, when a naphthalene ring is substituted with, for example, an alkyl group as a substituent, the carbon number of the alkyl group is not included in the number of ring carbon atoms of the naphthalene ring. Therefore, the number of ring carbon atoms of the naphthalene ring substituted with an alkyl group is 10.

[0018] In this specification, the number of ring atoms refers to the number of atoms constituting the ring itself of a compound (e.g., a monocyclic compound, a fused ring compound, a bridged compound, a carbocyclic compound, and a heterocyclic compound) having a structure in which atoms are bonded in a ring (e.g., a monocyclic compound, a fused ring compound, and a ring assembly). The number of ring atoms does not include atoms that do not constitute a ring (e.g., a hydrogen atom that terminates the bond of an atom constituting a ring) or atoms contained in a substituent when the ring is substituted with a substituent. The "number of ring atoms" described below is the same unless otherwise specified. For example, the number of ring atoms of a pyridine ring is 6, the number of ring atoms of a quinazoline ring is 10, and the number of ring atoms of a furan ring is 5. For example, the number of hydrogen atoms or atoms constituting a substituent bonded to a pyridine ring is not included in the number of pyridine ring atoms. Therefore, the number of ring atoms of a pyridine ring to which a hydrogen atom or a substituent is bonded is 6. For example, hydrogen atoms bonded to carbon atoms of a quinazoline ring or atoms constituting a substituent are not included in the number of ring atoms of the quinazoline ring. Therefore, the number of ring atoms of a quinazoline ring to which a hydrogen atom or a substituent is bonded is 10.

[0019] In the present specification, the "number of carbon atoms XX to YY" in the expression "a substituted or unsubstituted ZZ group having carbon atoms XX to YY" represents the number of carbon atoms when the ZZ group is unsubstituted, and does not include the number of carbon atoms of the substituent when the ZZ group is substituted. Here, "YY" is larger than "XX", "XX" means an integer of 1 or more, and "YY" means an integer of 2 or more.

[0020] In the present specification, the "number of atoms XX to YY" in the expression "a substituted or unsubstituted ZZ group having the number of atoms XX to YY" represents the number of atoms when the ZZ group is unsubstituted, and does not include the number of atoms of the substituent when the ZZ group is substituted. Here, "YY" is larger than "XX", "XX" means an integer of 1 or more, and "YY" means an integer of 2 or more.

[0021] In this specification, the term "unsubstituted ZZ group" refers to the case where a "substituted or unsubstituted ZZ group" is an "unsubstituted ZZ group", and the term "substituted ZZ group" refers to the case where a "substituted or unsubstituted ZZ group" is a "substituted ZZ group". In the present specification, "unsubstituted" in the case of "a substituted or unsubstituted ZZ group" means that a hydrogen atom in the ZZ group is not replaced with a substituent. The hydrogen atom in the "unsubstituted ZZ group" is a protium atom, a deuterium atom, or a tritium atom. In the present specification, "substituted" in the case of "a substituted or unsubstituted ZZ group" means that one or more hydrogen atoms in the ZZ group are replaced with a substituent. Similarly, "substituted" in the case of "a BB group substituted with an AA group" means that one or more hydrogen atoms in the BB group are replaced with an AA group.

[0022] "Substituents Described Herein" The substituents described in this specification will be described below.

[0023] The "unsubstituted aryl group" described in this specification has 6 to 50 ring carbon atoms, preferably 6 to 30, and more preferably 6 to 18 ring carbon atoms, unless otherwise specified in this specification. The "unsubstituted heterocyclic group" described in this specification has 5 to 50 ring atoms, preferably 5 to 30, and more preferably 5 to 18 ring atoms, unless otherwise specified in this specification. The "unsubstituted alkyl group" described in this specification has 1 to 50 carbon atoms, preferably 1 to 20 carbon atoms, and more preferably 1 to 6 carbon atoms, unless otherwise specified in this specification. The "unsubstituted alkenyl group" described in this specification has 2 to 50 carbon atoms, preferably 2 to 20 carbon atoms, and more preferably 2 to 6 carbon atoms, unless otherwise specified in this specification. The "unsubstituted alkynyl group" described in this specification has 2 to 50 carbon atoms, preferably 2 to 20 carbon atoms, and more preferably 2 to 6 carbon atoms, unless otherwise specified in this specification. The "unsubstituted cycloalkyl group" described in this specification has 3 to 50 ring carbon atoms, preferably 3 to 20, and more preferably 3 to 6 ring carbon atoms, unless otherwise specified in this specification. The "unsubstituted arylene group" described in this specification has 6 to 50 ring carbon atoms, preferably 6 to 30, and more preferably 6 to 18 ring carbon atoms, unless otherwise specified in this specification. The "unsubstituted divalent heterocyclic group" described in this specification has 5 to 50 ring atoms, preferably 5 to 30, and more preferably 5 to 18 ring atoms, unless otherwise specified in this specification. The "unsubstituted alkylene group" described in this specification has 1 to 50 carbon atoms, preferably 1 to 20 carbon atoms, and more preferably 1 to 6 carbon atoms, unless otherwise specified in this specification.

[0024] "Substituted or unsubstituted aryl groups" Specific examples (specific example group G1) of the "substituted or unsubstituted aryl group" described in this specification include the following unsubstituted aryl group (specific example group G1A) and substituted aryl group (specific example group G1B). (Here, the unsubstituted aryl group refers to the case where the "substituted or unsubstituted aryl group" is an "unsubstituted aryl group", and the substituted aryl group refers to the case where the "substituted or unsubstituted aryl group" is a "substituted aryl group".) In this specification, when the term "aryl group" is simply used, it includes both an "unsubstituted aryl group" and a "substituted aryl group". The term "substituted aryl group" refers to a group in which one or more hydrogen atoms of an "unsubstituted aryl group" are replaced with a substituent. Examples of the "substituted aryl group" include the "unsubstituted aryl group" in the specific example group G1A below in which one or more hydrogen atoms are replaced with a substituent, and the substituted aryl group in the specific example group G1B below. The examples of the "unsubstituted aryl group" and the examples of the "substituted aryl group" listed here are merely examples, and the "substituted aryl group" described in this specification also includes the "substituted aryl group" in the specific example group G1B below in which a hydrogen atom bonded to a carbon atom of the aryl group itself is further replaced with a substituent, and the "substituted aryl group" in the specific example group G1B below in which a hydrogen atom of a substituent is further replaced with a substituent.

[0025] Unsubstituted aryl groups (specific example group G1A): Phenyl group, p-biphenyl group, m-biphenyl group, o-biphenyl group, p-terphenyl-4-yl group, p-terphenyl-3-yl group, p-terphenyl-2-yl group, m-terphenyl-4-yl group, m-terphenyl-3-yl group, m-terphenyl-2-yl group, o-terphenyl-4-yl group, o-terphenyl-3-yl group, o-terphenyl-2-yl group, 1-naphthyl group, 2-naphthyl group, anthryl group, Benzanthryl group, A phenanthryl group, Benzophenanthryl group, A phenalenyl group, Pyrenyl group, Chrysenyl group, benzochrysenyl group, A triphenylenyl group, Benzotriphenylenyl group, tetracenyl group, Pentacenyl group, fluorenyl group, 9,9'-spirobifluorenyl group, Benzofluorenyl group, Dibenzofluorenyl group, fluoranthenyl group, Benzofluoranthenyl group, Perylenyl groups, and A monovalent aryl group derived by removing one hydrogen atom from a ring structure represented by the following general formulas (TEMP-1) to (TEMP-15).

[0026] [ka]

[0027] [ka]

[0028] Substituted aryl groups (specific example group G1B): o-tolyl group, m-tolyl group, p-tolyl group, para-xylyl group, meta-xylyl group, ortho-xylyl group, para-isopropylphenyl group, meta-isopropylphenyl group, ortho-isopropylphenyl group, para-t-butylphenyl group, meta-t-butylphenyl group, ortho-t-butylphenyl group, 3,4,5-trimethylphenyl group, 9,9-dimethylfluorenyl group, 9,9-diphenylfluorenyl group, 9,9-bis(4-methylphenyl)fluorenyl group, 9,9-bis(4-isopropylphenyl)fluorenyl group, 9,9-bis(4-t-butylphenyl)fluorenyl group, Cyanophenyl group, triphenylsilylphenyl group, trimethylsilylphenyl group, phenylnaphthyl group, naphthylphenyl group, and A group in which one or more hydrogen atoms of a monovalent group derived from a ring structure represented by any one of the general formulae (TEMP-1) to (TEMP-15) are replaced with a substituent.

[0029] "Substituted or unsubstituted heterocyclic groups" The "heterocyclic group" described herein is a cyclic group containing at least one heteroatom as a ring-forming atom. Specific examples of the heteroatom include a nitrogen atom, an oxygen atom, a sulfur atom, a silicon atom, a phosphorus atom, and a boron atom. The "heterocyclic groups" described herein are either monocyclic or fused ring groups. The "heterocyclic group" described herein may be an aromatic heterocyclic group or a non-aromatic heterocyclic group. Specific examples (specific example group G2) of the "substituted or unsubstituted heterocyclic group" described in this specification include the following unsubstituted heterocyclic group (specific example group G2A) and substituted heterocyclic group (specific example group G2B). (Here, the unsubstituted heterocyclic group refers to the case where the "substituted or unsubstituted heterocyclic group" is an "unsubstituted heterocyclic group", and the substituted heterocyclic group refers to the case where the "substituted or unsubstituted heterocyclic group" is a "substituted heterocyclic group".) In this specification, when the term "heterocyclic group" is simply used, it includes both an "unsubstituted heterocyclic group" and a "substituted heterocyclic group". The term "substituted heterocyclic group" refers to a group in which one or more hydrogen atoms of an "unsubstituted heterocyclic group" are replaced with a substituent. Specific examples of the "substituted heterocyclic group" include the groups in which the hydrogen atoms of the "unsubstituted heterocyclic group" in the specific example group G2A below are replaced, and the examples of the substituted heterocyclic group in the specific example group G2B below are exemplified. The examples of the "unsubstituted heterocyclic group" and the examples of the "substituted heterocyclic group" listed here are merely examples, and the "substituted heterocyclic group" described in this specification also includes the groups in which the hydrogen atoms bonded to the ring-forming atoms of the heterocyclic group itself in the "substituted heterocyclic group" in the specific example group G2B are further replaced with a substituent, and the groups in which the hydrogen atoms of the substituents in the "substituted heterocyclic group" in the specific example group G2B are further replaced with a substituent.

[0030] The specific example group G2A includes, for example, the following unsubstituted heterocyclic groups containing a nitrogen atom (specific example group G2A1), unsubstituted heterocyclic groups containing an oxygen atom (specific example group G2A2), unsubstituted heterocyclic groups containing a sulfur atom (specific example group G2A3), and monovalent heterocyclic groups derived by removing one hydrogen atom from ring structures represented by the following general formulae (TEMP-16) to (TEMP-33) (specific example group G2A4).

[0031] Specific example group G2B includes, for example, the following nitrogen atom-containing substituted heterocyclic groups (specific example group G2B1), oxygen atom-containing substituted heterocyclic groups (specific example group G2B2), sulfur atom-containing substituted heterocyclic groups (specific example group G2B3), and monovalent heterocyclic groups derived from ring structures represented by the following general formulae (TEMP-16) to (TEMP-33), in which one or more hydrogen atoms are replaced with substituents (specific example group G2B4).

[0032] Unsubstituted heterocyclic groups containing a nitrogen atom (specific example group G2A1): Pyrrolyl group, imidazolyl group, A pyrazolyl group, A triazolyl group, Tetrazolyl group, oxazolyl group, an isoxazolyl group, oxadiazolyl group, A thiazolyl group, isothiazolyl group, A thiadiazolyl group, Pyridyl group, pyridazinyl group, pyrimidinyl group, A pyrazinyl group, Triazinyl group, Indolyl groups, isoindolyl group, Indolizinyl group, A quinolizinyl group, A quinolyl group, isoquinolyl group, Cinnolyl group, phthalazinyl group, A quinazolinyl group, A quinoxalinyl group, Benzimidazolyl group, Indazolyl group, A phenanthrolinyl group, A phenanthridinyl group, acridinyl group, A phenazinyl group, A carbazolyl group, Benzocarbazolyl group, morpholino group, phenoxazinyl group, A phenothiazinyl group, Azacarbazolyl and diazacarbazolyl groups.

[0033] Unsubstituted heterocyclic groups containing an oxygen atom (specific example group G2A2): Furyl group, oxazolyl group, an isoxazolyl group, oxadiazolyl group, xanthenyl group, benzofuranyl group, isobenzofuranyl group, Dibenzofuranyl group, naphthobenzofuranyl group, benzoxazolyl group, benzoisoxazolyl group, phenoxazinyl group, morpholino group, Dinaphthofuranyl group, azadibenzofuranyl group, diazadibenzofuranyl group, Azanaphthobenzofuranyl groups, and Diazanaphthobenzofuranyl group.

[0034] Unsubstituted heterocyclic groups containing a sulfur atom (specific example group G2A3): A thienyl group, A thiazolyl group, isothiazolyl group, A thiadiazolyl group, Benzothiophenyl group (benzothienyl group), Isobenzothiophenyl group (isobenzothienyl group), Dibenzothiophenyl group (dibenzothienyl group), Naphthobenzothiophenyl group (naphthobenzothienyl group), benzothiazolyl group, Benzisothiazolyl group, A phenothiazinyl group, Dinaphthothiophenyl group (dinaphthothienyl group), Azadibenzothiophenyl group (azadibenzothienyl group), Diazadibenzothiophenyl group (diazadibenzothienyl group), Azanapthobenzothiophenyl group (azanaphthobenzothienyl group), and Diazanaphthobenzothiophenyl group (diazanaphthobenzothienyl group).

[0035] Monovalent heterocyclic groups derived by removing one hydrogen atom from the ring structures represented by the following general formulae (TEMP-16) to (TEMP-33) (specific example group G2A4):

[0036] [ka]

[0037] [ka]

[0038] In the general formulae (TEMP-16) to (TEMP-33), X A and Y A each independently represents an oxygen atom, a sulfur atom, NH, or CH 2 However, X A and Y A At least one of is an oxygen atom, a sulfur atom, or NH. In the general formulae (TEMP-16) to (TEMP-33), X A and Y A At least one of the groups is NH or CH 2 In this case, the monovalent heterocyclic group derived from the ring structure represented by the general formulae (TEMP-16) to (TEMP-33) may have any of these NH, CH 2 This includes monovalent groups obtained by removing one hydrogen atom from the group.

[0039] Substituted heterocyclic groups containing a nitrogen atom (specific example group G2B1): A (9-phenyl)carbazolyl group, (9-biphenylyl)carbazolyl group, (9-phenyl)phenylcarbazolyl group, (9-naphthyl)carbazolyl group, diphenylcarbazol-9-yl group, phenylcarbazol-9-yl group, methylbenzimidazolyl group, Ethyl benzimidazolyl group, phenyltriazinyl group, Biphenylyltriazinyl group, diphenyltriazinyl group, phenylquinazolinyl group, and Biphenylylquinazolinyl group.

[0040] Substituted heterocyclic groups containing an oxygen atom (specific example group G2B2): phenyldibenzofuranyl group, methyldibenzofuranyl group, t-butyldibenzofuranyl group, and A monovalent residue of spiro[9H-xanthene-9,9'-[9H]fluorene].

[0041] Substituted heterocyclic groups containing sulfur atoms (specific example group G2B3): Phenyldibenzothiophenyl group, methyldibenzothiophenyl group, t-Butyldibenzothiophenyl group, and A monovalent residue of spiro[9H-thioxanthene-9,9'-[9H]fluorene].

[0042] Groups in which one or more hydrogen atoms of a monovalent heterocyclic group derived from a ring structure represented by the above general formulae (TEMP-16) to (TEMP-33) are replaced with a substituent (specific example group G2B4):

[0043] The above-mentioned "one or more hydrogen atoms of a monovalent heterocyclic group" refers to a hydrogen atom bonded to a ring-forming carbon atom of the monovalent heterocyclic group, X A and Y A A hydrogen atom bonded to a nitrogen atom when at least one of the above is NH, and X A and Y A One of them is CH 2 and methylene groups represented by the formula:

[0044] "Substituted or unsubstituted alkyl groups" Specific examples (specific example group G3) of the "substituted or unsubstituted alkyl group" described in this specification include the following unsubstituted alkyl group (specific example group G3A) and substituted alkyl group (specific example group G3B). (Here, the unsubstituted alkyl group refers to the case where the "substituted or unsubstituted alkyl group" is an "unsubstituted alkyl group", and the substituted alkyl group refers to the case where the "substituted or unsubstituted alkyl group" is a "substituted alkyl group".) Hereinafter, when the term "alkyl group" is simply mentioned, it includes both the "unsubstituted alkyl group" and the "substituted alkyl group". The term "substituted alkyl group" refers to a group in which one or more hydrogen atoms in the "unsubstituted alkyl group" are replaced with a substituent. Specific examples of the "substituted alkyl group" include the following "unsubstituted alkyl group" (specific example group G3A) in which one or more hydrogen atoms are replaced with a substituent, and examples of the substituted alkyl group (specific example group G3B). In this specification, the alkyl group in the "unsubstituted alkyl group" refers to a chain-like alkyl group. Therefore, the "unsubstituted alkyl group" includes a straight-chain "unsubstituted alkyl group" and a branched "unsubstituted alkyl group". Note that the examples of the "unsubstituted alkyl group" and the examples of the "substituted alkyl group" listed here are merely examples, and the "substituted alkyl group" described in this specification also includes a group in which a hydrogen atom of the alkyl group itself in the "substituted alkyl group" in the specific example group G3B is further replaced with a substituent, and a group in which a hydrogen atom of a substituent in the "substituted alkyl group" in the specific example group G3B is further replaced with a substituent.

[0045] Unsubstituted alkyl groups (specific example group G3A): Methyl group, Ethyl group, n-propyl group, isopropyl group, n-Butyl group, isobutyl group, s-Butyl group, and t-Butyl group.

[0046] Substituted alkyl groups (specific example group G3B): Heptafluoropropyl group (including isomers), pentafluoroethyl group, 2,2,2-trifluoroethyl group, and Trifluoromethyl group.

[0047] "Substituted or unsubstituted alkenyl group" Specific examples (specific example group G4) of the "substituted or unsubstituted alkenyl group" described in this specification include the following unsubstituted alkenyl group (specific example group G4A) and substituted alkenyl group (specific example group G4B). (Here, the unsubstituted alkenyl group refers to the case where the "substituted or unsubstituted alkenyl group" is an "unsubstituted alkenyl group", and the "substituted alkenyl group" refers to the case where the "substituted or unsubstituted alkenyl group" is a "substituted alkenyl group".) In this specification, the term "alkenyl group" simply includes both an "unsubstituted alkenyl group" and a "substituted alkenyl group". The term "substituted alkenyl group" refers to a group in which one or more hydrogen atoms in an "unsubstituted alkenyl group" are replaced with a substituent. Specific examples of the "substituted alkenyl group" include the following "unsubstituted alkenyl group" (specific example group G4A) having a substituent, and examples of substituted alkenyl groups (specific example group G4B). The examples of the "unsubstituted alkenyl group" and the examples of the "substituted alkenyl group" listed here are merely examples, and the "substituted alkenyl group" described in this specification also includes a group in which a hydrogen atom of the alkenyl group itself in the "substituted alkenyl group" in specific example group G4B is further replaced with a substituent, and a group in which a hydrogen atom of a substituent in the "substituted alkenyl group" in specific example group G4B is further replaced with a substituent.

[0048] Unsubstituted alkenyl groups (specific example group G4A): Vinyl group, Allyl groups, 1-butenyl group, 2-butenyl group, and 3-Butenyl group.

[0049] Substituted alkenyl groups (specific example group G4B): 1,3-butanedienyl group, 1-methylvinyl group, 1-methylallyl group, 1,1-dimethylallyl group, 2-methylallyl group, and 1,2-Dimethylallyl group.

[0050] "Substituted or unsubstituted alkynyl groups" Specific examples (specific example group G5) of the "substituted or unsubstituted alkynyl group" described in this specification include the following unsubstituted alkynyl groups (specific example group G5A). (Here, the unsubstituted alkynyl group refers to the case where the "substituted or unsubstituted alkynyl group" is an "unsubstituted alkynyl group".) Hereinafter, when simply referring to an "alkynyl group", it includes both an "unsubstituted alkynyl group" and a "substituted alkynyl group". The term "substituted alkynyl group" refers to an "unsubstituted alkynyl group" in which one or more hydrogen atoms have been replaced with a substituent. Specific examples of the "substituted alkynyl group" include the following "unsubstituted alkynyl groups" (specific example group G5A) in which one or more hydrogen atoms have been replaced with a substituent.

[0051] Unsubstituted alkynyl groups (specific example group G5A): Ethynyl group.

[0052] "Substituted or unsubstituted cycloalkyl groups" Specific examples (specific example group G6) of the "substituted or unsubstituted cycloalkyl group" described in this specification include the following unsubstituted cycloalkyl group (specific example group G6A) and substituted cycloalkyl group (specific example group G6B). (Here, the unsubstituted cycloalkyl group refers to the case where the "substituted or unsubstituted cycloalkyl group" is an "unsubstituted cycloalkyl group", and the substituted cycloalkyl group refers to the case where the "substituted or unsubstituted cycloalkyl group" is a "substituted cycloalkyl group".) In this specification, when the term "cycloalkyl group" is simply used, it includes both an "unsubstituted cycloalkyl group" and a "substituted cycloalkyl group". The term "substituted cycloalkyl group" refers to a group in which one or more hydrogen atoms in the "unsubstituted cycloalkyl group" are replaced with a substituent. Specific examples of the "substituted cycloalkyl group" include the following "unsubstituted cycloalkyl group" (specific example group G6A) in which one or more hydrogen atoms are replaced with a substituent, and the examples of the substituted cycloalkyl group (specific example group G6B). The examples of the "unsubstituted cycloalkyl group" and the examples of the "substituted cycloalkyl group" listed here are merely examples, and the "substituted cycloalkyl group" described in this specification also includes a group in the "substituted cycloalkyl group" in the specific example group G6B in which one or more hydrogen atoms bonded to a carbon atom of the cycloalkyl group itself are replaced with a substituent, and a group in the "substituted cycloalkyl group" in the specific example group G6B in which a hydrogen atom of a substituent is further replaced with a substituent.

[0053] Unsubstituted cycloalkyl groups (specific example group G6A): A cyclopropyl group, A cyclobutyl group, Cyclopentyl group, cyclohexyl group, 1-adamantyl group, 2-adamantyl group, 1-norbornyl group, and 2-Norbornyl group.

[0054] Substituted cycloalkyl groups (specific example group G6B): 4-Methylcyclohexyl group.

[0055] -Si(R 901 )(R 902 )(R 903 ) a group represented by As described herein, -Si(R 901 )(R 902 )(R 903 Specific examples (specific example group G7) of the group represented by -Si(G1)(G1)(G1), -Si(G1)(G2)(G2), -Si(G1)(G1)(G2), -Si(G2)(G2)(G2), -Si(G3)(G3)(G3), and -Si(G6)(G6)(G6) Here, G1 is a "substituted or unsubstituted aryl group" described in specific example group G1. G2 is a "substituted or unsubstituted heterocyclic group" described in specific example group G2. G3 is a "substituted or unsubstituted alkyl group" described in specific example group G3. G6 is a "substituted or unsubstituted cycloalkyl group" described in specific example group G6. The multiple G1s in -Si(G1)(G1)(G1) are the same as or different from each other. The multiple G2s in -Si(G1)(G2)(G2) are the same as or different from each other. The multiple G1s in -Si(G1)(G1)(G2) are the same as or different from each other. The multiple G2s in -Si(G2)(G2)(G2) are the same as or different from each other. The multiple G3s in -Si(G3)(G3)(G3) are the same as or different from each other. The multiple G6s in -Si(G6)(G6)(G6) are the same as or different from each other.

[0056] -O-(R 904 ) a group represented by As described herein, -O-(R 904 Specific examples (specific example group G8) of the group represented by -O(G1), -O(G2), -O(G3), and -O(G6) Examples include: Where: G1 is a "substituted or unsubstituted aryl group" described in specific example group G1. G2 is a "substituted or unsubstituted heterocyclic group" described in specific example group G2. G3 is a "substituted or unsubstituted alkyl group" described in specific example group G3. G6 is a "substituted or unsubstituted cycloalkyl group" described in specific example group G6.

[0057] -S-(R 905 ) a group represented by As described herein, -S-(R 905 Specific examples (specific example group G9) of the group represented by -S(G1), -S(G2), -S(G3), and -S(G6) Examples include: Where: G1 is a "substituted or unsubstituted aryl group" described in specific example group G1. G2 is a "substituted or unsubstituted heterocyclic group" described in specific example group G2. G3 is a "substituted or unsubstituted alkyl group" described in specific example group G3. G6 is a "substituted or unsubstituted cycloalkyl group" described in specific example group G6.

[0058] -N(R 906 )(R 907 ) a group represented by As described herein, -N(R 906 )(R 907 Specific examples (specific example group G10) of the group represented by -N(G1)(G1), -N(G2)(G2), -N(G1)(G2), -N(G3)(G3), and -N(G6)(G6) Examples include: Where: G1 is a "substituted or unsubstituted aryl group" described in specific example group G1. G2 is a "substituted or unsubstituted heterocyclic group" described in specific example group G2. G3 is a "substituted or unsubstituted alkyl group" described in specific example group G3. G6 is a "substituted or unsubstituted cycloalkyl group" described in specific example group G6. -The multiple G1's in N(G1)(G1) are the same or different from each other. -The multiple G2's in N(G2)(G2) are the same or different from each other. -The multiple G3's in N(G3)(G3) are the same or different from each other. The multiple G6s in -N(G6)(G6) are the same or different from each other.

[0059] "Halogen atoms" Specific examples of the "halogen atom" described in this specification (specific example group G11) include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

[0060] "Substituted or unsubstituted fluoroalkyl groups" The term "substituted or unsubstituted fluoroalkyl group" as used herein means a group in which at least one hydrogen atom bonded to a carbon atom constituting the alkyl group in the "substituted or unsubstituted alkyl group" is replaced with a fluorine atom, and also includes a group (perfluoro group) in which all hydrogen atoms bonded to carbon atoms constituting the alkyl group in the "substituted or unsubstituted alkyl group" are replaced with fluorine atoms. The number of carbon atoms in the "unsubstituted fluoroalkyl group" is 1 to 50, preferably 1 to 30, and more preferably 1 to 18, unless otherwise specified in the present specification. The term "substituted fluoroalkyl group" means a group in which one or more hydrogen atoms in the "fluoroalkyl group" are replaced with a substituent. The term "substituted fluoroalkyl group" as used herein also includes a group in which one or more hydrogen atoms bonded to a carbon atom in the alkyl chain in the "substituted fluoroalkyl group" are further replaced with a substituent, and a group in which one or more hydrogen atoms in the substituent in the "substituted fluoroalkyl group" are further replaced with a substituent. Specific examples of the "unsubstituted fluoroalkyl group" include the examples of the group in which one or more hydrogen atoms in the "alkyl group" (specific example group G3) are replaced with a fluorine atom.

[0061] "Substituted or unsubstituted haloalkyl groups" The term "substituted or unsubstituted haloalkyl group" as used herein means a group in which at least one hydrogen atom bonded to a carbon atom constituting the alkyl group in the "substituted or unsubstituted alkyl group" is replaced with a halogen atom, and also includes a group in which all hydrogen atoms bonded to carbon atoms constituting the alkyl group in the "substituted or unsubstituted alkyl group" are replaced with halogen atoms. The number of carbon atoms in the "unsubstituted haloalkyl group" is 1 to 50, preferably 1 to 30, and more preferably 1 to 18, unless otherwise specified in the present specification. The term "substituted haloalkyl group" means a group in which one or more hydrogen atoms in the "haloalkyl group" are replaced with a substituent. The term "substituted haloalkyl group" as used herein also includes a group in which one or more hydrogen atoms bonded to a carbon atom in the alkyl chain in the "substituted haloalkyl group" are further replaced with a substituent, and a group in which one or more hydrogen atoms in the substituent in the "substituted haloalkyl group" are further replaced with a substituent. Specific examples of the "unsubstituted haloalkyl group" include the examples of the group in which one or more hydrogen atoms in the "alkyl group" (specific example group G3) are replaced with a halogen atom. Haloalkyl groups are sometimes referred to as halogenated alkyl groups.

[0062] "Substituted or unsubstituted alkoxy groups" A specific example of the "substituted or unsubstituted alkoxy group" described in this specification is a group represented by -O(G3), where G3 is the "substituted or unsubstituted alkyl group" described in specific example group G3. The number of carbon atoms in the "unsubstituted alkoxy group" is 1 to 50, preferably 1 to 30, and more preferably 1 to 18, unless otherwise specified in this specification.

[0063] "Substituted or unsubstituted alkylthio groups" A specific example of the "substituted or unsubstituted alkylthio group" described in the present specification is a group represented by -S(G3), where G3 is the "substituted or unsubstituted alkyl group" described in the specific example group G3. The number of carbon atoms in the "unsubstituted alkylthio group" is 1 to 50, preferably 1 to 30, and more preferably 1 to 18, unless otherwise specified in the present specification.

[0064] "Substituted or unsubstituted aryloxy group" A specific example of the "substituted or unsubstituted aryloxy group" described in this specification is a group represented by -O(G1), where G1 is a "substituted or unsubstituted aryl group" described in specific example group G1. The number of ring carbon atoms 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.

[0065] "Substituted or unsubstituted arylthio group" A specific example of the "substituted or unsubstituted arylthio group" described in this specification is a group represented by -S(G1), where G1 is a "substituted or unsubstituted aryl group" described in specific example group G1. The number of ring carbon atoms 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.

[0066] "Substituted or unsubstituted trialkylsilyl group" A specific example of the "trialkylsilyl group" described in this specification is a group represented by -Si(G3)(G3)(G3), where G3 is a "substituted or unsubstituted alkyl group" described in the specific example group G3. The multiple G3s in -Si(G3)(G3)(G3) are the same or different from each other. The number of carbon atoms in each alkyl group of the "trialkylsilyl group" is 1 to 50, preferably 1 to 20, and more preferably 1 to 6, unless otherwise specified in this specification.

[0067] "Substituted or unsubstituted aralkyl group" A specific example of the "substituted or unsubstituted aralkyl group" described in the present specification is a group represented by -(G3)-(G1), where G3 is a "substituted or unsubstituted alkyl group" described in the specific example group G3, and G1 is a "substituted or unsubstituted aryl group" described in the specific example group G1. Thus, the "aralkyl group" is a group in which a hydrogen atom of an "alkyl group" is replaced with an "aryl group" as a substituent, and is one aspect of a "substituted alkyl group". The "unsubstituted aralkyl group" is an "unsubstituted alkyl group" substituted with an "unsubstituted aryl group", and the carbon number of the "unsubstituted aralkyl group" is 7 to 50, preferably 7 to 30, and more preferably 7 to 18, unless otherwise specified in the present specification. Specific examples of "substituted or unsubstituted aralkyl groups" include benzyl, 1-phenylethyl, 2-phenylethyl, 1-phenylisopropyl, 2-phenylisopropyl, phenyl-t-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.

[0068] Unless otherwise specified in the present specification, the substituted or unsubstituted aryl group described in the present specification is preferably a phenyl group, a p-biphenyl group, a m-biphenyl group, an o-biphenyl group, a p-terphenyl-4-yl group, a p-terphenyl-3-yl group, a p-terphenyl-2-yl group, a m-terphenyl-4-yl group, a m-terphenyl-3-yl group, a m-terphenyl-2-yl group, an o-terphenyl-4-yl group, an o-terphenyl-3-yl group, an o-terphenyl-2-yl group, a 1-naphthyl group, a 2-naphthyl group, an anthryl group, a phenanthryl group, a pyrenyl group, a chrysenyl group, a triphenylenyl group, a fluorenyl group, a 9,9'-spirobifluorenyl group, a 9,9-dimethylfluorenyl group, a 9,9-diphenylfluorenyl group, and the like.

[0069] The substituted or unsubstituted heterocyclic group described in the present specification, unless otherwise specified in the present specification, is preferably a pyridyl group, a pyrimidinyl group, a triazinyl group, a quinolyl group, an isoquinolyl group, a quinazolinyl group, a benzimidazolyl group, a phenanthrolinyl group, a carbazolyl group (a 1-carbazolyl group, a 2-carbazolyl group, a 3-carbazolyl group, a 4-carbazolyl group, or a 9-carbazolyl group), a benzocarbazolyl group, an azacarbazolyl group, a diazacarbazolyl group, a dibenzofuranyl group, a naphthobenzofuranyl group, an azadibenzofuranyl group, a diazadibenzofuranyl group, a dibenzothiophenyl group, a naphthobenzothiophenyl group, an aza Examples of such groups include a dibenzothiophenyl group, a diazadibenzothiophenyl group, a (9-phenyl)carbazolyl group (a (9-phenyl)carbazol-1-yl group, a (9-phenyl)carbazol-2-yl group, a (9-phenyl)carbazol-3-yl group, or a (9-phenyl)carbazol-4-yl group), a (9-biphenylyl)carbazolyl group, a (9-phenyl)phenylcarbazolyl group, a diphenylcarbazol-9-yl group, a phenylcarbazol-9-yl group, a phenyltriazinyl group, a biphenylyltriazinyl group, a diphenyltriazinyl group, a phenyldibenzofuranyl group, and a phenyldibenzothiophenyl group.

[0070] In this specification, a carbazolyl group is specifically any of the following groups, unless otherwise specified in the specification.

[0071] [ka]

[0072] In this specification, the (9-phenyl)carbazolyl group is specifically any of the following groups, unless otherwise specified in the specification.

[0073] [ka]

[0074] In the general formulae (TEMP-Cz1) to (TEMP-Cz9), * represents a bonding position.

[0075] In this specification, a dibenzofuranyl group and a dibenzothiophenyl group are specifically any of the following groups, unless otherwise specified in this specification.

[0076] [ka]

[0077] In the above general formulae (TEMP-34) to (TEMP-41), * represents a bonding position.

[0078] The substituted or unsubstituted alkyl groups described herein are preferably methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, t-butyl, and the like, unless otherwise specified herein.

[0079] "Substituted or unsubstituted arylene group" Unless otherwise specified, the "substituted or unsubstituted arylene group" described in this specification is a divalent group derived by removing one hydrogen atom on the aryl ring from the above-mentioned "substituted or unsubstituted aryl group". Specific examples of the "substituted or unsubstituted arylene group" (specific example group G12) include divalent groups derived by removing one hydrogen atom on the aryl ring from the "substituted or unsubstituted aryl group" described in specific example group G1.

[0080] "Substituted or unsubstituted divalent heterocyclic group" Unless otherwise specified, the "substituted or unsubstituted divalent heterocyclic group" described in this specification is a divalent group derived by removing one hydrogen atom on the heterocycle from the above-mentioned "substituted or unsubstituted heterocyclic group". Specific examples of the "substituted or unsubstituted divalent heterocyclic group" (specific example group G13) include divalent groups derived by removing one hydrogen atom on the heterocycle from the "substituted or unsubstituted heterocyclic group" described in specific example group G2.

[0081] "Substituted or unsubstituted alkylene group" Unless otherwise specified, the "substituted or unsubstituted alkylene group" described in this specification is a divalent group derived by removing one hydrogen atom on the alkyl chain from the above-mentioned "substituted or unsubstituted alkyl group". Specific examples of the "substituted or unsubstituted alkylene group" (specific example group G14) include divalent groups derived by removing one hydrogen atom on the alkyl chain from the "substituted or unsubstituted alkyl group" described in specific example group G3.

[0082] The substituted or unsubstituted arylene group described in this specification is preferably any of the groups represented by the following general formulae (TEMP-42) to (TEMP-68), unless otherwise specified in this specification.

[0083] [ka]

[0084] [ka]

[0085] In the general formulae (TEMP-42) to (TEMP-52), Q 1 ~Q 10 are each independently a hydrogen atom or a substituent. In the above general formulae (TEMP-42) to (TEMP-52), * represents a bonding position.

[0086] [ka]

[0087] In the general formulae (TEMP-53) to (TEMP-62), Q 1 ~Q 10 are each independently a hydrogen atom or a substituent. formula Q 9 and Q 10may be bonded to each other via a single bond to form a ring. In the above general formulae (TEMP-53) to (TEMP-62), * represents a bonding position.

[0088] [ka]

[0089] In the general formulae (TEMP-63) to (TEMP-68), Q 1 ~Q 8 are each independently a hydrogen atom or a substituent. In the above general formulae (TEMP-63) to (TEMP-68), * represents a bonding position.

[0090] The substituted or unsubstituted divalent heterocyclic group described in this specification is preferably any of the groups represented by the following general formulae (TEMP-69) to (TEMP-102), unless otherwise specified in this specification.

[0091] [ka]

[0092] [ka]

[0093] [ka]

[0094] In the general formulae (TEMP-69) to (TEMP-82), Q 1 ~Q 9 are each independently a hydrogen atom or a substituent.

[0095] [ka]

[0096] [ka]

[0097] [ka]

[0098] [ka]

[0099] In the general formulae (TEMP-83) to (TEMP-102), Q 1 ~Q 8 are each independently a hydrogen atom or a substituent.

[0100] The above is an explanation of "the substituents described in this specification".

[0101] - "When bonded to form a ring" In this specification, the phrase "one or more of a set consisting of two or more adjacent groups bond to each other to form a substituted or unsubstituted monocycle, bond to each other to form a substituted or unsubstituted fused ring, or are not bonded to each other" means the case where "one or more of a set consisting of two or more adjacent groups bond to each other to form a substituted or unsubstituted monocycle", the case where "one or more of a set consisting of two or more adjacent groups bond to each other to form a substituted or unsubstituted fused ring", and the case where "one or more of a set consisting of two or more adjacent groups are not bonded to each other". In this specification, the cases where "one or more of a set of two or more adjacent rings are bonded to each other to form a substituted or unsubstituted monocyclic ring" and "one or more of a set of two or more adjacent rings are bonded to each other to form a substituted or unsubstituted condensed ring" (hereinafter, these cases may be collectively referred to as "a case where they are bonded to form a ring") will be explained below. The case of an anthracene compound represented by the following general formula (TEMP-103), in which the mother skeleton is an anthracene ring, will be explained as an example.

[0102] [ka]

[0103] For example, R 921 ~R 930 In the case where "one or more pairs of adjacent two or more groups are bonded to each other to form a ring," one pair of adjacent two groups is R 921 and R 922 With R 922 and R 923 With R 923 and R 924 With R 924 and R 930 With R 930 and R 925 With R 925 and R 926 With R 926 and R 927 With R 927 and R 928 With R 928 and R 929 and R 929 and R 921 It is paired with .

[0104] The above "one or more pairs" means that two or more pairs of adjacent two or more groups may simultaneously form a ring. For example, R 921 and R 922 and are bonded to ring Q A At the same time, R 925 and R 926 and are bonded to ring Q B When the above general formula (TEMP-103) is formed, the anthracene compound represented by the general formula (TEMP-104) is represented by the following general formula (TEMP-104).

[0105] [ka]

[0106] The case where a "set of two or more adjacent units" forms a ring includes not only the case where a set of two adjacent units is bonded as in the previous example, but also the case where a set of three or more adjacent units is bonded. For example, R 921 and R 922 and are bonded to ring Q A and R 922 and R 923 and are bonded to ring Q C The three adjacent (R 921 , R 922 and R 923 In this case, the anthracene compound represented by the general formula (TEMP-103) is represented by the following general formula (TEMP-105). In the following general formula (TEMP-105), the ring Q A and Ring Q C is R 922 Share.

[0107] [ka]

[0108] The "monocyclic ring" or "condensed ring" formed may be a saturated or unsaturated ring as the structure of only the ring formed. Even when "one of the pairs of adjacent two" forms a "monocyclic ring" or a "condensed ring", the "monocyclic ring" or the "condensed ring" may form a saturated or unsaturated ring. For example, the ring Q formed in the general formula (TEMP-104) may be a saturated or unsaturated ring. A and Ring Q B are "monocyclic" or "condensed rings". In addition, the ring Q formed in the general formula (TEMP-105) A , and ring Q C is a "fused ring". The ring Q in the above general formula (TEMP-105) A and Kan Q C That is, Ring Q A and Kan Q C The ring Q in the general formula (TMEP-104) is condensed to form a condensed ring. AIf is a benzene ring, then ring Q A The ring Q in the general formula (TMEP-104) is a monocyclic ring. A If is a naphthalene ring, then ring Q A is a fused ring.

[0109] The term "unsaturated ring" refers to an aromatic hydrocarbon ring or an aromatic heterocyclic ring. The term "saturated ring" refers to an aliphatic hydrocarbon ring or a non-aromatic heterocyclic ring. Specific examples of the aromatic hydrocarbon ring include structures in which the groups given as specific examples in the specific example group G1 are terminated with a hydrogen atom. Specific examples of the aromatic heterocycle include structures in which the aromatic heterocyclic groups exemplified as specific examples in the specific example group G2 are terminated with a hydrogen atom. Specific examples of the aliphatic hydrocarbon ring include structures in which the groups given as specific examples in the specific example group G6 are terminated with a hydrogen atom. The term "form a ring" means that a ring is formed only with a plurality of atoms of the parent skeleton, or with a plurality of atoms of the parent skeleton and one or more optional elements. For example, R 921 and R 922 and are bonded together to form a ring Q A is R 921 The carbon atom of the anthracene skeleton to which R is bonded 922 It means a ring formed by the carbon atom of the anthracene skeleton to which R is bonded and one or more arbitrary elements. 921 and R 922 Todekan Q A In the case where R 921 The carbon atom of the anthracene skeleton to which R is bonded 922 When the carbon atom of the anthracene skeleton to which R is bonded forms a monocyclic unsaturated ring with four carbon atoms, R 921 and R 922 The ring formed by this is a benzene ring.

[0110] Here, unless otherwise specified in the present specification, the "arbitrary element" is preferably at least one element selected from the group consisting of carbon, nitrogen, oxygen, and sulfur. In the arbitrary element (for example, in the case of a carbon element or a nitrogen element), a bond that does not form a ring may be terminated with a hydrogen atom or the like, or may be substituted with an "arbitrary substituent" described below. When an arbitrary element other than a carbon element is included, the ring formed is a heterocycle. Unless otherwise specified in this specification, the "one or more arbitrary elements" constituting a single ring or a condensed ring is preferably 2 or more and 15 or less, more preferably 3 or more and 12 or less, and even more preferably 3 or more and 5 or less. Unless otherwise specified in this specification, of the "monocyclic ring" and the "condensed ring", the "monocyclic ring" is preferred. Unless otherwise specified in this specification, of the "saturated ring" and the "unsaturated ring", the "unsaturated ring" is preferred. Unless otherwise specified in this specification, a "monocyclic ring" is preferably a benzene ring. Unless otherwise specified in this specification, the "unsaturated ring" is preferably a benzene ring. When "one or more of a set of two or more adjacent rings" "combine with each other to form a substituted or unsubstituted monocyclic ring" or "combine with each other to form a substituted or unsubstituted fused ring", unless otherwise specified in this specification, preferably, one or more of a set of two or more adjacent rings combine with each other to form a substituted or unsubstituted "unsaturated ring" consisting of a plurality of atoms of the parent skeleton and at least one element selected from the group consisting of 1 to 15 carbon elements, nitrogen elements, oxygen elements, and sulfur elements.

[0111] When the above-mentioned "monocyclic ring" or "condensed ring" has a substituent, the substituent is, for example, the "optional substituent" described later. When the above-mentioned "monocyclic ring" or "condensed ring" has a substituent, specific examples of the substituent are the substituents described in the above-mentioned section "Substituents described in this specification". When the above-mentioned "saturated ring" or "unsaturated ring" has a substituent, the substituent is, for example, the "optional substituent" described below. When the above-mentioned "monocyclic ring" or "condensed ring" has a substituent, specific examples of the substituent are the substituents described in the above section "Substituents described in this specification". The above is an explanation of the case where "one or more pairs of adjacent groups bond with each other to form a substituted or unsubstituted monocyclic ring" and the case where "one or more pairs of adjacent groups bond with each other to form a substituted or unsubstituted fused ring" ("combined to form a ring").

[0112] Substituents in the phrase "substituted or unsubstituted" In one embodiment of the present specification, the substituent in the case of "substituted or unsubstituted" (sometimes referred to as "optional substituent" in the present specification) is, for example, an unsubstituted alkyl group having 1 to 50 carbon atoms; an unsubstituted alkenyl group having 2 to 50 carbon atoms, an unsubstituted alkynyl group having 2 to 50 carbon atoms, an unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms; -Si(R 901 )(R 902 )(R 903 ), -O-(R 904 ), -S-(R 905 ), -N(R 906 )(R 907 ), Halogen atoms, cyano groups, nitro groups, an unsubstituted aryl group having 6 to 50 ring carbon atoms, and Unsubstituted heterocyclic group having 5 to 50 ring atoms and the like, Here, R 901 ~R 907 are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. R 901 If there are two or more, there are two or more R 901 are identical or different from each other, R 902 If there are two or more, there are two or more R 902 are identical or different from each other, R 903 If there are two or more, there are two or more R 903 are identical or different from each other, R 904 If there are two or more, there are two or more R 904 are identical or different from each other, R 905 If there are two or more, there are two or more R 905 are identical or different from each other, R 906 If there are two or more, there are two or more R 906 are identical or different from each other, R 907 If there are two or more, there are two or more R 907 are the same or different from each other.

[0113] In one embodiment, the substituent in the above "substituted or unsubstituted" is: an alkyl group having 1 to 50 carbon atoms; an aryl group having 6 to 50 ring carbon atoms, and Heterocyclic groups with 5 to 50 ring atoms is a group selected from the group consisting of:

[0114] In one embodiment, the substituent in the above "substituted or unsubstituted" is: an alkyl group having 1 to 18 carbon atoms; An aryl group having 6 to 18 ring carbon atoms, and Heterocyclic groups with 5 to 18 ring atoms is a group selected from the group consisting of:

[0115] Specific examples of each group of the above optional substituents are the specific examples of the substituents described above in the section "Substituents described in this specification."

[0116] Unless otherwise specified in this specification, any adjacent substituents may be combined with each other to form a "saturated ring" or an "unsaturated ring", preferably a substituted or unsubstituted saturated 5-membered ring, a substituted or unsubstituted saturated 6-membered ring, a substituted or unsubstituted unsaturated 5-membered ring, or a substituted or unsubstituted unsaturated 6-membered ring, more preferably a benzene ring. Unless otherwise specified in the present specification, the optional substituent may further have a substituent. The substituent that the optional substituent further has is the same as the optional substituent described above.

[0117] In this specification, a numerical range expressed using "AA to BB" means a range including the number AA written before "AA to BB" as the lower limit and the number BB written after "AA to BB" as the upper limit.

[0118] In this specification, a mathematical expression expressed as "A≧B" means that the value of A is equal to the value of B, or the value of A is greater than the value of B. In this specification, a mathematical expression expressed as "A≦B" means that the value of A is equal to the value of B, or the value of A is smaller than the value of B.

[0119] First Embodiment (Organic electroluminescence element) The organic electroluminescence element of the present embodiment includes an anode, a cathode, a light-emitting region disposed between the anode and the cathode, and a first anode-side organic layer disposed between the light-emitting region and the anode, the first anode-side organic layer containing a first material, the light-emitting region including a first light-emitting layer and a second light-emitting layer, the first light-emitting layer being disposed between the first anode-side organic layer and the second light-emitting layer, and the first light-emitting layer being in contact with the first anode-side organic layer. the first emitting layer contains a first host material and a second host material, the second emitting layer contains a third host material, a highest occupied molecular orbital (HOMO)(HT1) of the first material, a highest occupied molecular orbital (HOMO)(H1) of the first host material, and a highest occupied molecular orbital (HOMO)(H2) of the second host material satisfy the relationship of the following mathematical formula (Math A1), and a triplet energy T 1 (H1) and the triplet energy T 1 (H3) satisfies the relationship of the following mathematical formula (Math A2), and the triplet energy T 1 (H2) and the triplet energy T 1 (H3) satisfies the relationship of the following formula (A3). HOMO(HT1)>HOMO(H2)>HOMO(H1) …(Math A1) T 1 (H1)>T 1 (H3) …(Number A2) T 1 (H2)>T 1 (H3) …(Number A3)

[0120] According to this embodiment, it is possible to provide an organic electroluminescence element capable of maintaining luminous efficiency and extending the life span.

[0121] In the organic electroluminescence device according to this embodiment, the first light-emitting layer contains two types of host materials, a compound having a high energy level HOMO of the highest occupied molecular orbital and a compound having a low energy level HOMO of the highest occupied molecular orbital, and satisfies the relationship of the mathematical formula (Mathematical Formula A1). According to the organic EL device of this embodiment, the hole injection property to the first light-emitting layer is improved compared to an organic EL device having an emitting layer containing one type of host material, so that the luminous efficiency of the organic EL device is maintained and the life span is extended.

[0122] In the organic electroluminescence element according to this embodiment, the light-emitting region includes the first light-emitting layer and the second light-emitting layer, and thus the light-emitting efficiency is improved. Conventionally, Triplet-Tripret-Annhilation (sometimes referred to as TTA) has been known as a technique for improving the luminous efficiency of an organic electroluminescence element. TTA is a mechanism in which triplet excitons collide with each other to generate singlet excitons. The TTA mechanism is sometimes referred to as the TTF mechanism as described in Patent Document 2.

[0123] The TTF phenomenon will be explained. Holes injected from the anode and electrons injected from the cathode recombine in the light-emitting layer to generate excitons. As has been known in the past, the spin state is 25% singlet excitons and 75% triplet excitons. In conventionally known fluorescent elements, 25% of the singlet excitons emit light when they relax to the ground state, but the remaining 75% of the triplet excitons return to the ground state through a thermal deactivation process without emitting light. Therefore, the theoretical limit of the internal quantum efficiency of conventional fluorescent elements was said to be 25%. On the other hand, the behavior of triplet excitons generated inside organic materials has been theoretically investigated. According to S.M. Bachilo et al. (J.Phys.Chem.A,104,7711(2000)), if it is assumed that higher-order excitons such as quintets immediately return to triplet states, triplet excitons (hereafter, 3 A *When the density of triplet excitons (hereinafter referred to as triplet excitons) increases, the triplet excitons collide with each other and the reaction shown in the following formula occurs. Here, 1 A represents the ground state, 1 A * represents the lowest excited singlet exciton. 3 A * + 3 A * →(4 / 9) 1 A+(1 / 9) 1 A * +(13 / 9) 3 A * That is, 5 3 A * →4 1 A+1A * It is predicted that 1 / 5, or 20%, of the 75% of triplet excitons initially generated will change to singlet excitons. Therefore, the singlet excitons that contribute as light will be 40%, which is the 25% initially generated plus 75% × (1 / 5) = 15%. In this case, the emission ratio of TTF-derived light in the total emission intensity (TTF ratio) will be 15 / 40, or 37.5%. In addition, if it is assumed that the 75% of the triplet excitons initially generated collide with each other to generate singlet excitons (one singlet exciton is generated from two triplet excitons), a very high internal quantum efficiency of 62.5% will be obtained by adding 75% × (1 / 2) = 37.5% to the 25% of the initially generated singlet excitons. In this case, the TTF ratio is 37.5 / 62.5 = 60%.

[0124] According to the organic electroluminescence element of this embodiment, triplet excitons generated by recombination of holes and electrons in the first light-emitting layer are considered to be difficult to quench even if there are excess carriers at the interface between the first light-emitting layer and the organic layer that is in direct contact with the first light-emitting layer. For example, when the recombination region is 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 is considered. On the other hand, when the recombination region is 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 is considered. The organic electroluminescence device according to this embodiment includes at least two emitting layers (i.e., a first emitting layer and a second emitting layer) that satisfy a predetermined relationship. The triplet energy T 1 (H1) and the triplet energy T of the third host material in the second emitting layer 1 (H3) satisfies the relationship of the above mathematical formula (Math A2), and the triplet energy T 1 (H2) and the triplet energy T of the third host material in the second emitting layer 1 (H3) satisfy the relationship of the above formula (Math A3). By providing the first light-emitting layer and the second light-emitting layer so as to satisfy the relationship of the above formula (Mathematical Formula A2) and formula (Mathematical Formula A3), triplet excitons generated in the first light-emitting layer can be transferred to the second light-emitting layer without being quenched by excess carriers, and reverse transfer from the second light-emitting layer to the first light-emitting layer can be suppressed. As a result, the TTF mechanism is expressed in the second light-emitting layer, singlet excitons are efficiently generated, and the luminous efficiency is improved. In this manner, the organic electroluminescence element has a first light-emitting layer that mainly generates triplet excitons, and a second light-emitting layer that mainly exerts the TTF mechanism by utilizing triplet excitons transferred from the first light-emitting layer, as different regions, and uses a compound having a triplet energy smaller than those of the first host material and the second host material in the first light-emitting layer as the third host material in the second light-emitting layer, thereby providing a difference in triplet energy, thereby improving the luminous efficiency.

[0125] In one aspect of the organic EL device of this embodiment, the triplet energy T 1 (H1) satisfies the relationship of the following mathematical formula (Math. A4), and the triplet energy T 1 (H2) satisfies the relationship of the following equation (Math A5). 1.8eV <T 1 (H1)<2.5eV …(Math A4) 1.8eV <T 1 (H2)<2.5eV …(Math A5)

[0126] In one aspect of the organic EL device of this embodiment, the triplet energy T 1 (H1) satisfies the relationship of the following mathematical formula (Math. A41), and the triplet energy T 1 (H2) satisfies the relationship of the following equation (Math A51). 2.0eV <T 1 (H1)<2.3eV …(Math A41) 2.0eV <T 1 (H2)<2.3eV …(Number A51)

[0127] In one aspect of the organic EL device of this embodiment, the triplet energy T 1 The triplet energy T of (H1) and the third host material 1 (H3) satisfy the relationship of the following formula (Math. A21). T 1 (H1)-T 1 (H3)>0.03eV …(Math A21)

[0128] In one aspect of the organic EL device of this embodiment, the triplet energy T 1 The triplet energy T of (H2) and the third host material 1 (H3) satisfy the relationship of the following formula (Math. A31). T 1 (H2)-T 1 (H3)>0.03eV …(Number A31)

[0129] In one aspect of the organic EL element of the present embodiment, the HOMO (H2) satisfies the relationship of the following mathematical formula (Math A10). HOMO(H2)>-5.7eV …(Math A10)

[0130] In one aspect of the organic EL element of the present embodiment, the HOMO (H2) satisfies the relationship of the following mathematical formula (Math. A101). HOMO(H2)≧-5.6eV …(Number A101)

[0131] In one aspect of the organic EL element of the present embodiment, the HOMO (H2) satisfies the relationship of the following mathematical formula (Math. A102). HOMO(H2)≧-5.5eV …(Number A102)

[0132] In one aspect of the organic EL element of the present embodiment, the HOMO (H1) satisfies the relationship of the following mathematical formula (Math. A11). -5.6eV>HOMO(H1) …(Math A11)

[0133] In one aspect of the organic EL element of the present embodiment, the HOMO (H1) satisfies the relationship of the following mathematical formula (Math. A111). -5.7eV≧HOMO(H1) …(Number A111)

[0134] In one aspect of the organic EL element of the present embodiment, the HOMO (H1) satisfies the relationship of the above-mentioned mathematical formula (Math. A111), and the HOMO (H2) satisfies the relationship of the above-mentioned mathematical formula (Math. A10).

[0135] In one aspect of the organic EL element of this embodiment, the HOMO (H1) satisfies the relationship of the above-mentioned mathematical formula (Math. A111), and the HOMO (H2) satisfies the relationship of the above-mentioned mathematical formula (Math. A101).

[0136] In one aspect of the organic EL element of this embodiment, the HOMO (H1) satisfies the relationship of the above-mentioned mathematical formula (Math. A111), and the HOMO (H2) satisfies the relationship of the above-mentioned mathematical formula (Math. A102).

[0137] (Light emitting area) The organic EL device of the present embodiment has a light-emitting region including a first light-emitting layer and a second light-emitting layer. The light-emitting region of the present embodiment may include only the first light-emitting layer and the second light-emitting layer, or may include an organic layer different from the first light-emitting layer and the second light-emitting layer.

[0138] In the organic EL device of the present embodiment, the first emitting layer contains a first host material and a second host material, and the second emitting layer contains a third host material, and in the organic EL device of the present embodiment, the first material, the first host material, the second host material, and the third host material are different compounds from each other.

[0139] In one aspect of the organic EL device of the present embodiment, the first light-emitting layer contains a first light-emitting compound, and the second light-emitting layer contains a second light-emitting compound. In one aspect of the organic EL device of the present embodiment, the first light-emitting compound and the second light-emitting compound are the same or different from each other.

[0140] In one aspect of the organic EL device of the present embodiment, the first light-emitting compound and the second light-emitting compound are each independently a compound that emits light having a maximum peak wavelength of 500 nm or less.

[0141] (First Hole Transporting Zone) In one aspect of the organic EL device of this embodiment, a first hole transport zone made of a plurality of organic layers is disposed between the anode and the first light-emitting region. In one aspect of the organic EL element of the present embodiment, the first hole-transporting region includes at least the first anode-side organic layer. In one aspect of the organic EL element of the present embodiment, the first hole-transporting region includes the first anode-side organic layer, the second anode-side organic layer, and the third anode-side organic layer. In one aspect of the organic EL element of the present embodiment, the third anode-side organic layer, the second anode-side organic layer, and the first anode-side organic layer are disposed in this order from the anode side.

[0142] (First anode-side organic layer) In the organic EL device of the present embodiment, the first anode-side organic layer is disposed between the light-emitting region and the anode. The first anode-side organic layer contains a first material.

[0143] The configuration of the organic EL element of this embodiment will be described in more detail in the section "Common Configuration of Each Embodiment" below.

[0144] Second Embodiment (Organic electroluminescence element) The organic electroluminescence device of the present embodiment has an anode, a cathode, and a light-emitting region disposed between the anode and the cathode. The light-emitting region includes a first light-emitting layer. The first light-emitting layer contains a first host material and a second host material, the first host material and the second host material are different from each other, and the triplet energy T 1 (H1) satisfies the relationship of the following mathematical formula (Math. A4), and the triplet energy T 1 (H2) satisfies the relationship of the following equation (Math A5). 1.8eV <T 1 (H1)<2.5eV …(Math A4) 1.8eV <T 1 (H2)<2.5eV …(Math A5)

[0145] According to the present embodiment, an organic electroluminescence element capable of maintaining luminous efficiency and extending the life span can be provided. According to the organic EL element of the present embodiment, the first emitting layer contains two types of host materials that satisfy the relationship of the mathematical formulas (Mathematical Formula A4) and (Mathematical Formula A5), and therefore, compared with an organic EL element having an emitting layer containing one type of host material, hole injection into the first emitting layer is improved, and thus the luminous efficiency of the organic EL element is maintained and the life span is extended.

[0146] In one aspect of the organic EL device of this embodiment, the triplet energy T 1 (H1) satisfies the relationship of the following mathematical formula (Math. A41), and the triplet energy T 1 (H2) satisfies the relationship of the following equation (Math A51). 2.0eV <T 1 (H1)<2.3eV …(Math A41) 2.0eV <T 1 (H2)<2.3eV …(Number A51)

[0147] In one aspect of the organic EL element of the present embodiment, the HOMO (H2) satisfies the relationship of the following mathematical formula (Math A10). HOMO(H2)>-5.7eV …(Math A10)

[0148] In one aspect of the organic EL element of the present embodiment, the HOMO (H2) satisfies the relationship of the following mathematical formula (Math. A101). HOMO(H2)≧-5.6eV …(Number A101)

[0149] In one aspect of the organic EL element of the present embodiment, the HOMO (H2) satisfies the relationship of the following mathematical formula (Math. A102). HOMO(H2)≧-5.5eV …(Number A102)

[0150] In one aspect of the organic EL element of the present embodiment, the HOMO (H1) satisfies the relationship of the following mathematical formula (Math. A11). -5.6eV>HOMO(H1) …(Math A11)

[0151] In one aspect of the organic EL element of the present embodiment, the HOMO (H1) satisfies the relationship of the following mathematical formula (Math. A111). -5.7eV≧HOMO(H1) …(Number A111)

[0152] In one aspect of the organic EL element of this embodiment, the HOMO (H1) satisfies the relationship of the above-mentioned mathematical formula (Math. A111), and the HOMO (H2) satisfies the relationship of the above-mentioned mathematical formula (Math. A10).

[0153] In one aspect of the organic EL element of this embodiment, the HOMO (H1) satisfies the relationship of the above-mentioned mathematical formula (Math. A111), and the HOMO (H2) satisfies the relationship of the above-mentioned mathematical formula (Math. A101).

[0154] In one aspect of the organic EL element of this embodiment, the HOMO (H1) satisfies the relationship of the above-mentioned mathematical formula (Math. A111), and the HOMO (H2) satisfies the relationship of the above-mentioned mathematical formula (Math. A102).

[0155] (Light emitting area) The organic EL device of the present embodiment has a light-emitting region including a first light-emitting layer. The light-emitting region of the present embodiment may include only the first light-emitting layer, or may include an organic layer different from the first light-emitting layer.

[0156] In the organic EL device of the present embodiment, the first emitting layer contains a first host material and a second host material. In the organic EL device of the present embodiment, the first host material and the second host material are different compounds.

[0157] In one aspect of the organic EL device of the present embodiment, the first light-emitting layer contains a first light-emitting compound. In one aspect of the organic EL device of the present embodiment, the first light-emitting compound is a compound that exhibits light emission having a maximum peak wavelength of 500 nm or less.

[0158] In one aspect of the organic EL device of the present embodiment, the light-emitting region includes a second light-emitting layer. In one aspect of the organic EL element of the present embodiment, the second emitting layer contains a third host material, and the first host material, the second host material, and the third host material are different from each other. In one aspect of the organic EL device of this embodiment, the triplet energy T 1 The triplet energy T of (H1) and the third host material 1 (H3) satisfies the relationship of the following mathematical formula (Math A2), and the triplet energy T 1 The triplet energy T of (H2) and the third host material 1 (H3) satisfies the relationship of the following formula (A3). T 1 (H1)>T 1 (H3) …(Number A2) T 1 (H2)>T 1 (H3) …(Number A3)

[0159] In the organic EL element of the present embodiment, by laminating the first light-emitting layer and the second light-emitting layer that satisfy the relationship of the above mathematical formulas (Math A2) and (Math A3), the effect of laminating the light-emitting layers can be expected, similarly to the first embodiment.

[0160] In one aspect of the organic EL device of the present embodiment, the first light-emitting layer is disposed between the anode and the second light-emitting layer.

[0161] In one aspect of the organic EL device of the present embodiment, the second light-emitting layer contains a second light-emitting compound. In one aspect of the organic EL device of the present embodiment, the first light-emitting compound and the second light-emitting compound are the same or different from each other.

[0162] In one aspect of the organic EL device of the present embodiment, the second light-emitting compound is a compound that exhibits light emission having a maximum peak wavelength of 500 nm or less.

[0163] (First Hole Transporting Region) In one aspect of the organic EL device of this embodiment, a first hole transport zone made of a plurality of organic layers is disposed between the anode and the first light-emitting region. In one aspect of the organic EL device of the present embodiment, the first hole-transporting region includes a first anode-side organic layer. In one aspect of the organic EL element of the present embodiment, the first hole-transporting region includes the first anode-side organic layer, the second anode-side organic layer, and the third anode-side organic layer. In one aspect of the organic EL element of the present embodiment, the third anode-side organic layer, the second anode-side organic layer, and the first anode-side organic layer are disposed in this order from the anode side.

[0164] (First Anode Side Organic Layer) In one aspect of the organic EL device of this embodiment, the first anode-side organic layer is disposed between the light-emitting region and the anode. In one aspect of the organic EL element of the present embodiment, the first light-emitting layer is in direct contact with the first anode-side organic layer. In one aspect of the organic EL element of the present embodiment, the first anode-side organic layer contains a first material. In one aspect of the organic EL element of the present embodiment, the first material, the first host material, and the second host material are different from each other. In one aspect of the organic EL element of the present embodiment, when the light-emitting region includes a second light-emitting layer, the first material, the first host material, the second host material, and the third host material are different from each other. In one aspect of the organic EL element of the present embodiment, the highest occupied molecular orbital energy level HOMO(HT1) of the first material, the highest occupied molecular orbital energy level HOMO(H1) of the first host material, and the highest occupied molecular orbital energy level HOMO(H2) of the second host material satisfy the relationship of the following mathematical formula (Math A1). HOMO(HT1)>HOMO(H2)>HOMO(H1) …(Math A1)

[0165] The configuration of the organic EL element of this embodiment will be described in more detail in the section "Common Configuration of Each Embodiment" below.

[0166] Third Embodiment (composition) The composition of the present embodiment contains a first compound and a second compound, the first compound and the second compound being different from each other, and the first compound and the second compound each independently contain at least one of a structure satisfying the following condition (i) and a structure satisfying the following condition (ii) in the molecule:

[0167] Condition (i) The compound has a biphenyl structure in which a first benzene ring and a second benzene ring are linked by a single bond, and the first benzene ring and the second benzene ring in the biphenyl structure are further linked by a bridge in at least one portion other than the single bond.

[0168] Condition (ii) The compound has a first connecting structure including a benzene ring and a naphthalene ring connected by a single bond, and the benzene ring and the naphthalene ring in the first connecting structure are each independently further fused with a single ring or a fused ring or are not fused with a fused ring, and the benzene ring and the naphthalene ring in the first connecting structure are further connected by a bridge in at least one portion other than the single bond.

[0169] The composition of the present embodiment can be used in an organic EL device. By using the composition of the present embodiment in an organic EL device, the performance of the device can be improved. The composition of the present embodiment can also be used to form an emitting layer of an organic EL element. By using the composition of the present embodiment in the emitting layer of an organic EL element, it is possible to provide an organic EL element capable of maintaining luminous efficiency and extending the life of the element.

[0170] In one aspect of the composition of this embodiment, at least one of the first compound and the second compound contains a structure that satisfies the above condition (i) in the molecule.

[0171] In one aspect of the composition of the present embodiment, the first benzene ring and the second benzene ring in the biphenyl structure of the above condition (i) are further linked by the bridge of the above condition (i) at one moiety other than the single bond. At least one of the first compound and the second compound has a biphenyl structure containing such a bridge, and therefore, when the composition of the present embodiment is used in the light-emitting layer of an organic EL device, it is expected that deterioration in chromaticity can be suppressed.

[0172] In one aspect of the composition of the present embodiment, the first benzene ring and the second benzene ring in the biphenyl structure of the above condition (i) are further linked by the bridge of the above condition (i) at two moieties other than the single bond.

[0173] In one aspect of the composition of the present embodiment, the crosslink in proviso (i) above comprises a double bond.

[0174] In one aspect of the composition of the present embodiment, the crosslinks of proviso (i) do not contain double bonds.

[0175] In one aspect of the composition of the present embodiment, at least one of the first compound and the second compound has a structure of the condition (i) in the molecule, the first benzene ring and the second benzene ring in the biphenyl structure are further connected by the bridge at two parts other than the single bond, and the bridge does not contain a double bond. Since at least one of the first compound and the second compound has a biphenyl structure containing such a bridge, it is expected that the deterioration of chromaticity can be suppressed when the composition of the present embodiment is used in the light-emitting layer of an organic EL device.

[0176] For example, when the first benzene ring and the second benzene ring in the biphenyl structure represented by the following formula (BP1) are further linked by a bridge at at least one portion other than a single bond, the biphenyl structure becomes a linked structure (condensed ring) such as the following formulae (BP11) to (BP15).

[0177] [ka]

[0178] The formula (BP11) is a structure linked by a bridge that does not contain a double bond in one part other than the single bond. The formula (BP12) is a structure in which the two groups are linked by a bridge containing a double bond in one part other than the single bond. The formula (BP13) is a structure in which the two moieties other than the single bond are linked by a bridge that does not contain a double bond. The formula (BP14) has a structure in which one of the two moieties other than the single bond is linked by a bridge that does not contain a double bond, and the other of the two moieties other than the single bond is linked by a bridge that contains a double bond. The formula (BP15) is a structure in which the two moieties other than the single bond are linked by a bridge containing a double bond.

[0179] In one aspect of the composition of this embodiment, at least one of the first compound and the second compound contains a structure that satisfies the above condition (ii) in the molecule.

[0180] At least one of the first compound and the second compound has a linking structure including such a crosslink, and therefore, when the composition of the present embodiment is used in the light-emitting layer of an organic EL device, it is expected that deterioration in chromaticity can be suppressed. In this case, at least one of the first compound and the second compound has a first linking structure (sometimes referred to as a benzene-naphthalene linking structure) containing a benzene ring and a naphthalene ring linked by a single bond in the molecule, as represented by the following formula (X1) or formula (X2), as a minimum unit, and the benzene ring may be further condensed with a single ring or a condensed ring, or the naphthalene ring may be further condensed with a single ring or a condensed ring. For example, when at least one of the first compound and the second compound has a second linking structure (sometimes referred to as a naphthalene-naphthalene linking structure) containing a naphthalene ring and a naphthalene ring linked by a single bond in the molecule, as represented by the following formula (X3), formula (X4), or formula (X5), one of the naphthalene rings contains a benzene ring, so it contains a benzene-naphthalene linking structure.

[0181] [ka]

[0182] In one aspect of the composition of the present embodiment, the bridge in condition (ii) contains a double bond. In other words, it is also preferable that the benzene ring and the naphthalene ring have a structure in which they are further connected by a bridge structure containing a double bond in a portion other than a single bond.

[0183] When the benzene ring and the naphthalene ring in the first linking structure (benzene-naphthalene linking structure) are further linked by a bridge at at least one portion other than a single bond, for example, in the case of the formula (X1), the linking structure (fused ring) is represented by the following formula (X11), and in the case of the formula (X3), the linking structure (fused ring) is represented by the following formula (X31). When the benzene ring and the naphthalene ring in the benzene-naphthalene linked structure are further linked by a bridge containing a double bond in a portion other than the single bond, for example, in the case of the formula (X1), the linked structure (fused ring) represented by the following formula (X12) is obtained; in the case of the formula (X2), the linked structure (fused ring) represented by the following formula (X21), formula (X22), or formula (X23) is obtained; in the case of the formula (X4), the linked structure (fused ring) represented by the following formula (X41) is obtained; and in the case of the formula (X5), the linked structure (fused ring) represented by the following formula (X51) is obtained. When the benzene ring and the naphthalene ring in the benzene-naphthalene linked structure are further linked by a bridge containing a heteroatom (e.g., an oxygen atom) in at least one portion other than a single bond, for example, in the case of the above formula (X1), the linked structure (fused ring) is represented by the following formula (X13).

[0184] [ka]

[0185] In one aspect of the composition of this embodiment, the first compound and the second compound are each independently any compound selected from the group consisting of a compound represented by the following general formula (H11), a compound represented by the general formula (H12), a compound represented by the general formula (H13), a compound represented by the general formula (H14), a compound represented by the general formula (H15), and a compound represented by the general formula (H16).

[0186] (Compound represented by general formula (H11)) The compound represented by general formula (H11) will be described.

[0187] [ka]

[0188] (In the general formula (H11), R 101 ~R 110 , and R 111 ~R 120 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 A group represented by -COOR 802 A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, However, R 101 ~R 110 One of them is L 101 indicates the bond position with R 111 ~R 120 One of them is L 101 indicates the bonding position with L 101 teeth, Single bond, a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms, mx is 0, 1, 2, 3, 4 or 5; L 101 If there are two or more, there are two or more L 101 are either identical or different.)

[0189] (In the first compound and the second compound, R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are multiple R 901 are the same or different from each other, R 902 If there are multiple R 902 are the same or different from each other, R 903 If there are multiple R 903 are the same or different from each other, R 904 If there are multiple R 904 are the same or different from each other, R 905 If there are multiple R 905 are the same or different from each other, R 906 If there are multiple R 906 are the same or different from each other, R 907 If there are multiple R 907 are the same or different from each other, R 801 If there are multiple R 801 are the same or different from each other, R 802 If there are multiple R 802are either identical or different.)

[0190] In one aspect of the composition of the present embodiment, the compound represented by general formula (H11) is a compound represented by the following general formula (H111).

[0191] [ka]

[0192] (In the general formula (H111), R 101 , R 102 , R 104 ~R 110 , and R 111 ~R 119 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 A group represented by -COOR 802 A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L 101 and mx each represent L in the general formula (H11). 101 and mx.)

[0193] In one aspect of the composition of this embodiment, mx is 1 or 2.

[0194] In one aspect of the composition of this embodiment, L 101 represents a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms.

[0195] In one aspect of the composition of the present embodiment, at least one of the first compound and the second compound is a compound having only two pyrene rings in the molecule (sometimes referred to as a bispyrene compound). In one aspect of the composition of the present embodiment, the compound represented by general formula (H11) is a bispyrene compound.

[0196] (Compound represented by general formula (H12)) The compound represented by general formula (H12) will be described.

[0197] [ka]

[0198] (In the general formula (H12), Xa is an oxygen atom, a sulfur atom, or a C(R 1201 )(R 1202 ), or Si(R 1203 )(R 1204 ) and R 1201 ~R 1204 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -N(R 906 )(R 907 ) a group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 121 ~R 130 Among the groups of two or more adjacent joined together to form a substituted or unsubstituted monocyclic ring, or combine with each other to form a substituted or unsubstituted fused ring, or Not bonded to each other, R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted condensed ring. 121 ~R 130 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -N(R 906 )(R 907 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 A group represented by -COOR 802 A group represented by Halogen atoms, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or A group represented by the general formula (H121), However, R 121 ~R 130 At least one of the above is a group represented by general formula (H121), When a plurality of groups represented by the general formula (H121) are present, the plurality of groups represented by the general formula (H121) are the same or different from each other, L 12 teeth, Single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, ma is 0, 1, 2 or 3; L 12 If there are two or more, there are two or more L 12 are identical or different from each other, Ar 12 represents a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, Ar 12 If there are two or more, there are two or more Ar 12 are identical or different from each other, In the above general formula (H121), * indicates the bond position.

[0199] In one aspect of the composition of this embodiment, L 12represents a single bond, a substituted or unsubstituted arylene group having 6 to 15 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 15 ring atoms.

[0200] In one aspect of the composition of this embodiment, Ar 12 is a substituted or unsubstituted aryl group containing four or more rings or a substituted or unsubstituted heterocyclic group containing four or more rings.

[0201] In one aspect of the composition of this embodiment, Ar 12 is a substituted or unsubstituted aryl group containing four or more rings.

[0202] In one aspect of the composition of this embodiment, R 129 is a group represented by general formula (H121).

[0203] In one aspect of the composition of this embodiment, Xa is an oxygen atom.

[0204] In one aspect of the composition of the present embodiment, the compound represented by the general formula (H12) is a compound represented by the following general formula (H122).

[0205] [ka]

[0206] (In the general formula (H122), R 121 ~R 128 And R 130 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -N(R 906 )(R 907 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 A group represented by -COOR 802 A group represented by Halogen atoms, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, Ar 12 , L 12 and ma each represent the Ar 12 , L 12 and ma).

[0207] In one aspect of the composition of this embodiment, ma is 1 or 2.

[0208] (Compound represented by general formula (H13)) The compound represented by general formula (H13) will be described.

[0209] [ka]

[0210] (In the general formula (H13), R 131 ~R 140 , Ar 131 and Ar 132 are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 A group represented by -COOR 802 A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or A group represented by the general formula (H131), However, R 131 ~R 140 , Ar 131 and Ar 132 At least one of the above is a group represented by general formula (H131), When a plurality of groups represented by the general formula (H131) are present, the plurality of groups represented by the general formula (H131) are the same or different from each other, L 13 teeth, Single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar 13 teeth, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, mb is 0, 1, 2, 3, 4 or 5; L 13 If there are two or more, there are two or more L 13 are identical or different from each other, Ar 13 If there are two or more, there are two or more Ar 13 are identical or different from each other, In the general formula (H131), * indicates the bonding position to the benz[a]anthracene ring in the general formula (H13).

[0211] In one aspect of the composition of this embodiment, Ar 131 and Ar 132 At least one of these is a group represented by general formula (H131).

[0212] In one aspect of the composition of the present embodiment, the compound represented by the general formula (H13) is a compound represented by the following general formula (H132) or (H133).

[0213] [ka]

[0214] (In the general formulae (H132) and (H133), R 131 ~R 140 , Ar 131 and Ar 132 are, respectively, Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 A group represented by -COOR 802 A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L 13 , Ar 13 and mb each represent L in the general formula (H131). 13 , Ar 13 and mb.)

[0215] In one aspect of the composition of this embodiment, mb is 0, 1 or 2.

[0216] (Compound represented by general formula (H14)) The compound represented by general formula (H14) will be described.

[0217] [ka]

[0218] (In the general formula (H14), R 1A and R 1B are each independently a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms; a substituted or unsubstituted aryl group having 6 to 17 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 17 ring atoms, However, R 1A and R 1B At least one of the groups is a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, R 141 ~R 144 A pair of two or more adjacent 145 ~R 148 Any one of the pairs of two or more adjacent pairs of joined together to form a substituted or unsubstituted monocyclic ring, or combine with each other to form a substituted or unsubstituted fused ring; The group represented by the general formula (H141) is When a substituted or unsubstituted monocyclic ring or a substituted or unsubstituted condensed ring is formed on the ring A side, R 142 or the carbon atom C on the ring B side among the carbon atoms constituting the monocyclic ring on the ring A side and the condensed ring on the ring A side 2 Carbon atom C of ring A bonded to 1 Attached to the carbon atom furthest from In the case where a substituted or unsubstituted monocyclic ring or a substituted or unsubstituted condensed ring is not formed on the ring A side but is formed on the ring B side, R 142 Attached to a carbon atom attached to R which is not a group represented by the general formula (H141) 142 R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted condensed ring. 141 , R 143 , R 144 and R 145 ~R 148 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -N(R 906 )(R 907 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 A group represented by -COOR 802 A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 17 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 17 ring atoms, In the general formula (H141), Ar 14 is a substituted or unsubstituted aryl group having four or more condensed rings or a substituted or unsubstituted heterocyclic group having four or more condensed rings, L 14 teeth, Single bond, a substituted or unsubstituted arylene group having 6 to 17 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 17 ring atoms, mc is 0, 1 or 2; * indicates the bonding position to an atom constituting the ring of general formula (H14), However, the compound represented by the general formula (H14) does not contain three or more substituted or unsubstituted aryl groups having four or more condensed rings and three or more substituted or unsubstituted heterocyclic groups having four or more condensed rings in the molecule of the compound represented by the general formula (H14).

[0219] In one aspect of the composition of this embodiment, R142 is a group represented by general formula (H141).

[0220] In one aspect of the composition of this embodiment, in the compound represented by general formula (H14), R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 are each 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 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 17 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 17 ring atoms.

[0221] In one aspect of the composition of the present embodiment, the compound represented by general formula (H14) is a compound represented by the following general formula (H142), general formula (H143), or general formula (H144).

[0222] [ka]

[0223] [ka]

[0224] (In the general formula (H142), general formula (H143) or general formula (H144), R 1A , R 1B , R 141 , R 143 , R 144 , R 145 , R 146 , R 147 and R 148 respectively represent R in the general formula (H14). 1A , R 1B , R 141 , R 143 , R 144 , R145 , R 146 , R 147 and R 148 is synonymous with Ar 14 , L 14 and mc each represent the Ar 14 , L 14 and mc, R 1401 ~R 1404 one or more of the adjacent pairs of R 1401 ~R 1404 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -N(R 906 )(R 907 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 A group represented by -COOR 802 A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 17 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 17 ring atoms.

[0225] In one aspect of the composition of this embodiment, mc is 0, 1 or 2.

[0226] (Compound represented by general formula (H15)) The compound represented by general formula (H15) will be described.

[0227] [ka]

[0228] (In the general formula (H15), R 150 ~R 159 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 A group represented by -COOR 802 A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or A group represented by the general formula (H150), However, R 150 ~R 159 At least one of the above is a group represented by general formula (H150), When a plurality of groups represented by the general formula (H150) are present, the plurality of groups represented by the general formula (H150) are the same or different from each other, L 151 teeth, Single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar 151 teeth, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, mg is 0, 1, 2, 3, 4 or 5; L 151 If there are two or more, there are two or more L 151 are identical or different from each other, Ar 151 If there are two or more, there are two or more Ar 151 are identical or different from each other, In the general formula (H150), * indicates the bonding position to the pyrene ring in the general formula (H15).

[0229] In one aspect of the composition of this embodiment, R 153 is a group represented by general formula (H150).

[0230] In one aspect of the composition of this embodiment, L 151 is a single bond or a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, Ar 151 is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.

[0231] In one aspect of the composition of this embodiment, L 151is a single bond or a substituted or unsubstituted arylene group having 6 to 14 ring carbon atoms, Ar 151 is a substituted or unsubstituted aryl group having 6 to 14 ring carbon atoms.

[0232] In one aspect of the composition of the present embodiment, the group represented by general formula (H150) is a group represented by general formula (H151) below.

[0233] [ka]

[0234] (In the general formula (H151), X 15 is an oxygen atom or a sulfur atom, L 15 teeth, Single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, md is 0, 1, 2, 3, 4 or 5; L 15 If there are two or more, there are two or more L 15 are identical or different from each other, R 1500 ~R 1504 At least one pair of adjacent pairs of joined together to form a substituted or unsubstituted monocyclic ring, or combine with each other to form a substituted or unsubstituted fused ring, or Not bonded to each other, R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted condensed ring. 1500 ~R 1504 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 A group represented by -COOR 802 A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, Multiple R 1500 are the same or different from each other, When a plurality of groups represented by the general formula (H151) are present, the plurality of groups represented by the general formula (H151) are the same or different from each other, In the general formula (H151), * indicates the bonding position to the pyrene ring in the general formula (H15).

[0235] In one aspect of the composition of this embodiment, the compound represented by the general formula (H15) is a compound represented by the following general formula (H152): 153 When is a group represented by general formula (H151), it is represented by the following general formula (H152).

[0236] [ka]

[0237] (In the general formula (H152), R 150 ~R 152 And R 154 ~R 159 are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 A group represented by -COOR 802 A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, X 15 , L 15 and md each represent X in the general formula (H151). 15 , L 15 and md, R 1500 ~R 1504 each independently represents R in general formula (H151). 1500 ~R 1504 is equivalent to

[0238] In one aspect of the composition of this embodiment, md is 0, 1 or 2. In one aspect of the composition of the present embodiment, when md is 0, the compound represented by general formula (H152) above is represented by the following general formula (H153).

[0239] [ka]

[0240] (In the general formula (H153), R 150 ~R 152 , R 154 ~R 159 , R 1500 ~R 1504 , and X 15 respectively represent R in the general formula (H152). 150 ~R 152 , R 154 ~R 159 , R 1500 ~R 1504 , and X 15 is equivalent to

[0241] In one aspect of the composition of the present embodiment, at least one of the first compound and the second compound is a compound having only one pyrene ring in the molecule (sometimes referred to as a monopyrene compound). In one aspect of the composition of the present embodiment, the compound represented by general formula (H15) is a monopyrene compound.

[0242] (Compound represented by general formula (H16)) The compound represented by general formula (H16) will be described.

[0243] [ka]

[0244] (In the general formula (H16), R 160 ~R 169At least one pair of adjacent pairs of joined together to form a substituted or unsubstituted monocyclic ring, or combine with each other to form a substituted or unsubstituted fused ring, or Not bonded to each other, R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted condensed ring. 160 ~R 169 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 A group represented by -COOR 802 A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or A group represented by general formula (H161), However, when the substituted or unsubstituted monocyclic ring has a substituent, the substituent when the substituted or unsubstituted condensed ring has a substituent, and R 160 ~R 169At least one of the above is a group represented by general formula (H161), When a plurality of groups represented by the general formula (H161) are present, the plurality of groups represented by the general formula (H161) are the same or different from each other, L 16 teeth, Single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar 16 teeth, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, mf is 0, 1, 2, 3, 4 or 5; L 16 If there are two or more, there are two or more L 16 are identical or different from each other, Ar 16 If there are two or more, there are two or more Ar 16 are identical or different from each other, In the general formula (H161), * indicates the bonding position to the ring represented by the general formula (H16).

[0245] In one aspect of the composition of the present embodiment, at least one of the first compound and the second compound is a compound represented by the following general formula (H162).

[0246] [ka]

[0247] (In the general formula (H162), R 161 ~R 167 And R 1601 ~R 1604 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 A group represented by -COOR 802 A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, Ar 16 , L 16 and mf are each the Ar 16 , L 16 and mf.)

[0248] In one aspect of the composition of this embodiment, mf is 0, 1 or 2.

[0249] In one aspect of the composition of this embodiment, the first compound and the second compound are each independently any compound selected from the group consisting of the compound represented by general formula (H111), the compound represented by general formula (H122), the compound represented by general formula (H132), and the compound represented by general formula (H133).

[0250] In one aspect of the composition of the present embodiment, the first compound and the second compound do not have a bis-carbazole structure and an amine structure in their molecules.

[0251] The composition according to one aspect of this embodiment does not contain a compound having a bis-carbazole structure or a compound having an amine structure.

[0252] In one aspect of the composition of this embodiment, the groups described as "substituted or unsubstituted" in the first compound and the second compound are both "unsubstituted" groups.

[0253] In one aspect of the composition of this embodiment, the first compound and the second compound are each independently a compound represented by general formula (H11) above.

[0254] In one aspect of the composition of this embodiment, the first compound and the second compound are each independently a compound represented by general formula (H111) above.

[0255] In one aspect of the composition of this embodiment, the first compound is a compound represented by the general formula (H11) and the second compound is a compound represented by the general formula (H12).

[0256] In one aspect of the composition of this embodiment, the first compound is a compound represented by the general formula (H111) and the second compound is a compound represented by the general formula (H122).

[0257] In one aspect of the composition of this embodiment, the first compound is a compound represented by the general formula (H11) and the second compound is a compound represented by the general formula (H16).

[0258] In one aspect of the composition of this embodiment, the first compound is a compound represented by the general formula (H111), and the second compound is a compound represented by the general formula (H162).

[0259] In one aspect of the composition of this embodiment, at least one of the first compound and the second compound has a ring containing a heteroatom in the molecule. The energy level of the highest occupied molecular orbital (HOMO) of a compound having a ring containing a heteroatom in the molecule tends to be large.

[0260] (Method for Producing the First Compound and the Second Compound) The first compound and the second compound can be produced by a known method. The first compound and the second compound can also be produced by following a known method and using known alternative reactions and raw materials suited to the target product.

[0261] (Specific Examples of the First Compound and the Second Compound) Specific examples of the first compound and the second compound include the following compounds, however, the present invention is not limited to these specific examples of the first compound and the second compound. In this specification, in specific examples of compounds, D represents a deuterium atom, Me represents a methyl group, tBu represents a tert-butyl group, and Ph represents a phenyl group.

[0262] [ka]

[0263] [ka]

[0264] [ka]

[0265] [ka]

[0266] [ka]

[0267]

change

[0268]

change

[0269]

change

[0270]

change

[0271]

change

[0272]

change

[0273]

change

[0274]

change

[0275]

change

[0276]

change

[0277]

change

[0278]

change

[0279]

change

[0280]

change

[0281]

change

[0282]

change

[0283]

change

[0284]

change

[0285]

change

[0286]

change

[0287]

change

[0288]

change

[0289]

change

[0290]

change

[0291]

change

[0292]

change

[0293]

change

[0294]

change

[0295]

change

[0296]

change

[0297]

change

[0298]

change

[0299]

change

[0300]

change

[0301]

change

[0302]

change

[0303]

change

[0304]

change

[0305]

change

[0306]

change

[0307]

change

[0308]

change

[0309]

change

[0310]

change

[0311]

change

[0312]

change

[0313]

change

[0314]

change

[0315]

change

[0316]

change

[0317]

change

[0318]

change

[0319]

change

[0320]

change

[0321]

change

[0322]

change

[0323]

change

[0324]

change

[0325]

change

[0326]

change

[0327]

change

[0328]

change

[0329]

change

[0330]

change

[0331]

change

[0332]

change

[0333]

change

[0334]

change

[0335]

change

[0336]

change

[0337]

change

[0338]

change

[0339]

change

[0340]

change

[0341]

change

[0342]

change

[0343]

change

[0344]

change

[0345]

change

[0346]

change

[0347]

change

[0348]

change

[0349]

change

[0350]

change

[0351]

change

[0352]

change

[0353]

change

[0354]

change

[0355]

change

[0356]

change

[0357]

change

[0358]

change

[0359]

change

[0360]

change

[0361]

change

[0362]

change

[0363] [ka]

[0364] [ka]

[0365] [ka]

[0366] [ka]

[0367] [ka]

[0368] [ka]

[0369] [ka]

[0370] [ka]

[0371] The configuration of the composition of this embodiment will be further explained in the section "Common Configuration of Each Embodiment" described later.

[0372] Fourth Embodiment (composition) The composition of the present embodiment contains a first compound and a second compound, the first compound and the second compound being different from each other, the highest occupied molecular orbital (HOMO) of the first compound and the highest occupied molecular orbital (HOMO) of the second compound satisfy the relationship of the following mathematical formula (Math. A7), and the triplet energy T 1 (C1) satisfies the relationship of the following mathematical formula (Math. A8), and the triplet energy T 1 (C2) satisfies the relationship of the following formula (math A9). HOMO(C2)>HOMO(C1) …(Math A7) 1.8eV <T 1 (C1)<2.5eV …(Number A8) 1.8eV <T 1 (C2)<2.5eV …(Number A9)

[0373] In one aspect of the composition of this embodiment, the triplet energy T 1 (C1) satisfies the relationship of the following formula (Math. A81), and the triplet energy T 1 (C2) satisfies the relationship of the following equation (math A91). 2.0eV <T 1 (C1)<2.3eV …(Number A81) 2.0eV <T 1 (C2)<2.3eV …(Number A91)

[0374] In one aspect of the composition of the present embodiment, the HOMO(C2) satisfies the relationship of the following mathematical formula (Math A12). HOMO(C2)>-5.7eV …(Math A12)

[0375] In one aspect of the composition of the present embodiment, the HOMO(C2) satisfies the relationship of the following mathematical formula (Math. A121). HOMO(C2)≧-5.6eV …(Number A121)

[0376] In one aspect of the composition of the present embodiment, the HOMO(C2) satisfies the relationship of the following mathematical formula (Math. A122). HOMO(C2)≧-5.5eV …(Number A122)

[0377] In one aspect of the composition of the present embodiment, the HOMO(C1) satisfies the relationship of the following mathematical formula (Math A13). -5.6eV>HOMO(C1) …(Math A13)

[0378] In one aspect of the composition of the present embodiment, the HOMO(C1) satisfies the relationship of the following mathematical formula (Math. A131). -5.7eV≧HOMO(C1) …(Number A131)

[0379] In one aspect of the composition of the present embodiment, the HOMO (C1) satisfies the relationship of the above-mentioned mathematical formula (Math. A131), and the HOMO (C2) satisfies the relationship of the above-mentioned mathematical formula (Math. A12).

[0380] In one aspect of the composition of the present embodiment, the HOMO (C1) satisfies the relationship of the above-mentioned mathematical formula (Math. A131), and the HOMO (C2) satisfies the relationship of the above-mentioned mathematical formula (Math. A121).

[0381] In one aspect of the composition of the present embodiment, the HOMO (C1) satisfies the relationship of the above-mentioned mathematical formula (Math. A131), and the HOMO (C2) satisfies the relationship of the above-mentioned mathematical formula (Math. A122).

[0382] In one aspect of the composition of this embodiment, the first compound and the second compound are the first compound and the second compound of the third embodiment.

[0383] The composition of the present embodiment can be used in an organic EL device. By using the composition of the present embodiment in an organic EL device, the performance of the device can be improved. The composition of the present embodiment can also be used to form an emitting layer of an organic EL element. By using the composition of the present embodiment in the emitting layer of an organic EL element, it is possible to provide an organic EL element capable of maintaining luminous efficiency and extending the life of the element.

[0384] The configuration of the composition of this embodiment will be further explained in the section "Common Configuration of Each Embodiment" described later.

[0385] Fifth Embodiment (Organic electroluminescence element) The organic electroluminescent device of the present embodiment has an anode, a cathode, and a light-emitting region disposed between the anode and the cathode, the light-emitting region including a first light-emitting layer, and the first light-emitting layer contains the composition according to the third embodiment or the composition according to the fourth embodiment.

[0386] According to this embodiment, a suitable organic electroluminescence element can be provided.

[0387] (Light emitting area) The organic EL device of the present embodiment has a light-emitting region including a first light-emitting layer. The light-emitting region of the present embodiment may include only the first light-emitting layer, or may include an organic layer different from the first light-emitting layer.

[0388] In the organic EL device of the present embodiment, the first emitting layer contains the first compound and the second compound contained in the composition according to the third embodiment or the composition according to the fourth embodiment. In one aspect of the organic EL element of the present embodiment, the first compound is a first host material, and the second compound is a second host material. In the organic EL element of the present embodiment, the first host material and the second host material are different compounds.

[0389] In one aspect of the organic EL device of the present embodiment, the first light-emitting layer contains a first light-emitting compound.

[0390] In one aspect of the organic EL device of the present embodiment, the first light-emitting compound is a compound that exhibits light emission having a maximum peak wavelength of 500 nm or less.

[0391] In one aspect of the organic EL device of the present embodiment, the light-emitting region includes a second light-emitting layer. In one aspect of the organic EL device of the present embodiment, the second emitting layer contains a third compound, and the first compound, the second compound, and the third compound are different from each other. In one aspect of the organic EL device of this embodiment, the triplet energy T 1 The triplet energy T of (C1) and the third compound 1 (C3) satisfies the relationship of the following formula (Math. A14), and the triplet energy T 1 The triplet energy T of (C2) and the third compound 1 (C3) satisfy the relationship of the following formula (Math A15). T 1 (C1)>T 1 (C3) ...(Math A14) T 1 (C2)>T 1 (C3) ...(Math A15)

[0392] In the organic EL element of this embodiment, by laminating a first light-emitting layer and a second light-emitting layer that satisfy the relationship of the above mathematical formulas (Math. A14) and (Math. A15), the effect of laminating the light-emitting layers can be expected, as in the first embodiment.

[0393] In one aspect of the organic EL device of the present embodiment, the first light-emitting layer is disposed between the anode and the second light-emitting layer.

[0394] In one aspect of the organic EL device of the present embodiment, the second light-emitting layer contains a second light-emitting compound. In one aspect of the organic EL device of the present embodiment, the first light-emitting compound and the second light-emitting compound are the same or different from each other.

[0395] In one aspect of the organic EL device of the present embodiment, the second light-emitting compound is a compound that exhibits light emission having a maximum peak wavelength of 500 nm or less.

[0396] In one aspect of the organic EL device of this embodiment, a first hole transport zone similar to that of the second embodiment is disposed between the light-emitting region and the anode.

[0397] In one aspect of the organic EL element of this embodiment, a first anode-side organic layer similar to that of the second embodiment is disposed between the light-emitting region and the anode.

[0398] The configuration of the organic EL element of this embodiment will be described in more detail in the section "Common Configuration of Each Embodiment" below.

[0399] [Common configuration of each embodiment] A configuration that can be commonly applied to each embodiment described in this specification will be described.

[0400] (First Light-Emitting Layer) In the organic EL device of each embodiment, the first host material and the second host material are contained in a single first light-emitting layer. In one aspect of the organic EL device of each embodiment, the first emitting layer contains a first host material and a first emitting compound. The first host material is a compound different from the second host material and the third host material.

[0401] In one aspect of the organic EL device of each embodiment, the first light-emitting compound is a compound that emits light having a maximum peak wavelength of 430 nm or more and 480 nm or less.

[0402] In one aspect of the organic EL device of each embodiment, the first light-emitting compound is a fluorescent compound that exhibits fluorescent emission having a maximum peak wavelength of 500 nm or less.

[0403] In one aspect of the organic EL device of each embodiment, the first light-emitting compound is a fluorescent compound that exhibits fluorescent emission having a maximum peak wavelength of 430 nm or more and 480 nm or less.

[0404] In one aspect of the organic EL device of each embodiment, the first light-emitting compound is a compound that does not contain an azine ring structure in the molecule.

[0405] In one aspect of the organic EL device of each embodiment, the first light-emitting compound is not a boron-containing complex. In one aspect of the organic EL device of each embodiment, the first light-emitting compound is not a complex.

[0406] In one aspect of the organic EL device of each embodiment, the first emitting layer does not contain a metal complex. In one aspect of the organic EL device of each embodiment, the first light-emitting layer does not contain a boron-containing complex.

[0407] In one aspect of the organic EL device of each embodiment, the first emitting layer does not contain a phosphorescent material (dopant material). In one aspect of the organic EL device of each embodiment, the first light-emitting layer does not contain a heavy metal complex or a phosphorescent rare earth metal complex, for example, an iridium complex, an osmium complex, or a platinum complex.

[0408] In the emission spectrum of the first luminescent compound, the peak at which the emission intensity is maximum is defined as the maximum peak, and when the height of the maximum peak is defined as 1, the heights of other peaks appearing in the emission spectrum are preferably less than 0.6. Note that the peaks in the emission spectrum are defined as maximum values. In addition, it is preferable that the emission spectrum of the first luminescent compound has less than three peaks.

[0409] In one aspect of the organic EL device of each embodiment, the singlet energy S 1 (H1), the singlet energy S of the second host material 1 (H2) and the singlet energy S of the first emissive compound 1 (D1) satisfies the relationships of the following mathematical expressions (11) and (12). S 1 (H1)>S 1 (D1) ...(Number 11) S 1 (H2)>S 1 (D1) ...(Number 12) Singlet energy S 1 means the energy difference between the lowest excited singlet state and the ground state.

[0410] When the first host material, the second host material, and the first light-emitting compound satisfy the relationship of the above-mentioned mathematical formulas (Mathematical Formula 11) and (Mathematical Formula 12), the singlet excitons generated on the first host material and the second host material can easily transfer energy from the first host material and the second host material to the first light-emitting compound, contributing to the fluorescent emission of the first light-emitting compound.

[0411] In one aspect of the organic EL element of each embodiment, the first host material, the second host material, and the first light-emitting compound satisfy the relationships of the following mathematical formulas (Mathematical Formula 13) and (Mathematical Formula 14). T 1 (D1)>T 1 (H1) …(Number 13) T 1 (D1)>T 1 (H2) ...(Number 14)

[0412] When the first host material, the second host material, and the first light-emitting compound satisfy the relationships of the above-mentioned mathematical formulas (13) and (14), triplet excitons generated in the first light-emitting layer move through the first host material or the second host material, rather than through the first light-emitting compound having a higher triplet energy, and therefore are more likely to move to the second light-emitting layer.

[0413] In one aspect of the organic EL element of each embodiment, the first host material, the second host material, the third host material, and the first light-emitting compound satisfy the relationships of the following mathematical formulas (Mathematical Formula 15) and (Mathematical Formula 16). T 1 (D1)>T 1 (H1)>T 1 (H3) …(Number 15) T 1 (D1)>T 1 (H2)>T 1 (H3) …(Number 16)

[0414] In one aspect of the organic EL device of each embodiment, the first emitting layer contains the first emitting compound in an amount of 0.5 mass % or more, or 1 mass % or more, of the total mass of the first emitting layer.

[0415] In one aspect of the organic EL element of each embodiment, the first light-emitting layer contains the first light-emitting compound in an amount of 10 mass % or less, 7 mass % or less, or 5 mass % or less of the total mass of the first light-emitting layer.

[0416] In one aspect of the organic EL device of each embodiment, the mass M of the first host material in the first emitting layer H1 and the mass M of the second host material H2 Total of M H1 +M H2 Mass M of the second host material H2 The mass percentage of is 5 mass % or more and 60 mass % or less.

[0417] In one aspect of the organic EL element of each embodiment, a total of M H1 +M H2 Mass M of the second host material H2 is 8 mass % or more, 15 mass % or more, 25 mass % or more, or 35 mass % or more. In one aspect of the organic EL element of each embodiment, a total of M H1 +M H2 Mass M of the second host material H2 The mass percentage of is 55 mass % or less.

[0418] In one aspect of the organic EL element of each embodiment, the first emitting layer contains the first host material and the second host material in a total amount of 60 mass % or more, 70 mass % or more, 80 mass % or more, 90 mass % or more, or 95 mass % or more of the first emitting layer, based on the total mass of the first emitting layer. In one aspect of the organic EL device of each embodiment, the first emitting layer contains the first host material and the second host material in a total amount of 99 mass % or less of the total mass of the first emitting layer. In one aspect of the organic EL device of each embodiment, the upper limit of the total content of the first host material, the second host material, and the first light-emitting compound in the first light-emitting layer is 100 mass %.

[0419] In one aspect of the organic EL element of each embodiment, the thickness of the first light-emitting layer is 3 nm or more, or 5 nm or more. If the thickness of the first light-emitting layer is 3 nm or more, the thickness is sufficient to cause recombination of holes and electrons in the first light-emitting layer. In one aspect of the organic EL device of each embodiment, the thickness of the first emitting layer is 20 nm or less, or 15 nm or less. If the thickness of the first emitting layer is 20 nm or less, the thickness is thin enough for triplet excitons to transfer to the second emitting layer.

[0420] In one aspect of the organic EL device of each embodiment, the first host material is the first compound of the third embodiment, and the second host material is the second compound.

[0421] (Second Light Emitting Layer) In one aspect of the organic EL device of each embodiment, the second emitting layer contains a third host material and a second emitting compound. The third host material is a compound different from the first host material and the second host material.

[0422] In one aspect of the organic EL device of each embodiment, the second light-emitting compound is a compound that emits light having a maximum peak wavelength of 430 nm or more and 480 nm or less.

[0423] In one aspect of the organic EL device of each embodiment, the second light-emitting compound is a fluorescent compound that exhibits fluorescent emission having a maximum peak wavelength of 500 nm or less.

[0424] In one aspect of the organic EL device of each embodiment, the second light-emitting compound is a fluorescent compound that exhibits fluorescent emission having a maximum peak wavelength of 430 nm or more and 480 nm or less.

[0425] In one aspect of the organic EL device of each embodiment, the triplet energy T 1 (D2) and the triplet energy T of the third host material 1 (H3) satisfy the relationship of the following formula (Mathematical formula 22). T 1 (D2)>T1 (H3) …(Number 21)

[0426] When the second light-emitting compound and the third host material satisfy the relationship of the above formula (Mathematical Formula 21), triplet excitons generated in the first light-emitting layer transfer energy to the molecules of the third host material, rather than to the second light-emitting compound having higher triplet energy, when they move to the second light-emitting layer. Furthermore, triplet excitons generated by recombination of holes and electrons on the third host material do not transfer to the second light-emitting compound having a higher triplet energy, whereas triplet excitons generated by recombination on the molecules of the second light-emitting compound transfer their energy quickly to the molecules of the third host material. Triplet excitons in the third host material do not transfer to the second light-emitting compound, but efficiently collide with each other on the third host material due to the TTF phenomenon, generating singlet excitons.

[0427] In one aspect of the organic EL device of each embodiment, the singlet energy S 1 The singlet energy S of (H3) and the second emissive compound 1 (D2) satisfy the relationship of the following formula (Formula 22). S 1 (H3)>S 1 (D2) ...(Number 22)

[0428] When the second luminescent compound and the third host material satisfy the relationship of the above-mentioned mathematical formula (Mathematical Formula 22), the singlet energy of the second luminescent compound is smaller than the singlet energy of the third host material, and the singlet excitons generated by the TTF phenomenon transfer energy from the third host material to the second luminescent compound and contribute to the fluorescent emission of the second luminescent compound.

[0429] In one aspect of the organic EL device of each embodiment, the second light-emitting compound is a compound that does not contain an azine ring structure in the molecule.

[0430] In one aspect of the organic EL device of each embodiment, the second light-emitting compound is not a boron-containing complex. In one aspect of the organic EL device of each embodiment, the second light-emitting compound is not a complex.

[0431] In one aspect of the organic EL device of each embodiment, the second light-emitting layer does not contain a metal complex. In one aspect of the organic EL device of each embodiment, the second light-emitting layer does not contain a boron-containing complex.

[0432] In one aspect of the organic EL device of each embodiment, the second emitting layer does not contain a phosphorescent material (dopant material). In one aspect of the organic EL element of each embodiment, the second light-emitting layer does not contain a heavy metal complex or a phosphorescent rare earth metal complex, for example, an iridium complex, an osmium complex, or a platinum complex.

[0433] In one aspect of the organic EL device of each embodiment, the second emitting layer contains the second emitting compound in an amount of 0.5 mass % or more, or 1 mass % or more, of the total mass of the second emitting layer.

[0434] In one aspect of the organic EL element of each embodiment, the second light-emitting layer contains the second light-emitting compound in an amount of 10 mass % or less, 7 mass % or less, or 5 mass % or less of the total mass of the second light-emitting layer.

[0435] In one aspect of the organic EL element of each embodiment, the second emitting layer contains the second host material in an amount of 60 mass % or more, 70 mass % or more, 80 mass % or more, 90 mass % or more, or 95 mass % or more of the total mass of the second emitting layer. In one aspect of the organic EL device of each embodiment, the second emitting layer contains the second host material in an amount of 99.5% by mass or less, or 99% by mass or less, of the total mass of the second emitting layer.

[0436] In one aspect of the organic EL device of each embodiment, the thickness of the second emitting layer is 5 nm or more, or 10 nm or more. If the thickness of the second emitting layer is 5 nm or more, it is easy to suppress the triplet excitons that have moved from the first emitting layer to the second emitting layer from returning to the first emitting layer. Also, if the thickness of the second emitting layer is 5 nm or more, it is possible to sufficiently separate the triplet excitons from the recombination portion in the first emitting layer. In one aspect of the organic EL element of each embodiment, the thickness of the second light-emitting layer is 20 nm or less. If the thickness of the second light-emitting layer is 20 nm or less, the density of triplet excitons in the second light-emitting layer can be improved, making the TTF phenomenon more likely to occur.

[0437] (Third Host Material) In one aspect of the organic EL device of each embodiment, the third host material is a compound represented by the following general formula (2).

[0438] [ka]

[0439] (In the general formula (2), R 201 ~R 208 are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -N(R906 )(R 907 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 A group represented by -COOR 802 A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L 201 and L 202 are each independently Single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar 201 and Ar 202 are each independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0440] (In the third host material, R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901If there are multiple R 901 are the same or different from each other, R 902 If there are multiple R 902 are the same or different from each other, R 903 If there are multiple R 903 are the same or different from each other, R 904 If there are multiple R 904 are the same or different from each other, R 905 If there are multiple R 905 are the same or different from each other, R 906 If there are multiple R 906 are the same or different from each other, R 907 If there are multiple R 907 are the same or different from each other, R 801 If there are multiple R 801 are the same or different from each other, R 802 If there are multiple R 802 are either identical or different.)

[0441] In the third host material, R 201 ~R 208 are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -N(R 906 )(R 907 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 A group represented by -COOR 802 A group represented by Halogen atoms, a cyano group, or is a nitro group, L 201 and L 202 are each independently Single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar 201 and Ar 202 are each independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is preferably a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0442] In the third host material, L 201 and L 202 each independently represents a single bond or a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms; Ar 201 and Ar 202 are preferably each independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.

[0443] In the third host material, Ar 201 and Ar 202are preferably each independently a phenyl group, a naphthyl group, a phenanthryl group, a biphenyl group, a terphenyl group, a diphenylfluorenyl group, a dimethylfluorenyl group, a benzodiphenylfluorenyl group, a benzodimethylfluorenyl group, a dibenzofuranyl group, a dibenzothienyl group, a naphthobenzofuranyl group, or a naphthobenzothienyl group.

[0444] The third host material represented by the general formula (2) is preferably a compound represented by the following general formula (201), general formula (202), general formula (203), general formula (204), general formula (205), general formula (206), general formula (207), general formula (208) or general formula (209).

[0445] [ka]

[0446] [ka]

[0447] [ka]

[0448] [ka]

[0449] [ka]

[0450] [ka]

[0451] [ka]

[0452] [ka]

[0453] [ka]

[0454] (In the general formulas (201) to (209), L 201 and Ar 201 is L in the general formula (2). 201 and Ar 201 is synonymous with R 201 ~R 208 each independently represents R in the general formula (2) 201 ~R 208 is equivalent to

[0455] The third host material represented by the general formula (2) is also preferably a compound represented by the following general formula (221), general formula (222), general formula (223), general formula (224), general formula (225), general formula (226), general formula (227), general formula (228), or general formula (229).

[0456] [ka]

[0457] [ka]

[0458] [ka]

[0459] [ka]

[0460] [ka]

[0461] [ka]

[0462] [ka]

[0463] [ka]

[0464] [ka]

[0465] (In the general formula (221), the general formula (222), the general formula (223), the general formula (224), the general formula (225), the general formula (226), the general formula (227), the general formula (228) and the general formula (229), R 201 And R 203 ~R 208 each independently represents R in the general formula (2) 201 And R 203 ~R 208 is synonymous with L 201 and Ar 201 respectively represent L in the general formula (2). 201 and Ar 201 is synonymous with L 203 is L in the general formula (2). 201 is synonymous with L 203 and L 201 are identical or different from each other, Ar 203 represents Ar in the general formula (2). 201 is synonymous with Ar 203 and Ar201 are either identical or different.)

[0466] The third host material represented by the general formula (2) is also preferably a compound represented by the following general formula (241), general formula (242), general formula (243), general formula (244), general formula (245), general formula (246), general formula (247), general formula (248), or general formula (249).

[0467] [ka]

[0468] [ka]

[0469] [ka]

[0470] [ka]

[0471] [ka]

[0472] [ka]

[0473] [ka]

[0474] [ka]

[0475] [ka]

[0476] (In the general formula (241), the general formula (242), the general formula (243), the general formula (244), the general formula (245), the general formula (246), the general formula (247), the general formula (248) and the general formula (249), R 201 , R 202 And R 204 ~R 208 each independently represents R in the general formula (2) 201 , R 202 And R 204 ~R 208 is synonymous with L 201 and Ar 201 respectively represent L in the general formula (2). 201 and Ar 201 is synonymous with L 203 is L in the general formula (2). 201 is synonymous with L 203 and L 201 are identical or different from each other, Ar 203 represents Ar in the general formula (2). 201 is synonymous with Ar 203 and Ar 201 are either identical or different.)

[0477] In the third host material represented by the general formula (2), R 201 ~R 208 each independently represents 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 ring carbon atoms, or -Si(R 901 )(R 902 )(R 903 ) is preferably a group represented by the formula:

[0478] L 201 is a single bond or an unsubstituted arylene group having 6 to 22 ring carbon atoms, Ar201 is preferably a substituted or unsubstituted aryl group having 6 to 22 ring carbon atoms.

[0479] In the third host material represented by the general formula (2), R 201 ~R 208 each independently represents 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 ring carbon atoms, or -Si(R 901 )(R 902 )(R 903 ) is also preferred.

[0480] In the third host material represented by the general formula (2), R 201 ~R 208 is preferably a hydrogen atom.

[0481] In the third host material, any group described as "substituted or unsubstituted" is preferably an "unsubstituted" group.

[0482] (Third method for producing host material) The third host material can be produced by a known method. The third host material can also be produced by following a known method and using known alternative reactions and raw materials suited to the intended product.

[0483] (Example of the third host material) Specific examples of the third host material include the following compounds, however, the present invention is not limited to these specific examples of the third host material.

[0484] [ka]

[0485] [ka]

[0486]

change

[0487]

change

[0488]

change

[0489]

change

[0490]

change

[0491]

change

[0492]

change

[0493]

change

[0494]

change

[0495]

change

[0496]

change

[0497]

change

[0498]

change

[0499]

change

[0500]

change

[0501]

change

[0502]

change

[0503]

change

[0504]

change

[0505]

change

[0506]

change

[0507]

change

[0508] [ka]

[0509] [ka]

[0510] (Luminescent Compounds) In one aspect of the organic EL device of each embodiment, the luminescent compounds such as the first luminescent compound and the second luminescent compound are not particularly limited. In one aspect of the organic EL device of each embodiment, the luminescent compound does not include a metal complex. The luminescent compounds such as the first luminescent compound and the second luminescent compound are, for example, each independently one or more compounds selected from the group consisting of compounds represented by the following general formula (5) and compounds represented by the following general formula (6).

[0511] (Compound represented by general formula (5)) The compound represented by the general formula (5) will be described.

[0512] [ka]

[0513] (In the general formula (5), R 501 ~R 507 and R 511 ~R 517 Among the groups of two or more adjacent joined together to form a substituted or unsubstituted monocyclic ring, or combine with each other to form a substituted or unsubstituted fused ring, or Not bonded to each other, R does not form the monocyclic ring and does not form the condensed ring 501 ~R 507and R 511 ~R 517 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -N(R 906 )(R 907 ) a group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. R 521 and R 522 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -N(R 906 )(R 907 ) a group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0514] "R 501 ~R 507 and R 511 ~R 517 "A set of two or more adjacent pairs of R 501 and R 502 A set consisting of R 502 and R 503 A set consisting of R 503 and R 504 A set consisting of R 505 and R 506 A set consisting of R 506 and R 507 A set consisting of R 501 and R 502 and R 503 A combination of a set consisting of:

[0515] In one embodiment, R 501 ~R 507 and R 511 ~R 517 At least one, preferably two, of the formula (I) are -N(R 906 )(R 907 ) is a group represented by the formula:

[0516] In one embodiment, R 501 ~R 507 and R 511 ~R 517 are each independently Hydrogen atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0517] In one embodiment, the compound represented by the general formula (5) is a compound represented by the following general formula (52).

[0518] [ka]

[0519] (In the general formula (52), R 531 ~R 534 and R 541 ~R 544 At least one pair of adjacent pairs of joined together to form a substituted or unsubstituted monocyclic ring, or combine with each other to form a substituted or unsubstituted fused ring, or Not bonded to each other, R does not form the monocyclic ring and does not form the condensed ring 531 ~R 534 , R 541 ~R 544 , and R 551 and R 552 are each independently Hydrogen atom, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 561 ~R 564 are each independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0520] In one embodiment, the compound represented by the general formula (5) is a compound represented by the following general formula (53).

[0521] [ka]

[0522] (In the general formula (53), R 551 , R 552 and R 561 ~R 564each independently represents R in the general formula (52) 551 , R 552 and R 561 ~R 564 is equivalent to

[0523] In one embodiment, R in the general formula (52) and the general formula (53) 561 ~R 564 are each independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms (preferably a phenyl group).

[0524] In one embodiment, R in the general formula (5) 521 and R 522 R in the general formula (52) and the general formula (53) 551 and R 552 is a hydrogen atom.

[0525] In one embodiment, the substituent in the case of “substituted or unsubstituted” in the general formula (5), the general formula (52), and the general formula (53) is a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0526] (Specific examples of compounds represented by formula (5)) Specific examples of the compound represented by the general formula (5) include the compounds shown below.

[0527] [ka]

[0528]

change

[0529]

change

[0530]

change

[0531]

change

[0532]

change

[0533]

change

[0534]

change

[0535]

change

[0536]

change

[0537]

change

[0538]

change

[0539] [ka]

[0540] [ka]

[0541] [ka]

[0542] [ka]

[0543] [ka]

[0544] (Compound represented by general formula (6)) The compound represented by the general formula (6) will be described.

[0545] [ka]

[0546] (In the general formula (6), Ring a, ring b and ring c each independently represent a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 50 ring carbon atoms, or A substituted or unsubstituted heterocycle having 5 to 50 ring atoms, R 601 and R 602 each independently forms a substituted or unsubstituted heterocycle together with the ring a, ring b, or ring c, or does not form a substituted or unsubstituted heterocycle; R that does not form a substituted or unsubstituted heterocycle 601 and R 602are each independently a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0547] The rings a, b and c are rings (substituted or unsubstituted aromatic hydrocarbon rings having 6 to 50 ring carbon atoms, or substituted or unsubstituted heterocyclic rings having 5 to 50 ring atoms) fused to the central fused two-ring structure of the general formula (6) composed of a boron atom and two nitrogen atoms.

[0548] The "aromatic hydrocarbon rings" of ring a, ring b, and ring c have the same structure as the compounds in which a hydrogen atom has been introduced into the above-mentioned "aryl group". The "aromatic hydrocarbon ring" of ring a contains the three carbon atoms on the central fused two-ring structure of general formula (6) as ring-forming atoms. The "aromatic hydrocarbon ring" of ring b and ring c contains the two carbon atoms on the central fused two-ring structure of general formula (6) as ring-forming atoms.

[0549] Specific examples of the "substituted or unsubstituted aromatic hydrocarbon ring having 6 to 50 ring carbon atoms" include compounds in which a hydrogen atom has been introduced into the "aryl group" described in specific example group G1. The "heterocycles" of ring a, ring b and ring c have the same structure as the compounds in which a hydrogen atom has been introduced into the above-mentioned "heterocyclic group". The "heterocycle" of ring a contains three carbon atoms on the central fused bicyclic structure of general formula (6) as ring-forming atoms. The "heterocycle" of rings b and c contains two carbon atoms on the central fused bicyclic structure of general formula (6) as ring-forming atoms. Specific examples of the "substituted or unsubstituted heterocycle having 5 to 50 ring-forming atoms" include compounds in which a hydrogen atom has been introduced into the "heterocyclic group" described in specific example group G2.

[0550] R 601 and R 602 may each independently bond to ring a, ring b, or ring c to form a substituted or unsubstituted heterocycle. In this case, the heterocycle contains the nitrogen atom on the central fused two-ring structure of the general formula (6). In this case, the heterocycle may contain a heteroatom other than the nitrogen atom. R 601 and R 602 is bonded to the ring a, ring b, or ring c, specifically means that an atom constituting the ring a, ring b, or ring c is bonded to R 601 and R 602 It means that the atoms that make up R are bonded together. For example, R 601 is bonded to the a ring, R 601 A two-ring (or three-ring or more) nitrogen-containing heterocycle may be formed by condensing a ring containing the same with ring a. Specific examples of the nitrogen-containing heterocycle include compounds corresponding to the nitrogen-containing two-ring or more condensed heterocyclic groups in specific example group G2. R 601 When is bonded to ring b, R 602 When R is bonded to ring a, 602 The same applies when is bonded to ring c.

[0551] In one embodiment, the ring a, ring b, and ring c in the general formula (6) are each independently a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 50 ring carbon atoms. In one embodiment, the ring a, the ring b, and the ring c in the general formula (6) are each independently a substituted or unsubstituted benzene ring or naphthalene ring.

[0552] In one embodiment, R in the general formula (6) 601 and R 602 are each independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, A substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms is preferred.

[0553] In one embodiment, the compound represented by the general formula (6) is a compound represented by the following general formula (62).

[0554] [ka]

[0555] (In the general formula (62), R 601A is R 611 and R 621 or a substituted or unsubstituted heterocyclic ring is formed by bonding to one or more selected from the group consisting of R 602A is R 613 and R 614 or a substituted or unsubstituted heterocyclic ring is formed by bonding to one or more selected from the group consisting of R that does not form a substituted or unsubstituted heterocycle 601A and R 602A are each independently a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 611 ~R 621 At least one pair of adjacent pairs of joined together to form a substituted or unsubstituted monocyclic ring, or combine with each other to form a substituted or unsubstituted fused ring, or Not bonded to each other, R does not form the substituted or unsubstituted heterocycle, does not form the monocycle, and does not form the fused ring. 611 ~R 621 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -N(R 906 )(R 907 ) a group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0556] R in the general formula (62) 601A and R 602A are R in the general formula (6), 601 and R 602 is a group corresponding to For example, R 601A and R 611 may be bonded to form a two-ring (or three-ring or more) nitrogen-containing heterocycle in which a ring containing the ring is condensed with a benzene ring corresponding to the ring a. Specific examples of the nitrogen-containing heterocycle include compounds corresponding to the nitrogen-containing two-ring or more condensed heterocyclic groups in the specific example group G2. R 601A and R 621 If R is bonded, 602A and R 613 When R is bonded, 602A and R614 The same applies when is combined.

[0557] R 611 ~R 621 At least one pair of adjacent pairs of joined together to form a substituted or unsubstituted monocyclic ring, or They may be bonded to each other to form a substituted or unsubstituted fused ring. For example, R 611 and R 612 may be bonded to the 6-membered ring to form a structure in which a benzene ring, an indole ring, a pyrrole ring, a benzofuran ring, a benzothiophene ring, or the like is condensed with the 6-membered ring to which they are bonded, and the condensed ring formed is a naphthalene ring, a carbazole ring, an indole ring, a dibenzofuran ring, or a dibenzothiophene ring.

[0558] In one embodiment, R 611 ~R 621 are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0559] In one embodiment, R 611 ~R 621 are each independently Hydrogen atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0560] In one embodiment, R 611 ~R 621 are each independently A hydrogen atom, or It is a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms.

[0561] In one embodiment, R 611 ~R 621 are each independently A hydrogen atom, or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; R 611 ~R 621 At least one of them is a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms.

[0562] In one embodiment, the compound represented by the general formula (62) is a compound represented by the following general formula (63).

[0563] [ka]

[0564] (In the general formula (63), R 631 is R 646 or not forming a substituted or unsubstituted heterocycle, R 633 is R 647 or not forming a substituted or unsubstituted heterocycle, R 634 is R 651 or not forming a substituted or unsubstituted heterocycle, R 641 is R 642 or not forming a substituted or unsubstituted heterocycle, R 631 ~R 651 At least one pair of adjacent pairs of joined together to form a substituted or unsubstituted monocyclic ring, or combine with each other to form a substituted or unsubstituted fused ring, or Not bonded to each other, R does not form the substituted or unsubstituted heterocycle, does not form the monocycle, and does not form the fused ring. 631 ~R 651 are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -N(R 906 )(R 907 ) a group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0565] R 631 is R 646 may combine with R to form a substituted or unsubstituted heterocycle. For example, R 631 and R 646 Combined, R 646 may be bonded to a benzene ring, a ring containing N, and a benzene ring corresponding to ring a to form a nitrogen-containing heterocyclic ring having three or more condensed rings. Specific examples of the nitrogen-containing heterocyclic ring include compounds corresponding to the nitrogen-containing heterocyclic ring group having three or more condensed rings in the specific example group G2. 633 and R 647 If R is bonded, 634 and R 651 When R is bonded, 641 and R 642 The same applies when is combined.

[0566] In one embodiment, R 631 ~R 651 are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0567] In one embodiment, R 631 ~R 651 are each independently Hydrogen atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0568] In one embodiment, R 631 ~R 651 are each independently A hydrogen atom, or It is a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms.

[0569] In one embodiment, R 631 ~R 651 are each independently A hydrogen atom, or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; R 631 ~R 651 At least one of them is a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms.

[0570] In one embodiment, the compound represented by the general formula (63) is a compound represented by the following general formula (63A):

[0571] [ka]

[0572] (In the general formula (63A), R 661 teeth, Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, R 662 ~R 665 are each independently a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, or It is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.

[0573] In one embodiment, R 661 ~R 665 are each independently a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or It is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.

[0574] In one embodiment, R 661 ~R 665 are each independently a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms.

[0575] In one embodiment, the compound represented by the general formula (63) is a compound represented by the following general formula (63B):

[0576] [ka]

[0577] (In the general formula (63B), R 671 and R 672 are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -N(R 906 )(R 907 ) a group represented by a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, R 673 ~R 675 are each independently a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -N(R 906 )(R 907 ) a group represented by It is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.

[0578] In one embodiment, the compound represented by the general formula (63) is a compound represented by the following general formula (63B').

[0579] [ka]

[0580] (In the general formula (63B′), R 672 ~R 675each independently represents R in the general formula (63B) 672 ~R 675 is equivalent to

[0581] In one embodiment, R 671 ~R 675 At least one of the a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -N(R 906 )(R 907 ) a group represented by It is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.

[0582] In one embodiment, R 672 teeth, Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; -N(R 906 )(R 907 ) a group represented by a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, R 671 and R 673 ~R 675 are each independently a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; -N(R 906 )(R 907 ) a group represented by It is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.

[0583] In one embodiment, the compound represented by the general formula (63) is a compound represented by the following general formula (63C):

[0584] [ka]

[0585] (In the general formula (63C), R 681 and R 682 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, or It is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms. R 683 ~R 686 are each independently a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, or It is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.

[0586] In one embodiment, the compound represented by the general formula (63) is a compound represented by the following general formula (63C'):

[0587] [ka]

[0588] (In the general formula (63C'), R 683 ~R 686 each independently represents R in the general formula (63C) 683 ~R 686 is equivalent to

[0589] In one embodiment, R 681 ~R686 are each independently a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or It is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.

[0590] In one embodiment, R 681 ~R 686 each independently represents a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.

[0591] The compound represented by the general formula (6) is first prepared by connecting the ring a, the ring b and the ring c to a linking group (NR 601 Groups containing NR 602 An intermediate can be produced by linking the a, b and c rings with a linking group (a group containing a boron atom) (reaction 2). In reaction 1, an amination reaction such as the Bachbrut-Hartwig reaction can be applied. In reaction 2, a tandem hetero Friedel-Crafts reaction can be applied.

[0592] (Specific examples of compounds represented by formula (6)) Specific examples of the compound represented by the general formula (6) are given below, but these are merely illustrative, and the compound represented by the general formula (6) is not limited to the following specific examples.

[0593] [ka]

[0594] [ka]

[0595] [ka]

[0596] [ka]

[0597] [ka]

[0598] [ka]

[0599] [ka]

[0600] [ka]

[0601] [ka]

[0602] [ka]

[0603] [ka]

[0604] [ka]

[0605] In one aspect of the organic EL device of each embodiment, the triplet energy T 1 (D1) satisfies the relationship of the following formula (Mathematical formula 15). 2.6eV>T 1 (D1)>T 1 (H1)>T 1 (H3) …(Number 15)

[0606] In one aspect of the organic EL device of each embodiment, the triplet energy T 1 (D1) satisfies the relationship of the following formula (Equation 16). 2.6eV>T 1 (D1)>T 1 (H2)>T 1 (H3) …(Number 16)

[0607] In one aspect of the organic EL device of each embodiment, the triplet energy T 1 (D2) satisfies the relationship of the following formula (Equation 17). 2.6eV>T 1 (D2)>T 1 (H1)>T 1 (H3) …(Number 17)

[0608] In one aspect of the organic EL device of each embodiment, the triplet energy T 1 (D2) satisfies the relationship of the following formula (Equation 18). 2.6eV>T 1 (D2)>T 1 (H2)>T 1 (H3) …(Number 18)

[0609] In one aspect of the organic EL device of each embodiment, the triplet energy T 1 (D1) satisfies the relationship of the following equation (Equation 19). 0 eV <T 1 (D1)-T 1 (H1)<0.6 eV …(Equation 19)

[0610] In one aspect of the organic EL device of each embodiment, the triplet energy T 1 (D1) satisfies the relationship of the following formula (Equation 25). 0 eV <T 1 (D1)-T 1 (H2)<0.6 eV …(Number 25)

[0611] In one aspect of the organic EL device of each embodiment, the triplet energy T1 (D2) satisfies the relationship of the following equation (Equation 26). 0 eV <T 1 (D2)-T 1 (H3)<0.8eV …(Number 26)

[0612] In one aspect of the organic EL device of each embodiment, the triplet energy T 1 (H1) satisfies the relationship of the following formula (Equation 27). T 1 (H1)>2.0 eV …(Number 27)

[0613] In one aspect of the organic EL device of each embodiment, the triplet energy T 1 (H1) satisfies the relationship of the following formula (Mathematical Formula 27A) or (Mathematical Formula 27B). T 1 (H1)>2.10eV …(number 27A) T 1 (H1)>2.15eV …(Number 27B)

[0614] In one aspect of the organic EL device of each embodiment, the triplet energy T 1 When (H1) satisfies the relationship of the above-mentioned formula (27A) or (27B), triplet excitons generated in the first emitting layer are easily transferred to the second emitting layer, and reverse transfer from the second emitting layer to the first emitting layer is easily suppressed. As a result, singlet excitons are efficiently generated in the second emitting layer, and luminous efficiency is improved.

[0615] In one aspect of the organic EL device of each embodiment, the triplet energy T 1 (H1) satisfies the relationship of the following formula (27C) or (27D). 2.08eV>T 1 (H1)>1.87eV …(number 27C) 2.05eV>T 1 (H1)>1.90eV …(number 27D)

[0616] The triplet energy T of the first host material1 When (H1) satisfies the relationship of the above-mentioned formula (Formula 27C) or (Formula 27D), the energy of triplet excitons generated in the first emitting layer becomes small, and an increase in the lifetime of the organic EL element can be expected.

[0617] In one aspect of the organic EL device of each embodiment, the triplet energy T 1 (D1) satisfies the relationship of the following formula (Mathematical Formula 28A) or (Mathematical Formula 28B). 2.60eV>T 1 (D1) ...(Number 28A) 2.50eV>T 1 (D1) ...(Math 28B) When the first light-emitting layer contains a compound that satisfies the relationship of the above formula (Formula 28A) or (Formula 28B), the life of the organic EL element is extended.

[0618] In one aspect of the organic EL device of each embodiment, the triplet energy T 1 (D2) satisfies the relationship of the following formula (28C) or (28D). 2.60eV>T 1 (D2) …(Number 28C) 2.50eV>T 1 (D2) ...(Number 28D) When the second light-emitting layer contains a compound that satisfies the relationship of the above-mentioned formula (Formula 28C) or (Formula 28D), the life of the organic EL element is extended.

[0619] In one aspect of the organic EL element of each embodiment, the first light-emitting layer and the second light-emitting layer are in direct contact with each other.

[0620] In this specification, the layer structure in which "the first emitting layer and the second emitting layer are in direct contact with each other" can include, for example, any of the following embodiments (LS1), (LS2), and (LS3). (LS1) An embodiment in which a region in which the first host material, the second host material, and the third host material are mixed is generated during the process of vapor-depositing the compound for the first emitting layer and the process of vapor-depositing the compound for the second emitting layer, and this region is present at the interface between the first emitting layer and the second emitting layer. (LS2) When the first emitting layer and the second emitting layer contain a light-emitting compound, a region in which the first host material, the second host material, the third host material, and the light-emitting compound are mixed is generated during the process of vapor-depositing the compound for the first emitting layer and the process of vapor-depositing the compound for the second emitting layer, and this region is present at the interface between the first emitting layer and the second emitting layer. (LS3) When the first emitting layer and the second emitting layer contain a light-emitting compound, a region made of the light-emitting compound, a region made of the first host material, or a region made of the second host material and a third host material is generated during the process of vapor-deposition of the compound for the first emitting layer and the process of vapor-deposition of the compound for the second emitting layer, and the region is present at the interface between the first emitting layer and the second emitting layer.

[0621] In one aspect of the organic EL device of each embodiment, the first light-emitting layer and the second light-emitting layer are not in direct contact with each other, and an organic layer is included between the first light-emitting layer and the second light-emitting layer.

[0622] (intervening layer) The organic EL element of each embodiment may also have an intervening layer as an organic layer disposed between the first light-emitting layer and the second light-emitting layer, i.e., the light-emitting region of the organic EL element of each embodiment may also have the first light-emitting layer, the second light-emitting layer, and the intervening layer. In the organic EL device of each embodiment, in order to prevent the Singlet light-emitting region and the TTF light-emitting region from overlapping, the intervening layer does not contain a light-emitting compound to the extent that this can be realized. For example, the content of the luminescent compound in the intervening layer is not limited to 0% by mass, and in cases where the luminescent compound is, for example, a component unintentionally mixed in during the manufacturing process or a component contained as an impurity in the raw materials, the intervening layer is allowed to contain these components. For example, if all of the materials constituting the intermediate layer are material A, material B, and material C, the content of each of material A, material B, and material C in the intermediate layer is 10 mass% or more, and the total content of material A, material B, and material C is 100 mass%. Hereinafter, the intervening layer may be referred to as a "non-doped layer," and the layer containing a light-emitting compound may be referred to as a "doped layer."

[0623] In general, when the light-emitting layer has a laminated structure, it is believed that the light-emitting efficiency can be improved because the Singlet light-emitting region and the TTF light-emitting region are easily separated. In the organic EL device of each embodiment, when an intermediate layer (non-doped layer) is disposed between the first and second light-emitting layers in the light-emitting region, the overlapping area between the singlet light-emitting region and the TTF light-emitting region is reduced, and it is expected that the decrease in TTF efficiency caused by collisions between triplet excitons and carriers is suppressed. In other words, it is considered that the insertion of the intermediate layer (non-doped layer) between the light-emitting layers contributes to improving the efficiency of TTF emission.

[0624] The intermediate layer is a non-doped layer. The intervening layer does not contain a metal atom, and therefore does not contain a metal complex. The intervening layer includes an intervening layer material that is not a light-emitting compound. The material for the intervening layer is not particularly limited as long as it is a material other than a light-emitting compound. Examples of the intervening layer material include 1) heterocyclic compounds such as oxadiazole derivatives, benzimidazole derivatives, and phenanthroline derivatives; 2) condensed aromatic compounds such as carbazole derivatives, anthracene derivatives, phenanthrene derivatives, pyrene derivatives, and chrysene derivatives; and 3) aromatic amine compounds such as triarylamine derivatives and condensed polycyclic aromatic amine derivatives.

[0625] The intervening layer material can be at least any one of the first host material, the second host material, and the third host material, but is not particularly limited as long as it separates the Singlet emission region and the TTF emission region and does not inhibit the Singlet emission and the TTF emission.

[0626] In the organic EL device of each embodiment, the content of each of the materials constituting the intervening layer in the intervening layer is 10% by mass or more. The intermediate layer contains the intermediate layer material as a material constituting the intermediate layer. The intervening layer preferably contains the intervening layer material in an amount of 60 mass% or more of the total mass of the intervening layer, more preferably 70 mass% or more of the total mass of the intervening layer, even more preferably 80 mass% or more of the total mass of the intervening layer, even more preferably 90 mass% or more of the total mass of the intervening layer, and even more preferably 95 mass% or more of the total mass of the intervening layer. The intervening layer may contain only one type of intervening layer material, or may contain two or more types of intervening layer materials. When the intervening layer contains two or more types of intervening layer materials, the upper limit of the total content of the two or more intervening layer materials is 100 mass %. In the organic EL element of each embodiment, the intervening layer may contain a material other than the intervening layer material.

[0627] The intervening layer may be composed of a single layer, or may be composed of two or more laminated layers.

[0628] The thickness of the intermediate layer is not particularly limited as long as it can prevent the Singlet emission region and the TTF emission region from overlapping, but is preferably 3 nm to 15 nm, and more preferably 5 nm to 10 nm, per layer. If the thickness of the intermediate layer is 3 nm or more, the Singlet emission region and the emission region derived from TTF can be easily separated. If the thickness of the intermediate layer is 15 nm or less, it becomes easier to suppress the phenomenon in which the host material of the intermediate layer emits light.

[0629] The intervening layer includes an intervening layer material as a material constituting the intervening layer, and has a triplet energy T 1 (H1) and the triplet energy T of the second host material 1 (H2) and the triplet energy T of at least one intervening layer material 1 (M mid ) preferably satisfies the relationship of the following formula (Formula C21). T 1 (H1) ≧ T 1 (M mid )≧T 1 (H2) ...(Math C21)

[0630] The intervening layer includes an intervening layer material as a material constituting the intervening layer, and has a triplet energy T 1 (H1) and the triplet energy T of the third host material 1 (H3) and the triplet energy T of at least one intervening layer material 1 (M mid ) preferably satisfies the relationship of the following formula (Formula C22). T 1 (H1) ≧ T 1 (M mid )≧T 1 (H3) …(Number C22)

[0631] When the intermediate layer contains two or more intermediate layer materials as materials constituting the intermediate layer, the triplet energy T 1 (H1) and the triplet energy T of the second host material 1 (H2) and the triplet energy T of each interlayer material 1 (M EA ) more preferably satisfy the relationship of the following formula (Formula C23). T 1 (H1) ≧ T 1 (M EA )≧T 1 (H2) ...(Number C23)

[0632] When the intermediate layer contains two or more intermediate layer materials as materials constituting the intermediate layer, the triplet energy T 1 (H1) and the triplet energy T of the third host material 1 (H3) and the triplet energy T of each interlayer material 1 (M EA ) more preferably satisfy the relationship of the following formula (Formula C24). T 1 (H1) ≧ T 1 (M EA )≧T 1 (H3) ...(Number C24)

[0633] (First ingredient) In the organic EL element of each embodiment, the first material is not particularly limited as long as it satisfies the relationship of the above mathematical formula (Math A1). In one aspect of the organic EL element of each embodiment, the energy level HOMO (HT1) of the highest occupied molecular orbital of the first material satisfies the relationship of the following mathematical formula (Math B1) or (Math B2). HOMO(HT1)>-5.50eV …(Math B1) HOMO(HT1)>-5.45eV …(Math B2)

[0634] In one aspect of the organic EL device of each embodiment, the first material is an amine compound having a substituted amino group. In one aspect of the organic EL device of each embodiment, the first material is -N(R B1 )(R B2 ), and R B1 and R B2 are each independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0635] (Other layers of organic electroluminescence devices) The organic EL device of each embodiment may have one or more organic layers in addition to the light-emitting layer described in each embodiment. The organic layer may be, for example, at least one layer selected from the group consisting of a hole injection layer, a hole transport layer, a light-emitting layer, an electron injection layer, an electron transport layer, a hole blocking layer, and an electron blocking layer.

[0636] The organic layer of the organic EL element of each embodiment may be composed of only the light-emitting layer described in each embodiment. However, the organic EL element of each embodiment may further have, as the organic layer, at least any layer selected from the group consisting of a hole injection layer, a hole transport layer, an electron injection layer, an electron transport layer, a hole blocking layer, an electron blocking layer, and the like.

[0637] FIG. 1 shows a schematic configuration of an example of an organic EL element according to the first embodiment. The organic EL element 1 includes a light-transmitting substrate 2, an anode 3, a cathode 4, and an organic layer 10 disposed between the anode 3 and the cathode 4. The organic layer 10 includes, in order from the anode 3 side, a first hole transporting region 6, a first light-emitting region 5, and a first electron transporting region 7. The first hole transporting region 6 includes, in order from the anode 3 side, a third anode-side organic layer 63, a second anode-side organic layer 62, and a first anode-side organic layer 61. The first light-emitting region 5 includes, in order from the anode 3 side, a first light-emitting layer 51 and a second light-emitting layer 52. The first electron transporting region 7 includes, in order from the first light-emitting region 5 side, an electron transporting layer 71 and an electron injection layer 72.

[0638] FIG. 2 shows a schematic configuration of one example of the organic EL device according to the second, third and fifth embodiments. 2 differs from the organic EL element 1 in that an organic layer 10A includes a first light-emitting region 5A, but is otherwise similar to the organic EL element 1. The first light-emitting region 5A includes a first light-emitting layer 51 as one light-emitting layer.

[0639] In one aspect of the organic EL device of each embodiment, the third anode-side organic layer is a hole injection layer. In one aspect of the organic EL device of each embodiment, the second anode-side organic layer is a hole transport layer. In one aspect of the organic EL device of each embodiment, the first anode-side organic layer is an electron blocking layer.

[0640] The present invention is not limited to the configuration of the organic EL element shown in FIGS.

[0641] The configuration of the organic EL device of each embodiment will be further described below. In the following, the reference numerals may be omitted.

[0642] (substrate) The substrate is used as a support for the organic EL element. For example, glass, quartz, plastic, etc. can be used as the substrate. A flexible substrate may also be used. A flexible substrate is a substrate that can be bent (flexible), and examples thereof include a plastic substrate. Examples of materials for forming the plastic substrate include polycarbonate, polyarylate, polyethersulfone, polypropylene, polyester, polyvinyl fluoride, polyvinyl chloride, polyimide, and polyethylene naphthalate. An inorganic deposition film can also be used.

[0643] (anode) For the anode formed on the substrate, it is preferable to use a metal, alloy, electrically conductive compound, or a mixture thereof having a large work function (specifically, 4.0 eV or more). Specific examples include indium oxide-tin oxide (ITO), indium oxide-tin oxide containing silicon or silicon oxide, indium oxide-zinc oxide, tungsten oxide, indium oxide containing zinc oxide, graphene, etc. 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 metal materials (e.g., titanium nitride), etc.

[0644] These materials are usually formed into a film by a sputtering method. For example, indium oxide-zinc oxide can be formed by a sputtering method by using a target in which zinc oxide is added to indium oxide at 1 mass % or more and 10 mass % or less. In addition, indium oxide containing tungsten oxide and zinc oxide can be formed by a sputtering method by using a target in which tungsten oxide is added to indium oxide at 0.5 mass % or more and 5 mass % or less and zinc oxide is added to indium oxide at 0.1 mass % or more and 1 mass % or less. In addition, it may be formed by a vacuum deposition method, a coating method, an inkjet method, a spin coating method, or the like.

[0645] Of the EL layers formed on the anode, the hole injection layer formed in contact with the anode is formed using a composite material that easily injects holes regardless of the work function of the anode, so that materials that can be used as electrode materials (for example, metals, alloys, electrically conductive compounds, and mixtures of these, as well as other elements belonging to Group 1 or Group 2 of the periodic table) can be used.

[0646] Materials with small work functions, such as elements belonging to Group 1 or 2 of the periodic table, i.e., alkali metals such as lithium (Li) and cesium (Cs), alkaline earth metals such as magnesium (Mg), calcium (Ca), and strontium (Sr), and alloys containing these (e.g., MgAg, AlLi), rare earth metals such as europium (Eu), ytterbium (Yb), and alloys containing these, can also be used. When alkali metals, alkaline earth metals, and alloys containing these are used to form the anode, vacuum deposition and sputtering methods can be used. Furthermore, when silver paste or the like is used, coating and inkjet methods can be used.

[0647] (cathode) For the cathode, it is preferable to use a metal, alloy, electrically conductive compound, or a mixture thereof, each having a small work function (specifically, 3.8 eV or less). Specific examples of such a cathode material include elements belonging to Group 1 or 2 of the periodic table, i.e., alkali metals such as lithium (Li) and cesium (Cs), alkaline earth metals such as magnesium (Mg), calcium (Ca), and strontium (Sr), and alloys containing these (e.g., MgAg, AlLi), rare earth metals such as europium (Eu), ytterbium (Yb), and alloys containing these.

[0648] When an alkali metal, an alkaline earth metal, or an alloy containing these is used to form a cathode, a vacuum deposition method or a sputtering method can be used. When a silver paste or the like is used, a coating method or an inkjet method can be used.

[0649] By providing an electron injection layer, the cathode can be formed using various conductive materials, such as Al, Ag, ITO, graphene, indium oxide-tin oxide containing silicon or silicon oxide, regardless of the magnitude of the work function. These conductive materials can be formed into films by a sputtering method, an inkjet method, a spin coating method, or the like.

[0650] (Hole injection layer) The hole injection layer is a layer containing a substance with high hole injection properties, such as molybdenum oxide, titanium oxide, vanadium oxide, rhenium oxide, ruthenium oxide, chromium oxide, zirconium oxide, hafnium oxide, tantalum oxide, silver oxide, tungsten oxide, manganese oxide, etc.

[0651] In addition, examples of materials with high hole injection properties include low-molecular-weight organic compounds such as 4,4',4''-tris(N,N-diphenylamino)triphenylamine (abbreviation: TDATA), 4,4',4''-tris[N-(3-methylphenyl)-N-phenylamino]triphenylamine (abbreviation: MTDATA), 4,4'-bis[N-(4-diphenylaminophenyl)-N-phenylamino]biphenyl (abbreviation: DPAB), 4,4'-bis(N-{4-[N'-(3-methylphenyl)-N'-phenylamino]phenyl}-N-phenylamino)biphenyl (abbreviation: DNTPD), and 1,3,5-tris[N-(4-diphenylaminophenyl)-N-phenylamino]biphenyl (abbreviation: DNTPD). [N-phenylamino]benzene (abbreviation: DPA3B), 3-[N-(9-phenylcarbazol-3-yl)-N-phenylamino]-9-phenylcarbazole (abbreviation: PCzPCA1), 3,6-bis[N-(9-phenylcarbazol-3-yl)-N-phenylamino]-9-phenylcarbazole (abbreviation: PCzPCA2), 3-[N-(1-naphthyl)-N-(9-phenylcarbazol-3-yl)amino]-9-phenylcarbazole (abbreviation: PCzPCN1), and other aromatic amine compounds, as well as dipyrazino[2,3-f:20,30-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (HAT-CN) are also included.

[0652] In addition, as a substance with high hole injection properties, a polymer compound (oligomer, dendrimer, polymer, etc.) can be used. For example, polymer compounds such as poly(N-vinylcarbazole) (abbreviation: PVK), poly(4-vinyltriphenylamine) (abbreviation: PVTPA), poly[N-(4-{N'-[4-(4-diphenylamino)phenyl]phenyl-N'-phenylamino}phenyl)methacrylamide] (abbreviation: PTPDMA), poly[N,N'-bis(4-butylphenyl)-N,N'-bis(phenyl)benzidine] (abbreviation: Poly-TPD) can be used. In addition, a polymer compound to which an acid is added, such as poly(3,4-ethylenedioxythiophene) / poly(styrenesulfonic acid) (PEDOT / PSS) or polyaniline / poly(styrenesulfonic acid) (PAni / PSS) can be used.

[0653] (Hole transport layer) In one aspect of the organic EL device of each embodiment, a hole transport layer is disposed between the anode and the light-emitting region.

[0654] The hole transport layer is a layer containing a substance with high hole transport properties. For the hole transport layer, an aromatic amine compound, a carbazole derivative, an anthracene derivative, or the like can be used. Specifically, 4,4'-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (abbreviation: NPB), N,N'-bis(3-methylphenyl)-N,N'-diphenyl-[1,1'-biphenyl]-4,4'-diamine (abbreviation: TPD), 4-phenyl-4'-(9-phenylfluoren-9-yl)triphenylamine (abbreviation: BAFLP), 4,4'-bis[N-(9,9-dimethylfluoren-2-yl)-N-phenylamino]biphenyl (abbreviation: NPB), Examples of aromatic amine compounds that can be used include 4,4',4''-tris(N,N-diphenylamino)triphenylamine (abbreviation: TDATA), 4,4',4''-tris[N-(3-methylphenyl)-N-phenylamino]triphenylamine (abbreviation: MTDATA), and 4,4'-bis[N-(spiro-9,9'-bifluoren-2-yl)-N-phenylamino]biphenyl (abbreviation: BSPB). The substances mentioned here are mainly 10 -6 cm 2 / (V s) or higher.

[0655] The hole transport layer may be made of carbazole derivatives such as CBP, 9-[4-(N-carbazolyl)]phenyl-10-phenylanthracene (CzPA), and 9-phenyl-3-[4-(10-phenyl-9-anthryl)phenyl]-9H-carbazole (PCzPA), or anthracene derivatives such as t-BuDNA, DNA, and DPAnth. Polymer compounds such as poly(N-vinylcarbazole) (abbreviation: PVK) and poly(4-vinyltriphenylamine) (abbreviation: PVTPA) may also be used.

[0656] However, other substances may be used as long as they have a higher hole transporting property than an electron transporting property. Note that the layer containing the substance having a high hole transporting property may be a single layer or a stack of two or more layers made of the above substances.

[0657] (electron transport layer) In one aspect of the organic EL device of each embodiment, an electron transport layer is disposed between the light-emitting region and the cathode.

[0658] The electron transport layer is a layer containing a substance with high electron transport properties. For the electron transport layer, 1) metal complexes such as aluminum complexes, beryllium complexes, and zinc complexes, 2) heteroaromatic compounds such as imidazole derivatives, benzimidazole derivatives, azine derivatives, carbazole derivatives, and phenanthroline derivatives, and 3) polymer compounds can be used. Specifically, low-molecular organic compounds include Alq, tris(4-methyl-8-quinolinolato)aluminum (abbreviated as Almq), 3 ), Bis(10-hydroxybenzo[h]quinolinato)beryllium (abbreviation: BeBq 2Metal complexes such as BAlq, Znq, ZnPBO, and ZnBTZ can be used. In addition to metal complexes, 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (abbreviation: PBD), 1,3-bis[5-(pt-butylphenyl)-1,3,4-oxadiazol-2-yl]benzene (abbreviation: OXD-7), 3-(4-tert-butylphenyl)-4-phenyl-5-(4-biphenylyl)-1,2,4-triazole (abbreviation: Heteroaromatic compounds such as 3-(4-tert-butylphenyl)-4-(4-ethylphenyl)-5-(4-biphenylyl)-1,2,4-triazole (abbreviation: p-EtTAZ), bathophenanthroline (abbreviation: BPhen), bathocuproine (abbreviation: BCP), and 4,4'-bis(5-methylbenzoxazol-2-yl)stilbene (abbreviation: BzOs) can also be used. Azine derivatives include pyridine derivatives, pyrimidine derivatives, and triazine derivatives. In this embodiment, azine derivatives or benzimidazole compounds can be preferably used. The substances mentioned here are mainly 10 -6 cm 2 / (V·s) or more. Note that any other substance may be used as the electron transport layer as long as it has a higher electron transporting property than a hole transporting property. The electron transport layer may be formed of a single layer or may be formed of two or more layers of the above substances.

[0659] The electron transport layer can also be made of a polymer compound, such as poly[(9,9-dihexylfluorene-2,7-diyl)-co-(pyridine-3,5-diyl)] (abbreviation: PF-Py) or poly[(9,9-dioctylfluorene-2,7-diyl)-co-(2,2'-bipyridine-6,6'-diyl)] (abbreviation: PF-BPy).

[0660] (electron injection layer) The electron injection layer is a layer containing a substance with high electron injection properties. Examples of the electron injection layer include lithium (Li), cesium (Cs), calcium (Ca), lithium fluoride (LiF), cesium fluoride (CsF), and calcium fluoride (CaF 2 Alkaline metals, alkaline earth metals, such as lithium oxide (LiOx), or compounds thereof can be used. In addition, a substance having electron transport properties containing an alkali metal, an alkaline earth metal, or a compound thereof, specifically, a substance containing magnesium (Mg) in Alq, etc. can be used. In this case, electron injection from the cathode can be performed more efficiently.

[0661] Alternatively, a composite material obtained by mixing an organic compound and an electron donor (donor) may be used for the electron injection layer. Such a composite material has excellent electron injection and electron transport properties because electrons are generated in the organic compound by the electron donor. In this case, the organic compound is preferably a material that is excellent in transporting the generated electrons, and specifically, for example, the above-mentioned substances constituting the electron transport layer (metal complexes, heteroaromatic compounds, etc.) can be used. The electron donor may be any substance that exhibits electron donating properties to the organic compound. Specifically, alkali metals, alkaline earth metals, and rare earth metals are preferred, and examples thereof include lithium, cesium, magnesium, calcium, erbium, and ytterbium. Furthermore, alkali metal oxides and alkaline earth metal oxides are preferred, and examples thereof include lithium oxide, calcium oxide, and barium oxide. Furthermore, a Lewis base such as magnesium oxide can also be used. Furthermore, an organic compound such as tetrathiafulvalene (abbreviation: TTF) can also be used.

[0662] (Layer formation method) The method for forming each layer of the organic EL element of each embodiment is not limited to those specifically mentioned above, but may be any known method, such as a dry film formation method, such as a vacuum deposition method, a sputtering method, a plasma method, or an ion plating method, or a wet film formation method, such as a spin coating method, a dipping method, a flow coating method, or an inkjet method.

[0663] In the organic EL device of each embodiment, the first light-emitting layer containing the first host material, the second host material, and the first light-emitting compound, and the second light-emitting layer containing the third host material and the second light-emitting compound can be formed by, for example, a co-evaporation method using a mixture of a plurality of types of compounds, a deposition method using a mixture of a plurality of types of compounds premixed, or a coating method using a mixture of a plurality of types of compounds premixed. The mixture of a plurality of types of compounds premixed may be a mixed powder. The mixture of a plurality of types of compounds premixed may be a solution. The mixture used to form the light-emitting layer may be, for example, the composition described in the third embodiment or the fourth embodiment. The method of premixing a plurality of types of compounds may be referred to as premixing. The method of premixing is not particularly limited, but for example, the deposition ratio of the compounds constituting the premixed mixture can be adjusted by adjusting the molecular weight of the compounds by adjusting the substituents of the compounds constituting the mixture, or by adjusting the mixing ratio.

[0664] (Film thickness) The thickness of each organic layer of the organic EL element of each embodiment is not limited unless otherwise specified above. In general, if the thickness is too thin, defects such as pinholes are likely to occur, and if the thickness is too thick, a high applied voltage is required, resulting in poor efficiency. Therefore, the thickness of each organic layer of the organic EL element is usually preferably in the range of several nm to 1 μm.

[0665] (Form of composition) The form of the composition in each embodiment is not particularly limited, and examples thereof include solid, powder, solution, and film. When the composition is in the form of a solid, the composition may be formed into a pellet shape. The composition of the present embodiment may be used as a mixture that is mixed in advance (premixed mixture). The premixed mixture may be used to form a film. The above-mentioned "film" in the form of a composition includes a film formed by containing a raw material containing the first compound and the second compound. An example of such a film is the first light-emitting layer in the first embodiment, which contains the first host material and the second host material.

[0666] (mixed powder) In one aspect of the composition of each embodiment, the form of the composition is a mixed powder. The composition according to the third embodiment may be a mixed powder. The composition according to the fourth embodiment may be a mixed powder.

[0667] The mixed powder according to one embodiment contains a first compound and a second compound, the first compound and the second compound being different from each other, and the first compound and the second compound each independently contain at least one of the structures satisfying the condition (i) and the condition (ii) in the third embodiment in the molecule.

[0668] The mixed powder according to one embodiment contains a first compound and a second compound, the first compound and the second compound are different from each other, the highest occupied molecular orbital (HOMO(C1)) of the first compound and the highest occupied molecular orbital (HOMO(C2)) of the second compound satisfy the relationship of the formula (A7) in the fourth embodiment, and the triplet energy T 1 (C1) satisfies the relationship of the above formula (Math. A8), and the triplet energy T 1 (C2) satisfies the relationship of the above formula (Math. A9).

[0669] The mixed powder according to the embodiment can be used in an organic EL device. By using the mixed powder according to the embodiment in an organic EL device, the performance of the device can be improved. The mixed powder according to the embodiment can also be used to form a light-emitting layer of an organic EL element. By forming a light-emitting layer of an organic EL element using the mixed powder according to the embodiment, it is possible to provide an organic EL element that can maintain light-emitting efficiency and extend the life.

[0670] (Ratio of compounds in the composition) In one aspect of the composition of each embodiment, the mass M of the first compound in the composition C1 and the mass M of the second compound C2 Total of M C1 +M C2 Mass M of the second compound C2 The mass percentage of is 0.5 mass % or more and 60 mass % or less.

[0671] In one aspect of the composition of each embodiment, the total M C1 +M C2 Mass M of the second compound C2 is 2 mass % or more, 10 mass % or more, 25 mass % or more, or 40 mass % or more. In one aspect of the composition of each embodiment, the total M C1 +M C2 Mass M of the second compound C2 The mass percentage of is 55 mass % or less.

[0672] <Measurement method> (Highest Occupied Orbital (HOMO)) The value of the energy level of the highest occupied molecular orbital (HOMO) of the measurement object (compound or material) is calculated by the following formula (F3): The unit of the energy level of the highest occupied molecular orbital (HOMO) is eV. HOMO=-1.4×(Eox-Efc)-4.6eV …(F3) In formula (F3), Eox and Efc are as follows. Eox: First oxidation potential (DPV, Positive scan) Efc: First oxidation potential of ferrocene (DPV, Positive scan), (ca. +0.55V vs Ag / AgCl) The redox potential is measured by differential pulse voltammetry (DPV) using an electrochemical analyzer (ALS: CHI852D). The sample solution used for the measurement is prepared by dissolving the object to be measured and the supporting electrolyte in a solvent. The concentration of the object to be measured in the sample solution is 1.0 mmol / L, and the concentration of the supporting electrolyte is 100 mmol / L. N,N-dimethylformamide (DMF) is used as the solvent. Tetrabuthylammmonium hexafluorophosphate (TBHP) is used as the supporting electrolyte. A glassy carbon electrode is used as the working electrode. A platinum (Pt) electrode is used as the counter electrode. For the measurement of the energy level of the highest occupied molecular orbital (HOMO), see Reference 1 (ME Thompson, et.al., Organic Electronics, 6 (2005), p. 11-20) and Reference 2 (Organic Electronics, 10 (2009), p. 515-520).

[0673] (Triplet energy T 1 ) Triplet energy T 1 The measurement method includes the following methods. The compound to be measured was dissolved in EPA (diethyl ether:isopentane:ethanol = 5:5:2 (volume ratio)) at 10 -5 mol / L or more 10 -4 The phosphorescence spectrum (vertical axis: phosphorescence intensity, horizontal axis: wavelength) of this measurement sample is measured at low temperature (77[K]), a tangent line is drawn to the rising edge of the short wavelength side of this phosphorescence spectrum, and the wavelength value λ at the intersection of the tangent line and the horizontal axis is determined. edge Based on [nm], the amount of energy calculated from the following conversion formula (F1) is the triplet energy T 1 Let us assume that. Conversion formula (F1):T 1 [eV]=1239.85 / λ edge

[0674] The tangent to the rising edge of the phosphorescence spectrum on the short wavelength side is drawn as follows. When moving along the spectral curve from the short wavelength side of the phosphorescence spectrum to the shortest maximum of the spectral maxima, consider the tangent at each point on the curve toward 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 is at its maximum (i.e., the tangent at the inflection point) is the tangent to the rising edge of the phosphorescence spectrum on the short wavelength side. Note that a maximum point having a peak intensity of 15% or less of the maximum peak intensity of the spectrum is not included in the above-mentioned maximum value on the shortest wavelength side, and the tangent 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 regarded as the tangent to the rising edge on the short wavelength side of the phosphorescence spectrum. Phosphorescence can be measured using a spectrofluorometer body, model F-4500, manufactured by Hitachi High-Technologies Corp. However, the measuring device is not limited to this, and measurements may be performed by combining a cooling device, a low-temperature container, an excitation light source, and a light receiving device.

[0675] (Singlet energy S 1 ) Singlet energy S using solution 1 The measurement method (sometimes called the solution method) is as follows. 10 of the compounds to be measured -5 mol / L or more 10 -4 A toluene solution of less than mol / L is prepared and placed in a quartz cell, and the absorption spectrum of this sample (vertical axis: absorption intensity, horizontal axis: wavelength) is measured at room temperature (300K). A tangent line is drawn to the falling edge on the long wavelength side of this absorption spectrum, and the wavelength value λedge [nm] at the intersection of the tangent line and the horizontal axis is substituted into the following conversion formula (F2) to calculate the singlet energy. Conversion formula (F2):S 1 [eV]=1239.85 / λedge An example of an absorption spectrum measuring device is a spectrophotometer manufactured by Hitachi (device name: U3310), but is not limited to this.

[0676] The tangent to the falling edge on the long wavelength side of the absorption spectrum is drawn as follows. When moving along the spectral curve from the maximum value on the longest wavelength side among the maximum values ​​of the absorption spectrum in the direction towards longer wavelengths, consider the tangent at each point on the curve. As the curve falls (i.e., as the value on the vertical axis decreases), the slope of this tangent decreases and then increases repeatedly. The tangent drawn at the point where the slope is at its minimum value on the longest wavelength side (excluding cases where the absorbance is 0.1 or less) is regarded as the tangent to the falling edge on the long wavelength side of the absorption spectrum. Note that maximum points with absorbance values ​​of 0.2 or less are not included in the maximum value on the longest wavelength side.

[0677] (Maximum peak wavelength of compound) The method for measuring the maximum peak wavelength of a compound is as follows. A 5 μmol / L toluene solution of the compound to be measured is prepared and placed in a quartz cell, and the emission spectrum (vertical axis: emission intensity, horizontal axis: wavelength) of this sample is measured at room temperature (300K). The emission spectrum can be measured using a spectrofluorophotometer (device name: F-7000) manufactured by Hitachi High-Tech Science Corporation. Note that the emission spectrum measuring device is not limited to the device used here. In the emission spectrum, the peak wavelength at which the emission intensity is maximum is defined as the maximum peak wavelength. Note that in this specification, the maximum peak wavelength may be referred to as the maximum fluorescence emission peak wavelength (FL-peak).

[0678] Sixth Embodiment <Electronic equipment> The electronic device according to the present embodiment is equipped with the organic electroluminescence element according to any one of the above-described embodiments. Examples of the electronic device include display devices and light-emitting devices. Examples of the display device include display components (e.g., organic EL panel modules), televisions, mobile phones, tablets, and personal computers. Examples of the light-emitting device include lighting and vehicle lamps.

[0679] In one aspect of the electronic device of the present embodiment, a display device is equipped with the light-emitting device of the present embodiment. The light-emitting device can be used in the display device, for example, as a backlight for the display device.

[0680] [Modifications of the embodiment] The present invention is not limited to the above-described embodiment, and any modifications and improvements that can achieve the object of the present invention are included in the present invention.

[0681] For example, the number of light-emitting layers is not limited to one or two, and three or more light-emitting layers may be laminated. The light-emitting layer other than the light-emitting layer described in the above embodiment may be a fluorescent light-emitting layer or a phosphorescent light-emitting layer that utilizes light emission due to electronic transition from a triplet excited state directly to the ground state. Furthermore, when the organic EL element has a plurality of light-emitting layers, these light-emitting layers may be provided adjacent to each other, or the organic EL element may be a so-called tandem type organic EL element in which a plurality of light-emitting units are stacked via an intermediate layer.

[0682] In addition, for example, a blocking layer may be provided adjacent to at least one of the anode side and the cathode side of the light-emitting layer. The blocking layer is preferably disposed in contact with the light-emitting layer and blocks at least one of holes, electrons, and excitons. For example, when a blocking layer is disposed in contact with the light-emitting layer on the cathode side, the blocking layer transports electrons and prevents holes from reaching a layer (e.g., an electron transport layer) on the cathode side of the blocking layer. When the organic EL device includes an electron transport layer, it is preferable to include the blocking layer between the light-emitting layer and the electron transport layer. In addition, when a blocking layer is disposed in contact with the light-emitting layer on the anode side, the blocking layer transports holes and prevents electrons from reaching a layer (e.g., a hole transport layer) on the anode side of the blocking layer. When the organic EL device includes a hole transport layer, it is preferable to include the blocking layer between the light-emitting layer and the hole transport layer. A barrier layer may be provided adjacent to the light-emitting layer to prevent the excitation energy from leaking from the light-emitting layer to the surrounding layers, and prevents excitons generated in the light-emitting layer from migrating to layers on the electrode side of the barrier layer (e.g., the electron transport layer and the hole transport layer, etc.). The light emitting layer and the barrier layer are preferably in contact with each other.

[0683] In addition, the specific structure and shape in carrying out the present invention may be other structures and shapes within the scope of the invention in which the object of the present invention can be achieved. EXAMPLES

[0684] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples in any way.

[0685] <Compound> The structures of the compounds used as the first host material or the second host material in the production of the organic EL devices according to Examples 1 to 13 and Comparative Examples 1 to 12 are shown below.

[0686] [ka]

[0687] The structures of other compounds used in the production of the organic EL devices according to Examples 1 to 13 and Comparative Examples 1 to 12 are shown below.

[0688] [ka]

[0689] [ka]

[0690] [ka]

[0691] [ka]

[0692] <Fabrication of organic EL elements> The organic EL device was fabricated as follows.

[0693] Example 1 A 25mm x 75mm x 1.1mm thick glass substrate (Geomatec Co., Ltd.) with an ITO (Indium Tin Oxide) transparent electrode (anode) was ultrasonically cleaned in isopropyl alcohol for 5 minutes, and then UV ozone cleaned for 30 minutes. The film thickness of the ITO transparent electrode was 130nm. The glass substrate with the transparent electrode lines after cleaning was mounted on a substrate holder of a vacuum deposition apparatus, and the compound HT1 and the compound HA1 were co-deposited on the surface on which the transparent electrode lines were formed so as to cover the transparent electrode, to form a hole injection layer (also called the third anode-side organic layer) with a thickness of 10 nm. The proportion of the compound HT1 in this hole injection layer was 90% by mass, and the proportion of the compound HA1 was 10% by mass. On the hole injection layer, a compound HT1 was deposited by vapor deposition to form a first hole transport layer (also referred to as a second anode-side organic layer) having a thickness of 80 nm. A compound EB1 was deposited on the first hole transport layer to form a second hole transport layer (also referred to as an electron blocking layer or a first anode-side organic layer) having a thickness of 5 nm. On the second hole transport layer, the compound BH1-1 (first host material), the compound BH1-2 (second host material) and the compound BD1 (first light-emitting compound) were co-deposited to form a first light-emitting layer having a thickness of 5 nm. The proportion of the compound BH1-1 in the first light-emitting layer was 74 mass%, the proportion of the compound BH1-2 was 25 mass%, and the proportion of the compound BD1 was 1 mass%. A compound BH2-1 (third host material) and a compound BD1 (second light-emitting compound) were co-deposited on the first light-emitting layer to form a second light-emitting layer having a thickness of 15 nm. The proportion of the compound BH2-1 in the second light-emitting layer was 99% by mass, and the proportion of the compound BD1 was 1% by mass. On the second light-emitting layer, a compound HB1 was evaporated to form a first electron transporting layer (also referred to as a hole blocking layer) having a thickness of 5 nm. On the first electron transport layer, the compound ET1 and the compound Liq were co-deposited to form a second electron transport layer having a thickness of 25 nm. The proportion of the compound ET1 in the second electron transport layer was set to 50 mass %, and the proportion of the compound Liq was set to 50 mass %. Liq is an abbreviation for (8-quinolinolato)lithium. Ytterbium (Yb) was evaporated onto the second electron transport layer to form an electron injection layer having a thickness of 1 nm. Metallic Al was evaporated onto the electron injection layer to form a cathode with a thickness of 80 nm. The device configuration of Example 1 is shown in schematic form as follows. ITO(130) / HT1:HA1(10,90%:10%) / HT1(80) / EB1(5) / BH1-1:BH1-2:BD1(5,74%:2 5%:1%) / BH2-1:BD1(15,99%:1%) / HB1(5) / ET1:Liq(25,50%:50%) / Yb(1) / Al(80) The numbers in parentheses indicate the film thickness (unit: nm). Regarding the element configuration of Example 1, the percentages (99%:1%) in parentheses indicate the ratios (mass%) of the compounds HT1 and HA1 in the hole injection layer, the percentages (74%:25%:1%) indicate the ratios (mass%) of the compounds BH1-1, BH1-2, and BD1 in the first emitting layer, the percentages (99%:1%) indicate the ratios (mass%) of the compounds BH2-1 and BD1 in the second emitting layer, and the percentages (50%:50%) indicate the ratios (mass%) of the compounds ET1 and Liq in the second electron transport layer. The same notations are used below.

[0694] Example 2 The organic EL device of Example 2 was produced in the same manner as the organic EL device of Example 1, except that the ratio of compound BH1-1 and compound BH1-2 in the first emitting layer was changed to the ratio shown in Table 1.

[0695] Comparative Example 1 The organic EL device of Comparative Example 1 was prepared in the same manner as the organic EL device of Example 1, except that the compound BH1-2 was not used in the formation of the first emitting layer, and the compound BH1-1 and the compound BD1 were changed to the ratio shown in Table 1 and co-deposited to form the first emitting layer.

[0696] Comparative Example 2 The organic EL device of Comparative Example 2 was prepared in the same manner as the organic EL device of Example 1, except that the first emitting layer was formed by co-evaporating the compound BH1-2 and the compound BD1 in a ratio shown in Table 1 without using the compound BH1-1 in the formation of the first emitting layer.

[0697] <Evaluation of organic EL elements> The organic EL devices thus fabricated were evaluated as follows. The evaluation results are shown in Tables 1 to 8. The singlet energy S 1 , triplet energy T 1 , and HOMO are also shown in Tables 1 to 8.

[0698] (External quantum efficiency EQE and maximum peak wavelength λ p ) Current density is 10mA / cm 2 The spectral radiance spectrum when a voltage was applied to the element so as to satisfy the following equation was measured using a spectroradiometer CS-2000 (manufactured by Konica Minolta, Inc.). From the obtained spectral radiance spectrum, the external quantum efficiency EQE (unit: %) was calculated assuming that Lambertian radiation was performed. In addition, from the obtained spectral radiance spectrum, the maximum peak wavelength λ p (unit: nm) was calculated.

[0699] (Life span LT95) The organic EL device was fabricated with a current density of 50 mA / cm 2A voltage was applied so that the voltage was 0.01 V, and the time required for the luminance to reach 95% of the initial luminance (LT95 (unit: hour)) was measured as the lifetime. The luminance was measured using a spectroradiometer CS-2000 (manufactured by Konica Minolta, Inc.).

[0700] [Table 1]

[0701] Example 3 The organic EL device of Example 3 was prepared in the same manner as the organic EL device of Example 1, except that the thickness of the first emitting layer was changed to 10 nm, and the thickness of the second emitting layer was changed to 10 nm.

[0702] Example 4 The organic EL device of Example 4 was prepared in the same manner as the organic EL device of Example 2, except that the thickness of the first emitting layer was changed to 10 nm, and the thickness of the second emitting layer was changed to 10 nm.

[0703] Comparative Example 3 The organic EL element of Comparative Example 3 was prepared in the same manner as the organic EL element of Comparative Example 1, except that the thickness of the first emitting layer was changed to 10 nm, and the thickness of the second emitting layer was changed to 10 nm.

[0704] Comparative Example 4 The organic EL device of Comparative Example 4 was prepared in the same manner as the organic EL device of Comparative Example 2, except that the thickness of the first emitting layer was changed to 10 nm, and the thickness of the second emitting layer was changed to 10 nm.

[0705] [Table 2]

[0706] Example 5 The organic EL device of Example 5 was prepared in the same manner as the organic EL device of Example 1, except that the thickness of the first emitting layer was changed to 10 nm, the thickness of the second emitting layer was changed to 10 nm, and the second host material was changed to the compound BH1-3.

[0707] Example 6 The organic EL device of Example 6 was prepared in the same manner as the organic EL device of Example 2, except that the thickness of the first emitting layer was changed to 10 nm, the thickness of the second emitting layer was changed to 10 nm, and the second host material was changed to the compound BH1-3.

[0708] Comparative Example 5 The organic EL device of Comparative Example 5 was prepared in the same manner as the organic EL device of Comparative Example 2, except that the thickness of the first emitting layer was changed to 10 nm, the thickness of the second emitting layer was changed to 10 nm, and the second host material was changed to the compound BH1-3.

[0709] [Table 3]

[0710] Example 7 The organic EL device of Example 7 was prepared in the same manner as the organic EL device of Example 1, except that the thickness of the first emitting layer was changed to 10 nm, the thickness of the second emitting layer was changed to 10 nm, and the second host material was changed to the compound BH1-4.

[0711] Comparative Example 6 The organic EL device of Comparative Example 6 was prepared in the same manner as the organic EL device of Comparative Example 2, except that the thickness of the first emitting layer was changed to 10 nm, the thickness of the second emitting layer was changed to 10 nm, and the second host material was changed to the compound BH1-4.

[0712] [Table 4]

[0713] Example 8 A 25mm x 75mm x 1.1mm thick glass substrate (Geomatec Co., Ltd.) with an ITO (Indium Tin Oxide) transparent electrode (anode) was ultrasonically cleaned in isopropyl alcohol for 5 minutes, and then UV ozone cleaned for 30 minutes. The film thickness of the ITO transparent electrode was 130nm. The glass substrate with the transparent electrode lines after cleaning was mounted on a substrate holder of a vacuum deposition apparatus, and the compound HT2 and the compound HA1 were co-deposited on the surface on which the transparent electrode lines were formed so as to cover the transparent electrode, to form a hole injection layer (also called the third anode-side organic layer) with a thickness of 10 nm. The proportion of the compound HT2 in this hole injection layer was 97% by mass, and the proportion of the compound HA1 was 3% by mass. On the hole injection layer, a compound HT2 was deposited to form a first hole transport layer (also referred to as a second anode-side organic layer) having a thickness of 85 nm. A compound EB1 was deposited on the first hole transport layer to form a second hole transport layer (also referred to as an electron blocking layer or a first anode-side organic layer) having a thickness of 5 nm. On the second hole transport layer, the compound BH1-5 (first host material), the compound BH1-6 (second host material), and the compound BD2 (first light-emitting compound) were co-deposited to form a first light-emitting layer having a thickness of 5 nm. The proportion of the compound BH1-5 in the first light-emitting layer was 79 mass%, the proportion of the compound BH1-6 was 20 mass%, and the proportion of the compound BD2 was 1 mass%. On the first emitting layer, the compound BH2-2 (third host material) and the compound BD2 (second emitting compound) were co-deposited to form a second emitting layer having a thickness of 15 nm. The proportion of the compound BH2-2 in the second emitting layer was 99 mass %, and the proportion of the compound BD2 was 1 mass %. On the second light-emitting layer, a compound HB1 was evaporated to form a first electron transporting layer (also referred to as a hole blocking layer) having a thickness of 5 nm. On the first electron transport layer, the compound ET2 and the compound Liq were co-deposited to form a second electron transport layer having a thickness of 25 nm. The proportion of the compound ET2 in the second electron transport layer was 50 mass %, and the proportion of the compound Liq was 50 mass %. A compound Liq was deposited on the second electron transport layer to form an electron injection layer having a thickness of 1 nm. Metallic Al was evaporated onto the electron injection layer to form a cathode with a thickness of 80 nm. The device configuration of Example 8 is shown in schematic form as follows. ITO(130) / HT2:HA1(10,97%:3%) / HT1(85) / EB1(5) / BH1-5:BH1-6:BD2(5,79%:20 %:1%) / BH2-2:BD2(15,99%:1%) / HB1(5) / ET2:Liq(25,50%:50%) / Liq(1) / Al(80)

[0714] Comparative Example 7 The organic EL device of Comparative Example 7 was prepared in the same manner as the organic EL device of Example 8, except that the first emitting layer was formed by co-deposition of the compound BH1-5 and the compound BD2 in the ratio shown in Table 5 without using the compound BH1-6 in the formation of the first emitting layer.

[0715] Comparative Example 8 The organic EL device of Comparative Example 8 was prepared in the same manner as the organic EL device of Example 8, except that the first emitting layer was formed by co-deposition of the compounds BH1-6 and BD2 in the ratio shown in Table 5 without using the compound BH1-5 in the formation of the first emitting layer.

[0716] [Table 5]

[0717] Example 9 A 25mm x 75mm x 1.1mm thick glass substrate (Geomatec Co., Ltd.) with an ITO (Indium Tin Oxide) transparent electrode (anode) was ultrasonically cleaned in isopropyl alcohol for 5 minutes, and then UV ozone cleaned for 30 minutes. The film thickness of the ITO transparent electrode was 130nm. The glass substrate with the transparent electrode lines after cleaning was mounted on a substrate holder of a vacuum deposition apparatus, and the compound HT3 and the compound HA1 were co-deposited on the surface on which the transparent electrode lines were formed so as to cover the transparent electrode, to form a hole injection layer (also called the third anode-side organic layer) with a thickness of 10 nm. The proportion of the compound HT3 in this hole injection layer was 97% by mass, and the proportion of the compound HA1 was 3% by mass. A compound HT3 was deposited on the hole injection layer to form a first hole transport layer (also referred to as a second anode-side organic layer) having a thickness of 75 nm. A compound EB2 was deposited on the first hole transport layer to form a second hole transport layer (also referred to as an electron blocking layer or a first anode-side organic layer) having a thickness of 10 nm. On the second hole transport layer, the compound BH1-5 (first host material), the compound BH1-6 (second host material), and the compound BD3 (first light-emitting compound) were co-deposited to form a first light-emitting layer having a thickness of 5 nm. The proportion of the compound BH1-5 in the first light-emitting layer was 48 mass%, the proportion of the compound BH1-6 was 50 mass%, and the proportion of the compound BD3 was 2 mass%. On the first emitting layer, the compound BH2-3 (third host material) and the compound BD3 (second emitting compound) were co-deposited to form a second emitting layer having a thickness of 15 nm. The proportion of the compound BH2-3 in the second emitting layer was 98 mass %, and the proportion of the compound BD3 was 2 mass %. On the second light-emitting layer, a compound HB1 was evaporated to form a first electron transporting layer (also referred to as a hole blocking layer) having a thickness of 5 nm. On the first electron transport layer, the compound ET3 and the compound Liq were co-deposited to form a second electron transport layer having a thickness of 25 nm. The proportion of the compound ET3 in the second electron transport layer was 50 mass %, and the proportion of the compound Liq was 50 mass %. Ytterbium (Yb) was evaporated onto the second electron transport layer to form an electron injection layer having a thickness of 1 nm. Metallic Al was evaporated onto the electron injection layer to form a cathode with a thickness of 80 nm. The device configuration of Example 9 is shown in schematic form as follows. ITO(130) / HT3:HA1(10,97%:3%) / HT3(75) / EB2(10) / BH1-5:BH1-6:BD3(5,48%:5 0%:2%) / BH2-3:BD3(15,99%:2%) / HB1(5) / ET3:Liq(25,50%:50%) / Yb(1) / Al(80)

[0718] Comparative Example 9 The organic EL device of Comparative Example 9 was prepared in the same manner as the organic EL device of Example 9, except that the first emitting layer was formed by co-deposition of the compounds BH1-5 and BD3 in the ratio shown in Table 6 without using the compound BH1-6 in the formation of the first emitting layer.

[0719] Comparative Example 10 The organic EL device of Comparative Example 10 was prepared in the same manner as the organic EL device of Example 9, except that the first emitting layer was formed by co-deposition of the compounds BH1-6 and BD3 in the ratio shown in Table 6 without using the compound BH1-5 in the formation of the first emitting layer.

[0720] [Table 6]

[0721] Example 10 The organic EL device of Example 10 was prepared in the same manner as the organic EL device of Example 9, except that compound BH1-1 was used instead of compound BH1-5 as the first host material, the proportion of compound BH1-1 in the first emitting layer was 49 mass%, the proportion of compound BH1-6 was 49 mass%, and the proportion of compound BD3 was 2 mass%.

[0722] Example 11 The organic EL device of Example 11 was prepared in the same manner as the organic EL device of Example 9, except that compound BH1-1 was used instead of compound BH1-5 as the first host material, and the proportion of compound BH1-1 in the first emitting layer was 24 mass %, the proportion of compound BH1-6 was 74 mass %, and the proportion of compound BD3 was 2 mass %.

[0723] Example 12 The organic EL device of Example 12 was prepared in the same manner as the organic EL device of Example 9, except that compound BH1-1 was used instead of compound BH1-5 as the first host material, the proportion of compound BH1-1 in the first emitting layer was 10 mass %, the proportion of compound BH1-6 was 88 mass %, and the proportion of compound BD3 was 2 mass %.

[0724] Comparative Example 11 The organic EL device of Comparative Example 11 was prepared in the same manner as the organic EL device of Example 10, except that the first emitting layer was formed by co-deposition of the compounds BH1-1 and BD3 in the ratio shown in Table 7 without using the compound BH1-6 in the formation of the first emitting layer.

[0725] Comparative Example 10 is relisted in Table 7.

[0726] [Table 7]

[0727] Example 13 The organic EL device of Example 13 was prepared in the same manner as the organic EL device of Example 9, except that compound BH1-2 was used instead of compound BH1-5 as the first host material, and the proportion of compound BH1-2 in the first emitting layer was 48 mass %, the proportion of compound BH1-6 was 50 mass %, and the proportion of compound BD3 was 2 mass %.

[0728] Comparative Example 12 The organic EL device of Comparative Example 12 was prepared in the same manner as the organic EL device of Example 13, except that the first emitting layer was formed by co-deposition of the compounds BH1-2 and BD3 in the ratio shown in Table 8 without using the compound BH1-6 in the formation of the first emitting layer.

[0729] Comparative Example 10 is relisted in Table 8.

[0730] [Table 8]

[0731] <Compound evaluation> The compounds used in the fabrication of the elements of the Examples and Comparative Examples were evaluated by the following methods.

[0732] (Highest Occupied Orbital (HOMO)) The value of the energy level of the highest occupied molecular orbital (HOMO) of the measurement object was calculated by the following formula (F3): The unit of the energy level of the highest occupied molecular orbital (HOMO) is eV. HOMO=-1.4×(Eox-Efc)-4.6eV …(F3) In formula (F3), Eox and Efc are as follows. Eox: First oxidation potential (DPV, Positive scan) Efc: First oxidation potential of ferrocene (DPV, Positive scan), (ca. +0.55V vs Ag / AgCl) The redox potential was measured by differential pulse voltammetry (DPV) using an electrochemical analyzer (ALS: CHI852D). The sample solution used for the measurement was prepared by dissolving the object to be measured and the supporting electrolyte in a solvent. The concentration of the object to be measured in the sample solution was 1.0 mmol / L, and the concentration of the supporting electrolyte was 100 mmol / L. N,N-dimethylformamide (DMF) was used as the solvent. Tetrabutylammonium hexafluorophosphate (TBHP) was used as the supporting electrolyte. A glassy carbon electrode was used as the working electrode. A platinum electrode was used as the counter electrode.

[0733] (Triplet energy T 1 ) The compound to be measured was dissolved in EPA (diethyl ether: isopentane: ethanol = 5:5:2 (volume ratio)) to obtain a solution with a concentration of 10 μmol / L, and this solution was placed in a quartz cell to prepare a measurement sample. The phosphorescence spectrum (vertical axis: phosphorescence emission intensity, horizontal axis: wavelength) of this measurement sample was measured at low temperature (77 [K]), a tangent was drawn to the rising edge on the short wavelength side of this phosphorescence spectrum, and the wavelength value λ at the intersection of the tangent and the horizontal axis was determined. edge Based on [nm], the amount of energy calculated from the following conversion formula (F1) is the triplet energy T 1 The triplet energy T 1 Depending on the measurement conditions, an error of about 0.02 eV may occur. Conversion formula (F1):T 1[eV]=1239.85 / λ edge

[0734] The tangent to the rising edge of the phosphorescence spectrum on the short wavelength side is drawn as follows. When moving along the spectral curve from the short wavelength side of the phosphorescence spectrum to the shortest maximum of the spectral maxima, consider the tangent at each point on the curve toward 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 is at its maximum (i.e., the tangent at the inflection point) is the tangent to the rising edge of the phosphorescence spectrum on the short wavelength side. Note that a maximum point having a peak intensity of 15% or less of the maximum peak intensity of the spectrum is not included in the above-mentioned maximum value on the shortest wavelength side, and the tangent 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 regarded as the tangent to the rising edge on the short wavelength side of the phosphorescence spectrum. The phosphorescence was measured using a Hitachi High-Technologies Corporation F-4500 spectrofluorophotometer.

[0735] (Singlet energy S 1 ) A 10μmol / L toluene solution of the compound to be measured was prepared and placed in a quartz cell, and the absorption spectrum (vertical axis: absorption intensity, horizontal axis: wavelength) of this sample was measured at room temperature (300K). A tangent line was drawn to the falling edge on the long wavelength side of this absorption spectrum, and the wavelength value λedge [nm] at the intersection point between the tangent line and the horizontal axis was substituted into the following conversion formula (F2) to calculate the singlet energy. Conversion formula (F2):S 1 [eV]=1239.85 / λedge The absorption spectrum measuring device used was a spectrophotometer manufactured by Hitachi (device name: U3310).

[0736] The tangent to the falling edge on the long wavelength side of the absorption spectrum is drawn as follows. When moving along the spectral curve from the maximum value on the longest wavelength side among the maximum values ​​of the absorption spectrum in the direction towards longer wavelengths, consider the tangent at each point on the curve. As the curve falls (i.e., as the value on the vertical axis decreases), the slope of this tangent decreases and then increases repeatedly. The tangent drawn at the point where the slope is at its minimum value on the longest wavelength side (excluding cases where the absorbance is 0.1 or less) is regarded as the tangent to the falling edge on the long wavelength side of the absorption spectrum. Note that maximum points with absorbance values ​​of 0.2 or less are not included in the maximum value on the longest wavelength side.

[0737] (Measurement of maximum fluorescence emission peak wavelength (FL-peak)) The compound to be measured is 4.9 x 10 -6 A toluene solution was prepared by dissolving the compound in toluene at a concentration of 1 mol / L. The maximum peak wavelength λ (unit: nm) of the fluorescence emission when the toluene solution was excited at 390 nm was measured using a fluorescence spectrum measuring device (fluorescence spectrophotometer F-7000 (manufactured by Hitachi High-Tech Science Corporation)). The maximum fluorescence emission peak wavelength λ of compound BD1 was 445 nm. The maximum fluorescence emission peak wavelength λ of compound BD2 was 455 nm. The maximum fluorescence emission peak wavelength λ of compound BD3 was 452 nm.

[0738] The evaluation results of the compounds are shown in Table 9.

[0739] [Table 9] [Explanation of symbols]

[0740] Reference Signs List 1... organic electroluminescent element, 1A... organic electroluminescent element, 10... organic layer, 10A... organic layer, 2... substrate, 3... anode, 4... cathode, 5... light-emitting region, 5A... light-emitting region, 51... first light-emitting layer, 52... second light-emitting layer, 6... first hole transport zone, 61... first anode-side organic layer, 62... second anode-side organic layer, 63... third anode-side organic layer, 7... first electron transport zone, 71... electron transport layer, 72... electron injection layer.

Claims

1. An organic electroluminescence element, An anode; A cathode; a light emitting region disposed between the anode and the cathode; a first anode-side organic layer disposed between the light-emitting region and the anode; the first anode-side organic layer contains a first material, the light-emitting region includes a first light-emitting layer and a second light-emitting layer; the first light-emitting layer is disposed between the first anode-side organic layer and the second light-emitting layer, the first light-emitting layer is in direct contact with the first anode-side organic layer, the first light-emitting layer contains a first host material and a second host material; the second light-emitting layer contains a third host material; an energy level of the highest occupied molecular orbital (HOMO) (HT1) of the first material, an energy level of the highest occupied molecular orbital (HOMO) (H1) of the first host material, and an energy level of the highest occupied molecular orbital (HOMO) (H2) of the second host material satisfy the relationship of the following mathematical formula (Mathematical Formula A1), The triplet energy T of the first host material １ (H1) and the triplet energy T １ (H3) satisfies the relationship of the following formula (Math A2), The triplet energy T of the second host material １ (H2) and the triplet energy T １ (H3) satisfies the relationship of the following formula (Math A3), Organic electroluminescent element. HOMO(HT1)>HOMO(H2)>HOMO(H1) ... (Math A1) T １ (H1)>T １ (H3) …(number A2) T １ (H2)>T １ (H3) …(number A3)

2. The triplet energy T of the first host material １ (H1) satisfies the relationship of the following formula (Math A4), The triplet energy T of the second host material １ (H2) satisfies the relationship of the following formula (Math A5): The organic electroluminescence device according to claim 1 . 1.8eV<T １ (H1)<2.5eV…(Number A4) 1.8eV<T １ (H2)<2.5eV…(Number A5)

3. The triplet energy T of the first host material １ (H1) satisfies the relationship of the following formula (Math. A41), The triplet energy T of the second host material １ (H2) satisfies the relationship of the following formula (Math. A51): The organic electroluminescence device according to claim 1 or 2. 2.0 eV<T １ (H1) < 2.3 eV ... (Number A41) 2.0 eV<T １ (H2) < 2.3 eV ... (Number A51)

4. The HOMO (H2) satisfies the relationship of the following formula (Mathematical Formula A10): The organic electroluminescence device according to claim 1 . HOMO(H2)>-5.7 eV... (Number A10)

5. The HOMO (H1) satisfies the relationship of the following formula (Mathematical Formula A11): The organic electroluminescence device according to claim 1 . -5.6 eV>HOMO(H1) ... (Number A11)

6. the first light-emitting layer contains a first light-emitting compound, the second light-emitting layer contains a second light-emitting compound, The organic electroluminescence device according to claim 1 .

7. the first luminescent compound and the second luminescent compound are each independently a compound that exhibits luminescence having a maximum peak wavelength of 500 nm or less; The organic electroluminescence device according to claim 6 .

8. An organic electroluminescence element, An anode; A cathode; a light emitting region disposed between the anode and the cathode; the light emitting region comprises a first light emitting layer; the first light-emitting layer contains a first host material and a second host material; The first host material and the second host material are different from each other, The triplet energy T of the first host material １ (H1) satisfies the relationship of the following formula (Math A4), The triplet energy T of the second host material １ (H2) satisfies the relationship of the following formula (Math A5): Organic electroluminescent element. 1.8eV<T １ (H1)<2.5eV…(Number A4) 1.8eV<T １ (H2)<2.5eV…(Number A5)

9. The triplet energy T of the first host material １ (H1) satisfies the relationship of the following formula (Math. A41), The triplet energy T of the second host material １ (H2) satisfies the relationship of the following formula (Math. A51): The organic electroluminescence device according to claim 8 . 2.0 eV<T １ (H1) < 2.3 eV ... (Number A41) 2.0 eV<T １ (H2) < 2.3 eV ... (Number A51)

10. The HOMO (H2) satisfies the relationship of the following formula (Mathematical Formula A10): The organic electroluminescence device according to claim 8 or 9. HOMO(H2)>-5.7 eV... (Number A10)

11. The HOMO (H1) satisfies the relationship of the following formula (Mathematical Formula A11): The organic electroluminescence device according to claim 8 . -5.6 eV>HOMO(H1) ... (Number A11)

12. a first anode-side organic layer disposed between the light-emitting region and the anode; the first light-emitting layer is in direct contact with the first anode-side organic layer, the first anode-side organic layer contains a first material, the first material, the first host material, and the second host material are different from each other; an energy level of the highest occupied molecular orbital (HOMO) (HT1) of the first material, an energy level of the highest occupied molecular orbital (HOMO) (H1) of the first host material, and an energy level of the highest occupied molecular orbital (HOMO) (H2) of the second host material satisfy the relationship of the following mathematical formula (Math A1): The organic electroluminescence device according to claim 8 . HOMO(HT1)>HOMO(H2)>HOMO(H1) ... (Math A1)

13. The first light-emitting layer contains a first light-emitting compound. The organic electroluminescence device according to claim 8 .

14. The first luminescent compound is a compound that exhibits luminescence having a maximum peak wavelength of 500 nm or less. The organic electroluminescence device according to claim 13 .

15. the light emitting region comprises a second light emitting layer; the second light-emitting layer contains a third host material; the first host material, the second host material, and the third host material are different from each other, The triplet energy T of the first host material １ (H1) and the triplet energy T １ (H3) satisfies the relationship of the following formula (Math A2), The triplet energy T of the second host material １ (H2) and the triplet energy T １ (H3) satisfies the relationship of the following formula (Math A3), The organic electroluminescence device according to claim 8 . T １ (H1)>T １ (H3) …(number A2) T １ (H2)>T １ (H3) …(number A3)

16. the second light-emitting layer contains a second light-emitting compound, The organic electroluminescence device according to claim 15 .

17. The second luminescent compound is a compound that exhibits luminescence having a maximum peak wavelength of 500 nm or less. The organic electroluminescence device according to claim 16 .

18. A composition comprising a first compound and a second compound, the first compound and the second compound are different compounds, The first compound and the second compound each independently contain at least one of a structure satisfying the following condition (i) and a structure satisfying the following condition (ii) in a molecule: composition. Condition (i) The compound has a biphenyl structure in which a first benzene ring and a second benzene ring are linked by a single bond, and the first benzene ring and the second benzene ring in the biphenyl structure are further linked by a bridge in at least one portion other than the single bond. Condition (ii) has a first connecting structure including a benzene ring and a naphthalene ring connected by a single bond, and the benzene ring and the naphthalene ring in the first connecting structure are each independently further fused with a single ring or a fused ring or are not fused with a fused ring, and the benzene ring and the naphthalene ring in the first connecting structure are further connected by a bridge in at least one portion other than the single bond.

19. At least one of the first compound and the second compound contains a structure that satisfies the condition (i) in a molecule.

20. The composition of claim 18.

20. the first benzene ring and the second benzene ring in the biphenyl structure are further linked by the bridge satisfying the condition (i) at one portion other than the single bond; 20. The composition of claim 19.

21. The bridge of condition (i) contains a double bond; 21. The composition of claim 19 or claim 20.

22. the first benzene ring and the second benzene ring in the biphenyl structure are further linked by the bridge satisfying the condition (i) at two portions other than the single bond, The bridge of condition (i) does not contain a double bond; 20. The composition of claim 19.

23. At least one of the first compound and the second compound contains a structure that satisfies the condition (ii) in a molecule.

20. The composition of claim 18.

24. The bridge of condition (ii) contains a double bond; 24. The composition of claim 23.

25. The first compound and the second compound are each independently any compound selected from the group consisting of a compound represented by the following general formula (H11), a compound represented by the general formula (H12), a compound represented by the general formula (H13), a compound represented by the general formula (H14), a compound represented by the general formula (H15), and a compound represented by the general formula (H16).

20. The composition of claim 18. 【Chemistry 1】 (In the general formula (H11), R １０１ ~R １１０ , and R １１１ ~R １２０ are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ A group represented by -COOR ８０２ A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, However, R １０１ ~R １１０ One of them is L １０１ indicates the bonding position with R １１１ ~R １２０ One of them is L １０１ indicates the bonding position with L １０１ teeth, Single bond, a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms, mx is 0, 1, 2, 3, 4 or 5; L １０１ When there are two or more, there are two or more L １０１ are the same or different from each other.) 【Chemistry 2】 (In the general formula (H12), Xa is an oxygen atom, a sulfur atom, or C(R １２０１ ) (R １２０２ ), or Si(R １２０３ ) (R １２０４ ) and R １２０１ ~R １２０４ are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by -N(R ９０６ ) (R ９０７ ) a group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R １２１ ~R １３０ Among the groups of two or more adjacent joined together to form a substituted or unsubstituted monocyclic ring, or combine with each other to form a substituted or unsubstituted fused ring, or Not bonded to each other, R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted condensed ring. １２１ ~R １３０ are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by -N(R ９０６ ) (R ９０７ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ A group represented by -COOR ８０２ A group represented by Halogen atoms, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or A group represented by general formula (H121), However, R １２１ ~R １３０ At least one of the above is a group represented by general formula (H121), When a plurality of groups represented by the general formula (H121) are present, the plurality of groups represented by the general formula (H121) are the same or different from each other, L １２ teeth, Single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, ma is 0, 1, 2 or 3; L １２ When there are two or more, there are two or more L １２ are identical or different from each other, Ar １２ represents a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, Ar １２ When two or more are present, two or more Ar １２ are identical or different from each other, In the above general formula (H121), * indicates the bonding position. 【Chemistry 3】 (In the general formula (H13), R １３１ ~R １４０ , Ar １３１ and Ar １３２ are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ A group represented by -COOR ８０２ A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or A group represented by general formula (H131), However, R １３１ ~R １４０ , Ar １３１ and Ar １３２ At least one of the above is a group represented by general formula (H131), When a plurality of groups represented by the general formula (H131) are present, the plurality of groups represented by the general formula (H131) are the same or different from each other, L １３ teeth, Single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar １３ teeth, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, mb is 0, 1, 2, 3, 4 or 5; L １３ When there are two or more, there are two or more L １３ are identical or different from each other, Ar １３ When two or more are present, two or more Ar １３ are identical or different from each other, In the general formula (H131), * indicates the bonding position with the benz[a]anthracene ring in the general formula (H13). 【Chemistry 4】 (In the general formula (H14), R １Ａ and R １Ｂ are each independently a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, a substituted or unsubstituted aryl group having 6 to 17 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 17 ring atoms, However, R １Ａ and R １Ｂ at least one of the groups is a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms; R １４１ ~R １４４ and R １４５ ~R １４８ Any one of the adjacent pairs of two or more of joined together to form a substituted or unsubstituted monocyclic ring, or combine with each other to form a substituted or unsubstituted fused ring; The group represented by general formula (H141) is When a substituted or unsubstituted monocyclic ring or a substituted or unsubstituted condensed ring is formed on the ring A side, R １４２ or a carbon atom C on the ring B side among the carbon atoms constituting the monocyclic ring on the ring A side and the condensed ring on the ring A side ２ Carbon atom C of ring A bonded to １ Attached to the carbon atom furthest from In the case where a substituted or unsubstituted monocyclic ring or a substituted or unsubstituted condensed ring is not formed on the ring A side but is formed on the ring B side, R １４２ Attached to a carbon atom attached to R which is not a group represented by general formula (H141) １４２ R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted condensed ring. １４１ , R １４３ , R １４４ and R １４５ ~R １４８ are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by -N(R ９０６ ) (R ９０７ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ A group represented by -COOR ８０２ A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 17 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 17 ring atoms, In the general formula (H141), Ar １４ represents a substituted or unsubstituted aryl group having four or more condensed rings or a substituted or unsubstituted heterocyclic group having four or more condensed rings, L １４ teeth, Single bond, a substituted or unsubstituted arylene group having 6 to 17 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 17 ring atoms, mc is 0, 1 or 2; * indicates the bonding position to an atom constituting the ring of general formula (H14), However, the compound represented by the general formula (H14) does not contain three or more substituted or unsubstituted aryl groups having four or more condensed rings and three or more substituted or unsubstituted heterocyclic groups having four or more condensed rings in the molecule of the compound represented by the general formula (H14). 【Chemistry 5】 (In the general formula (H15), R １５０ ~R １５９ are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ A group represented by -COOR ８０２ A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or A group represented by general formula (H150), However, R １５０ ~R １５９ At least one of the above is a group represented by general formula (H150), When a plurality of groups represented by the general formula (H150) are present, the plurality of groups represented by the general formula (H150) are the same or different from each other, L １５１ teeth, Single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar １５１ teeth, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, mg is 0, 1, 2, 3, 4 or 5; L １５１ When there are two or more, there are two or more L １５１ are identical or different from each other, Ar １５１ When two or more are present, two or more Ar １５１ are identical or different from each other, In the general formula (H150), * indicates the bonding position to the pyrene ring in the general formula (H15). 【Chemistry 6】 (In the general formula (H16), R １６０ ~R １６９ At least one pair of adjacent pairs of joined together to form a substituted or unsubstituted monocyclic ring, or combine with each other to form a substituted or unsubstituted fused ring, or Not bonded to each other, R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted condensed ring. １６０ ~R １６９ are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ A group represented by -COOR ８０２ A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or A group represented by general formula (H161), However, when the substituted or unsubstituted monocyclic ring has a substituent, the substituent when the substituted or unsubstituted condensed ring has a substituent, and R １６０ ~R １６９ At least one of the above is a group represented by general formula (H161), When a plurality of groups represented by the general formula (H161) are present, the plurality of groups represented by the general formula (H161) are the same or different from each other, L １６ teeth, Single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar １６ teeth, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, mf is 0, 1, 2, 3, 4 or 5; L １６ When there are two or more, there are two or more L １６ are identical or different from each other, Ar １６ When two or more are present, two or more Ar １６ are identical or different from each other, In the general formula (H161), * indicates the bonding position to the ring represented by the general formula (H16). (In the first compound and the second compound, R ９０１ , R ９０２ , R ９０３ , R ９０４ , R ９０５ , R ９０６ , R ９０７ , R ８０１ and R ８０２ are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R ９０１ When there are multiple R ９０１ are the same or different from each other, R ９０２ When there are multiple R ９０２ are the same or different from each other, R ９０３ When there are multiple R ９０３ are the same or different from each other, R ９０４ When there are multiple R ９０４ are the same or different from each other, R ９０５ When there are multiple R ９０５ are the same or different from each other, R ９０６ When there are multiple R ９０６ are the same or different from each other, R ９０７ When there are multiple R ９０７ are the same or different from each other, R ８０１ When there are multiple R ８０１ are the same or different from each other, R ８０２ When there are multiple R ８０２ are the same or different from each other.)

26. The first compound and the second compound are each independently any compound selected from the group consisting of a compound represented by the following general formula (H111), a compound represented by the general formula (H122), a compound represented by the general formula (H132), and a compound represented by the general formula (H133):

26. The composition of claim 25. 【Chemistry 7】 (In the general formula (H111), R １０１ , R １０２ , R １０４ ~R １１０ , and R １１１ ~R １１９ are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ A group represented by -COOR ８０２ A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L １０１ and mx each represent L in the general formula (H11). １０１ and mx.) 【Chemistry 8】 (In the general formula (H122), R １２１ ~R １２８ And R １３０ are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by -N(R ９０６ ) (R ９０７ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ A group represented by -COOR ８０２ A group represented by Halogen atoms, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, Ar １２ , L １２ and ma each represent Ar in the general formula (H121). １２ , L １２ and ma). 【Chemistry 9】 (In the general formulae (H132) and (H133), R １３１ ~R １４０ , Ar １３１ and Ar １３２ are, respectively, Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ A group represented by -COOR ８０２ A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L １３ , Ar １３ and mb each represent L in the general formula (H131). １３ , Ar １３ and mb.)

27. The group represented by general formula (H150) is a group represented by general formula (H151):

26. The composition of claim 25. 【Chemistry 10】 (In the general formula (H151), X １５ is an oxygen atom or a sulfur atom, L １５ teeth, Single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, md is 0, 1, 2, 3, 4 or 5; L １５ When there are two or more, there are two or more L １５ are identical or different from each other, R １５００ ~R １５０４ At least one pair of adjacent pairs of joined together to form a substituted or unsubstituted monocyclic ring, or combine with each other to form a substituted or unsubstituted fused ring, or Not bonded to each other, R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted condensed ring. １５００ ~R １５０４ are each independently Hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ A group represented by -COOR ８０２ A group represented by Halogen atoms, Cyano group, Nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, Multiple R １５００ are the same or different from each other, In the general formula (H151), * indicates the bonding position to the pyrene ring in the general formula (H15).

28. the first compound and the second compound do not have a bis-carbazole structure and an amine structure in their molecules; 28. A composition according to any one of claims 18 to 27.

29. A composition comprising a first compound and a second compound, the first compound and the second compound are different compounds, an energy level HOMO (C1) of the highest occupied molecular orbital of the first compound and an energy level HOMO (C2) of the highest occupied molecular orbital of the second compound satisfy the relationship of the following mathematical formula (Math. A7), The triplet energy T of the first compound １ (C1) satisfies the relationship of the following formula (Math. A8), The triplet energy T of the second compound １ A composition, wherein (C2) satisfies the relationship of the following formula (A9). HOMO(C2)>HOMO(C1)...(Number A7) 1.8eV<T １ (C1)<2.5eV…(Number A8) 1.8eV<T １ (C2) < 2.5 eV ... (number A9)

30. The triplet energy T of the first compound １ (C1) satisfies the relationship of the following formula (Math. A81), The triplet energy T of the second compound １ (C2) satisfies the relationship of the following formula (Math. A91):

30. The composition of claim 29. 2.0 eV<T １ (C1) < 2.3 eV ... (Number A81) 2.0eV<T １ (C2)<2.3eV…(Number A91)

31. The HOMO (C2) satisfies the relationship of the following formula (Mathematical Formula A12):

31. The composition of claim 29 or claim 30. HOMO(C2)>-5.7eV...(Number A12)

32. The HOMO (C1) satisfies the relationship of the following formula (Mathematical Formula A13):

32. The composition of any one of claims 29 to 31. -5.6 eV>HOMO(C1) ... (Number A13)

33. A mixed powder containing a first compound and a second compound, the first compound and the second compound are different compounds, The first compound and the second compound each independently contain at least one of a structure satisfying the following condition (i) and a structure satisfying the following condition (ii) in a molecule: Mixed powder. Condition (i) The compound has a biphenyl structure in which a first benzene ring and a second benzene ring are linked by a single bond, and the first benzene ring and the second benzene ring in the biphenyl structure are further linked by a bridge in at least one portion other than the single bond. Condition (ii) has a first connecting structure including a benzene ring and a naphthalene ring connected by a single bond, and the benzene ring and the naphthalene ring in the first connecting structure are each independently further condensed with a single ring or a condensed ring or are not condensed with a single ring or a condensed ring, and the benzene ring and the naphthalene ring in the first connecting structure are further connected by a bridge in at least one portion other than the single bond.

34. A mixed powder containing a first compound and a second compound, the first compound and the second compound are different compounds, an energy level HOMO (C1) of the highest occupied molecular orbital of the first compound and an energy level HOMO (C2) of the highest occupied molecular orbital of the second compound satisfy the relationship of the following mathematical formula (Math. A7), The triplet energy T of the first compound １ (C1) satisfies the relationship of the following formula (Math. A8), The triplet energy T of the second compound １ (C2) satisfies the relationship of the following formula (Math A9): Mixed powder. HOMO(C2)>HOMO(C1)...(Number A7) 1.8eV<T １ (C1)<2.5eV…(Number A8) 1.8eV<T １ (C2) < 2.5 eV ... (number A9)

35. An organic electroluminescence element, An anode; A cathode; a light emitting region disposed between the anode and the cathode; the light emitting region comprises a first light emitting layer; The first light-emitting layer comprises the composition according to any one of claims 18 to 32. Organic electroluminescent element.

36. The first light-emitting layer contains a first light-emitting compound. The organic electroluminescence device according to claim 35.

37. The first luminescent compound is a compound that exhibits luminescence having a maximum peak wavelength of 500 nm or less. The organic electroluminescence device according to claim 36.

38. the light emitting region comprises a second light emitting layer; the second light-emitting layer contains a third compound, the first compound, the second compound, and the third compound are different from each other, The triplet energy T of the first compound １ (C1) and the triplet energy T １ (C3) satisfies the relationship of the following formula (Math. A14), The triplet energy T of the second compound １ (C2) and the triplet energy T １ (C3) and satisfy the relationship of the following formula (Math A15):

38. The organic electroluminescence device according to claim 35 . T １ (C1)>T １ (C3) …(Number A14) T １ (C2) > T １ (C3) …(Number A15)

39. the second light-emitting layer contains a second light-emitting compound, 39. The organic electroluminescence device according to claim 38.

40. The second luminescent compound is a compound that exhibits luminescence having a maximum peak wavelength of 500 nm or less.

40. The organic electroluminescence device according to claim 39.

41. the first light-emitting layer is disposed between the anode and the second light-emitting layer; The organic electroluminescence device according to claim 15 or 38.

42. an electron transport layer disposed between the light emitting region and the cathode; The organic electroluminescence device according to any one of claims 1 to 17 and claims 35 to 41.

43. An electronic device comprising the organic electroluminescence element according to any one of claims 1 to 17 and claims 35 to 42.

Images