Organic compound layer, organic electroluminescent element, and electronic device

Abstract

To provide an organic compound layer capable of suppressing the occurrence of crosstalk.SOLUTION: An organic compound layer contains: one or more first compounds that include at least one cyclic structure selected from the group consisting of cyclic structures represented by formula (11) and formula (12); and one or more second compounds selected from the group consisting of compounds M21 represented by formula (21) and compounds M22 represented by formula (22).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an organic compound layer, an organic electroluminescence element, and an electronic device. [Background technology]

[0002] When a voltage is applied to an organic electroluminescence device (hereinafter sometimes referred to as an "organic EL device"), holes are injected from the anode into the light-emitting layer, and electrons are injected from the cathode into the light-emitting layer. Then, in the light-emitting layer, the injected holes and electrons recombine to form excitons. At this time, according to the statistical law of electron spin, singlet excitons are generated at a rate of 25% and triplet excitons are generated at a rate of 75%. Organic EL elements are applied to full-color displays of mobile phones, televisions, etc. In order to improve the performance of organic EL elements, various studies have been conducted on compounds used in organic EL elements (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3). Examples of the performance of organic EL elements include brightness, emission wavelength, chromaticity, luminous efficiency, driving voltage, and lifespan. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] US Patent Application Publication No. 2022 / 0194883 [Patent Document 2] European Patent Application Publication No. 4207995 [Patent Document 3] US Patent Application Publication No. 2023 / 0217674 Summary of the Invention [Problem to be solved by the invention]

[0004] In electronic devices equipped with multiple organic electroluminescence elements, crosstalk occurring between the organic EL elements can become a problem. When crosstalk occurs, for example, not only the organic EL element (pixel) intended to emit light but also unintended surrounding organic EL elements (pixels) may emit light. Thus, in addition to the demand for improving the performance of the organic EL element itself, there is also a demand for suppressing problems such as crosstalk occurring between multiple elements.

[0005] An object of the present invention is to provide an organic compound layer capable of suppressing the occurrence of crosstalk, to provide an organic electroluminescence element including the organic compound layer, and to provide an electronic device equipped with the organic electroluminescence element. [Means for solving the problem]

[0006] According to one embodiment of the present invention, there is provided an organic compound layer, the organic compound layer including one or more first compounds and one or more second compounds, The first compound includes at least one ring structure selected from the group consisting of a first ring structure represented by the following formula (11) and a second ring structure represented by the following formula (12): the affinity of the first compound is less than 5.10 eV; The second compound is a compound selected from the group consisting of a compound M21 represented by the following formula (21) and a compound M22 represented by the following formula (22), The compound M21 is a monoamine compound, the lowest excited singlet energy of the compound M21 and the lowest excited singlet energy of the compound M22 are each independently 3.00 eV or more and 3.20 eV or less; the HOMO of the compound M21 and the HOMO of the compound M22 are each independently −5.70 eV or more and −5.35 eV or less; The molecular volume of the compound M21 and the molecular volume of the compound M22 are each independently 600 Å 3 Over 880Å3 is as follows: There is provided an organic compound layer, wherein the aspect ratio of the compound M21 and the aspect ratio of the compound M22 are each independently 1.00 or more and 1.55 or less.

[0007] [ka]

[0008] (The first ring structure is, in the molecule of the first compound, a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 50 ring carbon atoms, and fused with one or more rings selected from the group consisting of substituted or unsubstituted heterocycles having 5 to 50 ring atoms; In the formula (11), =X 10 The structure represented by the formula (11a), (11b), (11c), (11d), (11e), (11f), (11g), (11h), (11i), (11j), (11k) or (11m) is represented by the following formula:

[0009] [ka]

[0010] [ka]

[0011] [ka]

[0012] [ka]

[0013] (In the formula (11a), (11b), (11c), (11d), (11e), (11f), (11g), (11h), (11i), (11j), (11k), or (11m), R 11~R 14 and R 111 ~R 120 are each independently, hydrogen atoms, halogen atoms, hydroxy groups, cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted halogenated alkyl group having 1 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 aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. (In the formula (12), X1, X2, X3, X4, and X5 each independently represent nitrogen atom, R 15 a carbon atom bonded to a carbon atom bonded to another atom in the molecule of the first compound, at least one of X1, X2, X3, X4, and X5 is a carbon atom bonded to another atom in the molecule of the first compound; R 15 teeth, hydrogen atoms, halogen atoms, cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted halogenated 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; a substituted or unsubstituted heterocyclic group having 5 to 50 ring 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 alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; carboxyl group, a substituted or unsubstituted ester group, a substituted or unsubstituted carbamoyl group, a nitro group, and is selected from the group consisting of substituted or unsubstituted siloxanyl groups; R 15 If there are multiple R 15 are either identical or different.) (In the first compound, 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 a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are multiple R 901 are identical to or different from each other, R 902 If there are multiple R 902 are identical to or different from each other, R 903 If there are multiple R 903are identical to or different from each other, R 904 If there are multiple R 904 are identical to or different from each other, R 905 If there are multiple R 905 are identical to or different from each other, R 906 If there are multiple R 906 are identical to or different from each other, R 907 If there are multiple R 907 are either identical or different.)

[0014] [ka]

[0015] (In the formulas (21) and (22), L A1 , L B1 , L C1 , L A2 , L B2 , L C2 and L D2 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, n2 is 1, 2, 3 or 4; If n2 is 1, L E2 teeth, 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, When n2 is 2, 3, or 4, multiple L E2 are identical to or different from each other, When n2 is 2, 3, or 4, multiple L E2 teeth, they combine together to form a substituted or unsubstituted monocyclic ring, or bonded to each other to form a substituted or unsubstituted fused ring, or Not bonded to each other, L does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. E2 teeth, 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, A1, B1, C1, A2, B2, C2 and D2 are each independently 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 -Si(R 291 )(R 292 )(R 293 ) and R 291 , R 292 and R 293 each independently represents a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, R 291 If there are multiple R 291 are identical to or different from each other, R 292 If there are multiple R 292 are identical to or different from each other, R 293 If there are multiple R 293 are identical to or different from each other, However, n2 in the formula (22) is 2, and two L E2 When is a substituted or unsubstituted phenylene group, the first amino group represented by the following formula (22A) in the formula (22) and the second amino group represented by the following formula (22B) are different groups.

[0016] [ka]

[0017] (* in the formula (22A) and formula (22B) represents L E2 )

[0018] According to one aspect of the present invention, there is provided an organic electroluminescence element comprising a cathode, an anode, and an organic layer between the cathode and the anode, the organic layer including one or more layers, at least one of the layers included in the organic layer being a first organic compound layer, and the first organic compound layer being the organic compound layer according to one aspect of the present invention.

[0019] 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. [Effects of the Invention]

[0020] According to one embodiment of the present invention, an organic compound layer capable of suppressing crosstalk can be provided. Furthermore, according to another embodiment of the present invention, an organic electroluminescence element including the organic compound layer can be provided. Furthermore, according to another embodiment of the present invention, an electronic device including the organic electroluminescence element can be provided. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 10 is a diagram showing a schematic configuration of an example of an element according to a second embodiment. [Figure 2] FIG. 10 is a diagram showing a schematic configuration of another example of the element according to the second embodiment. [Figure 3] FIG. 2 is a schematic plan view showing a substrate having comb-shaped electrodes used in the fabrication of an element according to an example. [Figure 4] FIG. 1 is a schematic cross-sectional view of an element according to an example. DETAILED DESCRIPTION OF THE INVENTION

[0022] [Definition] In this specification, hydrogen atoms include isotopes with different numbers of neutrons, namely protium, deuterium, and tritium.

[0023] In this 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 marked with a symbol such as "R" or "D" representing a deuterium atom.

[0024] As used herein, the term "number of ring carbon atoms" refers to 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 (e.g., 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 atoms contained in the substituent are 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. Furthermore, when a benzene ring is substituted with, for example, an alkyl group as a substituent, the number of carbon atoms 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. Furthermore, when a naphthalene ring is substituted with, for example, an alkyl group as a substituent, the number of carbon atoms 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.

[0025] 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 ring, a fused ring, and a ring assembly). Atoms that do not constitute the ring (e.g., hydrogen atoms terminating the bonds of atoms constituting the ring) and atoms contained in the substituent when the ring is substituted with a substituent are not included in the number of ring atoms. 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 the pyridine ring are 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. Furthermore, for example, hydrogen atoms bonded to carbon atoms of the quinazoline ring or atoms constituting substituents are not included in the number of ring atoms of the quinazoline ring, so the number of ring atoms of a quinazoline ring to which a hydrogen atom or a substituent is bonded is 10.

[0026] In this specification, the "number of carbon atoms XX to YY" in the expression "substituted or unsubstituted ZZ group having carbon atoms XX to YY" refers to 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.

[0027] In this specification, the "number of atoms XX to YY" in the expression "a substituted or unsubstituted ZZ group having XX to YY atoms" refers to 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.

[0028] In this specification, an unsubstituted ZZ group refers to a case where a "substituted or unsubstituted ZZ group" is an "unsubstituted ZZ group", and a substituted ZZ group refers to a case where a "substituted or unsubstituted ZZ group" is a "substituted ZZ group". In this specification, "unsubstituted" in the context 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 protist atom, a deuterium atom, or a tritium atom. In this specification, "substituted" in the context 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 context 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.

[0029] "Substituents described herein" The substituents described in this specification will be explained below.

[0030] The "unsubstituted aryl group" described in this specification has 6 to 50 ring carbon atoms, preferably 6 to 30 ring carbon atoms, 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 ring atoms, 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. 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, 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. 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 ring carbon atoms, 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 ring atoms, 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.

[0031] "Substituted or unsubstituted aryl group" 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 term "unsubstituted aryl group" refers to the case where the "substituted or unsubstituted aryl group" is an "unsubstituted aryl group," and the term "substituted aryl group" refers to the case where the "substituted or unsubstituted aryl group" is a "substituted aryl group.") In this specification, the term "aryl group" simply refers to both an "unsubstituted aryl group" and a "substituted aryl group." A "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 groups in which one or more hydrogen atoms of the "unsubstituted aryl group" are replaced with a substituent, and examples of the substituted aryl group in the specific example group G1A 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 groups in which a hydrogen atom bonded to a carbon atom of the aryl group itself in the "substituted aryl group" in the specific example group G1B below is further replaced with a substituent, and groups in which a hydrogen atom of a substituent in the "substituted aryl group" in the specific example group G1B below is further replaced with a substituent.

[0032] 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, phenanthryl group, benzophenanthryl group, phenalenyl group, pyrenyl group, chrysenyl group, benzochrysenyl group, a triphenylenyl group, benzotriphenylenyl group, tetracenyl group, pentacenyl group, fluorenyl groups, 9,9'-spirobifluorenyl group, benzofluorenyl groups, dibenzofluorenyl groups, 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 formulae (TEMP-1) to (TEMP-15).

[0033] [ka]

[0034] [ka]

[0035] 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 groups, triphenylsilylphenyl group, trimethylsilylphenyl group, phenylnaphthyl group, naphthylphenyl groups, 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.

[0036] "Substituted or unsubstituted heterocyclic group" The "heterocyclic group" described herein is a cyclic group containing at least one heteroatom among the ring-forming atoms. 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, the term "heterocyclic group" simply includes both an "unsubstituted heterocyclic group" and a "substituted heterocyclic group." A "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 a hydrogen atom of the "unsubstituted heterocyclic group" in the specific example group G2A below is replaced, and the examples of the substituted heterocyclic group in the specific example group G2B below are also included. The examples of the "unsubstituted heterocyclic group" and the "substituted heterocyclic group" listed here are merely examples, and the "substituted heterocyclic group" described in this specification also includes groups in which a hydrogen atom bonded to a ring-forming atom of the heterocyclic group itself in the "substituted heterocyclic group" in the specific example group G2B is further replaced with a substituent, and groups in which a hydrogen atom of a substituent in the "substituted heterocyclic group" in the specific example group G2B is further replaced with a substituent.

[0037] 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).

[0038] Specific example group G2B includes, for example, the following substituted heterocyclic groups containing a nitrogen atom (specific example group G2B1), substituted heterocyclic groups containing an oxygen atom (specific example group G2B2), substituted heterocyclic groups containing a sulfur atom (specific example group G2B3), and groups in which one or more hydrogen atoms of a monovalent heterocyclic group derived from a ring structure represented by the following general formulae (TEMP-16) to (TEMP-33) are replaced with a substituent (specific example group G2B4).

[0039] Unsubstituted heterocyclic groups containing a nitrogen atom (specific example group G2A1): pyrrolyl group, imidazolyl group, pyrazolyl group, a triazolyl group, tetrazolyl group, an oxazolyl group, an isoxazolyl group, an oxadiazolyl group, a thiazolyl group, isothiazolyl group, a thiadiazolyl group, pyridyl group, pyridazinyl group, pyrimidinyl group, pyrazinyl group, a triazinyl group, Indolyl groups, isoindolyl groups, an indolizinyl group, a quinolidinyl group, quinolyl group, isoquinolyl group, cinnolyl group, phthalazinyl group, a quinazolinyl group, quinoxalinyl group, benzimidazolyl group, an indazolyl group, a phenanthrolinyl group, a phenanthridinyl group, acridinyl group, phenazinyl group, a carbazolyl group, a benzocarbazolyl group, morpholino group, phenoxazinyl group, a phenothiazinyl group, Azacarbazolyl group and diazacarbazolyl group.

[0040] Unsubstituted heterocyclic groups containing an oxygen atom (specific example group G2A2): furyl group, an oxazolyl group, an isoxazolyl group, an oxadiazolyl group, xanthenyl group, benzofuranyl group, isobenzofuranyl group, dibenzofuranyl group, naphthobenzofuranyl group, benzoxazolyl groups, benzoisoxazolyl group, phenoxazinyl group, morpholino group, a dinaphthofuranyl group, azadibenzofuranyl group, diazadibenzofuranyl group, an azanaphthobenzofuranyl group, and Diazanaphthobenzofuranyl group.

[0041] 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, benzoisothiazolyl group, a phenothiazinyl group, Dinaphthothiophenyl group (dinaphthothienyl group), Azadibenzothiophenyl group (azadibenzothienyl group), diazadibenzothiophenyl group (diazadibenzothienyl group), Azanaphthobenzothiophenyl group (azanaphthobenzothienyl group), and Diazanaphthobenzothiophenyl group (diazanaphthobenzothienyl group).

[0042] 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):

[0043] [ka]

[0044] [ka]

[0045] In the general formulae (TEMP-16) to (TEMP-33), X A and Y A are each independently an oxygen atom, a sulfur atom, NH, or CH2. 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 When at least one of is NH or CH2, the monovalent heterocyclic group derived from the ring structure represented by the general formulae (TEMP-16) to (TEMP-33) includes a monovalent group obtained by removing one hydrogen atom from NH or CH2.

[0046] Substituted heterocyclic groups containing a nitrogen atom (specific example group G2B1): a (9-phenyl)carbazolyl group, a (9-biphenylyl)carbazolyl group, a (9-phenyl)phenylcarbazolyl group, a (9-naphthyl)carbazolyl group, diphenylcarbazol-9-yl group, phenylcarbazol-9-yl group, methylbenzimidazolyl group, ethylbenzimidazolyl group, phenyltriazinyl group, biphenylyltriazinyl group, diphenyltriazinyl group, phenylquinazolinyl group, and Biphenylylquinazolinyl group.

[0047] 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].

[0048] 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].

[0049] 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):

[0050] The above-mentioned "one or more hydrogen atoms of a monovalent heterocyclic group" means one or more hydrogen atoms selected from a hydrogen atom bonded to a ring-forming carbon atom of the monovalent heterocyclic group, a hydrogen atom bonded to a nitrogen atom when at least one of XA and YA is NH, and a hydrogen atom of a methylene group when one of XA and YA is CH.

[0051] "Substituted or unsubstituted alkyl groups" Specific examples (specific example group G3) of the "substituted or unsubstituted alkyl group" described herein 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 simply referring to an "alkyl group," both an "unsubstituted alkyl group" and a "substituted alkyl group" are included. The term "substituted alkyl group" refers to an "unsubstituted alkyl group" in which one or more hydrogen atoms have been 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 have been replaced with a substituent, and the 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 linear "unsubstituted alkyl group" and a branched "unsubstituted alkyl group." Note that the examples of the "unsubstituted alkyl group" and 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 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 specific example group G3B is further replaced with a substituent.

[0052] 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.

[0053] Substituted alkyl groups (specific example group G3B): heptafluoropropyl group (including isomers), pentafluoroethyl group, 2,2,2-trifluoroethyl group, and Trifluoromethyl group.

[0054] "Substituted or unsubstituted alkenyl group" Specific examples (specific example group G4) of the "substituted or unsubstituted alkenyl group" described herein include the following unsubstituted alkenyl group (specific example group G4A) and substituted alkenyl group (specific example group G4B). (Here, the term "unsubstituted alkenyl group" refers to the case where the "substituted or unsubstituted alkenyl group" is an "unsubstituted alkenyl group," and the term "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." A "substituted alkenyl group" refers to an "unsubstituted alkenyl group" in which one or more hydrogen atoms have been replaced with a substituent. Specific examples of the "substituted alkenyl group" include the following "unsubstituted alkenyl groups" (specific example group G4A) having a substituent, and the examples of substituted alkenyl groups (specific example group G4B). The examples of "unsubstituted alkenyl groups" and "substituted alkenyl groups" listed here are merely examples, and the "substituted alkenyl group" described in this specification also includes groups in the "substituted alkenyl groups" of specific example group G4B in which a hydrogen atom of the alkenyl group itself has been further replaced with a substituent, and groups in the "substituted alkenyl groups" of specific example group G4B in which a hydrogen atom of a substituent has been further replaced with a substituent.

[0055] Unsubstituted alkenyl groups (specific example group G4A): vinyl groups, Allyl groups, a 1-butenyl group, 2-butenyl group, and 3-butenyl group.

[0056] Substituted alkenyl groups (specific example group G4B): 1,3-butadienyl group, 1-methylvinyl group, 1-methylallyl group, 1,1-dimethylallyl group, 2-methylallyl group, and 1,2-dimethylallyl group.

[0057] "Substituted or unsubstituted alkynyl group" 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 a 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." A "substituted alkynyl group" means a group in which one or more hydrogen atoms in an "unsubstituted alkynyl group" are replaced with substituents. Specific examples of the "substituted alkynyl group" include groups in which one or more hydrogen atoms in the following "unsubstituted alkynyl group" (specific example group G5A) are replaced with substituents, etc.

[0058] Unsubstituted alkynyl groups (specific example group G5A): Ethynyl group.

[0059] "Substituted or unsubstituted cycloalkyl groups" Specific examples (specific example group G6) of the "substituted or unsubstituted cycloalkyl group" described herein 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." A "substituted cycloalkyl group" refers to an "unsubstituted cycloalkyl group" in which one or more hydrogen atoms have been 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 have been replaced with a substituent, and the examples of the substituted cycloalkyl group (specific example group G6B). The examples of "unsubstituted cycloalkyl groups" and "substituted cycloalkyl groups" listed here are merely examples, and the "substituted cycloalkyl group" described in this specification also includes a group in the "substituted cycloalkyl group" of specific example group G6B in which one or more hydrogen atoms bonded to a carbon atom of the cycloalkyl group itself have been replaced with a substituent, and a group in the "substituted cycloalkyl group" of specific example group G6B in which a hydrogen atom of a substituent has been further replaced with a substituent.

[0060] Unsubstituted cycloalkyl groups (specific example group G6A): a cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, 1-adamantyl group, 2-adamantyl group, 1-norbornyl group, and 2-norbornyl group.

[0061] Substituted cycloalkyl groups (specific example group G6B): 4-methylcyclohexyl group.

[0062] -Si(R 901 )(R 902 )(R 903 ) a group represented by -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 the 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) may be the same as or different from each other.

[0063] -O-(R 904 ) a group represented by -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 the specific example group G6.

[0064] -S-(R 905 ) a group represented by -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 the specific example group G6.

[0065] -N(R 906 )(R 907 ) a group represented by -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 the specific example group G6. -The multiple G1s in N(G1)(G1) are the same as or different from each other. The multiple G2's in -N(G2)(G2) are the same as or different from each other. -The multiple G3s in N(G3)(G3) are the same as or different from each other. The multiple G6s in -N(G6)(G6) are the same as or different from each other.

[0066] "Halogen atoms" Specific examples (specific example group G11) of the "halogen atom" described in this specification include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

[0067] "Substituted or unsubstituted fluoroalkyl groups" The term "substituted or unsubstituted fluoroalkyl group" as used herein refers to a group in which at least one hydrogen atom bonded to a carbon atom constituting the alkyl group in a "substituted or unsubstituted alkyl group" is replaced with a fluorine atom, and also includes a group in which all hydrogen atoms bonded to carbon atoms constituting the alkyl group in a "substituted or unsubstituted alkyl group" are replaced with fluorine atoms (perfluoro group). Unless otherwise specified herein, the number of carbon atoms in an "unsubstituted fluoroalkyl group" is 1 to 50, preferably 1 to 30, and more preferably 1 to 18. The term "substituted fluoroalkyl group" refers to a group in which one or more hydrogen atoms of a "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 of the alkyl chain in a "substituted fluoroalkyl group" are further replaced with a substituent, and a group in which one or more hydrogen atoms of the substituent in a "substituted fluoroalkyl group" are further replaced with a substituent. Specific examples of the "unsubstituted fluoroalkyl group" include the examples of the above-mentioned "alkyl group" (specific example group G3) in which one or more hydrogen atoms are replaced with a fluorine atom.

[0068] "Substituted or unsubstituted haloalkyl groups" The term "substituted or unsubstituted haloalkyl group" as used herein refers to a group in which at least one hydrogen atom bonded to a carbon atom constituting the alkyl group in a "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 a "substituted or unsubstituted alkyl group" are replaced with halogen atoms. The number of carbon atoms in an "unsubstituted haloalkyl group" is 1 to 50, preferably 1 to 30, and more preferably 1 to 18, unless otherwise specified herein. The term "substituted haloalkyl group" refers to a group in which one or more hydrogen atoms in a "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 a "substituted haloalkyl group" are further replaced with a substituent, and a group in which one or more hydrogen atoms of the substituent in a "substituted haloalkyl group" are further replaced with a substituent. Specific examples of "unsubstituted haloalkyl groups" include the examples of the above-mentioned "alkyl groups" (specific example group G3) in which one or more hydrogen atoms are replaced with halogen atoms. Haloalkyl groups are sometimes referred to as halogenated alkyl groups.

[0069] "Substituted or unsubstituted alkoxy group" A specific example of the "substituted or unsubstituted alkoxy group" described herein is a group represented by -O(G3), where G3 is a "substituted or unsubstituted alkyl group" described in specific example group G3. Unless otherwise specified herein, the "unsubstituted alkoxy group" has 1 to 50 carbon atoms, preferably 1 to 30 carbon atoms, and more preferably 1 to 18 carbon atoms.

[0070] "Substituted or unsubstituted alkylthio group" A specific example of the "substituted or unsubstituted alkylthio group" described herein is a group represented by -S(G3), where G3 is a "substituted or unsubstituted alkyl group" described in specific example group G3. Unless otherwise specified herein, the "unsubstituted alkylthio group" has 1 to 50 carbon atoms, preferably 1 to 30 carbon atoms, and more preferably 1 to 18 carbon atoms.

[0071] "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.

[0072] "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.

[0073] "Substituted or unsubstituted trialkylsilyl group" A specific example of the "trialkylsilyl group" described herein is a group represented by -Si(G3)(G3)(G3), where G3 is a "substituted or unsubstituted alkyl group" described in specific example group G3. The multiple G3s in -Si(G3)(G3)(G3) may be the same or different. Unless otherwise specified herein, 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.

[0074] "Substituted or unsubstituted aralkyl group" A specific example of the "substituted or unsubstituted aralkyl group" described herein 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, an "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 embodiment of a "substituted alkyl group." An "unsubstituted aralkyl group" is an "unsubstituted alkyl group" substituted with an "unsubstituted aryl group," and the number of carbon atoms in the "unsubstituted aralkyl group" is 7 to 50, preferably 7 to 30, and more preferably 7 to 18, unless otherwise specified herein. 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 groups.

[0075] 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, an 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, an m-terphenyl-4-yl group, an m-terphenyl-3-yl group, an 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, or the like.

[0076] Unless otherwise specified in the present specification, the substituted or unsubstituted heterocyclic group described herein 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 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.

[0077] In this specification, a carbazolyl group is specifically any of the following groups, unless otherwise specified in this specification.

[0078] [ka]

[0079] In this specification, unless otherwise specified in this specification, a (9-phenyl)carbazolyl group specifically means any of the following groups:

[0080] [ka]

[0081] In the general formulae (TEMP-Cz1) to (TEMP-Cz9), * represents a bonding position.

[0082] In this specification, a dibenzofuranyl group and a dibenzothiophenyl group are specifically any of the following groups, unless otherwise specified in this specification.

[0083] [ka]

[0084] In the general formulae (TEMP-34) to (TEMP-41), * represents a bonding position.

[0085] Unless otherwise specified herein, the substituted or unsubstituted alkyl groups described herein are preferably methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, t-butyl, and the like.

[0086] "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.

[0087] "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 (specific example group G13) of the "substituted or unsubstituted divalent heterocyclic group" 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.

[0088] "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.

[0089] Unless otherwise specified in the present specification, the substituted or unsubstituted arylene group described in the present specification is preferably any one of the groups represented by the following general formulae (TEMP-42) to (TEMP-68).

[0090] [ka]

[0091] [ka]

[0092] In the general formulae (TEMP-42) to (TEMP-52), Q1 to Q 10 are each independently a hydrogen atom or a substituent. In the general formulae (TEMP-42) to (TEMP-52), * represents a bonding position.

[0093] [ka]

[0094] In the general formulae (TEMP-53) to (TEMP-62), Q1 to Q 10 are each independently a hydrogen atom or a substituent. Equations Q9 and Q 10 may be bonded to each other via a single bond to form a ring. In the general formulae (TEMP-53) to (TEMP-62), * represents a bonding position.

[0095] [ka]

[0096] In the general formulae (TEMP-63) to (TEMP-68), Q1 to Q8 each independently represent a hydrogen atom or a substituent. In the general formulae (TEMP-63) to (TEMP-68), * represents a bonding position.

[0097] Unless otherwise specified in the present specification, the substituted or unsubstituted divalent heterocyclic group described in the present specification is preferably any one of the groups represented by the following general formulae (TEMP-69) to (TEMP-102).

[0098] [ka]

[0099] [ka]

[0100] [ka]

[0101] In the general formulae (TEMP-69) to (TEMP-82), Q1 to Q9 each independently represent a hydrogen atom or a substituent.

[0102] [ka]

[0103] [ka]

[0104] [ka]

[0105] [ka]

[0106] In the general formulae (TEMP-83) to (TEMP-102), Q1 to Q8 each independently represent a hydrogen atom or a substituent.

[0107] The above is the explanation of "substituents described in this specification."

[0108] - "When bonded to form a ring" In this specification, the phrase "one or more pairs of adjacent groups bond with each other to form a substituted or unsubstituted monocycle, bond with each other to form a substituted or unsubstituted fused ring, or are not bonded to each other" means the case where "one or more pairs of adjacent groups bond with each other to form a substituted or unsubstituted monocycle", the case where "one or more pairs of adjacent groups bond with each other to form a substituted or unsubstituted fused ring", or the case where "one or more pairs of adjacent groups do not bond with each other". In this specification, the cases where "one or more groups of two or more adjacent groups bond to each other to form a substituted or unsubstituted monocyclic ring" and "one or more groups of two or more adjacent groups bond to each other to form a substituted or unsubstituted fused ring" (hereinafter, these cases may be collectively referred to as "a case where they bond 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 main skeleton is an anthracene ring, will be explained as an example.

[0109] [ka]

[0110] For example, R921 ~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 Paired with R 922 and R 923 Paired with R 923 and R 924 Paired with R 924 and R 930 Paired with R 930 and R 925 Paired with R 925 and R 926 Paired with R 926 and R 927 Paired with R 927 and R 928 Paired with R 928 and R 929 Pairs with and R 929 and R 921 It is paired with.

[0111] 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 each other to form ring Q A At the same time, R 925 and R 926 and are bonded to each other to form ring Q B When the anthracene compound represented by the 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).

[0112] [ka]

[0113] When a "set of two or more adjacent units" forms a ring, it includes not only the case where a set of two adjacent units is bonded, as in the example above, 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 each other to form ring Q A and R 922 and R923 and are bonded to each other to form ring Q C and form 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): A and Ring Q C is R 922 Share.

[0114] [ka]

[0115] The "monocyclic ring" or "fused ring" formed may be a saturated ring or an unsaturated ring as the structure of only the ring formed. Even when "one pair of adjacent two" forms a "monocyclic ring" or a "fused ring", the "monocyclic ring" or the "fused ring" may form a saturated ring or an unsaturated ring. For example, in the case of the ring Q formed in the general formula (TEMP-104), A and Ring Q B are "monocyclic rings" or "fused rings", respectively. A , and ring Q C is a "fused ring". A and Tamaki Q C That is, Tamaki Q A and Tamaki Q C The ring Q in the general formula (TMEP-104) is fused to form a fused ring. A If 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.

[0116] 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 "forming a ring" means that a ring is formed only with a plurality of atoms of the main skeleton, or with a plurality of atoms of the main skeleton and one or more optional elements. For example, R 921 and R 922 and are bonded 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 a monocyclic unsaturated ring is formed with the carbon atom of the anthracene skeleton to which R is bonded and four carbon atoms, 921 and R 922 The ring formed by

[0117] Here, unless otherwise specified in this 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 carbon or nitrogen), the 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 carbon is included, the formed ring is a heterocycle. Unless otherwise specified in this specification, the "one or more arbitrary elements" constituting the monocyclic or fused 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 "fused 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 herein, a "monocyclic ring" is preferably a benzene ring. Unless otherwise specified herein, the "unsaturated ring" is preferably a benzene ring. When "one or more pairs of adjacent two or more groups" "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 pairs of adjacent two or more groups 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 atoms, nitrogen atoms, oxygen atoms, and sulfur atoms.

[0118] When the above-mentioned "monocyclic ring" or "fused ring" has a substituent, the substituent is, for example, the "optional substituent" described later. When the above-mentioned "monocyclic ring" or "fused ring" has a substituent, specific examples of the substituent are the substituents described in the above 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 "fused 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 to each other to form a substituted or unsubstituted monocyclic ring" and the case where "one or more pairs of adjacent groups bond to each other to form a substituted or unsubstituted fused ring" ("when bonded to form a ring").

[0119] Substituents in "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) includes, 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, a group selected from the group consisting of where 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 to or different from each other, R 902 If there are two or more, there are two or more R 902 are identical to or different from each other, R903 If there are two or more, there are two or more R 903 are identical to or different from each other, R 904 If there are two or more, there are two or more R 904 are identical to or different from each other, R 905 If there are two or more, there are two or more R 905 are identical to or different from each other, R 906 If there are two or more, there are two or more R 906 are identical to 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.

[0120] In one embodiment, the substituents in the "substituted or unsubstituted" are: 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:

[0121] In one embodiment, the substituents in the "substituted or unsubstituted" are: 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:

[0122] 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."

[0123] Unless otherwise specified in this specification, any adjacent substituents may be bonded to 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 this specification, any optional substituent may further have a substituent. The substituent that the optional substituent further has is the same as the optional substituent described above.

[0124] In this specification, a numerical range expressed using "AA to BB" means a range that includes 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.

[0125] First Embodiment <Organic compound layer> The first embodiment relates to an organic compound layer. The organic compound layer according to the first embodiment contains one or more first compounds and one or more second compounds. the first compound includes at least one ring structure selected from the group consisting of a first ring structure represented by the following formula (11) and a second ring structure represented by the following formula (12), the affinity of the first compound is less than 5.10 eV, the second compound is a compound selected from the group consisting of a compound M21 represented by the following formula (21) and a compound M22 represented by the following formula (22), the compound M21 is a monoamine compound, the lowest excited singlet energy of the compound M21 and the lowest excited singlet energy of the compound M22 are each independently 3.00 eV or more and 3.20 eV or less, the HOMO of the compound M21 and the HOMO of the compound M22 are each independently −5.70 eV or more and −5.35 eV or less, and the molecular volume of the compound M21 and the molecular volume of the compound M22 are each independently 600 Å or more. 3 Over 880Å 3The aspect ratio of the compound M21 and the aspect ratio of the compound M22 are each independently 1.00 or more and 1.55 or less.

[0126] <First compound> (Affinity) In the organic compound layer according to the first embodiment, the affinity of the first compound is less than 5.10 eV, preferably 5.08 eV or less, more preferably 5.06 eV or less, and even more preferably 5.05 eV or less.

[0127] In the organic compound layer according to the first embodiment, the affinity of the first compound is preferably, for example, 3.80 eV or more, 3.90 eV or more, or 4.00 eV or more.

[0128] In the organic compound layer according to the first embodiment, the first compound includes at least one ring structure selected from the group consisting of a first ring structure represented by the following formula (11) and a second ring structure represented by the following formula (12):

[0129] [ka]

[0130] (The first ring structure is, in the molecule of the first compound, a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 50 ring carbon atoms, and fused with one or more rings selected from the group consisting of substituted or unsubstituted heterocycles having 5 to 50 ring atoms; In the formula (11), =X 10 The structure represented by the formula (11a), (11b), (11c), (11d), (11e), (11f), (11g), (11h), (11i), (11j), (11k) or (11m) is represented by the following formula:

[0131] [ka]

[0132] [ka]

[0133] [ka]

[0134] [ka]

[0135] (In the formula (11a), (11b), (11c), (11d), (11e), (11f), (11g), (11h), (11i), (11j), (11k), or (11m), R 11 ~R 14 and R 111 ~R 120 are each independently, hydrogen atoms, halogen atoms, hydroxy groups, cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted halogenated alkyl group having 1 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 aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. (In the formula (12), X1, X2, X3, X4, and X5 each independently represent nitrogen atom, R 15 a carbon atom bonded to a carbon atom bonded to another atom in the molecule of the first compound, at least one of X1, X2, X3, X4, and X5 is a carbon atom bonded to another atom in the molecule of the first compound; R 15 teeth, hydrogen atoms, halogen atoms, cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted halogenated 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; a substituted or unsubstituted heterocyclic group having 5 to 50 ring 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 alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; carboxyl group, a substituted or unsubstituted ester group, a substituted or unsubstituted carbamoyl group, a nitro group, and is selected from the group consisting of substituted or unsubstituted siloxanyl groups; R 15 If there are multiple R 15 are either identical or different.) (In the first compound, 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 a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are multiple R 901 are identical to or different from each other, R 902 If there are multiple R 902 are identical to or different from each other, R 903 If there are multiple R 903 are identical to or different from each other, R 904 If there are multiple R 904 are identical to or different from each other, R 905 If there are multiple R 905 are identical to or different from each other, R 906 If there are multiple R 906 are identical to or different from each other, R 907 If there are multiple R 907 are either identical or different.)

[0136] In the organic compound layer according to the first embodiment, the first compound preferably contains at least one ring structure represented by the following formula (11A) as the first ring structure. The ring structure represented by the following formula (11A) is the ring structure represented by =X in the formula (11). 10corresponds to the ring structure in the case where the structure is represented by the formula (11a). When the first compound contains at least one ring structure represented by the following formula (11A), the affinity of the first compound can be easily reduced (the affinity of the first compound can be easily shallowed).

[0137] [ka]

[0138] In the organic compound layer according to the first embodiment, the first compound is preferably a compound represented by the following formula (110).

[0139] [ka]

[0140] (In the formula (110), Ac1 and Ac2 each independently represent a partial structure containing the first ring structure, The partial structure Ac1 and the partial structure Ac2 are the same or different from each other, R 101 and R 102 are each independently a hydrogen atom, a halogen atom, or a cyano group.

[0141] In the organic compound layer according to the first embodiment, the partial structure Ac1 is preferably represented by the following formula (111), and the partial structure Ac2 is preferably represented by the following formula (112).

[0142] [ka]

[0143] (In the formulas (111) and (112), X 11 and X 12 are each independently X in the formula (11). 10 is synonymous with Y 11 , Y 12, R 103 and R 104 are each independently, hydrogen atoms, halogen atoms, hydroxy groups, cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted halogenated alkyl group having 1 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 aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, X 11 and X 12 and are the same or different from each other, Y 11 and Y 12 and are the same or different from each other, R 103 and R 104 and are the same or different from each other, a in the formula (111) represents the condensation position of the partial structure Ac1, and b in the formula (112) represents the condensation position of the partial structure Ac2.

[0144] In the organic compound layer according to the first embodiment, it is also preferable that the partial structure Ac1 is represented by the following formula (131), and the partial structure Ac2 is represented by the following formula (132).

[0145] [ka]

[0146] (In the formulas (131) and (132), X 11 and X 12 are each independently X in the formula (11). 10 is synonymous with Y 11 , Y 12 , R 131 , R 132 , R 133 , R 134 , R 135 and R 136 are each independently, hydrogen atoms, halogen atoms, hydroxy groups, cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted halogenated alkyl group having 1 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 aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, X 11 and X 12 and are the same or different from each other, Y 11 and Y 12 and are the same or different from each other, R 131 and R 136 and are the same or different from each other, R 132 and R 135 and are the same or different from each other, R 133 and R 134 and are the same or different from each other, a in the formula (131) represents the condensation position of the partial structure Ac1, and b in the formula (132) represents the condensation position of the partial structure Ac2.

[0147] In the organic compound layer according to the first embodiment, the partial structure Ac1 and the partial structure Ac2 are preferably different from each other.

[0148] In the organic compound layer according to the first embodiment, the first compound is preferably a compound represented by the following formula (113).

[0149] [ka]

[0150] (In the formula (113), X 11 and X 12 are each independently X in the formula (11). 10 is synonymous with R 101 and R 102 are R in the formula (110), respectively. 101 and R 102 is synonymous with Y 11 , Y 12 , R 103 , R 104 , a and b are the Y in the formula (111) or (112), respectively. 11 , Y 12 , R 103 , R 104 , a and b; X 11 and X 12 and are the same or different from each other, Y 11 and Y 12 and are the same or different from each other, R 103 and R 104and are the same or different.)

[0151] In the organic compound layer according to the first embodiment, the first compound is preferably a compound represented by the following formula (114).

[0152] [ka]

[0153] (In the formula (114), R 101 and R 102 are each independently a hydrogen atom, a halogen atom, or a cyano group, Y 11 , Y 12 , R 103 and R 104 are each independently, hydrogen atoms, halogen atoms, hydroxy groups, cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted halogenated alkyl group having 1 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 aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, Y 11 and Y 12 and are the same or different from each other, R 103 and R104 and are the same or different.)

[0154] In the organic compound layer according to the first embodiment, the first compound is also preferably a compound represented by the following formula (133).

[0155] [ka]

[0156] (In the formula (133), X 11 and X 12 are each independently X in the formula (11). 10 is synonymous with R 101 and R 102 are R in the formula (110), respectively. 101 and R 102 is synonymous with Y 11 , Y 12 , R 131 , R 132 , R 133 , R 134 , R 135 , R 136 , a and b are the Y in the formula (131) or (132), respectively. 11 , Y 12 , R 131 , R 132 , R 133 , R 134 , R 135 , R 136 , a and b; X 11 and X 12 and are the same or different from each other, Y 11 and Y 12 and are the same or different from each other, R 131 and R 136 and are the same or different from each other, R 132 and R 135 and are the same or different from each other, R 133 and R 134 and are the same or different.)

[0157] In the organic compound layer according to the first embodiment, the first compound is also preferably a compound represented by the following formula (133B).

[0158] [ka]

[0159] (In the formula (133B), R 101 and R 102 are R in the formula (110), respectively. 101 and R 102 is synonymous with Y 11 , Y 12 , R 131 , R 132 , R 133 , R 134 , R 135 and R 136 are the Y in the formula (131) or (132), respectively. 11 , Y 12 , R 131 , R 132 , R 133 , R 134 , R 135 and R 136 is synonymous with Y 11 and Y 12 and are the same or different, and R 131 and R 136 and are the same or different, and R 132 and R 135 and are the same or different, and R 133 and R 134 and are the same or different.)

[0160] In the organic compound layer according to the first embodiment, Y 11 is a group represented by the following formula (115), and Y 12is preferably a group represented by the following formula (116).

[0161] [ka]

[0162] (R in the formula (115) 161 , R 162 , R 163 , R 164 and R 165 and R in the formula (116) 166 , R 167 , R 168 , R 169 and R 170 each independently represents a hydrogen atom, a halogen atom, a hydroxy group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted halogenated alkyl group having 1 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 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, where * indicates the bonding position.

[0163] In the organic compound layer according to the first embodiment, the first compound is preferably a compound represented by the following formula (117).

[0164] [ka]

[0165] (In the formula (117), X 11 and X 12 are each independently X in the formula (11). 10is synonymous with R 101 and R 102 are R in the formula (110), respectively. 101 and R 102 is synonymous with R 103 and R 104 are R in the formula (111) or (112), respectively. 103 and R 104 is synonymous with R 161 , R 162 , R 163 , R 164 and R 165 are R in the formula (115), respectively. 161 , R 162 , R 163 , R 164 and R 165 is synonymous with R 166 , R 167 , R 168 , R 169 and R 170 are R in the formula (116), respectively. 166 , R 167 , R 168 , R 169 and R 170 is synonymous with X 11 and X 12 and are the same or different from each other, R 103 and R 104 and are the same or different.)

[0166] In the organic compound layer according to the first embodiment, R 161 and R 165 and R 166 and R 170 and the pair are identical or different, and R 162 and R 164 and R 167 and R 169 and the set of R 163 and R 168 and are the same or different from each other.

[0167] In the organic compound layer according to the first embodiment, the first compound is —O—(R 904 ) group, -O-(R 904 ) in the group represented by 904 is preferably a substituted alkyl group having 1 to 50 carbon atoms, more preferably an alkyl group having 1 to 50 carbon atoms substituted with a halogen atom (a halogenated alkyl group having 1 to 50 carbon atoms), and more preferably an alkyl group having 1 to 50 carbon atoms substituted with a fluorine atom (a fluoroalkyl group having 1 to 50 carbon atoms), and the R 904 The substituted alkyl group as is preferably a substituted alkyl group having 1 to 20 carbon atoms, more preferably a substituted alkyl group having 1 to 10 carbon atoms, and even more preferably a substituted alkyl group having 1 to 6 carbon atoms.

[0168] In the organic compound layer according to the first embodiment, the first compound is preferably a condensed compound formed by condensing two or three structures represented by the following formula (13) to a third ring structure selected from a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 50 ring carbon atoms and a substituted or unsubstituted heterocycle having 5 to 50 ring atoms:

[0169] [ka]

[0170] (In the formula (13), Ac3 is a ring structure fused to the third ring structure and is represented by the formula (11), Xa and Xb each independently represent C(R 16 ) or nitrogen atom, and multiple R 16 are identical to or different from each other, R 16 , R 17 and R 18each independently represents a hydrogen atom, a halogen atom, a hydroxy group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted halogenated alkyl group having 1 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 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.

[0171] In the organic compound layer according to the first embodiment, the first compound is preferably a compound represented by the following formula (14) or (15).

[0172] [ka]

[0173] [ka]

[0174] (In the formulas (14) and (15), Ar1 is a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 50 ring carbon atoms or a substituted or unsubstituted heterocyclic ring having 5 to 50 ring atoms, a1, a2, and a3 each independently represent a ring structure represented by the formula (11), X 13 , X 14 , X 15 , X 16 , X 17 and X 18 each independently represents the same as Xa and Xb in formula (13), R 141 , R 142 , R 143 , R144 , R 145 and R 146 are each independently R in the formula (13). 17 and R 18 is equivalent to

[0175] In the organic compound layer according to the first embodiment, Ar1 in the formulas (14) and (15) is preferably a substituted or unsubstituted benzene ring or a substituted or unsubstituted heterocycle having 6 ring atoms.

[0176] In the organic compound layer according to the first embodiment, the first compound is preferably represented by the following formula (14A) or formula (15A).

[0177] [ka]

[0178] [ka]

[0179] (In the formula (14A) and formula (15A), a1, a2, and a3 each independently represent a ring structure represented by the formula (11), X 13 , X 14 , X 15 , X 16 , X 17 and X 18 each independently represents the same as Xa and Xb in formula (13), R 141 , R 142 , R 143 , R 144 , R 145 and R 146 are each independently R in the formula (13). 17 and R 18 is synonymous with. In the formula (14A), Z 11 and Z 12are each independently CH or a nitrogen atom.

[0180] In the organic compound layer according to the first embodiment, R 17 and R 18 At least one of these is preferably a fluorine atom, a fluoroalkyl group, a fluoroalkoxy group, or a cyano group.

[0181] In the organic compound layer according to the first embodiment, the first compound is preferably a compound represented by any one of the following formulas (141) to (144) and (151).

[0182] [ka]

[0183] [ka]

[0184] (In the formulas (141) to (144) and (151), R 141 , R 143 , R 144 and R 146 are each independently a fluorine atom, a fluoroalkyl group, a fluoroalkoxy group, or a cyano group.

[0185] In the organic compound layer according to the first embodiment, the first compound is also preferably a compound represented by the formula (143).

[0186] In the organic compound layer according to the first embodiment, the first compound is also preferably a compound represented by any one of the following formulas (145) to (148) and (152).

[0187] [ka]

[0188] [ka]

[0189] (In the formulas (145) to (148) and (152), Ar 141 , Ar 143 , Ar 144 and Ar 146 are each independently, an aromatic hydrocarbon group having 6 to 30 ring carbon atoms and having at least one substituent selected from the group consisting of a fluorine atom, a fluoroalkyl group, a fluoroalkoxy group, and a cyano group, or It is a heterocyclic group having 5 to 30 ring atoms and having at least one substituent selected from the group consisting of a fluorine atom, a fluoroalkyl group, a fluoroalkoxy group, and a cyano group.

[0190] In the organic compound layer according to the first embodiment, the first compound is also preferably a compound represented by any one of the following formulas (1451), (1461), (1471), and (1481).

[0191] [ka]

[0192] [ka]

[0193] [ka]

[0194] [ka]

[0195] (R in the formula (1451) 1451 ~R 1460 , R in the formula (1461) 1461 ~R 1470, R in the formula (1471) 1471 ~R 1480 and R in the formula (1481) 1481 ~R 1490 each independently represents a hydrogen atom, a fluorine atom, a fluoroalkyl group, a fluoroalkoxy group, or a cyano group, R 1451 ~R 1460 one or more of which is a fluorine atom, a fluoroalkyl group, a fluoroalkoxy group, or a cyano group, R 1461 ~R 1470 one or more of which is a fluorine atom, a fluoroalkyl group, a fluoroalkoxy group, or a cyano group, R 1471 ~R 1480 one or more of which is a fluorine atom, a fluoroalkyl group, a fluoroalkoxy group, or a cyano group, R 1481 ~R 1490 At least one of them is a fluorine atom, a fluoroalkyl group, a fluoroalkoxy group, or a cyano group.

[0196] In the organic compound layer according to the first embodiment, the first compound is also preferably a compound represented by the above formula (1451).

[0197] In the organic compound layer according to the first embodiment, the first compound is also preferably a compound represented by the above formula (1461).

[0198] In the organic compound layer according to the first embodiment, the first compound is also preferably a compound represented by the following formula (16) or (17).

[0199] [ka]

[0200] [ka]

[0201] (In the formulas (16) and (17), X 13 , X 14 , X 15 and X 16 each independently represents the same as Xa and Xb in formula (13), R 141 , R 142 , R 143 and R 144 are each independently R in the formula (13). 17 and R 18 is synonymous with a1 and a2 each independently represent a ring structure represented by the formula (11), b1 is a ring structure represented by the following formula (17A):

[0202] [ka]

[0203] (In the formula (17A), X 19 is a sulfur atom or an oxygen atom.

[0204] In the organic compound layer according to the first embodiment, a1 and a2 in the formulas (16) and (17) are preferably ring structures represented by the formula (11A).

[0205] The compound represented by the formula (16) is preferably represented by the following formula (161). The compound represented by the formula (17) is preferably represented by the following formula (171).

[0206] [ka]

[0207] (In the formula (161) and formula (171), X 13 , X 14 , X 15 and X 16each independently represents the same as Xa and Xb in formula (13), R 141 , R 142 , R 143 and R 144 are each independently R in the formula (13). 17 and R 18 is synonymous with X 19 is a sulfur atom or an oxygen atom.

[0208] In the organic compound layer according to the first embodiment, R in the formula (16), the formula (161), the formula (17), and the formula (171) 141 , R 142 , R 143 and R 144 At least one of fluorine atoms, fluoroalkyl groups, fluoroalkoxy groups, cyano group, an aromatic hydrocarbon group having 6 to 30 ring carbon atoms and having at least one substituent selected from the group consisting of a fluorine atom, a fluoroalkyl group, a fluoroalkoxy group, and a cyano group, or It is preferably a heterocyclic group having 5 to 30 ring atoms and having at least one substituent selected from the group consisting of a fluorine atom, a fluoroalkyl group, a fluoroalkoxy group, and a cyano group.

[0209] In the organic compound layer according to the first embodiment, it is preferable that in the first compound, two or three structures represented by the formula (13) are the same structure.

[0210] The second ring structure represented by the formula (12) is preferably a ring structure represented by the following formula (121) or (122).

[0211] [ka]

[0212] (In the formula (121), X1 and X4 each independently represent a nitrogen atom or R 121 is a carbon atom bonded to R in the formula (121) 121 and R in the formula (122) 122 , R 123 , R 124 and R 125 are each independently R in the formula (12). 15 is synonymous with R 121 are identical to or different from each other, * in the formula (121) and the formula (122) each independently represents a bonding position with another atom in the molecule of the first compound.

[0213] In the organic compound layer according to the first embodiment, the first compound is also preferably a compound represented by the following formula (121A).

[0214] [ka]

[0215] (In the formula (121A), Ar2 is a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic ring having 5 to 50 ring atoms, X1 and X4 each independently represent a nitrogen atom or R 121 is the carbon atom bonded to R 121 are each independently R in the formula (12). 15 is synonymous with R 121 are either identical or different.)

[0216] In the organic compound layer according to the first embodiment, the first compound is also preferably a compound represented by the following formula (121B).

[0217] [ka]

[0218] (In the formula (121B), X1 and X4 each independently represent a nitrogen atom or R 121 a carbon atom bonded to the carbon atom, and a plurality of X1's are the same or different from one another, and a plurality of X4's are the same or different from one another; R 121 are each independently R in the formula (12). 15 is synonymous with R 121 are either identical or different.)

[0219] In the first compound and the second compound contained in the organic compound layer according to the first embodiment, the substituents in the term "substituted or unsubstituted" are each independently an unsubstituted alkyl group having 1 to 25 carbon atoms, an unsubstituted alkenyl group having 2 to 25 carbon atoms, an unsubstituted alkynyl group having 2 to 25 carbon atoms, an unsubstituted cycloalkyl group having 3 to 25 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 ), an unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R 908 a group represented by -COOR 909 a group represented by -P(=O)(R 931 )(R 932 ), a group represented by -Ge(R 933 )(R 934 )(R 935 ), a group represented by -B(R 936 )(R 937 ), a group represented by -S(=O)R 938 and a halogen atom, a cyano group, a nitro group, an unsubstituted aryl group having 6 to 25 ring carbon atoms, or an unsubstituted heterocyclic group having 5 to 25 ring atoms. 901 ~R 909 , and R 931 ~R938 are preferably each independently a hydrogen atom, an unsubstituted alkyl group having 1 to 25 carbon atoms, an unsubstituted aryl group having 6 to 25 ring carbon atoms, or an unsubstituted heterocyclic group having 5 to 25 ring atoms.

[0220] In the first compound and the second compound contained in the organic compound layer according to the first embodiment, it is preferable that the substituents in the term "substituted or unsubstituted" are each independently a halogen atom, an unsubstituted alkyl group having 1 to 25 carbon atoms, an unsubstituted aryl group having 6 to 25 ring carbon atoms, or an unsubstituted heterocyclic group having 5 to 25 ring atoms.

[0221] In the first compound and the second compound contained in the organic compound layer according to the first embodiment, it is preferable that the substituents in the term "substituted or unsubstituted" are each independently an unsubstituted alkyl group having 1 to 6 carbon atoms, an unsubstituted aryl group having 6 to 13 ring carbon atoms, or an unsubstituted heterocyclic group having 5 to 13 ring atoms.

[0222] In the first compound and the second compound contained in the organic compound layer according to the first embodiment, it is preferable that the groups described as "substituted or unsubstituted" are both "unsubstituted" groups.

[0223] The ester group in this specification is at least one group selected from the group consisting of an alkyl ester group and an aryl ester group. The alkyl ester group herein is, for example, —C(═O)OR E It is expressed as R E is, for example, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms (preferably 1 to 10 carbon atoms). The aryl ester group herein is, for example, —C(═O)OR Ar It is expressed as R Ar is, for example, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms.

[0224] The siloxanyl group in this specification is a silicon compound group connected via an ether bond, such as a trimethylsiloxanyl group.

[0225] The carbamoyl group in this specification is represented by -CONH. The substituted carbamoyl group in this specification is, for example, -CONH-Ar. C , or -CONH-R C It is expressed as Ar C is, for example, at least one group selected from the group consisting of substituted or unsubstituted aryl groups having 6 to 50 ring carbon atoms (preferably 6 to 10 ring carbon atoms) and heterocyclic groups having 5 to 50 ring atoms (preferably 5 to 14 ring atoms). C R may be a group in which a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms is bonded to a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. C is, for example, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms (preferably 1 to 6 carbon atoms).

[0226] (Method for producing the first compound according to this embodiment) The first compound according to this embodiment can be produced by a known method. Alternatively, the first compound according to this embodiment can be produced by following a known method and using known alternative reactions and raw materials suited to the target compound.

[0227] (Specific Examples of the First Compound According to the Present Embodiment) Specific examples of the first compound according to this embodiment include the following compounds. However, the present invention is not limited to these specific examples. In the chemical formulae of specific examples of compounds described in this specification, a deuterium atom may be represented as D, a proton atom may be represented as H or may be omitted, a methyl group may be represented as Me, a phenyl group may be represented as Ph, and a cyano group may be represented as -CN or NC-.

[0228] [ka]

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[0240] [ka]

[0241] [ka]

[0242] [ka]

[0243] [ka]

[0244] [ka]

[0245] [ka]

[0246] <Second Compound> In the organic compound layer according to the first embodiment, the second compound is a compound selected from the group consisting of a compound M21 represented by the following formula (21) and a compound M22 represented by the following formula (22).

[0247] [ka]

[0248] (In the formulas (21) and (22), L A1 , L B1 , L C1 , L A2 , L B2 , L C2 and L D2 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, n2 is 1, 2, 3 or 4; If n2 is 1, L E2 teeth, 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, When n2 is 2, 3, or 4, multiple L E2 are identical to or different from each other, When n2 is 2, 3, or 4, multiple L E2 teeth, they combine together to form a substituted or unsubstituted monocyclic ring, or bonded to each other to form a substituted or unsubstituted fused ring, or Not bonded to each other, L does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. E2 teeth, 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, A1, B1, C1, A2, B2, C2 and D2 are each independently 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 -Si(R 291 )(R 292 )(R 293 ) and R 291 , R 292 and R 293 each independently represents a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, R 291 If there are multiple R 291 are identical to or different from each other, R 292 If there are multiple R 292 are identical to or different from each other, R 293 If there are multiple R 293 are identical to or different from each other, However, n2 in the formula (22) is 2, and two L E2 When is a substituted or unsubstituted phenylene group, the first amino group represented by the following formula (22A) in the formula (22) and the second amino group represented by the following formula (22B) are different groups.

[0249] [ka]

[0250] (* in the formula (22A) and formula (22B) represents L E2 )

[0251] In the organic compound layer according to the first embodiment, the compound M21 is a monoamine compound having one substituted or unsubstituted amino group in the molecule.

[0252] In the organic compound layer according to the first embodiment, the first amino group represented by the formula (22A) and the second amino group represented by the formula (22B) are preferably different from each other.

[0253] In the organic compound layer according to the first embodiment, the compound M22 is preferably a diamine compound having two substituted or unsubstituted amino groups in the molecule.

[0254] In the organic compound layer according to the first embodiment, the second compound is preferably a compound containing at least one group represented by the following formula (201).

[0255] [ka]

[0256] (In the formula (201), R 209 and R 210 One or more of the pairs consisting of joined together to form a substituted or unsubstituted monocyclic ring, or linked together to form a substituted or unsubstituted fused ring, or Not bonded to each other, R 201 , R 202 , R 203 , R 204 , R 205 , R 206 , R 207 , and R 208 and R which does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. 209 and R 210 is a single bond bonded to *a, *R that is not a single bond attached to a 201 , R 202 , R 203 , R 204 , R 205 , R 206 , R 207 , and R 208 and R which does not form the substituted or unsubstituted monocyclic ring, does not form the substituted or unsubstituted fused ring, and is not a single bond bonded to *a. 209 and R 210 are each independently, hydrogen atoms, cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted halogenated alkyl group having 1 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 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, ** is L A1 , L B1 , L C1 , L A2 , L B2 , L C2 or L D2 ) (In the second compound, R 901 ~R 904 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 If there are multiple R 901 are identical to or different from each other, R 902 If there are multiple R 902 are identical to or different from each other, R 903 If there are multiple R 903 are identical to or different from each other, R 904 If there are multiple R 904 are either identical or different.)

[0257] In the organic compound layer according to the first embodiment, the second compound is preferably a compound containing two or more groups represented by the formula (201). In the organic compound layer according to the first embodiment, the two or more groups represented by the formula (201) in the second compound are the same or different from each other.

[0258] In the organic compound layer according to the first embodiment, the second compound is preferably a compound represented by the following formula (211).

[0259] [ka]

[0260] (In the formula (211), L A1 , L B1 , L C1 , B1 and C1 are the L in the formula (21), respectively. A1 , L B1 , L C1 , B1 and C1; R 201 , R 202 , R 203 , R 204 , R 205 , R 206 , R 207 , R 208 , R 209 , R 210 and *a are R in the formula (201), respectively. 201 , R 202 , R 203 , R 204 , R 205 , R 206 , R 207 , R 208 , R 209 , R 210 and *a.)

[0261] In the organic compound layer according to the first embodiment, R 209 and R 210 are preferably each independently a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, It is more preferable that the alkyl group is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms. It is more preferable that the alkyl group is a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 18 ring carbon atoms. It is even more preferable that the alkyl group is a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 ring carbon atoms. A substituted or unsubstituted methyl group or a substituted or unsubstituted phenyl group is even more preferred.

[0262] In the organic compound layer according to the first embodiment, R 209 and R 210 are preferably substituted or unsubstituted aryl groups having 6 to 18 ring carbon atoms, more preferably substituted or unsubstituted aryl groups having 6 to 10 ring carbon atoms, and even more preferably substituted or unsubstituted phenyl groups.

[0263] In the organic compound layer according to the first embodiment, R 209 and R 210 is preferably a substituted or unsubstituted aryl group having 6 to 18 ring carbon atoms, more preferably a substituted or unsubstituted aryl group having 6 to 10 ring carbon atoms, and even more preferably a substituted or unsubstituted phenyl group, and R 209 and R 210 The other is preferably a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, more preferably a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms, and even more preferably a substituted or unsubstituted methyl group.

[0264] In the organic compound layer according to the first embodiment, R 209 and R 210 are preferably substituted or unsubstituted alkyl groups having 1 to 6 carbon atoms, more preferably substituted or unsubstituted alkyl groups having 1 to 4 carbon atoms, and even more preferably substituted or unsubstituted methyl groups.

[0265] In the organic compound layer according to the first embodiment, it is preferable that the first compound is a compound represented by the formula (114) and the second compound is a compound represented by the formula (211). In the organic compound layer according to the first embodiment, it is also preferable that the first compound is a compound represented by the formula (121B) and the second compound is a compound represented by the formula (211). In the organic compound layer according to the first embodiment, it is also preferable that the first compound is a compound represented by the formula (133B) and the second compound is a compound represented by the formula (211).

[0266] In the organic compound layer according to the first embodiment, L A1 , L B1 and L C1 Preferably, one or more selected from the group consisting of: are each independently a substituted or unsubstituted arylene group containing at least one deuterium atom and having 6 to 50 ring carbon atoms.

[0267] In the organic compound layer according to the first embodiment, L A2 , L B2 , L C2 , L D2 and L E2 Preferably, one or more selected from the group consisting of: are each independently a substituted or unsubstituted arylene group containing at least one deuterium atom and having 6 to 50 ring carbon atoms.

[0268] In the organic compound layer according to the first embodiment, L A1 , L B1 and L C1 Preferably, one or more selected from the group consisting of: are each independently a substituted or unsubstituted phenylene group containing at least one deuterium atom.

[0269] In the organic compound layer according to the first embodiment, L A2 , L B2 , L C2 , L D2 and L E2 Preferably, one or more selected from the group consisting of: are each independently a substituted or unsubstituted phenylene group containing at least one deuterium atom.

[0270] In the organic compound layer according to the first embodiment, L A1 , L B1 and L C1 It is preferred that one or more selected from the group consisting of are each independently a single bond or a group represented by the following formula (L1), (L2), (L3), (L4), (L5), (L6), (L7), (L8), (L9) or (L10).

[0271] In the organic compound layer according to the first embodiment, L A2 , L B2 , L C2 , L D2 and L E2 It is preferred that one or more selected from the group consisting of are each independently a single bond or a group represented by the following formula (L1), (L2), (L3), (L4), (L5), (L6), (L7), (L8), (L9) or (L10).

[0272] [ka]

[0273] In the formulae (L1) to (L10), * indicates a bonding position. The groups represented by the formulae (L1) to (L10) may or may not each independently have one or more of the above-mentioned "optional substituents." The groups represented by the formulae (L1) to (L10) may each independently have one or more deuterium atoms.

[0274] (Lowest excited singlet energy S1) In the organic compound layer according to the first embodiment, the lowest excited singlet energy of the compound M21 and the lowest excited singlet energy of the compound M22 are each independently 3.00 eV or more and 3.20 eV or less. The lowest excited singlet energy means the energy difference between the lowest excited singlet state and the ground state. In the organic compound layer according to the first embodiment, it is also preferable that the lowest excited singlet energy of the compound M21 and the lowest excited singlet energy of the compound M22 are each independently 3.03 eV or more, 3.05 eV or more, or 3.10 eV or more. In the organic compound layer according to the first embodiment, it is also preferable that the lowest excited singlet energy of the compound M21 and the lowest excited singlet energy of the compound M22 are each independently 3.18 eV or less, 3.17 eV or less, or 3.15 eV or less.

[0275] The following method can be used to measure the lowest excited singlet energy S1 using a solution (sometimes referred to as a solution method). 10 of the compounds to be measured -5 mol / L or more 10 -4 A toluene solution of 100 mol / L or less is prepared and placed in a quartz cell, and the absorption spectrum of this sample is measured at room temperature (300 K). The vertical axis of the absorption spectrum represents absorption intensity, and the horizontal axis represents wavelength. A tangent line is drawn to the falling edge on the long wavelength side of the measured absorption spectrum, and the wavelength value λedge [nm] at the intersection of this tangent line and the horizontal axis is substituted into the following conversion formula (F2) to calculate the lowest excited singlet energy. Conversion formula (F2): S1[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.

[0276] The tangent to the fall on the long wavelength side of the absorption spectrum is drawn as follows. When moving along the spectral curve from the longest maximum value on the longest wavelength side of the absorption spectrum toward 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 minimum on the longest wavelength side (excluding cases where the absorbance is 0.1 or less) is considered to be the tangent to the fall 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 values ​​on the longest wavelength side.

[0277] (HOMO) In the organic compound layer according to the first embodiment, the HOMO of the compound M21 and the HOMO of the compound M22 are each independently −5.70 eV or more and −5.35 eV or less. HOMO is an abbreviation for Highest Occupied Molecular Orbital. In the organic compound layer according to the first embodiment, it is also preferable that the HOMO of the compound M21 and the HOMO of the compound M22 are each independently −5.68 eV or more, −5.65 eV or more, or −5.63 eV or more. In the organic compound layer according to the first embodiment, it is also preferable that the HOMO of the compound M21 and the HOMO of the compound M22 are each independently −5.36 eV or less, −5.40 eV or less, −5.45 eV or less, or −5.50 eV or less. In this specification, the HOMO is measured in the atmosphere using a photoelectron spectrometer. Specifically, the HOMO can be measured by the method described in the Examples.

[0278] (molecular volume) In the organic compound layer according to the first embodiment, the molecular volume of the compound M21 and the molecular volume of the compound M22 are each independently 600 Å or less. 3 Over 880Å 3 1 Å (angstrom) is 10 -10 m (=0.1 nm). In the organic compound layer according to the first embodiment, the molecular volume of the compound M21 and the molecular volume of the compound M22 are each independently 610 Å or less. 3 or greater than 615Å 3 or greater than 630Å 3 or more, or 650 Å 3 It is also preferable that it is more than this. In the organic compound layer according to the first embodiment, the molecular volume of the compound M21 and the molecular volume of the compound M22 are each independently 870 Å or less.3 Less than or equal to 800Å 3 Less than or equal to 775 Å 3 Less than or equal to 750Å 3 Less than or equal to 725Å 3 or less than 700 Å 3 It is also preferable that: The molecular volume of the second compound (compound M21 and compound M22) is 600 Å. 3 Over 880Å 3 It is believed that when the following conditions are satisfied, carriers (electrons and holes) can be controlled by intermolecular interactions between the second compound and the first compound in the organic compound layer. The molecular volume of a compound can be calculated by analyzing the molecular structure of the compound using computational chemistry software GAUSSIAN (manufactured by Gaussian) and WINMOSTAR (manufactured by CrossAbility Co., Ltd.). Specifically, the molecular volume of a compound can be calculated using the volume calculation program in WINMOSTAR. References regarding volume calculation programs include, for example, "Teruo Nagao, Improvements to Molecular Surface Area and Volume Calculation Programs, Bulletin of Hakodate National College of Technology, No. 27, pp. 111-120, 1993."

[0279] (aspect ratio) In the organic compound layer according to the first embodiment, the aspect ratio of the compound M21 and the aspect ratio of the compound M22 are each independently 1.00 or more and 1.55 or less. In the organic compound layer according to the first embodiment, it is also preferable that the aspect ratio of the compound M21 and the aspect ratio of the compound M22 are each independently 1.01 or more, 1.02 or more, or 1.05 or more. In the organic compound layer according to the first embodiment, it is also preferable that the aspect ratio of the compound M21 and the aspect ratio of the compound M22 are each independently 1.54 or less, 1.50 or less, 1.35 or less, or 1.20 or less. It is believed that when the aspect ratio of the second compounds (compounds M21 and M22) is 1.00 or more and 1.55 or less, carriers (electrons and holes) can be controlled in the organic compound layer by intermolecular interactions between the second compounds and the first compounds. The aspect ratio of a compound can be calculated by analyzing the molecular structure of the compound using the aforementioned GAUSSIAN and WINMOSTAR. The aspect ratio of a compound is defined as the ratio L / D of the length L to the diameter D of a cylinder with the smallest diameter that encloses all spheres of the van der Waals radius centered on each atom of the compound (molecule).

[0280] (Method for producing the second compound according to this embodiment) The second compound according to this embodiment can be produced by a known method. Alternatively, the second compound according to this embodiment can be produced by following a known method and using known alternative reactions and raw materials suited to the target compound.

[0281] (Specific Examples of the Second Compound According to the Present Embodiment) Specific examples of the second compound according to this embodiment include the following compounds, however, the present invention is not limited to these specific examples.

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[0316] (Content of first compound) In the organic compound layer according to the first embodiment, the content of the first compound in the organic compound layer is preferably 1% by mass or more and 30% by mass or less. In the organic compound layer according to the first embodiment, the content of the first compound in the organic compound layer is 20% by mass or less, 10% by mass or less, or 8% by mass or less, or It is preferably 5% by mass or less. In the organic compound layer according to the first embodiment, the content of the first compound in the organic compound layer is preferably 2% by mass or more, or 3% by mass or more.

[0317] (Content of second compound) In the organic compound layer according to the first embodiment, the content of the second compound in the organic compound layer is preferably 70% by mass or more and 99% by mass or less. In the organic compound layer according to the first embodiment, the content of the second compound in the organic compound layer is preferably 80% by mass or more, 90% by mass or more, 92% by mass or more, or 95% by mass or more. In the organic compound layer according to the first embodiment, the content of the second compound in the organic compound layer is preferably 98% by mass or less, or 97% by mass or less.

[0318] In the organic compound layer according to the first embodiment, the content of the compound M21 in the organic compound layer is preferably 70% by mass or more and 99% by mass or less. In the organic compound layer according to the first embodiment, the content of the compound M21 in the organic compound layer is 80% by mass or more, 90% by mass or more, or 92% by mass or more; It is preferably 95% by mass or more. In the organic compound layer according to the first embodiment, the content of the compound M21 in the organic compound layer is preferably 98% by mass or less, or 97% by mass or less.

[0319] In the organic compound layer according to the first embodiment, the content of the compound M22 in the organic compound layer is preferably 70% by mass or more and 99% by mass or less. In the organic compound layer according to the first embodiment, the content of the compound M22 in the organic compound layer is 80% by mass or more, 90% by mass or more, or 92% by mass or more, or It is preferably 95% by mass or more. In the organic compound layer according to the first embodiment, the content of the compound M22 in the organic compound layer is preferably 98% by mass or less, or 97% by mass or less.

[0320] (mass ratio of first compound to second compound) In the organic compound layer according to the first embodiment, the mass ratio (m1:m2) of the content m1 of the first compound to the content m2 of the second compound in the organic compound layer is: It is also preferable that the mass ratio (m1:m2) is 1:99 to 20:80, 1:99 to 10:90, 1:99 to 8:92, or 1:99 to 5:95 in the organic compound layer according to the first embodiment.

[0321] In the organic compound layer according to the first embodiment, the mass ratio (m1:m21) of the content m1 of the first compound to the content m21 of the compound M21 in the organic compound layer is preferably 1:99 to 30:70. In the organic compound layer according to the first embodiment, the mass ratio (m1:m21) is preferably 1:99 to 20:80, 1:99 to 10:90, 1:99 to 8:92, or 1:99 to 5:95.

[0322] In the organic compound layer according to the first embodiment, the mass ratio (m1:m22) of the content m1 of the first compound to the content m22 of the compound M22 in the organic compound layer is preferably 1:99 to 30:70. In the organic compound layer according to the first embodiment, the mass ratio (m1:m22) is preferably 1:99 to 20:80, 1:99 to 10:90, 1:99 to 8:92, or 1:99 to 5:95. (Method for forming organic compound layer) The organic compound layer according to the first embodiment can be formed, for example, by co-evaporating the first compound and the second compound, by vapor deposition using a mixture of the first compound and the second compound in advance, or by coating using a mixture of the first compound and the second compound in advance. The mixture of the first compound and the second compound in advance may be a powder. The mixture of the first compound and the second compound in advance may be a solution. The organic compound layer according to the first embodiment is not limited to the methods particularly mentioned above, but may be formed by one or more of known methods such as dry film-forming methods, such as vacuum deposition, sputtering, plasma deposition, and ion plating, and wet film-forming methods, such as spin coating, dipping, flow coating, and inkjet deposition.

[0323] (Thickness of organic compound layer) In the organic compound layer according to the first embodiment, the thickness of the organic compound layer is preferably 2 nm or more and 20 nm or less. In the organic compound layer according to the first embodiment, the film thickness of the organic compound layer is preferably 3 nm or more, or 5 nm or more. In the organic compound layer according to the first embodiment, the film thickness of the organic compound layer is preferably 15 nm or less, or 12 nm or less.

[0324] In the organic compound layer according to the first embodiment, the thickness of the organic compound layer is preferably 5 nm or more and 150 nm or less.

[0325] The organic compound layer according to the first embodiment contains the first compound and the second compound, thereby increasing the sheet resistance. Therefore, for example, by incorporating the organic compound layer according to the first embodiment into the organic layer of an organic EL device, the performance of the organic EL device can be improved, and in particular, crosstalk of the organic EL device can be reduced. Furthermore, the organic compound layer according to the first embodiment is expected to increase the sheet resistance while maintaining the hole injection and hole transport properties of the organic compound layer. Therefore, by using the organic compound layer according to the first embodiment as the organic layer in an organic EL device, it is expected that both crosstalk reduction and an increase in driving voltage can be suppressed.

[0326] Second Embodiment <Organic electroluminescence element> An organic EL element according to a second embodiment will be described. The organic EL device according to the second embodiment includes an organic layer between an anode and a cathode. The organic layer includes one or more layers. The organic layer includes at least one layer containing an organic compound. Alternatively, the organic layer is configured by laminating multiple layers containing organic compounds. The organic layer may further include an inorganic substance (at least one of an inorganic compound and a simple substance), or may include a layer containing an organic compound and an inorganic substance. The organic EL device according to the second embodiment may include a layer containing only an inorganic substance between the anode and the cathode.

[0327] The organic layer may be composed of, for example, a single light-emitting layer, or may include a layer that can be used in an organic EL device. The layer that can be used in an organic EL device is not particularly limited, but may include, for example, at least one layer selected from the group consisting of a hole injection layer, a hole transport layer, an electron blocking layer, a hole blocking layer, an electron transport layer, and an electron injection layer. A region consisting of one or more layers disposed between the light-emitting layer and the anode may be referred to as a hole transport region, and a region consisting of one or more layers disposed between the light-emitting layer and the cathode may be referred to as an electron transport region.

[0328] The organic EL element according to the second embodiment includes a cathode, an anode, and an organic layer between the cathode and the anode. The organic layer includes one or more layers, and at least one of the layers included in the organic layer is a first organic compound layer. It is preferable that the first organic compound layer is the organic compound layer according to the first embodiment.

[0329] In the organic EL element according to the second embodiment, it is preferable that at least one of the layers included in the organic layer is a hole transport layer, and that the hole transport layer is the first organic compound layer (the organic compound layer according to the first embodiment).

[0330] In the organic EL device according to the second embodiment, the organic layer preferably includes two or more hole transport layers, and one layer selected from the group consisting of the two or more hole transport layers is preferably the first organic compound layer (the organic compound layer according to the first embodiment).

[0331] In one aspect of the organic EL element according to the second embodiment, the anode and the first organic compound layer may be in direct contact with each other.

[0332] In one aspect of the organic EL element according to the second embodiment, the anode and the first organic compound layer do not need to be in direct contact with each other.

[0333] In one aspect of the organic EL element according to the second embodiment, it is preferable that at least one of the layers included in the organic layer is an emitting layer, and the first organic compound layer is disposed between the anode and the emitting layer.

[0334] In one aspect of the organic EL element according to the second embodiment, it is preferable that at least one of the layers included in the organic layer is an electron transport layer, and the electron transport layer is disposed between the light-emitting layer and the cathode.

[0335] FIG. 1 shows a schematic configuration of an example of an organic EL element according to the second embodiment. The organic EL device 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 an emission zone 5, a hole-transport zone 6 disposed between the emission zone 5 and the anode 3, and an electron-transport zone 7 disposed between the emission zone 5 and the cathode 4. In the organic layer 10, the hole-transport zone 6, the emission zone 5, and the electron-transport zone 7 are stacked in this order from the anode 3 side. The emission zone 5 includes one emission layer 50. The hole-transport zone 6 includes a hole-injection layer 61, a first hole-transport layer 62, and a second hole-transport layer 63. In the hole-transport zone 6, the hole-injection layer 61, the first hole-transport layer 62, and the second hole-transport layer 63 are stacked in this order from the anode 3 side. The electron-transport zone 7 includes a hole-blocking layer 71, an electron-transport layer 72, and an electron-injection layer 73. In the electron transporting region 7, a hole blocking layer 71, an electron transporting layer 72, and an electron injection layer 73 are laminated in this order from the light emitting region 5 side. In the organic EL element 1, the first hole transport layer 62 is the organic compound layer (first organic compound layer) according to the first embodiment.

[0336] FIG. 2 shows a schematic configuration of another example of the organic EL element according to the second embodiment. The organic EL device 1A includes a light-transmitting substrate 2, an anode 3, a cathode 4, and an organic layer 10A disposed between the anode 3 and the cathode 4. The organic layer 10A includes an emission zone 5, a hole-transport zone 6A between the emission zone 5 and the anode 3, and an electron-transport zone 7 between the emission zone 5 and the cathode 4. In the organic layer 10A, the hole-transport zone 6A, the emission zone 5, and the electron-transport zone 7 are stacked in this order from the anode 3 side. The emission zone 5 and the electron-transport zone 7 are the same in the organic EL device 1A and the organic EL device 1. The hole-transport zone 6A includes a hole-injection layer 61A, a first hole-transport layer 62A, and a second hole-transport layer 63. In the hole-transport zone 6A, the hole-injection layer 61A, the first hole-transport layer 62A, and the second hole-transport layer 63 are stacked in this order from the anode 3 side. In the organic EL element 1A, the hole injection layer 61A is the organic compound layer (first organic compound layer) according to the first embodiment. The first hole transport layer 62A is a layer different from the first hole transport layer 62 in the organic EL element 1. The organic EL element 1 and the organic EL element 1A differ in the arrangement of the organic compound layer (first organic compound layer) according to the first embodiment. The present invention is not limited to the configuration of the organic EL element shown in FIGS.

[0337] The structure of the organic EL element according to this embodiment will be further described.

[0338] (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 include plastic substrates made of polycarbonate, polyarylate, polyethersulfone, polypropylene, polyester, polyvinyl fluoride, and polyvinyl chloride. An inorganic vapor deposition film can also be used.

[0339] (anode) The anode formed on the substrate is preferably made of a metal, alloy, electrically conductive compound, or mixture thereof with a large work function (specifically, 4.0 eV or higher). Specific examples include indium tin oxide (ITO), indium tin oxide containing silicon or silicon oxide, indium zinc oxide, tungsten oxide, indium oxide containing zinc oxide, and graphene. Other examples include gold (Au), platinum (Pt), nickel (Ni), tungsten (W), chromium (Cr), molybdenum (Mo), iron (Fe), cobalt (Co), copper (Cu), palladium (Pd), titanium (Ti), and nitrides of metal materials (e.g., titanium nitride). These materials are usually formed into films by sputtering. For example, indium oxide-zinc oxide can be formed by sputtering using a target containing 1% by mass or more and 10% by mass or less of zinc oxide added to indium oxide. Furthermore, for example, indium oxide containing tungsten oxide and zinc oxide can be formed by sputtering using a target containing 0.5% by mass or more and 5% by mass or less of tungsten oxide and 0.1% by mass or more and 1% by mass or less of zinc oxide relative to indium oxide. Alternatively, the films may be formed by vacuum deposition, coating, inkjet printing, spin coating, or the like. 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 materials that can be used as electrode materials (for example, metals, alloys, electrically conductive compounds, and mixtures of these, as well as elements belonging to Group 1 or Group 2 of the periodic table) can be used. Materials with low work functions, such as elements belonging to Group 1 or 2 of the periodic table, can also be used. These include 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 metals (e.g., MgAg, AlLi), rare earth metals such as europium (Eu), ytterbium (Yb), and alloys containing these metals. Vacuum deposition and sputtering methods can be used to form the anode using alkali metals, alkaline earth metals, and alloys containing these metals. Furthermore, when using silver paste, coating methods and inkjet methods can be used.

[0340] When the organic EL device is a bottom-emission type, the anode is preferably formed of a light-transmitting or semi-transmitting metal material that transmits light from the light-emitting layer. In this specification, light-transmitting or semi-transmitting means the property of transmitting 50% or more (preferably 80% or more) of the light emitted from the light-emitting layer. The light-transmitting or semi-transmitting metal material can be appropriately selected from the materials listed in the anode section.

[0341] When the organic EL device is a top-emission type, the anode is a reflective electrode having a reflective layer. The reflective layer is preferably formed of a metal material having light reflectivity. In this specification, light reflectivity means the property of reflecting 50% or more (preferably 80% or more) of the light emitted from the light-emitting layer. The metal material having light reflectivity can be appropriately selected from the materials listed in the above section on the anode. The anode may be composed of only a reflective layer, or may have a multilayer structure including a reflective layer and a conductive layer (preferably a transparent conductive layer). When the anode has a reflective layer and a conductive layer, it is preferable that the conductive layer is disposed between the reflective layer and the hole transport region. The conductive layer can be appropriately selected from the materials listed in the anode section.

[0342] (hole injection layer) The organic EL device according to the second embodiment preferably includes a hole injection layer between the anode and the light-emitting layer. In the organic EL device according to the second embodiment, the hole injection layer is also preferably the organic compound layer according to the first embodiment (first organic compound layer). In the organic EL device according to the second embodiment, the hole injection layer does not have to be the organic compound layer according to the first embodiment (first organic compound layer). In the organic EL device according to the second embodiment, other hole injection layers include, for example, the following hole injection layers. 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, or manganese oxide. In addition, 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, Other examples include aromatic amine compounds such as 3,5-tris[N-(4-diphenylaminophenyl)-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), and 3-[N-(1-naphthyl)-N-(9-phenylcarbazol-3-yl)amino]-9-phenylcarbazole (abbreviation: PCzPCN1). Furthermore, polymeric compounds (oligomers, dendrimers, polymers, etc.) can also be used as materials with high hole injection properties. Examples include 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), and poly[N,N'-bis(4-butylphenyl)-N,N'-bis(phenyl)benzidine] (abbreviation: Poly-TPD). Acid-added polymeric compounds such as poly(3,4-ethylenedioxythiophene) / poly(styrenesulfonic acid) (PEDOT / PSS) and polyaniline / poly(styrenesulfonic acid) (PAni / PSS) can also be used.

[0343] (Hole transport layer) The organic EL device according to the second embodiment preferably includes a hole transport layer between the anode and the light-emitting layer. The organic EL device according to the second embodiment also preferably includes a plurality of hole transport layers between the anode and the light-emitting layer. In the organic EL device according to the second embodiment, it is also preferable that at least one hole transport layer is the organic compound layer according to the first embodiment (first organic compound layer). In the organic EL device according to the second embodiment, the hole transport layer does not have to be the organic compound layer according to the first embodiment (first organic compound layer). In the organic EL device according to the second embodiment, examples of other hole transport layers include the following hole transport layers. 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), Aromatic amine 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), and 4,4'-bis[N-(spiro-9,9'-bifluoren-2-yl)-N-phenylamino]biphenyl (abbreviation: BSPB) can be used. The substances mentioned here are mainly 10 -6 cm 2 It is a material with a hole mobility of 1 / Vs or more. The hole transport layer may be made of carbazole derivatives such as CBP, CzPA, and PCzPA, or anthracene derivatives such as t-BuDNA, DNA, and DPAnth. Polymer compounds such as poly(N-vinylcarbazole) (abbreviated as PVK) and poly(4-vinyltriphenylamine) (abbreviated as PVTPA) may also be used. However, other substances may be used as long as they have a higher hole-transporting property than an electron-transporting property. The layer containing the substance having a high hole-transporting property may be a single layer or a layer in which two or more layers made of the above-mentioned substances are stacked.

[0344] (electron barrier layer) The organic EL device according to the second embodiment may include an electron blocking layer between the hole transport layer and the light emitting layer. The electron blocking layer is preferably a layer that transports holes and prevents electrons from reaching a layer (e.g., a hole transport layer) closer to the anode than the electron blocking layer. The compound contained in the electron blocking layer is, for example, a compound used in known electron blocking layers, and is preferably at least one compound selected from the group consisting of aromatic amine compounds and carbazole derivatives. The compound contained in the electron blocking layer may also be a monoamine compound having only one substituted or unsubstituted amino group in the molecule. The compound contained in the electron blocking layer may also be a compound having a substituted or unsubstituted carbazolyl group and one substituted or unsubstituted amino group in the molecule. The electron blocking layer may be a layer that prevents excitons generated in the light-emitting layer from migrating to a layer closer to the anode than the electron blocking layer (e.g., a hole transport layer and a hole injection layer) so that excitation energy does not leak from the light-emitting layer to a peripheral layer.

[0345] (light-emitting layer) The light-emitting layer is a layer containing a highly light-emitting substance. Various materials can be used for the light-emitting layer. The light-emitting layer preferably contains a highly light-emitting substance (sometimes referred to as a guest material) and another substance (sometimes referred to as a host material). In the light-emitting layer, it is preferable that the highly light-emitting substance is dispersed in the other substance.

[0346] (Guest material in the light-emitting layer) As a highly luminescent substance, for example, a fluorescent compound that emits fluorescence or a phosphorescent compound that emits phosphorescence can be used. A fluorescent compound is a compound that can emit light from a singlet excited state, and a phosphorescent compound is a compound that can emit light from a triplet excited state. The guest material may also be referred to as a dopant material, an emitter, or a light-emitting material.

[0347] Examples of blue fluorescent materials that can be used in the light-emitting layer include pyrene derivatives, styrylamine derivatives, chrysene derivatives, fluoranthene derivatives, fluorene derivatives, diamine derivatives, triarylamine derivatives, etc. Specific examples include N,N'-bis[4-(9H-carbazol-9-yl)phenyl]-N,N'-diphenylstilbene-4,4'-diamine (abbreviation: YGA2S), 4-(9H-carbazol-9-yl)-4'-(10-phenyl-9-anthryl)triphenylamine (abbreviation: YGAPA), 4-(10-phenyl-9-anthryl)-4'-(9-phenyl-9H-carbazol-3-yl)triphenylamine (abbreviation: PCBAPA), etc.

[0348] Green fluorescent materials that can be used in the light-emitting layer include aromatic amine derivatives, etc. Specifically, N-(9,10-diphenyl-2-anthryl)-N,9-diphenyl-9H-carbazol-3-amine (abbreviation: 2PCAPA), N-[9,10-bis(1,1'-biphenyl-2-yl)-2-anthryl]-N,9-diphenyl-9H-carbazol-3-amine (abbreviation: 2PCABPhA), N-(9,10-diphenyl-2-anthryl)-N,N',N'-triphenyl-1,4-phenylenediamine (abbreviation: 2DPAPA), N-[ 9,10-bis(1,1'-biphenyl-2-yl)-2-anthryl]-N,N',N'-triphenyl-1,4-phenylenediamine (abbreviation: 2DPABPhA), N-[9,10-bis(1,1'-biphenyl-2-yl)]-N-[4-(9H-carbazol-9-yl)phenyl]-N-phenylanthracen-2-amine (abbreviation: 2YGABPhA), N,N,9-triphenylanthracen-9-amine (abbreviation: DPhAPhA), and the like.

[0349] Red fluorescent materials that can be used in the light-emitting layer include tetracene derivatives, diamine derivatives, etc. Specific examples include N,N,N',N'-tetrakis(4-methylphenyl)tetracene-5,11-diamine (abbreviated as p-mPhTD) and 7,14-diphenyl-N,N,N',N'-tetrakis(4-methylphenyl)acenaphtho[1,2-a]fluoranthene-3,10-diamine (abbreviated as p-mPhAFD).

[0350] Examples of blue phosphorescent materials that can be used in the light-emitting layer include metal complexes such as iridium complexes, osmium complexes, and platinum complexes. Specific examples include bis[2-(4',6'-difluorophenyl)pyridinato-N,C2']iridium(III) tetrakis(1-pyrazolyl)borate (abbreviated as FIr6), bis[2-(4',6'-difluorophenyl)pyridinato-N,C2']iridium(III) picolinate (abbreviated as FIrpic), bis[2-(3',5'-bistrifluoromethylphenyl)pyridinato-N,C2']iridium(III) picolinate (abbreviated as Ir(CF3ppy)2(pic)), and bis[2-(4',6'-difluorophenyl)pyridinato-N,C2']iridium(III) acetylacetonate (abbreviated as FIracac).

[0351] Green phosphorescent materials that can be used in the light-emitting layer include iridium complexes, such as tris(2-phenylpyridinato-N,C2')iridium(III) (abbreviation: Ir(ppy)3), bis(2-phenylpyridinato-N,C2')iridium(III) acetylacetonate (abbreviation: Ir(ppy)2(acac)), bis(1,2-diphenyl-1H-benzimidazolato)iridium(III) acetylacetonate (abbreviation: Ir(pbi)2(acac)), and bis(benzo[h]quinolinato)iridium(III) acetylacetonate (abbreviation: Ir(bzq)2(acac)).

[0352] As the red phosphorescent material that can be used in the light-emitting layer, metal complexes such as iridium complexes, platinum complexes, terbium complexes, and europium complexes are used. Specific examples include organometallic complexes such as bis[2-(2'-benzo[4,5-α]thienyl)pyridinato-N,C3']iridium(III) acetylacetonate (abbreviation: Ir(btp)2(acac)), bis(1-phenylisoquinolinato-N,C2')iridium(III) acetylacetonate (abbreviation: Ir(piq)2(acac)), (acetylacetonato)bis[2,3-bis(4-fluorophenyl)quinoxalinato]iridium(III) (abbreviation: Ir(Fdpq)2(acac)), and 2,3,7,8,12,13,17,18-octaethyl-21H,23H-porphyrinplatinum(II) (abbreviation: PtOEP). Furthermore, rare earth metal complexes such as tris(acetylacetonato)(monophenanthroline)terbium(III) (abbreviation: Tb(acac)3(Phen)), tris(1,3-diphenyl-1,3-propanedionato)(monophenanthroline)europium(III) (abbreviation: Eu(DBM)3(Phen)), and tris[1-(2-thenoyl)-3,3,3-trifluoroacetonato](monophenanthroline)europium(III) (abbreviation: Eu(TTA)3(Phen)) can be used as phosphorescent compounds because they emit light from rare earth metal ions (electron transitions between different multiplicities).

[0353] (Host material of the light-emitting layer) The host material may also be referred to as a matrix material. As a substance for dispersing a highly luminescent substance, various substances can be used, and it is preferable to use a substance having a lower lowest unoccupied molecular orbital (LUMO) level than the highly luminescent substance and a lower highest occupied molecular orbital (HOMO) level. As a substance (host material) for dispersing a highly luminescent substance, (1) a metal complex such as an aluminum complex, a beryllium complex, or a zinc complex; (2) a heterocyclic compound such as an oxadiazole derivative, a benzimidazole derivative, or a phenanthroline derivative; (3) a condensed aromatic compound such as a carbazole derivative, an anthracene derivative, a phenanthrene derivative, a pyrene derivative, or a chrysene derivative; or (4) an aromatic amine compound such as a triarylamine derivative or a condensed polycyclic aromatic amine derivative. Specifically, tris(8-quinolinolato)aluminum(III) (abbreviation: Alq), tris(4-methyl-8-quinolinolato)aluminum(III) (abbreviation: Almq3), bis(10-hydroxybenzo[h]quinolinato)beryllium(II) (abbreviation: BeBq2), bis(2-methyl-8-quinolinolato)(4-phenylphenolato)aluminum(III) (abbreviation: BAlq), and bis(8-quinolinolato)zinc (II) (abbreviation: Znq), bis[2-(2-benzoxazolyl)phenolato]zinc(II) (abbreviation: ZnPBO), bis[2-(2-benzothiazolyl)phenolato]zinc(II) (abbreviation: ZnBTZ), and other metal complexes; 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (abbreviation: PBD), 1,3-bis[5-(p-tert-butylphenyl)-1,3,4-oxadiazole] (abbreviation: PBD), and 1,3-bis[5-(p-tert-butylphenyl)-1,3,4-oxadiazole] (abbreviation: PBD). Heterocyclization of [sadiazol-2-yl]benzene (abbreviation: OXD-7), 3-(4-biphenylyl)-4-phenyl-5-(4-tert-butylphenyl)-1,2,4-triazole (abbreviation: TAZ), 2,2',2''-(1,3,5-benzenetriyl)tris(1-phenyl-1H-benzimidazole) (abbreviation: TPBI), bathophenanthroline (abbreviation: BPhen), bathocuproine (abbreviation: BCP), etc. Compounds such as 9-[4-(10-phenyl-9-anthryl)phenyl]-9H-carbazole (abbreviation: CzPA), 3,6-diphenyl-9-[4-(10-phenyl-9-anthryl)phenyl]-9H-carbazole (abbreviation: DPCzPA), 9,10-bis(3,5-diphenylphenyl)anthracene (abbreviation: DPPA), 9,10-di(2-naphthyl)anthracene (abbreviation: DNA), 2-tert-butyl-9,Condensed aromatic compounds such as 10-di(2-naphthyl)anthracene (abbreviation: t-BuDNA), 9,9'-bianthryl (abbreviation: BANT), 9,9'-(stilbene-3,3'-diyl)diphenanthrene (abbreviation: DPNS), 9,9'-(stilbene-4,4'-diyl)diphenanthrene (abbreviation: DPNS2), 3,3',3''-(benzene-1,3,5-triyl)tripylene (abbreviation: TPB3), 9,10-diphenylanthracene (abbreviation: DPAnth), and 6,12-dimethoxy-5,11-diphenylchrysene, and N,N-diphenyl-9-[4-(10-phenyl-9-anthryl)phenyl]-9H-carbazol-3-amine (abbreviation: Cz Aromatic amine compounds such as N,9-diphenyl-N-[4-(10-phenyl-9-anthryl)phenyl]-9H-carbazole-3-amine (abbreviated as PCAPA), N,9-diphenyl-N-{4-[4-(10-phenyl-9-anthryl)phenyl]phenyl}-9H-carbazole-3-amine (abbreviated as PCAPBA), N-(9,10-diphenyl-2-anthryl)-N,9-diphenyl-9H-carbazole-3-amine (abbreviated as 2PCAPA), NPB (or α-NPD), TPD, DFLDPBi, and BSPB can be used. Multiple types of host materials can be used to disperse highly luminescent materials (guest materials).

[0354] (hole blocking layer) The organic EL device according to the second embodiment may include a hole blocking layer between the light-emitting layer and the electron transport layer. The hole blocking layer is preferably a layer that transports electrons and prevents holes from reaching a layer (e.g., an electron transport layer) closer to the cathode than the hole blocking layer. The compound contained in the hole blocking layer is, for example, a compound used in known hole blocking layers. The compound contained in the hole blocking layer is preferably at least one compound selected from the group consisting of metal complexes, heteroaromatic compounds, and polymer compounds, similar to the compounds that can be used in the electron transport layer described below. The compound contained in the hole blocking layer may also be at least one compound selected from the group consisting of imidazole derivatives, benzimidazole derivatives, azine derivatives, carbazole derivatives, and phenanthroline derivatives. Examples of azine derivatives include pyridine derivatives, pyrimidine derivatives, and triazine derivatives. The hole blocking layer may contain one or more compounds selected from the group consisting of pyridine derivatives, pyrimidine derivatives, and triazine derivatives. It is also preferable that the hole blocking layer is a layer that prevents excitons generated in the light-emitting layer from migrating to a layer closer to the cathode than the hole blocking layer (for example, an electron transport layer or an electron injection layer) so that excitation energy does not leak from the light-emitting layer to a peripheral layer.

[0355] (electron transport layer) The organic EL device according to the second embodiment preferably includes an electron transport layer between the cathode and the light-emitting layer. The electron transport layer is a layer containing a substance with high electron transport properties. Examples of materials that can be used for the electron transport layer include: 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. Specifically, examples of low-molecular-weight organic compounds that can be used include metal complexes such as Alq, tris(4-methyl-8-quinolinolato)aluminum (abbreviated as Almq3), bis(10-hydroxybenzo[h]quinolinato)beryllium (abbreviated as BeBq2), BAlq, Znq, ZnPBO, and ZnBTZ. In addition to metal complexes, 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (abbreviation: PBD), 1,3-bis[5-(ptert-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 (abbreviated as p-EtTAZ), bathophenanthroline (abbreviated as BPhen), bathocuproine (abbreviated as BCP), and 4,4'-bis(5-methylbenzoxazol-2-yl)stilbene (abbreviated as BzOs) can also be used. The electron transport layer may contain one or more compounds selected from the group consisting of pyridine derivatives, pyrimidine derivatives, and triazine derivatives as azine derivatives. The substances mentioned here are mainly 10 -6 cm 2 The electron-transporting layer is a substance having an electron mobility of 1 / Vs or higher. Note that any substance other than those mentioned above may be used as the electron-transporting layer as long as it has a higher electron-transporting property than a hole-transporting property. The electron-transporting layer may be a single layer or a stack of two or more layers made of the above-mentioned substances. 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).

[0356] (electron injection layer) The electron injection layer is a layer containing a substance with high electron injection properties. For the electron injection layer, alkali metals, alkaline earth metals, such as lithium (Li), cesium (Cs), calcium (Ca), lithium fluoride (LiF), cesium fluoride (CsF), calcium fluoride (CaF), and lithium oxide (LiOx), or compounds thereof can be used. Alternatively, a substance having electron transport properties containing an alkali metal, alkaline earth metal, or a compound thereof, such as Alq containing magnesium (Mg), can be used. In this case, electron injection from the cathode can be performed more efficiently. Alternatively, the electron injection layer may be formed using a composite material obtained by mixing an organic compound and an electron donor (donor). Such composite materials have 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 at transporting the generated electrons. 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, such as lithium, cesium, magnesium, calcium, erbium, and ytterbium. Alkali metal oxides and alkaline earth metal oxides are also preferred, such as lithium oxide, calcium oxide, and barium oxide. Lewis bases such as magnesium oxide can also be used. Organic compounds such as tetrathiafulvalene (TTF) can also be used.

[0357] (cathode) The cathode is preferably made of a metal, alloy, electrically conductive compound, or mixture thereof, each having a small work function (specifically, 3.8 eV or less). Specific examples of such cathode materials 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), alloys containing these (e.g., MgAg, AlLi), rare earth metals such as europium (Eu), ytterbium (Yb), and alloys containing these. 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. By providing an electron injection layer, the cathode can be formed using various conductive materials, regardless of the magnitude of the work function, such as Al, Ag, ITO, graphene, indium oxide-tin oxide containing silicon or silicon oxide, etc. These conductive materials can be formed into films by a sputtering method, an inkjet method, a spin coating method, etc.

[0358] When the organic EL device is a bottom-emission type, the cathode is a reflective electrode. The reflective electrode is preferably formed of a metal material having light reflectivity. The metal material having light reflectivity can be appropriately selected from the materials listed in the cathode section.

[0359] When the organic EL device is a top-emission type, the cathode is preferably formed of a light-transmitting or semi-transmitting metal material that transmits light from the light-emitting layer. The light-transmitting or semi-transmitting metal material can be appropriately selected from the materials listed in the cathode section.

[0360] The organic EL element according to this embodiment may be a bottom-emission type organic EL element, or may be a top-emission type organic EL element. When the organic EL element is a bottom-emission type, it is preferable that the anode is a light-transmitting electrode having light transparency, and the cathode is a light-reflective electrode having light reflection. When the organic EL element is a top-emission type, it is preferable that the anode is a light-reflective electrode having light reflectivity, and the cathode is a light-transmitting electrode having light transmittance.

[0361] (capping layer) When the organic EL device is a top-emitting type, the organic EL device usually includes a capping layer on top of the cathode. The capping layer may contain, for example, at least one compound selected from the group consisting of polymer compounds, metal oxides, metal fluorides, metal borides, silicon nitride, and silicon compounds (such as silicon oxide). The capping layer may also contain at least one compound selected from the group consisting of aromatic amine derivatives, anthracene derivatives, pyrene derivatives, fluorene derivatives, and dibenzofuran derivatives. Furthermore, a laminate in which layers containing these substances are laminated can also be used as the capping layer.

[0362] (Layer formation method) The method for forming each layer of the organic EL element of this embodiment is not limited to those specifically mentioned above, but may be one or more of known methods such as dry film-forming methods such as vacuum deposition, sputtering, plasma deposition, and ion plating, and wet film-forming methods such as spin coating, dipping, flow coating, and inkjet deposition.

[0363] (film thickness) The thickness of each layer of the organic EL element according to the second embodiment is not limited except as specifically mentioned above. However, if the thickness is too thin, defects such as pinholes are likely to occur, whereas if the thickness is too thick, a high applied voltage is required, resulting in poor efficiency. Therefore, a thickness in the range of several nm to 1 μm is usually preferred.

[0364] The organic EL element according to the second embodiment includes the organic compound layer according to the first embodiment in the organic layer. The organic compound layer according to the first embodiment can increase the sheet resistance. Therefore, according to the second embodiment, the element performance of the organic EL element can be improved, and in particular, crosstalk of the organic EL element can be reduced. Furthermore, the organic compound layer according to the first embodiment can be expected to increase the sheet resistance while maintaining the hole injection and hole transport properties of the organic compound layer. Therefore, according to the organic EL element according to the second embodiment, it can be expected to achieve both reduced crosstalk and suppressed increases in driving voltage. The organic EL element according to the second embodiment can be used in electronic devices such as display devices and light-emitting devices.

[0365] Third Embodiment (electronic equipment) The electronic device according to this embodiment is equipped with the organic EL element according to the above-described embodiment. The electronic device according to this embodiment preferably is equipped with a plurality of the organic EL elements according to the above-described embodiment. Examples of the electronic device include a display device and a light-emitting device. Examples of the display device include display components (e.g., an organic EL panel module), televisions, mobile phones, tablets, and personal computers. Examples of the light-emitting device include lighting and vehicle lighting fixtures. The light-emitting device can be used in a display device, and can also be used, for example, as a backlight for a display device.

[0366] [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.

[0367] The organic compound layer according to the present invention may be a single layer containing only the organic compound layer according to the first embodiment, or may be a laminate containing multiple layers. When the organic compound layer according to the present invention is a laminate, at least one of the multiple layers may be the organic compound layer according to the first embodiment. The organic compound layer as a laminate can be expected to have the same effects as the organic compound layer according to the first embodiment. An example of an organic compound layer according to the present invention that is a laminate is a laminate in which an organic compound layer according to the first embodiment (first organic compound layer) and a second organic compound layer containing a compound different from that of the first organic compound layer are stacked. The second organic compound layer is preferably, for example, a layer containing the second compound described in the first embodiment. It is also preferable that the second organic compound layer contains the second compound described in the first embodiment but does not contain the first compound.

[0368] For example, in an organic EL device, the number of light-emitting layers is not limited to one, and two or more light-emitting layers may be stacked. For example, each light-emitting layer may be a fluorescent light-emitting layer or a phosphorescent light-emitting layer that utilizes light emission due to electron transition from a triplet excited state directly to the ground state.

[0369] Furthermore, when the organic EL element has a plurality of light-emitting layers, these light-emitting layers may be provided in contact with 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.

[0370] In addition, the specific structure and shape in carrying out the present invention may be other structures within the scope of achieving the object of the present invention. [Example]

[0371] 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.

[0372] <Compound> The structures of the first compounds used in the production of the elements according to Examples 1-1 to 1-8, Examples 2-1 to 2-8, Examples 3-1 to 3-8, and Examples 4-1 to 4-8 are shown below.

[0373] [ka]

[0374] The structures of the second compounds used in the production of the elements according to Examples 1-1 to 1-8, Examples 2-1 to 2-8, Examples 3-1 to 3-8, and Examples 4-1 to 4-8 are shown below.

[0375] [ka]

[0376] The compound HA-1 and the comparative compounds shown below were used to manufacture the elements according to Comparative Examples 1-1, 2-1, 3-1, and 4-1.

[0377] [ka]

[0378] The compound HT-1 and the comparative compounds shown below were used to manufacture the elements according to Comparative Examples 1-2, 2-2, 3-2, and 4-2.

[0379] [ka]

[0380] <Fabrication of element> (Example 1-1) Fig. 3 shows a schematic plan view of a substrate having a comb-teeth electrode used in the fabrication of the element according to Example 1-1. Fig. 4 shows a schematic cross-sectional view of the element according to Example 1-1. The cross-section shown in Fig. 4 is a cross-section after the element has been fabricated, and corresponds to the cross-section taken along line IV-IV in Fig. 3. The element shown in Fig. 4 was fabricated using the comb-teeth electrode as shown in Fig. 3, and the sheet resistance (Rs) of the organic compound layer in the element according to Example 1-1 was calculated by measuring the current-voltage characteristics in the in-plane direction of the film. The details of the fabrication method of the element are as follows. First, four comb-tooth electrodes 30 each having a first electrode 31 and a second electrode 32 were arranged on one glass substrate 20 (see FIG. 3). In each of the four comb-tooth electrodes 30, a first terminal 31a was provided on the first electrode 31, and a second terminal 32a was provided on the second electrode 32. The comb-tooth electrodes 30 were formed by laminating, in this order from the glass substrate 20 side, an ITO film having a thickness of 10 nm, an Ag film having a thickness of 150 nm, and an ITO film having a thickness of 10 nm. The four comb-tooth electrodes 30 were arranged with different inter-electrode distances D1 (distances between the first electrode 31 and the second electrode 32). Specifically, four comb-tooth electrodes 30 with inter-electrode distances D1 of 10 μm, 20 μm, 40 μm, and 80 μm were arranged. In each of the four comb-tooth electrodes 30, the number of comb teeth of the first electrode 31 was 10, and the number of comb teeth of the second electrode 32 was 10, for a total of 20. In addition, in each of the four comb-tooth electrodes 30, the electrode width D3 was 37640 μm. Next, an insulating resin 70 was formed on the glass substrate 20 and the comb-tooth electrodes 30. In FIG. 3, the area where the insulating resin 70 was formed and the area where the organic compound layer 60 was formed are indicated by the areas surrounded by dashed lines. The insulating resin 70 was also formed in the area where the organic compound layer 60 was formed and between the first electrode 31 and the second electrode 32. Rather than covering the entire surface of the comb-tooth electrodes 30 with the insulating resin 70, the comb-tooth electrodes 30 were exposed at a predetermined width (see the wiring width D2 shown in FIG. 4) and covered with the insulating resin 70. In each of the four comb-tooth electrodes 30, the wiring width D2 of the wiring portion was set to 20 μm. Furthermore, as shown in FIG. 4, the first electrode 31 and the second electrode 32 were exposed at the wiring width D2, and both sides of each of the first electrode 31 and the second electrode 32 were covered with the insulating resin 70 at a covering width D4. The covering width D4 was set to 2.5 μm. The exposed portion of the comb-tooth electrode 30 that is not covered with the insulating resin 70 may be referred to as a wiring portion. Polyimide resin was used as the insulating resin 70. The distance between the insulating resin 70 (polyimide resin) and the first terminal 31a and the second terminal 32a was set to 4.5 mm. Thereafter, as shown in FIG. 4, the first compound and the second compound listed in Table 1 were co-deposited by vacuum deposition on the insulating resin 70 and the wiring portion of the comb-tooth electrode 30 to form a film of a first organic compound layer 610 having a thickness of 10 nm. 4, the material for the second organic compound layer shown in Table 1 was deposited by vacuum deposition on the insulating resin 70 and the first organic compound layer 610 to form a second organic compound layer 620 with a thickness of 80 nm. By the method described above, the element 100 of Example 1-1 was obtained. The inter-electrode distance D1, the number of comb teeth, the terminal positions, pitch and size, etc. shown in FIGS. 3 and 4 are simplified versions of the substrates having comb electrodes that were actually used.

[0381] (Examples 1-2 to 1-8) The elements of Examples 1-2 to 1-8 were fabricated in the same manner as in Example 1-1, except that the second compound (HT-1) used in the first organic compound layer 610 and the second organic compound layer 620 in Example 1-1 was changed to the second compound listed in Table 1.

[0382] (Comparative Example 1-1) The element of Comparative Example 1-1 was fabricated in the same manner as in Example 1-1, except that the second compound (HT-1) used in the first organic compound layer 610 and the second organic compound layer 620 of Example 1-1 was changed to the second compound listed in Table 1.

[0383] (Comparative Example 1-2) The element of Comparative Example 1-2 was fabricated in the same manner as in Example 1-1, except that the first compound (HA-1) used in the first organic compound layer 610 of Example 1-1 was changed to the first compound listed in Table 1.

[0384] [Table 1]

[0385] Example 2-1 The element of Example 2-1 was fabricated in the same manner as Example 1-1, except that the first compound (HA-1) used in the first organic compound layer 610 of Example 1-1 was changed to the first compound listed in Table 2.

[0386] (Examples 2-2 to 2-8) The elements of Examples 2-2 to 2-8 were fabricated in the same manner as in Example 2-1, except that the second compound (HT-1) used in the first organic compound layer 610 and the second organic compound layer 620 in Example 2-1 was changed to the second compound listed in Table 2.

[0387] (Comparative Example 2-1) The element of Comparative Example 2-1 was fabricated in the same manner as in Example 2-1, except that the second compound (HT-1) used in the first organic compound layer 610 and the second organic compound layer 620 of Example 2-1 was changed to the second compound listed in Table 2.

[0388] (Comparative Example 2-2) The element of Comparative Example 2-2 was fabricated in the same manner as Example 2-1, except that the first compound (HA-1) used in the first organic compound layer 610 of Example 2-1 was changed to the first compound listed in Table 2.

[0389] [Table 2]

[0390] (Example 3-1) The element of Example 3-1 was fabricated in the same manner as Example 1-1, except that the first compound (HA-1) used in the first organic compound layer 610 of Example 1-1 was changed to the first compound listed in Table 3.

[0391] (Examples 3-2 to 3-8) The elements of Examples 3-2 to 3-8 were fabricated in the same manner as in Example 3-1, except that the second compound (HT-1) used in the first organic compound layer 610 and the second organic compound layer 620 in Example 3-1 was changed to the second compound listed in Table 3.

[0392] (Comparative Example 3-1) The element of Comparative Example 3-1 was fabricated in the same manner as in Example 3-1, except that the second compound (HT-1) used in the first organic compound layer 610 and the second organic compound layer 620 of Example 3-1 was changed to the second compound listed in Table 3.

[0393] (Comparative Example 3-2) The element of Comparative Example 3-2 was fabricated in the same manner as Example 3-1, except that the first compound (HA-1) used in the first organic compound layer 610 of Example 3-1 was changed to the first compound listed in Table 3.

[0394] [Table 3]

[0395] Example 4-1 The element of Example 4-1 was fabricated in the same manner as Example 1-1, except that the first compound (HA-1) used in the first organic compound layer 610 of Example 1-1 was changed to the first compound listed in Table 4.

[0396] (Examples 4-2 to 4-8) The elements of Examples 4-2 to 4-8 were fabricated in the same manner as in Example 4-1, except that the second compound (HT-1) used in the first organic compound layer 610 and the second organic compound layer 620 in Example 4-1 was changed to the second compound listed in Table 4.

[0397] (Comparative Example 4-1) The element of Comparative Example 4-1 was fabricated in the same manner as in Example 4-1, except that the second compound (HT-1) used in the first organic compound layer 610 and the second organic compound layer 620 in Example 4-1 was changed to the second compound listed in Table 4.

[0398] (Comparative Example 4-2) The element of Comparative Example 4-2 was fabricated in the same manner as Example 4-1, except that the first compound (HA-1) used in the first organic compound layer 610 of Example 4-1 was changed to the first compound listed in Table 4.

[0399] [Table 4]

[0400] <Element evaluation> (sheet resistance (Rs)) The element prepared as described above was used as an element for measuring sheet resistance, and the sheet resistance of the organic compound layer was measured. First, a voltage of 50 V was applied between the first and second electrodes of each comb-tooth electrode of the sheet resistance measurement element, and the current and resistance values ​​flowing between the first and second electrodes were measured. A high-resistance / low-current electrometer can be used to measure the current and resistance values; for example, a "Subfemtoampere Remote Source Meter Model 6430" (manufactured by KEITHLEY) was used in this example. Next, the inter-electrode distance D1 and the resistance value corresponding to each inter-electrode distance D1 were plotted, and the Rslope value, which is the slope of the linear regression line obtained from the plot, was calculated. The Rslope value is expressed in Ω / μm. The sheet resistance (Rs) was calculated by multiplying the Rslope value by the electrode width (37640 μm). The unit of sheet resistance (Rs) is Ω / sq. (ohms per square). The sheet resistance (Rs) is shown in Table 5.

[0401] [Table 5]

[0402] The first organic compound layers according to Examples 1-1, 1-6, 2-1, and 2-6 had increased sheet resistance compared to Comparative Example 1-2. By using the first organic compound layers according to Examples 1-1, 1-6, 2-1, and 2-6 in organic EL devices, crosstalk can be expected to be reduced. The first organic compound layers according to Examples other than Examples 1-1, 1-6, 2-1, and 2-6 also contain the first compound and the second compound described in the above-described embodiment, similar to Examples 1-1, 1-6, 2-1, and 2-6. Therefore, an increase in sheet resistance can be expected compared to the comparative examples, and a reduction in crosstalk can be expected when the first organic compound layer is used in an organic EL element.

[0403] <Compound evaluation> (Affinity (Af)) The affinity (Af) of the measurement object (compound or material) was calculated by the following formula (Y1): The unit of affinity (Af) is eV. (Number Y1):Af=-1.19×(Ere-Efc)-4.78eV In the formula (Y1), Ere and Efc are as follows: Ere: First reduction potential of the object to be measured (DPV, Negative scan) Efc: First oxidation potential of ferrocene (DPV, positive scan), (ca. +0.55 V 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 measurement target substance to a concentration of 1.0 mmol / L in N,N-dimethylformamide (DMF) as the solvent and dissolving tetrabutylammonium hexafluorophosphate (TBHP) as the supporting electrolyte to a concentration of 100 mmol / L. A glassy carbon electrode was used as the working electrode. A platinum (Pt) electrode was used as the counter electrode.

[0404] (Lowest excited singlet energy S1) A 10 μmol / 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 (300 K). 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 of the tangent line and the horizontal axis was substituted into the following conversion formula (F2) to calculate the lowest excited singlet energy. Conversion formula (F2): S1[eV]=1239.85 / λedge The absorption spectrum measuring device used was a spectrophotometer manufactured by Hitachi (device name: U3310).

[0405] The tangent to the fall on the long wavelength side of the absorption spectrum is drawn as follows. When moving along the spectral curve from the longest maximum value on the longest wavelength side of the absorption spectrum toward 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 minimum on the longest wavelength side (excluding cases where the absorbance is 0.1 or less) is considered to be the tangent to the fall 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 values ​​on the longest wavelength side.

[0406] (HOMO) The HOMO (energy level of the highest occupied molecular orbital) was measured in the atmosphere using a photoelectron spectrometer ("AC-3" manufactured by Riken Keiki Co., Ltd.) Specifically, the HOMO of the compound was measured by irradiating the material with light and measuring the number of electrons generated by charge separation.

[0407] (molecular volume) The molecular volume of the compound was calculated by analyzing the molecular structure of the compound using computational chemistry software GAUSSIAN (manufactured by Gaussian) and WINMOSTAR (manufactured by CrossAbility Co., Ltd.) Specifically, the molecular volume of the compound was calculated using the volume calculation program in WINMOSTAR.

[0408] (aspect ratio) The aspect ratio of a compound was calculated by analyzing the molecular structure of the compound using the aforementioned GAUSSIAN and WINMOSTAR. The aspect ratio of a compound was defined as the ratio L / D of the length L to the diameter D of a cylinder with the smallest diameter that encloses all spheres of van der Waals radius centered on each atom of the compound (molecule). [Explanation of symbols]

[0409] 1, 1A...organic electroluminescent element, 10, 10A...organic layer, 2...substrate, 3...anode, 4...cathode, 5...emission zone, 50...emission layer, 6...hole transport zone, 61...hole injection layer, 61A...first organic compound layer (hole injection layer), 62...first organic compound layer (first hole transport layer), 62A...first hole transport layer, 63...second hole transport layer (electron blocking layer), 6A...hole transport zone, 7...electron transport zone, 71...hole blocking layer, 72...electron transport layer, 73...electron injection layer.

Claims

1. an organic compound layer containing one or more first compounds and one or more second compounds; The first compound includes at least one ring structure selected from the group consisting of a first ring structure represented by the following formula (11) and a second ring structure represented by the following formula (12): the affinity of the first compound is less than 5.10 eV; The second compound is a compound selected from the group consisting of a compound M21 represented by the following formula (21) and a compound M22 represented by the following formula (22), The compound M21 is a monoamine compound, the lowest excited singlet energy of the compound M21 and the lowest excited singlet energy of the compound M22 are each independently 3.00 eV or more and 3.20 eV or less; the HOMO of the compound M21 and the HOMO of the compound M22 are each independently −5.70 eV or more and −5.35 eV or less; The molecular volume of the compound M21 and the molecular volume of the compound M22 are each independently 600 Å ３ More than 880 Å ３ is as follows: the aspect ratio of the compound M21 and the aspect ratio of the compound M22 are each independently 1.00 or more and 1.55 or less; organic compound layer. 【Chemical 1】 (The first ring structure is, in the molecule of the first compound, a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 50 ring carbon atoms, and fused with one or more rings selected from the group consisting of substituted or unsubstituted heterocycles having 5 to 50 ring atoms; In the formula (11), =X １０ The structure represented by the formula (11a), (11b), (11c), (11d), (11e), (11f), (11g), (11h), (11i), (11j), (11k) or (11m) is represented by the following formula: 【Chemistry 2】 【Chemistry 3】 【Chemistry 4】 【Chemistry 5】 (In the formula (11a), (11b), (11c), (11d), (11e), (11f), (11g), (11h), (11i), (11j), (11k) or (11m), R １１ ~R １４ and R １１１ ~R １２０ are each independently, hydrogen atoms, halogen atoms, hydroxy groups, cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted halogenated alkyl group having 1 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 aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. (In the formula (12), X １ , X ２ , X ３ , X ４ and X ５ are each independently, nitrogen atom, R １５ a carbon atom bonded to a carbon atom bonded to another atom in the molecule of the first compound, X １ , X ２ , X ３ , X ４ and X ５ at least one of which is a carbon atom bonded to another atom in the molecule of the first compound, R １５ teeth, hydrogen atoms, halogen atoms, cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted halogenated 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, a substituted or unsubstituted heterocyclic group having 5 to 50 ring 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 alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, carboxyl group, a substituted or unsubstituted ester group, a substituted or unsubstituted carbamoyl group, a nitro group, and is selected from the group consisting of substituted or unsubstituted siloxanyl groups; R １５ If there are multiple R １５ are the same or different.) (In the first compound, 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 a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R ９０１ If there are multiple R ９０１ are identical to or different from each other, R ９０２ If there are multiple R ９０２ are identical to or different from each other, R ９０３ If there are multiple R ９０３ are identical to or different from each other, R ９０４ If there are multiple R ９０４ are identical to or different from each other, R ９０５ If there are multiple R ９０５ are identical to or different from each other, R ９０６ If there are multiple R ９０６ are identical to or different from each other, R ９０７ If there are multiple R ９０７ are the same or different from each other.) 【Chemistry 6】 (In the formulas (21) and (22), L Ａ１ , L Ｂ１ , L Ｃ１ , L Ａ２ , L Ｂ２ , L Ｃ２ and L Ｄ２ 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, n2 is 1, 2, 3 or 4; When n2 is 1, L Ｅ２ teeth, 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, When n2 is 2, 3, or 4, multiple L Ｅ２ are identical to or different from each other, When n2 is 2, 3, or 4, multiple L Ｅ２ teeth, they combine together to form a substituted or unsubstituted monocyclic ring, or bonded to each other to form a substituted or unsubstituted fused ring, or Not bonded to each other, L does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. Ｅ２ teeth, 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, A １ , B １ , C １ , A ２ , B ２ , C ２ and D ２ are each independently, 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 -Si(R ２９１ ) (R ２９２ ) (R ２９３ ) and R ２９１ , R ２９２ and R ２９３ each independently represents a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, R ２９１ If there are multiple R ２９１ are identical to or different from each other, R ２９２ If there are multiple R ２９２ are identical to or different from each other, R ２９３ If there are multiple R ２９３ are identical to or different from each other, However, n2 in the formula (22) is 2, and two L Ｅ２ is a substituted or unsubstituted phenylene group, the first amino group represented by the following formula (22A) in the formula (22) and the second amino group represented by the following formula (22B) are different groups. 【Chemistry 7】 (* in the formula (22A) and formula (22B) represents L Ｅ２ )

2. The organic compound layer according to claim 1 , The first compound includes at least one ring structure represented by the following formula (11A) as the first ring structure: organic compound layer. 【Chemistry 8】

3. 3. The organic compound layer according to claim 1, The affinity of the first compound is 5.08 eV or less. organic compound layer.

4. The organic compound layer according to any one of claims 1 to 3, The affinity of the first compound is 4.00 eV or more. organic compound layer.

5. The organic compound layer according to any one of claims 1 to 4, The first compound is a compound represented by the following formula (110): organic compound layer. 【Chemistry 9】 (In the formula (110), Ac1 and Ac2 each independently represent a partial structure containing the first ring structure, The partial structure Ac1 and the partial structure Ac2 are the same or different from each other, R １０１ and R １０２ are each independently a hydrogen atom, a halogen atom, or a cyano group.

6. The organic compound layer according to claim 5 , The partial structure Ac1 is represented by the following formula (111): The partial structure Ac2 is represented by the following formula (112): organic compound layer. 【Chemistry 10】 (In the formulas (111) and (112), X １１ and X １２ are each independently X in the formula (11). １０ is synonymous with Y １１ , Y １２ , R １０３ and R １０４ are each independently, hydrogen atoms, halogen atoms, hydroxy groups, cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted halogenated alkyl group having 1 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 aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, X １１ and X １２ and are the same or different from each other, Y １１ and Y １２ and are the same or different from each other, R １０３ and R １０４ and are the same or different from each other, a in the formula (111) represents a condensation position of the partial structure Ac1, and b in the formula (112) represents a condensation position of the partial structure Ac2.

7. 7. The organic compound layer according to claim 5, the partial structure Ac1 and the partial structure Ac2 are different from each other; organic compound layer.

8. 8. The organic compound layer according to claim 6 or 7, The first compound is a compound represented by the following formula (113): organic compound layer. 【Chemistry 11】 (In the formula (113), X １１ and X １２ are each independently X in the formula (11). １０ is synonymous with R １０１ and R １０２ are R in the formula (110), respectively. １０１ and R １０２ is synonymous with Y １１ , Y １２ , R １０３ , R １０４ , a and b are the Y in the formula (111) or (112), respectively. １１ , Y １２ , R １０３ , R １０４ , a and b are synonymous with each other; X １１ and X １２ and are the same or different from each other, Y １１ and Y １２ and are the same or different from each other, R １０３ and R １０４ and are the same or different.)

9. The organic compound layer according to any one of claims 1 to 8, The second compound is a compound containing at least one group represented by the following formula (201): organic compound layer. 【Chemistry 12】 (In the formula (201), R ２０９ and R ２１０ One or more of the sets consisting of joined together to form a substituted or unsubstituted monocyclic ring, or linked together to form a substituted or unsubstituted fused ring, or Not bonded to each other, R ２０１ , R ２０２ , R ２０３ , R ２０４ , R ２０５ , R ２０６ , R ２０７ , and R ２０８ and R which does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. ２０９ and R ２１０ is a single bond bonded to *a, *R that is not a single bond bonded to a ２０１ , R ２０２ , R ２０３ , R ２０４ , R ２０５ , R ２０６ , R ２０７ , and R ２０８ and R which does not form the substituted or unsubstituted monocyclic ring, does not form the substituted or unsubstituted fused ring, and is not a single bond bonded to *a. ２０９ and R ２１０ are each independently, hydrogen atoms, cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted halogenated alkyl group having 1 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 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, ** is L Ａ１ , L Ｂ１ , L Ｃ１ , L Ａ２ , L Ｂ２ , L Ｃ２ or L Ｄ２ indicates the bonding position with (In the second compound, R ９０１ ~R ９０４ 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 If there are multiple R ９０１ are identical to or different from each other, R ９０２ If there are multiple R ９０２ are identical to or different from each other, R ９０３ If there are multiple R ９０３ are identical to or different from each other, R ９０４ If there are multiple R ９０４ are the same or different from each other.)

10. The organic compound layer according to claim 9 , the second compound is a compound containing two or more groups represented by formula (201), The two or more groups represented by the formula (201) are the same or different. organic compound layer.

11. 11. The organic compound layer according to claim 9 or 10, The first compound is a compound represented by the following formula (114): The second compound is a compound represented by the following formula (211): organic compound layer. 【Chemistry 13】 (In the formula (114), R １０１ and R １０２ are each independently a hydrogen atom, a halogen atom, or a cyano group, Y １１ , Y １２ , R １０３ and R １０４ are each independently, hydrogen atoms, halogen atoms, hydroxy groups, cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted halogenated alkyl group having 1 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 aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, Y １１ and Y １２ and are the same or different from each other, R １０３ and R １０４ and are the same or different.) 【Chemistry 14】 (In the formula (211), L Ａ１ , L Ｂ１ , L Ｃ１ , B １ and C １ are L in the formula (21), respectively. Ａ１ , L Ｂ１ , L Ｃ１ , B １ and C １ is synonymous with R ２０１ , R ２０２ , R ２０３ , R ２０４ , R ２０５ , R ２０６ , R ２０７ , R ２０８ , R ２０９ , R ２１０ and *a are R in the formula (201), respectively. ２０１ , R ２０２ , R ２０３ , R ２０４ , R ２０５ , R ２０６ , R ２０７ , R ２０８ , R ２０９ , R ２１０ and *a.)

12. The organic compound layer according to any one of claims 1 to 11, L Ａ１ , L Ｂ１ and L Ｃ１ and one or more selected from the group consisting of: each independently represents a substituted or unsubstituted arylene group containing at least one deuterium atom and having 6 to 50 ring carbon atoms. organic compound layer.

13. The organic compound layer according to any one of claims 1 to 12, L Ａ１ , L Ｂ１ and L Ｃ１ and one or more selected from the group consisting of: each independently represents a substituted or unsubstituted phenylene group containing at least one deuterium atom. organic compound layer.

14. The organic compound layer according to any one of claims 1 to 13, the content of the first compound in the organic compound layer is 1% by mass or more and 30% by mass or less; organic compound layer.

15. The organic compound layer according to any one of claims 1 to 14, the organic compound layer has a thickness of 2 nm or more and 20 nm or less; organic compound layer.

16. The organic compound layer according to any one of claims 1 to 15, The organic compound layer has a thickness of 5 nm or more and 150 nm or less. organic compound layer.

17. An organic electroluminescence element, a cathode, an anode, and an organic layer between the cathode and the anode; The organic layer comprises one or more layers, At least one layer among the layers included in the organic layer is a first organic compound layer, The first organic compound layer is the organic compound layer according to any one of claims 1 to 16. Organic electroluminescent element.

18. The organic electroluminescence device according to claim 17, At least one layer among the layers included in the organic layer is a hole transport layer, the hole transport layer is the first organic compound layer; Organic electroluminescent element.

19. The organic electroluminescence device according to claim 17, the organic layer includes two or more hole transport layers, any one layer selected from the group consisting of two or more hole transport layers is the first organic compound layer; Organic electroluminescent element.

20. 20. The organic electroluminescence device according to claim 17, the anode and the first organic compound layer are in direct contact with each other; Organic electroluminescent element.

21. The organic electroluminescence device according to any one of claims 17 to 20, At least one layer among the layers included in the organic layer is an emitting layer, the first organic compound layer is disposed between the anode and the light-emitting layer; Organic electroluminescent element.

22. 22. The organic electroluminescence device according to claim 21, At least one layer among the layers included in the organic layer is an electron transport layer, the electron transport layer is disposed between the light-emitting layer and the cathode; Organic electroluminescent element.

23. An electronic device equipped with the organic electroluminescence element according to any one of claims 17 to 22.

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