Organic electroluminescence element and electronic device

Abstract

To provide an organic electroluminescence element with improved performance.SOLUTION: An organic electroluminescent device 1 includes an anode 3, a cathode 4, an emission zone 5 disposed between the anode 3 and the cathode 4, and a hole blocking layer 70 disposed between the emission zone 5 and the cathode 4, and the hole blocking layer 70 contains a first hole blocking layer material and a second hole blocking layer material, the second hole blocking layer material being a compound that exhibits fluorescent emission with a maximum peak wavelength of 500 nm or less, the emission zone 5 containing an emission zone material, and a triplet energy T1(M1) of the first hole blocking layer material and a triplet energy T1(M2) of the emission zone material satisfy the relationship of the following mathematical formula (1): T1(M1)>T1(M2).SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Organic electroluminescent elements (hereinafter sometimes referred to as "organic EL elements") are used in full-color displays such as those for mobile phones and televisions. When a voltage is applied to an organic EL element, holes are injected from the anode into the light-emitting layer, and electrons are injected from the cathode into the light-emitting layer. The injected holes and electrons then recombine in the light-emitting layer to form excitons. At this time, according to the statistical laws of electron spin, singlet excitons are generated at a rate of 25% and triplet excitons at a rate of 75%. In order to improve the performance of organic EL devices, for example, Patent Documents 1 and 2 have investigated various compounds to be used in organic EL devices. The performance of an organic EL element includes, for example, brightness, emission wavelength, chromaticity, luminous efficiency, driving voltage, and lifespan. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2021 / 049651 [Patent Document 2] Japanese Patent Application Publication No. 2019-161218 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide an organic electroluminescence element with improved performance. Another object of the present invention is to provide an organic electroluminescence element with improved luminous efficiency, and to provide an electronic device equipped with the organic electroluminescence element. [Means for solving the problem]

[0005] According to one aspect of the present invention, there is provided an organic electroluminescence device comprising an anode, a cathode, an emission band disposed between the anode and the cathode, and a hole blocking layer disposed between the emission band and the cathode, wherein the hole blocking layer contains a first hole blocking layer material and a second hole blocking layer material, the second hole blocking layer material being a compound that exhibits fluorescent emission with a maximum peak wavelength of 500 nm or less, the emission band containing an emission band material, and wherein triplet energy T1(M1) of the first hole blocking layer material and triplet energy T1(M2) of the emission band material satisfy the relationship shown in the following mathematical formula (Mathematical Formula 1). T1(M1)>T1(M2) ... (Number 1)

[0006] 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]

[0007] According to one aspect of the present invention, an organic electroluminescence element with improved performance can be provided. Furthermore, according to another aspect of the present invention, an organic electroluminescence element with improved luminous efficiency can be provided. Furthermore, according to another aspect of the present invention, an electronic device incorporating the organic electroluminescence element can be provided. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing a schematic configuration of an example of an organic EL element according to an embodiment of the present invention. [Figure 2] FIG. 2 is a diagram showing a schematic configuration of another example of an organic EL element according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Definition] In this specification, hydrogen atoms include isotopes with different numbers of neutrons, namely protium, deuterium, and tritium.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] "Substituents described herein" The substituents described in this specification will be explained below.

[0017] 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.

[0018] "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.

[0019] 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).

[0020] [ka]

[0021] [ka]

[0022] 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.

[0023] "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.

[0024] 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).

[0025] 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).

[0026] 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, 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.

[0027] Unsubstituted heterocyclic groups containing an oxygen atom (specific example group G2A2): a 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.

[0028] Unsubstituted heterocyclic groups containing a sulfur atom (specific example group G2A3): 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).

[0029] 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):

[0030] [ka]

[0031] [ka]

[0032] 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.

[0033] 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, a phenylquinazolinyl group, and a biphenylylquinazolinyl group.

[0034] 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].

[0035] 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].

[0036] 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):

[0037] The "one or more hydrogen atoms of the monovalent heterocyclic group" refers to a hydrogen atom bonded to a ring-forming carbon atom of the monovalent heterocyclic group, X A and Y A a hydrogen atom bonded to a nitrogen atom when at least one of A and Y A or more hydrogen atoms selected from the hydrogen atoms of a methylene group when one of the groups is CH2.

[0038] "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.

[0039] 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.

[0040] Substituted alkyl groups (specific example group G3B): heptafluoropropyl group (including isomers), pentafluoroethyl group, 2,2,2-trifluoroethyl group, and Trifluoromethyl group.

[0041] "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.

[0042] Unsubstituted alkenyl groups (specific example group G4A): vinyl groups, Allyl groups, a 1-butenyl group, 2-butenyl group, and 3-butenyl group.

[0043] 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.

[0044] "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.

[0045] Unsubstituted alkynyl groups (specific example group G5A): Ethynyl group.

[0046] "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.

[0047] 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.

[0048] Substituted cycloalkyl groups (specific example group G6B): 4-methylcyclohexyl group.

[0049] -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.

[0050] -O-(R 904 ) a group represented by -O-(R904 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.

[0051] -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.

[0052] -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.

[0053] "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.

[0054] "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.

[0055] "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.

[0056] "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.

[0057] "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.

[0058] "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.

[0059] "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.

[0060] "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.

[0061] "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.

[0062] 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.

[0063] 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.

[0064] In this specification, a carbazolyl group is specifically any of the following groups, unless otherwise specified in this specification.

[0065] [ka]

[0066] In this specification, unless otherwise specified in this specification, a (9-phenyl)carbazolyl group specifically means any of the following groups:

[0067] [ka]

[0068] In the general formulae (TEMP-Cz1) to (TEMP-Cz9), * represents a bonding position.

[0069] In this specification, a dibenzofuranyl group and a dibenzothiophenyl group are specifically any of the following groups, unless otherwise specified in this specification.

[0070] [ka]

[0071] In the general formulae (TEMP-34) to (TEMP-41), * represents a bonding position.

[0072] Unless otherwise specified herein, the substituted or unsubstituted alkyl group described herein is preferably a methyl group, an ethyl group, a propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a t-butyl group, or the like.

[0073] "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.

[0074] "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.

[0075] "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.

[0076] 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).

[0077] [ka]

[0078] [ka]

[0079] 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.

[0080] [ka]

[0081] 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.

[0082] [ka]

[0083] 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.

[0084] 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).

[0085] [ka]

[0086] [ka]

[0087] [ka]

[0088] In the general formulae (TEMP-69) to (TEMP-82), Q1 to Q9 each independently represent a hydrogen atom or a substituent.

[0089] [ka]

[0090] [ka]

[0091] [ka]

[0092] [ka]

[0093] In the general formulae (TEMP-83) to (TEMP-102), Q1 to Q8 each independently represent a hydrogen atom or a substituent.

[0094] The above is the explanation of "substituents described in this specification."

[0095] - "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.

[0096] [ka]

[0097] 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," the 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.

[0098] 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).

[0099] [ka]

[0100] When a "set of two or more adjacent units" forms a ring, it does not only mean that a set of two adjacent units is bonded, as in the previous example, but also that 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.

[0101] [ka]

[0102] 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.

[0103] 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

[0104] 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.

[0105] 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").

[0106] 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 a group selected from the group consisting of unsubstituted heterocyclic groups having 5 to 50 ring atoms, 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, It is 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 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, R 903 If there are two or more, there are two or more R903 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.

[0107] 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 The group is selected from the group consisting of heterocyclic groups having 5 to 50 ring atoms.

[0108] 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 The group is selected from the group consisting of heterocyclic groups having 5 to 18 ring atoms.

[0109] 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."

[0110] 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.

[0111] 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.

[0112] In this specification, the expression "A≧B" means that the value of A is equal to the value of B, or the value of A is greater than the value of B. In this specification, the expression "A≦B" means that the value of A is equal to the value of B, or the value of A is smaller than the value of B.

[0113] First Embodiment [Organic electroluminescence element] The organic electroluminescence device according to this embodiment includes an anode, a cathode, an emission band disposed between the anode and the cathode, and a hole blocking layer disposed between the emission band and the cathode, wherein the hole blocking layer contains a first hole blocking layer material and a second hole blocking layer material, the second hole blocking layer material being a compound that exhibits fluorescent emission with a maximum peak wavelength of 500 nm or less, the emission band containing an emission band material, and a triplet energy T1(M1) of the first hole blocking layer material and a triplet energy T1(M2) of the emission band material satisfy the relationship shown in the following formula (1): T1(M1)>T1(M2) ... (Number 1)

[0114] The organic electroluminescent device according to this embodiment has a hole-blocking layer containing a compound that exhibits fluorescent emission with a maximum peak wavelength of 500 nm or less (hereinafter, may be referred to as a "fluorescent compound"), thereby facilitating electron injection into the emission band and improving luminous efficiency.

[0115] Furthermore, in the organic electroluminescent device according to this embodiment, the triplet energy T1(M1) of the first hole-blocking layer material is greater than the triplet energy T1(M2) of the emission band material. Therefore, by disposing the hole-blocking layer on the cathode side of the emission band, triplet excitons generated by recombination of holes and electrons in the emission band can be confined within the emission band. As a result, the TTF mechanism is promoted in the emission band, improving luminous efficiency. Furthermore, by including a light-emitting material (a compound exhibiting fluorescent emission with a maximum peak wavelength of 500 nm or less) in the hole-blocking layer, the energy of triplet excitons that are not confined within the emission band and leak into the hole-blocking layer can be converted into luminescent energy via the light-emitting material. As a result, the organic electroluminescent device according to this embodiment, which includes a light-emitting material, has higher luminous efficiency than a hole-blocking layer that does not include a light-emitting material.

[0116] Here, the TTF mechanism will be explained. Triplet-Triplet-Annihilation (sometimes referred to as TTA) has been known as a technique for improving the luminous efficiency of organic electroluminescence devices. TTA is a mechanism in which triplet excitons collide with other triplet excitons to generate singlet excitons. The TTA mechanism is also sometimes referred to as the TTF mechanism. TTF is an abbreviation for Triplet-Triplet Fusion.

[0117] The TTF phenomenon will be explained in more detail. Holes injected from the anode and electrons injected from the cathode recombine in the light-emitting layer to generate excitons. As has been conventionally known, the spin state of these excitons is 25% singlet excitons and 75% triplet excitons. In conventional fluorescent elements, 25% of the singlet excitons emit light when they relax to the ground state, but the remaining 75% of the triplet excitons return to the ground state through a thermal deactivation process without emitting light. Therefore, the theoretical limit of the internal quantum efficiency of conventional fluorescent elements was said to be 25%. On the other hand, the behavior of triplet excitons generated inside organic materials has been theoretically investigated. According to S.M. Bachilo et al. (J.Phys.Chem.A,104,7711(2000)), assuming that higher-order excitons such as quintets immediately return to triplets, triplet excitons (hereinafter referred to as triplet excitons) 3 A * When the density of triplet excitons (hereinafter referred to as triplet excitons) increases, triplet excitons collide with each other, causing the reaction shown in the following formula: 1 A represents the ground state, 1 A * represents the lowest excited singlet exciton. 3 A * + 3 A * →(4 / 9) 1 A+(1 / 9) 1 A * +(13 / 9) 3 A * That is, 5 3 A * →4 1 A+1A * It is predicted that 1 / 5, or 20%, of the 75% of triplet excitons initially generated will convert to singlet excitons. Therefore, the singlet excitons contributing to light are 40%, calculated by adding 75% × (1 / 5) = 15% to the initially generated 25%. In this case, the TTF ratio (TTF ratio) of the total luminescence intensity is 15 / 40, or 37.5%. Furthermore, if we assume that singlet excitons are generated by collisions between the initially generated 75% triplet excitons (i.e., one singlet exciton is generated from two triplet excitons), then an extremely high internal quantum efficiency of 62.5% is obtained by adding 75% × (1 / 2) = 37.5% to the initially generated 25% singlet excitons. In this case, the TTF ratio is 37.5 / 62.5 = 60%.

[0118] (Triplet energy T1) The triplet energy T1 can be measured by the following method. The compound to be measured was dissolved in EPA (diethyl ether: isopentane: ethanol = 5:5:2 (volume ratio)) at 10 -5mol / L or more 10 -4 A solution is prepared by dissolving the compound to a concentration of 0.1 mol / L or less, and this solution is placed in a quartz cell to be used as a measurement sample. The phosphorescence spectrum (vertical axis: phosphorescence intensity, horizontal axis: wavelength) of this measurement sample is measured at low temperature (77 [K]), and a tangent line is drawn to the rising edge of the short wavelength side of this phosphorescence spectrum, and the wavelength value λ at the intersection of this tangent line and the horizontal axis is determined. edge Based on [nm], the amount of energy calculated using the following conversion formula (F1) is taken as the triplet energy T1. Conversion formula (F1): T1[eV]=1239.85 / λ edge

[0119] The tangent to the rising edge of the phosphorescence spectrum on the short wavelength side is drawn as follows: When moving along the spectral curve from the short wavelength side of the phosphorescence spectrum to the shortest maximum of the spectral maxima, consider the tangent at each point on the curve toward the long wavelength side. The slope of this tangent increases as the curve rises (i.e., as the vertical axis increases). The tangent drawn at the point where this slope is at its maximum (i.e., the tangent at the inflection point) is the tangent to the rising edge of the phosphorescence spectrum on the short wavelength side. Note that a maximum point having a peak intensity that is 15% or less of the maximum peak intensity of the spectrum is not included in the above-mentioned maximum value on the shortest wavelength side, and the tangent drawn at the point where the slope value is the maximum value that is closest to the maximum value on the shortest wavelength side is defined as the tangent to the rising edge on the short wavelength side of the phosphorescence spectrum. Phosphorescence can be measured using an F-4500 spectrofluorometer manufactured by Hitachi High-Tech Science Corp. However, the measuring device is not limited to this, and measurements may be performed by combining a cooling device, a cryogenic container, an excitation light source, and a light-receiving device.

[0120] In the organic EL device according to this embodiment, it is preferable that the triplet energy T1(M1) of the first hole-blocking layer material and the triplet energy T1(M2) of the emission band material satisfy the relationship of the following mathematical formula (Mathematical Formula 1A). T1(M1)-T1(M2)>0.03eV …(Math 1A)

[0121] (Structure of organic EL element) The organic EL device according to this embodiment preferably includes at least one light-emitting unit between a cathode and an anode. The light-emitting unit includes one or more layers, and at least one of the layers included in the light-emitting unit is preferably an light-emitting layer. The light-emitting unit may include, in addition to the light-emitting layer, one or more layers containing at least one selected from the group consisting of an organic compound and an inorganic material. The inorganic material is at least one of an inorganic compound and a simple substance. The light-emitting unit preferably includes one or more layers selected from the group consisting of a layer composed of an organic compound, a layer composed of an inorganic material, and a layer composed of both an organic compound and an inorganic material. In addition to the light-emitting layer, examples of layers that the light-emitting unit may include include layers that can be used in organic EL devices. Layers that can be used in organic EL devices are not particularly limited, and examples include at least one layer selected from the group consisting of a hole injection layer, a hole transport layer, an electron injection layer, an electron transport layer, and a blocking layer. Examples of blocking layers include a hole blocking layer and an electron blocking layer. The light-emitting unit may also include an emissive zone including an emissive layer, a hole-transporting zone disposed between the emissive zone and the anode, and an electron-transporting zone disposed between the emissive zone and the cathode, each zone including one or more layers. The organic EL device according to this embodiment has an emitting unit including an emitting zone and a hole blocking layer between a cathode and an anode.

[0122] In the organic EL device according to this embodiment, it is preferable that the light-emitting region and the hole-blocking layer are in direct contact with each other. In the organic electroluminescent device according to this embodiment, when the emission band and the hole blocking layer are in direct contact with each other, triplet excitons are easily confined in the emission band, which further promotes the TTF mechanism in the emission band and facilitates improvement of luminous efficiency.

[0123] The organic EL device according to this embodiment preferably has an electron transporting region disposed between the hole blocking layer and the cathode, and in this case, the hole blocking layer and the electron transporting region are preferably in direct contact with each other. In the organic EL device according to this embodiment, the electron transporting region preferably has one or more electron transport layers, and the electron transporting region preferably has one or more electron injection layers.

[0124] The organic EL device according to this embodiment also preferably has a hole-transporting zone disposed between the anode and the light-emitting zone. In the organic EL device according to this embodiment, the hole transport region preferably has one or more hole transport layers, and the hole transport region preferably has one or more hole injection layers.

[0125] FIG. 1 shows a schematic configuration of an example of an organic EL element according to this embodiment. The organic EL device 1 includes a substrate 2, an anode 3, a cathode 4, and an emitting unit 10 disposed between the anode 3 and the cathode 4. The emitting unit 10 is configured by stacking a hole-transporting region 6, an emitting region 5, a hole-blocking layer 70, and an electron-transporting region 7 in this order from the anode 3 side. The hole-transporting region 6 includes a hole-injection layer 61, a hole-transporting layer 62, and an electron-blocking layer 63. The emitting region 5 includes a first emitting layer 51 and a second emitting layer 52. The electron-transporting region 7 includes an electron-transporting layer 71 and an electron-injection layer 72. The emitting region 5 of the organic EL device 1 includes the first emitting layer 51 on the anode 3 side and the second emitting layer 52 on the cathode 4 side.

[0126] FIG. 2 shows a schematic configuration of another example of the organic EL element according to this embodiment. The organic EL device 1A includes a substrate 2, an anode 3, a cathode 4, and an emitting unit 10A disposed between the anode 3 and the cathode 4. The emitting unit 10A includes a hole-transporting region 6, an emitting region 5, a hole-blocking layer 70, and an electron-transporting region 7A stacked in this order from the anode 3 side. The hole-transporting region 6 includes a hole-injection layer 61, a hole-transporting layer 62, and an electron-blocking layer 63. The emitting region 5 includes a first emitting layer 51 and a second emitting layer 52. The electron-transporting region 7A includes a first electron-transporting layer 71A, a second electron-transporting layer 72A, and an electron-injection layer 73A. The emitting region 5 of the organic EL device 1A includes the first emitting layer 51 on the anode 3 side and the second emitting layer 52 on the cathode 4 side. The electron-transporting region 7A of the organic EL device 1A includes a first electron-transporting layer 71A on the anode 3 side and a second electron-transporting layer 72A on the cathode 4 side.

[0127] The organic EL element according to this embodiment is not limited to the configuration of the organic EL element shown in FIGS. An example of an organic EL element having a different configuration is an organic EL element including an organic layer in which a hole injection layer, a hole transport layer, a second light-emitting layer, a first light-emitting layer, an electron transport layer, and an electron injection layer are stacked in this order from the anode side.

[0128] The structure of the organic EL element will be further described below. Hereinafter, the reference numerals may be omitted.

[0129] (Emission band) In the organic EL device according to this embodiment, the emission zone is disposed between the anode and the cathode. In one aspect of the organic EL device according to this embodiment, the emission zone comprises one or more light-emitting layers.

[0130] In the organic EL device according to this embodiment, the emission band contains an emission band material. In this specification, the term "emission band material" does not refer to all materials contained in the emission band, but refers to at least one of the materials contained in the emission band. It is preferable that at least one of the light-emitting layers in the emission band contains the emission band material.

[0131] In one aspect of the organic EL device according to this embodiment, the emission band includes a first emission layer and a second emission layer. In this case, the second emission layer may be disposed between the cathode and the first emission layer. That is, the organic EL device according to this embodiment may include an anode, a first emission layer, a second emission layer, and a cathode, in this order. The second light-emitting layer may be disposed between the anode and the first light-emitting layer, i.e., the organic EL device according to this embodiment may include an anode, a second light-emitting layer, a first light-emitting layer, and a cathode in this order. In the organic EL device according to this embodiment, the second light-emitting layer is preferably disposed between the cathode and the first light-emitting layer.

[0132] In the organic EL device according to this embodiment, it is also preferable that a first light-emitting layer, a second light-emitting layer, and a hole-blocking layer are laminated in this order from the anode side.

[0133] When the organic EL device according to this embodiment includes a first emitting layer and a second emitting layer, it is preferable that one of the first emitting layer and the second emitting layer is the layer disposed closest to the cathode among the multiple layers in the emission band. In the organic EL device according to this embodiment, the second light-emitting layer is more preferably the layer disposed closest to the cathode among the multiple layers in the light-emitting band.

[0134] In the organic EL device according to this embodiment, the second light-emitting layer and the hole-blocking layer are preferably in direct contact with each other.

[0135] When the organic EL device according to this embodiment includes a first light-emitting layer and a second light-emitting layer, it is preferable that at least one of the first light-emitting layer and the second light-emitting layer contains an emission band material.

[0136] In the organic EL device according to this embodiment, it is preferable that the first emitting layer contains a first host material and a first emitting compound, and the second emitting layer contains a second host material and a second emitting compound.

[0137] In the organic EL device according to this embodiment, the second host material is preferably an emission band material.

[0138] In the organic EL device according to this embodiment, it is preferable that the triplet energy T1(H1) of the first host material and the triplet energy T1(H2) of the second host material satisfy the relationship of the following mathematical formula (Mathematical Formula 2). T1(H1)>T1(H2) ... (Number 2)

[0139] When the organic EL device according to this embodiment includes a first light-emitting layer and a second light-emitting layer, triplet excitons generated by recombination of holes and electrons in the first light-emitting layer are thought to be less likely to be quenched at the interface between the first light-emitting layer and the organic layer, even if excess carriers are present at the interface between the first light-emitting layer and the organic layer that is in direct contact with the first light-emitting layer. For example, when the recombination region is locally present at the interface between the first light-emitting layer and the hole-transporting layer or the electron-blocking layer, quenching by excess electrons is thought to occur. On the other hand, when the recombination region is locally present at the interface between the first light-emitting layer and the electron-transporting layer or the hole-blocking layer, quenching by excess holes is thought to occur. The organic EL device according to this embodiment includes at least two light-emitting layers (i.e., a first light-emitting layer and a second light-emitting layer) that satisfy a predetermined relationship, and the triplet energy T1(H1) of the first host material in the first light-emitting layer and the triplet energy T1(H2) of the second host material in the second light-emitting layer satisfy the relationship represented by the above-described mathematical formula (Mathematical Formula 2). By providing the first and second light-emitting layers so as to satisfy the relationship of the above mathematical formula (Mathematical Formula 2), triplet excitons generated in the first light-emitting layer can migrate to the second light-emitting layer without being quenched by excess carriers, and reverse migration from the second light-emitting layer to the first light-emitting layer can be suppressed. As a result, the TTF mechanism is exerted in the second light-emitting layer, singlet excitons are efficiently generated, and luminous efficiency is improved. In this way, the organic EL device has a first emitting layer that mainly generates triplet excitons and a second emitting layer that mainly exhibits the TTF mechanism by utilizing triplet excitons transferred from the first emitting layer, as distinct regions, and uses a compound having a smaller triplet energy than the first host material in the first emitting layer as the second host material in the second emitting layer, thereby creating a difference in triplet energy, thereby improving the luminous efficiency.

[0140] In the organic EL device according to this embodiment, it is preferable that the triplet energy T1(H1) of the first host material and the triplet energy T1(H2) of the second host material satisfy the relationship of the following mathematical formula (Mathematical Formula 2A). T1(H1)-T1(H2)>0.03eV …(Math 2A)

[0141] In the organic EL device according to this embodiment, it is preferable that the triplet energy T1(M1) of the first hole-blocking layer material and the triplet energy T1(H2) of the second host material satisfy the relationship shown in the following formula (Mathematical Formula 3). T1(M1)>T1(H2) ... (Equation 3)

[0142] In the organic EL device according to this embodiment, the triplet energy T1(M1) of the first hole-blocking layer material is greater than the triplet energy T1(H2) of the second host material serving as the emission band material. Thus, when the first hole-blocking layer material and the second host material satisfy the relationship of Equation 3, triplet excitons transferred to the second emitting layer can be confined in the second emitting layer. As a result, the TTF mechanism is promoted in the second emitting layer, improving the luminous efficiency.

[0143] In the organic EL device according to this embodiment, the triplet energy T1(H1) of the first host material may be greater than the triplet energy T1(M1) of the first hole-blocking layer material. Furthermore, in the organic EL device according to this embodiment, the triplet energy T1(H1) of the first host material may be less than the triplet energy T1(M1) of the first hole-blocking layer material. Furthermore, in the organic EL device according to this embodiment, the triplet energy T1(H1) of the first host material may be equal to the triplet energy T1(M1) of the first hole-blocking layer material.

[0144] In one aspect of the organic EL device according to this embodiment, the emission band includes a first emission layer and a second emission layer, the first emission layer contains a first host material and a first emission compound, the second emission layer contains a second host material and a second emission compound, the second host material is an emission band material, the first emission compound is a compound that exhibits fluorescent emission with a maximum peak wavelength of 500 nm or less, the second emission compound is a compound that exhibits fluorescent emission with a maximum peak wavelength of 500 nm or less, the triplet energy T1(H1) of the first host material and the triplet energy T1(H2) of the second host material satisfy the relationship of the above mathematical formula (Mathematical Formula 2), and the triplet energy T1(M1) of the first hole-blocking layer material and the triplet energy T1(H2) of the second host material satisfy the relationship of the above mathematical formula (Mathematical Formula 3).

[0145] In the organic EL device according to this embodiment, it is also preferable that the first host material and the first hole blocking layer material are the same.

[0146] In the organic EL device according to this embodiment, it is also preferable that the first host material and the first hole blocking layer material are different from each other.

[0147] In the organic EL device according to this embodiment, it is also preferable that the first light-emitting compound, the second light-emitting compound, and the second hole-blocking layer material are the same as each other.

[0148] In the organic EL device according to this embodiment, it is also preferable that the first light-emitting compound, the second light-emitting compound, and the second hole-blocking layer material are different from each other.

[0149] (hole blocking layer) In one aspect of the organic EL device according to this embodiment, the hole blocking layer contains a first hole blocking layer material and a second hole blocking layer material. The hole blocking layer is a layer that prevents excitons generated in the light-emitting layer from migrating to a layer (e.g., an electron transport layer or an electron injection layer) closer to the cathode than the hole blocking layer, so as to prevent excitation energy from leaking from the light-emitting layer to a peripheral layer. The hole blocking layer is also preferably a layer that transports electrons and prevents holes from reaching a layer (for example, an electron transport layer) that is closer to the cathode than the hole blocking layer.

[0150] (First Hole Blocking Layer Material) In one aspect of the organic EL device according to this embodiment, the first hole blocking layer material is represented by the following formula (HB11), (HB12), (HB13), (HB14), (HB15), or (HB16).

[0151] (Compound represented by formula (HB11)) The compound represented by formula (HB11) will be described.

[0152] [ka]

[0153] (In the formula (HB11), R 101 ~R 110 , and R 111 ~R 120 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, However, R 101 ~R 110 One of them is L 101 indicates the bond position with R 111 ~R 120 One of them is L 101 indicates the bonding position with L 101 teeth, single bond, a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms, ma is 0, 1, 2, 3, 4 or 5; L 101 If there are two or more, there are two or more L 101 are either identical or different.)

[0154] In the first hole blocking layer material, R 901 , R 902 , R 903 , R 904 , R 905 , R 931 , R 932 , R 933 , R 934 , R 935 , R 936 , R 937 , R 938 , R 939 , R 940 , R 801 and R 802 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are multiple R 901 are the same or different from each other, R 902 If there are multiple R 902 are the same or different from each other, R 903 If there are multiple R 903 are the same or different from each other, R 904 If there are multiple R 904 are the same or different from each other, R 905 If there are multiple R 905are the same or different from each other, R 931 If there are multiple R 931 are the same or different from each other, R 932 If there are multiple R 932 are the same or different from each other, R 933 If there are multiple R 933 are the same or different from each other, R 934 If there are multiple R 934 are the same or different from each other, R 935 If there are multiple R 935 are the same or different from each other, R 936 If there are multiple R 936 are the same or different from each other, R 937 If there are multiple R 937 are the same or different from each other, R 938 If there are multiple R 938 are the same or different from each other, R 939 If there are multiple R 939 are the same or different from each other, R 940 If there are multiple R 940 are the same or different from each other, R 801 If there are multiple R 801 are the same or different from each other, R 802 If there are multiple R 802 are the same or different from each other.

[0155] In one aspect of the organic EL device according to this embodiment, the compound represented by formula (HB11) is a compound represented by formula (HB111) below.

[0156] [ka]

[0157] (In the formula (HB111), R 101 , R 102 , R 104 ~R 110 , and R 111 ~R 119 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L 101 and ma respectively represent L in the formula (HB11). 101 and ma.)

[0158] In one aspect of the organic EL device according to this embodiment, ma is 1 or 2.

[0159] In one aspect of the organic EL element according to this embodiment, L 101 represents a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms.

[0160] In one aspect of the organic EL device according to this embodiment, the first hole blocking layer material is a compound having only two pyrene rings in the molecule (sometimes referred to as a bispyrene compound). In one aspect of the organic EL device according to this embodiment, the compound represented by formula (HB11) is a bispyrene compound.

[0161] (Compound represented by formula (HB12)) The compound represented by formula (HB12) will be described.

[0162] [ka]

[0163] (In the formula (HB12), R 121 ~R 130 , Ar 121 and Ar 122 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R905 ) 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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms; a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or is a group represented by the formula (HB121), However, R 121 ~R 130 , Ar 121 and Ar 122 at least one of is a group represented by the formula (HB121), When a plurality of groups represented by the formula (HB121) are present, the plurality of groups represented by the formula (HB121) are the same or different from each other, L 102 teeth, single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar 102 teeth, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, mb is 0, 1, 2, 3, 4 or 5; L 102 If there are two or more, there are two or more L 102 are identical to or different from each other, Ar 102 If there are two or more, there are two or more Ar 102 are identical to or different from each other, The * in the formula (HB121) indicates the bonding position to the benz[a]anthracene ring in the formula (HB12).

[0164] In one aspect of the organic EL element according to this embodiment, Ar 121 and Ar 122 At least one of the above is a group represented by the formula (HB121).

[0165] In one aspect of the organic EL device according to this embodiment, the compound represented by formula (HB12) is a compound represented by formula (HB122) or (HB123) below.

[0166] [ka]

[0167] (In the formulas (HB122) and (HB123), R 121 ~R 130 , Ar 121 and Ar 122 are, respectively, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L 102 , Ar 102 and mb are L in the formula (HB121), respectively. 102 , Ar 102 and mb.)

[0168] In one aspect of the organic EL device according to this embodiment, mb is 0, 1, or 2. In the organic EL device according to this embodiment, mb is preferably 0.

[0169] In the organic EL element according to this embodiment, it is also preferable that mb is 1. In this case, L 102 is preferably a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, and more preferably a substituted or unsubstituted arylene group having 6 to 14 ring carbon atoms.

[0170] In the organic EL element according to this embodiment, Ar 102 is preferably a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, and more preferably a substituted or unsubstituted heterocyclic group having 5 to 17 ring atoms.

[0171] In the organic EL element according to this embodiment, Ar102 is also preferably a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, and more preferably a substituted or unsubstituted aryl group having 6 to 18 ring carbon atoms.

[0172] (Compound represented by formula (HB13)) The compound represented by formula (HB13) will be described.

[0173] [ka]

[0174] (In the formula (HB13), R 131 ~R 140 , and R 141 ~R 150 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -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 -B(OR 938 )(OR939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, However, R 131 ~R 140 One of them is L 103 indicates the bond position with R 141 ~R 150 One of them is L 103 indicates the bonding position with L 103 teeth, single bond, a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms, mc is 0, 1, 2, 3, 4 or 5; L 103 If there are two or more, there are two or more L 103 are either identical or different.)

[0175] In one aspect of the organic EL device according to this embodiment, the compound represented by formula (HB13) is a compound represented by formula (HB131) below.

[0176] [ka]

[0177] (In the formula (HB131), R 131 ~R 138 , R140 , R 141 ~R 148 , and R 150 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L 103 and mc are the L in the formula (HB13), respectively. 103 and mc.)

[0178] In one aspect of the organic EL element according to this embodiment, mc is 1 or 2.

[0179] In one aspect of the organic EL element according to this embodiment, L 103 represents a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms.

[0180] (Compound represented by formula (HB14)) The compound represented by formula (HB14) will be explained.

[0181] [ka]

[0182] (In the formula (HB14), R 151 ~R 162 , and R 163 ~R 174 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, However, R 151 ~R 162 One of them is L 104 indicates the bond position with R 163 ~R 174 One of them is L 104 indicates the bonding position with L 104 teeth, single bond, a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms, md is 0, 1, 2, 3, 4 or 5; L 104 If there are two or more, there are two or more L 104 are either identical or different.)

[0183] In one aspect of the organic EL device according to this embodiment, the compound represented by formula (HB14) is a compound represented by formula (HB141) below.

[0184] [ka]

[0185] (In the formula (HB141), R 151 ~R 155 , R 157 ~R 162 , and R 163 ~R 173 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L 104 and md are the L in the formula (HB14), respectively. 104 and md.)

[0186] In one aspect of the organic EL element according to this embodiment, md is 1 or 2.

[0187] In one aspect of the organic EL element according to this embodiment, L 104 represents a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms.

[0188] In one aspect of the organic EL element according to this embodiment, L 104 represents a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms.

[0189] In one aspect of the organic EL element according to this embodiment, L104 represents a substituted or unsubstituted arylene group having 6 to 14 ring carbon atoms or a substituted or unsubstituted divalent heterocyclic group having 5 to 13 ring atoms.

[0190] (Compound represented by formula (HB15)) The compound represented by formula (HB15) will be described.

[0191] [ka]

[0192] (In the formula (HB15), R 176 ~R 187 , and R 188 ~R 199 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, However, R 176 ~R 187 One of them is L 105 indicates the bond position with R 188 ~R 199 One of them is L 105 indicates the bonding position with L 105 teeth, single bond, a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms, me is 0, 1, 2, 3, 4 or 5; L 105 If there are two or more, there are two or more L 105 are either identical or different.)

[0193] In one aspect of the organic EL device according to this embodiment, the compound represented by formula (HB15) is a compound represented by formula (HB151) below.

[0194] [ka]

[0195] (In the formula (HB151), R 176 , R 177 , R 179 ~R 187, R 188 , and R 190 ~R 199 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L 105 and me respectively represent L in the formula (H15). 105 and me.)

[0196] In one aspect of the organic EL device according to this embodiment, me is 1 or 2.

[0197] In one aspect of the organic EL element according to this embodiment, L 105 represents a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms.

[0198] In one aspect of the organic EL element according to this embodiment, L105 represents a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms.

[0199] (Compound represented by formula (HB16)) The compound represented by formula (HB16) will be explained.

[0200] [ka] (In the formula (HB16), R 201 ~R 210 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms; a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or is a group represented by the formula (HB160), However, R 201 ~R 210 at least one of is a group represented by the formula (HB160), When a plurality of groups represented by the formula (HB160) are present, the plurality of groups represented by the formula (HB160) are the same or different from each other, L 106 teeth, single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar 106 teeth, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, mf is 0, 1, 2, 3, 4 or 5; L 106 If there are two or more, there are two or more L 106 are identical to or different from each other, Ar 106 If there are two or more, there are two or more Ar 106 are identical to or different from each other, The symbol * in the formula (HB160) indicates the bonding position to the pyrene ring in the formula (HB16). (In the formulae (HB11), (HB12), (HB13), (HB14), (HB15), and (HB16), R 901 , R 902 , R 903 , R904 , R 905 , R 931 , R 932 , R 933 , R 934 , R 935 , R 936 , R 937 , R 938 , R 939 , R 940 , R 801 and R 802 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are multiple R 901 are the same or different from each other, R 902 If there are multiple R 902 are the same or different from each other, R 903 If there are multiple R 903 are the same or different from each other, R 904 If there are multiple R 904 are the same or different from each other, R 905 If there are multiple R 905 are the same or different from each other, R 931 If there are multiple R 931 are the same or different from each other, R 932 If there are multiple R 932 are the same or different from each other, R 933 If there are multiple R 933 are the same or different from each other, R 934If there are multiple R 934 are the same or different from each other, R 935 If there are multiple R 935 are the same or different from each other, R 936 If there are multiple R 936 are the same or different from each other, R 937 If there are multiple R 937 are the same or different from each other, R 938 If there are multiple R 938 are the same or different from each other, R 939 If there are multiple R 939 are the same or different from each other, R 940 If there are multiple R 940 are the same or different from each other, R 801 If there are multiple R 801 are the same or different from each other, R 802 If there are multiple R 802 are either identical or different.)

[0201] In one aspect of the organic EL device according to this embodiment, R 204 is a group represented by the formula (HB160).

[0202] In one aspect of the organic EL element according to this embodiment, L 106 is a single bond or a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, and Ar 106 is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.

[0203] In one aspect of the organic EL element according to this embodiment, L 106is a single bond or a substituted or unsubstituted arylene group having 6 to 14 ring carbon atoms, and Ar 106 is a substituted or unsubstituted aryl group having 6 to 14 ring carbon atoms.

[0204] In one aspect of the organic EL element according to this embodiment, L 106 is a single bond or a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, and Ar 106 is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0205] In one aspect of the organic EL element according to this embodiment, L 106 is a single bond or a substituted or unsubstituted arylene group having 6 to 14 ring carbon atoms, and Ar 106 is a substituted or unsubstituted heterocyclic group having 6 to 18 ring atoms.

[0206] In one aspect of the organic EL element according to this embodiment, L 106 is a single bond, and Ar 106 is 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.

[0207] In one aspect of the organic EL element according to this embodiment, L 106 is a single bond, and Ar 106 is a substituted or unsubstituted aryl group having 6 to 14 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 5 to 18 ring atoms.

[0208] In one aspect of the organic EL element according to this embodiment, the group represented by the formula (H160) is a group represented by the following formula (H161).

[0209] [ka]

[0210] (In the formula (HB161), X 16is an oxygen atom or a sulfur atom, L 106 and mf are the L in the formula (HB1160), respectively. 106 and mf, R 1600 ~R 1604 One or more pairs of adjacent pairs 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 does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring 1600 ~R 1604 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, Multiple R1600 are the same or different from each other, When a plurality of groups represented by the formula (HB161) are present, the plurality of groups represented by the formula (HB161) are the same or different from each other, The symbol * in the formula (HB161) indicates the bonding position to the pyrene ring in the formula (HB16).

[0211] In one aspect of the organic EL device according to this embodiment, the compound represented by formula (HB16) is a compound represented by formula (HB162): 204 When is a group represented by the formula (HB161), it is represented by the following formula (HB162).

[0212] [ka]

[0213] (In the formula (HB162), R 201 ~R 203 and R 205 ~R 210 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, X 16 , L 106 , mf, and R 1600 ~R 1604 respectively represent X in the formula (HB161). 16 , L 106 , mf, and R 1600 ~R 1604 is equivalent to

[0214] In one aspect of the organic EL device according to this embodiment, mf is 0, 1, or 2. In one aspect of the organic EL device according to this embodiment, when mf is 0, the compound represented by formula (HB162) is represented by formula (HB163) below.

[0215] [ka]

[0216] (In the formula (HB163), R 201 ~R 203 , R 205 ~R 210 , R 1600 ~R 1604 , and X 16 are R in the formula (HB162), respectively. 201 ~R 203 , R 205 ~R 210 , R 1600 ~R 1604 , and X 16 is equivalent to

[0217] In one aspect of the organic EL device according to this embodiment, the first hole blocking layer material is a compound having only one pyrene ring in the molecule (sometimes referred to as a monopyrene compound). In one aspect of the organic EL device according to this embodiment, the compound represented by formula (HB16) is a monopyrene compound.

[0218] In the organic EL device according to this embodiment, the first hole blocking layer material is preferably a compound represented by the formula (HB12).

[0219] In the organic EL device according to this embodiment, the first hole blocking layer material and the second hole blocking layer material preferably do not contain azine derivatives such as pyridine, pyrimidine, and triazine.

[0220] In the organic EL device according to this embodiment, it is also preferable that the hole blocking layer does not contain an azine derivative.

[0221] In one aspect of the organic EL device according to this embodiment, the first hole blocking layer material is a compound represented by the formula (HB12).

[0222] In one aspect of the organic EL device according to this embodiment, the first hole blocking layer material has one or more deuterium atoms. In one aspect of the organic EL device according to this embodiment, all of the hydrogen atoms in the first hole blocking layer material are deuterium.

[0223] In one aspect of the organic EL device according to this embodiment, the first hole blocking layer material does not have any deuterium atoms.

[0224] In one aspect of the organic EL device according to this embodiment, all of the groups described as "substituted or unsubstituted" in the first hole-blocking layer material are "unsubstituted" groups.

[0225] (Method for producing the first hole blocking layer material) The first hole blocking layer material can be produced by a known method. Alternatively, the first hole blocking layer material can be produced by following a known method and using known alternative reactions and raw materials tailored to the intended purpose.

[0226] (Specific Examples of Materials for the First Hole Blocking Layer) Specific examples of the first hole blocking layer material include the following compounds, compounds in which one or more hydrogen atoms in the following compounds are replaced with deuterium atoms, and compounds in which one or more deuterium atoms in the following compounds are replaced with hydrogen atoms. However, the first hole blocking layer material in the present invention is not limited to these specific examples. In the following specific examples, D represents a deuterium atom.

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[0410] (Second Hole Blocking Layer Material) The second hole blocking layer material is a compound that exhibits fluorescent emission with a maximum peak wavelength of 500 nm or less. In the organic EL device according to this embodiment, the maximum peak wavelength of the second hole blocking layer material is preferably 480 nm or less, and more preferably 475 nm or less. In the organic EL device according to this embodiment, the maximum peak wavelength of the second hole blocking layer material is preferably 430 nm or more, and more preferably 440 nm or more.

[0411] (maximum fluorescence emission peak wavelength) In this specification, the maximum peak wavelength of fluorescent light may be referred to as the maximum peak wavelength of fluorescent light. The maximum fluorescence emission peak wavelength in this specification can be measured in accordance with the method described below.

[0412] (Compound represented by formula (6)) In the organic EL device according to this embodiment, it is preferable that at least one selected from the group consisting of the first light-emitting compound, the second light-emitting compound, and the second hole-blocking layer material is represented by the following formula (6):

[0413] In the organic EL device according to this embodiment, the first light-emitting compound, the second light-emitting compound, and the second hole-blocking layer material are more preferably each independently represented by the following formula (6):

[0414] In one aspect of the organic EL device according to this embodiment, the second hole blocking layer material is represented by the following formula (6).

[0415] [ka]

[0416] (In the formula (6), Ring a, ring b and ring c each independently represent a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic ring having 5 to 50 ring atoms, R 601 and R 602 each independently bond to the ring a, the ring b, or the ring c to form a substituted or unsubstituted heterocycle, or do not form a substituted or unsubstituted heterocycle, R that does not form the substituted or unsubstituted heterocycle 601 and R 602 are each independently, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0417] At least one of the ring a, the ring b, and the ring c is —N(R 6A )(R 6B ) and has one or more groups represented by R 6A and R 6B are each independently, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 6A If there are two or more, there are two or more R 6A are identical to or different from each other, R 6B If there are two or more, there are two or more R 6B are preferably the same as or different from each other.

[0418] The rings a, b, and c are rings (substituted or unsubstituted aromatic hydrocarbon rings having 6 to 50 ring carbon atoms, or substituted or unsubstituted heterocyclic rings having 5 to 50 ring atoms) fused to the central fused two-ring structure of the formula (6) composed of a boron atom and two nitrogen atoms.

[0419] The "aromatic hydrocarbon rings" of rings a, b, and c have the same structure as the compounds in which a hydrogen atom has been introduced into the above-mentioned "aryl group." The "aromatic hydrocarbon ring" of ring a contains the three carbon atoms on the central fused two-ring structure of formula (6) as ring-forming atoms. The "aromatic hydrocarbon ring" of ring b and ring c contains the two carbon atoms on the central fused two-ring structure of formula (6) as ring-forming atoms.

[0420] Specific examples of the "substituted or unsubstituted aromatic hydrocarbon ring having 6 to 50 ring carbon atoms" include compounds in which a hydrogen atom has been introduced into the "aryl group" described in specific example group G1. The "heterocycles" of ring a, ring b, and ring c have the same structure as the compounds in which a hydrogen atom has been introduced into the above-mentioned "heterocyclic group." The "heterocycle" of ring a contains three carbon atoms on the central fused bicyclic structure of formula (6) as ring-forming atoms. The "heterocycle" of rings b and c contains two carbon atoms on the central fused bicyclic structure of formula (6) as ring-forming atoms. Specific examples of "substituted or unsubstituted heterocycles having 5 to 50 ring atoms" include compounds in which a hydrogen atom has been introduced into the "heterocyclic group" described in specific example group G2.

[0421] R 601 and R 602 may each independently bond to ring a, ring b, or ring c to form a substituted or unsubstituted heterocyclic ring. In this case, the heterocyclic ring contains the nitrogen atom on the central fused bicyclic structure of formula (6). In this case, the heterocyclic ring may contain a heteroatom other than the nitrogen atom. R 601 and R 602 is bonded to ring a, ring b, or ring c specifically means that an atom constituting ring a, ring b, or ring c is bonded to R 601 and R 602 It means that the atoms that make up R are bonded together. 601 is bonded to the a ring, and R 601 and ring a may be fused to form a two-ring (or three- or more-ring) fused nitrogen-containing heterocycle. Specific examples of the nitrogen-containing heterocycle include compounds corresponding to the nitrogen-containing two- or more-ring fused heterocyclic groups in specific example group G2. R 601 When is bonded to ring b, R 602 When R is bonded to ring a, 602 The same applies when is bonded to ring c.

[0422] In one embodiment, the ring a, ring b, and ring c in the formula (6) are each independently a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 50 ring carbon atoms. In one embodiment, the ring a, ring b, and ring c in the formula (6) are each independently a substituted or unsubstituted benzene ring or naphthalene ring.

[0423] In one embodiment, R in formula (6) 601 and R 602 are each independently, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, A substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms is preferred.

[0424] In one embodiment, the compound represented by formula (6) is a compound represented by formula (62):

[0425] [ka]

[0426] [(In the formula (62), R 601A is R 611 and R 624 to form a substituted or unsubstituted heterocycle, or not to form a substituted or unsubstituted heterocycle, R that does not form the substituted or unsubstituted heterocycle 601A teeth, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 602A is R 613 and R 631to form a substituted or unsubstituted heterocycle, or not to form a substituted or unsubstituted heterocycle, R that does not form the substituted or unsubstituted heterocycle 602A teeth, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms; a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or A group represented by the following formula (621): R 611 ~R 613 , R 621 ~R 624 , and R 631 ~R 634 One or more pairs of adjacent pairs 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 does not form the substituted or unsubstituted heterocyclic ring, does not form the substituted or unsubstituted monocyclic ring, and does not form the substituted or unsubstituted fused ring 611 ~R 613 , R 621 ~R 624 , and R 631 ~R 634 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 906 a group represented by -COOR 907 a group represented by -N(R 6A )(R 6B ) a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0427] [ka]

[0428] (In the formula (621), R 651 ~R 658 One or more pairs of adjacent pairs 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 does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring 651 ~R 658 One of them is the binding site with L6, R does not form the substituted or unsubstituted monocyclic ring, does not form the substituted or unsubstituted fused ring, and is not a bonding position with L 651 ~R 658 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 906 a group represented by -COOR 907 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 65A ~R 65B The set 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 does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring; 65A ~R 65B are each independently, a substituted or unsubstituted alkyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L6 is single bond, a substituted or unsubstituted alkylene group having 1 to 50 carbon atoms; 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, * 62 indicates the bonding position with the nitrogen atom, * 65 is R 651 ~R 658 indicates the bond position with one of the following:

[0429] In the second hole blocking layer material, R 901 , R 902 , R 903 , R 904 , R 905 , R 906 and 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 the same or different from each other, R 902 If there are multiple R 902 are the same or different from each other, R 903 If there are multiple R 903 are the same or different from each other, R 904 If there are multiple R 904 are the same or different from each other, R 905 If there are multiple R 905 are the same or different from each other, R 906 If there are multiple R 906are the same or different from each other, R 907 If there are multiple R 907 are the same or different from each other.

[0430] In the second hole blocking layer material, R 6A and R 6B are each independently, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 6A If there are two or more, there are two or more R 6A are identical to or different from each other, R 6B If there are two or more, there are two or more R 6B are preferably the same as or different from each other.

[0431] R in the formula (62) 601A and R 602A are R in the formula (6), respectively. 601 and R 602 is a group corresponding to For example, R 601A and R 611 may be bonded to form a two-ring (or three- or more-ring) nitrogen-containing heterocyclic ring in which a ring containing the ring is fused with a benzene ring corresponding to ring a. Specific examples of the nitrogen-containing heterocyclic ring include compounds corresponding to the nitrogen-containing two- or more-ring fused heterocyclic groups in specific example group G2. 601A and R 624 If R 602A and R 613 When R is bonded, 602A and R 631 The same applies when the two are combined.

[0432] R 611 ~R 613 , R 621 ~R 624 , and R 631 ~R634 One or more pairs of adjacent pairs of joined together to form a substituted or unsubstituted monocyclic ring, or They may be bonded to each other to form a substituted or unsubstituted fused ring. For example, R 611 and R 612 may be bonded to form a structure in which a benzene ring, an indole ring, a pyrrole ring, a benzofuran ring, a benzothiophene ring, or the like is fused to the six-membered ring to which they are bonded, and the fused ring formed is a naphthalene ring, a carbazole ring, an indole ring, a dibenzofuran ring, or a dibenzothiophene ring.

[0433] In one embodiment, R that does not contribute to ring formation 611 ~R 613 , R 621 ~R 624 , and R 631 ~R 634 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms; a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or -N(R 6A )(R 6B ) is a group represented by the formula:

[0434] In one embodiment, R that does not contribute to ring formation 611 ~R 613 , R 621 ~R 624 , and R 631 ~R 634 are each independently, hydrogen 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, or -N(R 6A )(R 6B ) is a group represented by the formula:

[0435] In one embodiment, R that does not contribute to ring formation 613 , R 621 ~R 624 , and R 631 ~R 634 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or -N(R 6A )(R 6B ) is a group represented by the formula:

[0436] In one embodiment, R that does not contribute to ring formation 611 ~R 613 , R 621 ~R 624 , and R 631 ~R 634 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or -N(R 6A )(R 6B ) is a group represented by R 611 ~R 613 , R 621 ~R 624 , and R 631 ~R 634 At least one of the groups is a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, and —N(R 6A )(R 6B ) is at least one of the groups represented by the formula (I).

[0437] In one embodiment, R that does not contribute to ring formation 611 ~R 613 , R 621 ~R 624 , and R 631 ~R 634 are each independently, a hydrogen atom, or -N(R 6A )(R 6B ) is a group represented by R 611 ~R 613 , R 621 ~R624 , and R 631 ~R 634 At least one of the -N(R 6A )(R 6B ) is a group represented by the formula:

[0438] In one embodiment, R 6 is a cyclic group that does not contribute to ring formation and is not involved in bonding with L 6 . 651 ~R 658 is a hydrogen atom.

[0439] In one embodiment, the group represented by formula (621) is formula (622):

[0440] [ka]

[0441] (In the formula (622), R 655 ~R 658 One of the R 655 ~R 658 are each independently R in the formula (621). 655 ~R 658 is synonymous with R 651 ~R 654 , and R 65A ~R 65B is R in the formula (621) 651 ~R 654 , and R 65A ~R 65B is synonymous with * 62 is * in the formula (621). 62 is equivalent to

[0442] In one embodiment, the compound represented by formula (62) is a compound represented by formula (62A):

[0443] [ka]

[0444] (In the formula (62A), R 641 ~R 645 , R 661 ~R 665 , and R 671 ~R 675 One or more pairs of adjacent pairs 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 does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring 641 ~R 645 , R 661 ~R 665 , and R 671 ~R 675 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -N(R 6A )(R 6B ) a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 612 , and R 631 ~R 634 are each independently R in the formula (62).612 , and R 631 ~R 634 is synonymous with R 651 ~R 658 , and R 65A ~R 65B are each independently R in the formula (622). 651 ~R 658 , and R 65A ~R 65B is equivalent to

[0445] In one embodiment, the compound represented by formula (62) is a compound represented by formula (62B):

[0446] [ka]

[0447] (In the formula (62B), R 641 ~R 645 , R 681 ~R 685 , and R 691 ~R 695 One or more pairs of adjacent pairs 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 does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring 641 ~R 645 , R 681 ~R 685 , and R 691 ~R 695 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -N(R 6A )(R 6B ) a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 612 , and R 621 ~R 624 are as defined in the formula (62), and R 612 , and R 621 ~R 624 are each independently R in the formula (62). 612 , and R 621 ~R 624 is synonymous with R 651 ~R 658 , and R 65A ~R 65B is as defined in the formula (622), and R 651 ~R 658 , and R 65A ~R 65B are each independently R in the formula (622). 651 ~R 658 , and R 65A ~R 65B is equivalent to

[0448] In one embodiment, the compound represented by formula (62) is a compound represented by formula (62C):

[0449] [ka]

[0450] (In the formula (62C), R 641 ~R 645 , R 661 ~R 665 , R 671 ~R 675 , R 681 ~R 685 , and R 691 ~R 695 One or more pairs of adjacent pairs 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 does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring 641 ~R 645 , R 661 ~R 665 , R 671 ~R 675 , R 681 ~R 685 , and R 691 ~R 695 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -N(R 6A )(R 6B ) a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 612 is R in the formula (62) 612 is synonymous with R 651 ~R 658 , and R 65A ~R 65B is as defined in the formula (622), and R 651 ~R 658 , and R 65A ~R 65B are each independently R in the formula (622). 651 ~R 658 , and R 65A ~R 65B is equivalent to

[0451] In one embodiment, the compound represented by formula (62A) is a compound represented by formula (62A-1) below.

[0452] [ka]

[0453] (In the formula (62A-1), R 612 , R 633 , R 643 , R 661 ~R 665 , R 671 ~R 675 , R 651 ~R 658 , and R 65A ~R 65B are each independently R in the formula (62A). 612 , R 633 , R 643 , R 661 ~R 665 , R 671 ~R 675 , R 651 ~R 658 , and R 65A ~R 65B is equivalent to

[0454] In one embodiment, the compound represented by formula (62B) is a compound represented by formula (62B-1):

[0455] [ka]

[0456] (In the formula (62B-1), R 612 , R 622 , R 643 , R 681 ~R 685 , R 691 ~R 695 , R 651 ~R 658 , and R 65A ~R 65B are each independently R in the formula (62B). 612 , R 622 , R 643 , R 681 ~R 685 , R 691 ~R 695 , R 651 ~R 658 , and R 65A ~R 65B is equivalent to

[0457] In one embodiment, the compound represented by formula (62C) is a compound represented by formula (62C-1):

[0458] [ka]

[0459] (In the formula (62C-1), R 612 , R 643 , R 661 ~R 665 , R 671 ~R 675 , R 681 ~R 685 , R 691 ~R 695 , R 651~R 658 , and R 65A ~R 65B are R in the formula (62C), respectively. 612 , R 643 , R 661 ~R 665 , R 671 ~R 675 , R 681 ~R 685 , R 691 ~R 695 , R 651 ~R 658 , and R 65A ~R 65B is equivalent to

[0460] In one embodiment, R in formulas (62A), (62B), (62C), (62A-1), (62B-1) and (62C-1) 612 , R 622 , R 633 , R 643 , R 661 ~R 665 , R 671 ~R 675 , R 681 ~R 685 , R 691 ~R 695 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0461] In one embodiment, R in formulas (62A), (62B), (62C), and formulas (62A-1), (62B-1), and (62C-1) 612 , R 622 , R 633 , R 643 , R 661 ~R 665 , R 671 ~R 675 , R 681 ~R 685 , R 691 ~R 695are each independently, a hydrogen atom, or It is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.

[0462] The compound represented by the formula (6) is first prepared by connecting the ring a, the ring b and the ring c to a linking group (NR 601 and groups containing NR 602 The intermediate is produced by linking the rings a, b, and c with a linking group (a group containing a boron atom) (reaction 2), and the final product is produced by linking the rings a, b, and c with a linking group (a group containing a boron atom) (reaction 2). In reaction 1, an amination reaction such as the Bachburt-Hartwig reaction can be applied. In reaction 2, a tandem hetero-Friedel-Crafts reaction can be applied.

[0463] (Compounds represented by formulas (64-1) to (64-5)) The compounds represented by formulae (64-1) to (64-5) will be explained.

[0464] In one embodiment, the compound represented by formula (6) is selected from the group consisting of compounds represented by the following formulas (64-1) to (64-5).

[0465] [ka]

[0466] (In the formula (64-1), X is O, S, Se, C(R 403 )(R 404 ), or NR 405 is. R 401 and R 421 Paired with R 421 ~R 423 A set of two or more adjacent 423 and R 402 Paired with R 402 and R 424 Paired with R 424 ~R 427 A set of two or more adjacent 427 and R412 Pairs with and R 412 and R 411 One or more pairs 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 does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring 401 and R 402 are each independently, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. R 403 ~R 405 and R which does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. 411 , R 412 , and R 421 ~R 427 are each independently a hydrogen atom or a substituent R, The substituents R are each independently a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905) a group represented by -N(R 906 )(R 907 ) a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 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 the same or different from each other, R 902 If there are multiple R 902 are the same or different from each other, R 903 If there are multiple R 903 are the same or different from each other, R 904 If there are multiple R 904 are the same or different from each other, R 905 If there are multiple R 905 are the same or different from each other, R 906 If there are multiple R 906 are the same or different from each other, R 907 If there are multiple R 907 are either identical or different.)

[0467] (In the formula (64-2), X is O, S, Se, C(R 403 )(R 404 ), or NR 405 is. R 401 and R 421 Paired with R 421 ~R 423 A set of two or more adjacent 423 and R 402 Paired with R 402 and R 424 Paired with R 424 ~R 427 A set of two or more adjacent 413 and R 414 Pairs with and R 414 and R 401 One or more pairs 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 does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring 401 and R 402 are each independently, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. R 403 ~R 405 and R which does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. 413 , R 414 , and R 421 ~R 427 are each independently a hydrogen atom or a substituent R, and the substituent R has the same meaning as the substituent R in the formula (64-1).

[0468] (In the formula (64-3), X and X' are each independently O, S, Se, C(R 403 )(R 404 ), or NR 405 is. R 401 and R 421 Paired with R 421 ~R 423 A set of two or more adjacent 423 and R 402 Paired with R 415 and R 416 Paired with R 416 and R 412 Pairs with and R 412 and R 411 One or more pairs 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 does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring 401 and R 402 are each independently, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. R 403 ~R 405 and R which does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. 411 , R 412 , R 415 , R 416 , and R 421 ~R 423are each independently a hydrogen atom or a substituent R, and the substituent R has the same meaning as the substituent R in the formula (64-1). R 403 If there are multiple R 403 are identical to or different from each other, R 404 If there are multiple R 404 are identical to or different from each other, R 405 If there are multiple R 405 are either identical or different.)

[0469] (In the formula (64-4), X and X' are each independently O, S, Se, C(R 403 )(R 404 ), or NR 405 is. R 401 and R 421 Paired with R 421 ~R 423 A set of two or more adjacent 423 and R 402 Paired with R 402 and R 418 Paired with R 418 and R 417 Pairs with and R 412 and R 411 One or more pairs 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 does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring 401 and R 402 are each independently, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. R 403 ~R 405 and R which does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. 411 , R 412 , R 417 , R 418 , and R 421 ~R 423 are each independently a hydrogen atom or a substituent R, and the substituent R has the same meaning as the substituent R in the formula (64-1). R 403 If there are multiple R 403 are identical to or different from each other, R 404 If there are multiple R 404 are identical to or different from each other, R 405 If there are multiple R 405 are either identical or different.)

[0470] (In the formula (64-5), X and X' are each independently O, S, Se, C(R 403 )(R 404 ), or NR 405 is. R 401 and R 421 Paired with R 421 ~R 423 A set of two or more adjacent 423 and R 402 Paired with R 402 and R 418 Paired with R 418 and R 417 Paired with R 413 and R 414 Pairs with and R 414 and R 401 One or more pairs 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 does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring 401 and R 402 are each independently, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. R 403 ~R 405 and R which does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring. 413 , R 414 , R 417 , R 418 , and R 421 ~R 423 are each independently a hydrogen atom or a substituent R, and the substituent R has the same meaning as the substituent R in the formula (64-1). R 403 If there are multiple R 403 are identical to or different from each other, R 404 If there are multiple R 404 are identical to or different from each other, R 405 If there are multiple R 405 are either identical or different.)

[0471] In one embodiment, the compound represented by formula (64-2) is a compound represented by formula (64-2A):

[0472] [ka]

[0473] (In the formula (64-2A), R 441 and R 421 Paired with R 421 ~R 423 A set of two or more adjacent 423 and R 442 Paired with R 442 and R 443 Paired with R 443 ~R 446 A set of two or more adjacent 447 ~R 450 A pair consisting of two or more adjacent 450 and R 441 One or more pairs 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 does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring 441 and R 442 are each independently, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. R does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring 421 ~R 423 , and R 443 ~R 450are each independently a hydrogen atom or a substituent R, and the substituent R has the same meaning as the substituent R in the formula (64-1). X is O or S.

[0474] In one embodiment, the substituent in the case of "substituted or unsubstituted" in the formulae (64-1) to (64-5) is an unsubstituted alkyl group having 1 to 50 carbon atoms; an unsubstituted haloalkyl 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; an unsubstituted alkoxy group having 1 to 50 carbon atoms; an unsubstituted alkylthio group having 1 to 50 carbon atoms, an unsubstituted aryloxy group having 6 to 50 ring carbon atoms, an unsubstituted arylthio group having 6 to 50 ring carbon atoms, an unsubstituted aralkyl group having 7 to 50 carbon atoms; -Si(R 41 )(R 42 )(R 43 ) a group represented by -C(=O)R 44 a group represented by -COOR 45 a group represented by -S(=O)2R 46 a group represented by -P(=O)(R 47 )(R 48 ) a group represented by -Ge(R 49 )(R 50 )(R 51 ) a group represented by -N(R 52 )(R 53 ) a group represented by (where R 41 ~R 53R are each independently a hydrogen atom, an unsubstituted alkyl group having 1 to 50 carbon atoms, an unsubstituted aryl group having 6 to 50 ring carbon atoms, or an unsubstituted heterocyclic group having 5 to 50 ring atoms. 41 If there are two or more, there are two or more R 41 are the same or different, and R 42 If there are two or more, there are two or more R 42 are the same or different, and R 43 If there are two or more, there are two or more R 43 are the same or different, and R 44 If there are two or more, there are two or more R 44 are the same or different, and R 45 If there are two or more, there are two or more R 45 are the same or different, and R 46 If there are two or more, there are two or more R 46 are the same or different, and R 47 If there are two or more, there are two or more R 47 are the same or different, and R 48 If there are two or more, there are two or more R 48 are the same or different, and R 49 If there are two or more, there are two or more R 49 are the same or different, and R 50 If there are two or more, there are two or more R 50 are the same or different, and R 51 If there are two or more, there are two or more R 51 are the same or different, and R 52 If there are two or more, there are two or more R 52 are the same or different, and R 53 If there are two or more, there are two or more R 53 are either identical or different.) hydroxy groups, halogen atoms, cyano group, nitro group, an unsubstituted aryl group having 6 to 50 ring carbon atoms, and It is selected from the group consisting of unsubstituted monovalent heterocyclic groups having 5 to 50 ring atoms.

[0475] In one embodiment, the substituent in the case of "substituted or unsubstituted" in the formulae (64-1) to (64-5) is an unsubstituted alkyl group having 1 to 18 carbon atoms; an unsubstituted aryl group having 6 to 18 ring carbon atoms, and It is selected from the group consisting of unsubstituted heterocyclic groups having 5 to 18 ring atoms.

[0476] The compounds represented by the formulae (64-1) to (64-5) can be synthesized by using known alternative reactions and raw materials suited to the target compound.

[0477] In one aspect of the organic EL device according to this embodiment, the second hole blocking layer material is a compound represented by the formula (62A).

[0478] In one aspect of the organic EL device according to this embodiment, all of the groups described as "substituted or unsubstituted" in the second hole-blocking layer material are "unsubstituted" groups.

[0479] (Method for producing second hole blocking layer material) The second hole blocking layer material can be produced by a known method. Alternatively, the second hole blocking layer material can be produced by following a known method and using known alternative reactions and raw materials tailored to the intended purpose.

[0480] (Specific Examples of Second Hole Blocking Layer Materials) Specific examples of the second hole blocking layer material include the following compounds. However, the present invention is not limited to these specific examples of the second hole blocking layer material. In this specification, among the specific examples of the compounds, D represents a deuterium atom, Me represents a methyl group, Ph represents a phenyl group, tBu represents a tert-butyl group, and tAm represents a tert-amyl group.

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[0520] In the organic EL device according to this embodiment, the first hole blocking layer material preferably accounts for 60% by mass or more of the total mass of the hole blocking layer, more preferably 70% by mass or more of the total mass of the hole blocking layer, even more preferably 80% by mass or more of the total mass of the hole blocking layer, even more preferably 90% by mass or more of the total mass of the hole blocking layer, and even more preferably 95% by mass or more of the total mass of the hole blocking layer. The hole blocking layer preferably contains the first hole blocking layer material in an amount of 99% by mass or less of the total mass of the hole blocking layer.

[0521] In the organic EL device according to this embodiment, the second hole-blocking layer material is preferably contained in the hole-blocking layer in an amount of 0.5% by mass or more. That is, the hole-blocking layer preferably contains the second hole-blocking layer material in an amount of 0.5% by mass or more of the total mass of the hole-blocking layer, more preferably 1.0% by mass or more of the total mass of the hole-blocking layer, even more preferably 1.2% by mass or more of the total mass of the hole-blocking layer, and even more preferably 1.5% by mass or more of the total mass of the hole-blocking layer. The hole blocking layer preferably contains the second hole blocking layer material in an amount of 10% by mass or less of the total mass of the hole blocking layer, more preferably 7% by mass or less of the total mass of the hole blocking layer, and even more preferably 5% by mass or less of the total mass of the hole blocking layer.

[0522] However, the upper limit of the total content of the first hole blocking layer material and the second hole blocking layer material in the hole blocking layer is 100% by mass. Note that this embodiment does not exclude the case where the hole blocking layer contains a material other than the first hole blocking layer material and the second hole blocking layer material. The hole blocking layer may contain only one type of first hole blocking layer material or two or more types of second hole blocking layer material.

[0523] In the organic EL device according to this embodiment, the thickness of the hole blocking layer is preferably 1 nm or more, and more preferably 2 nm or more. In the organic EL device according to this embodiment, the thickness of the hole blocking layer is preferably 20 nm or less. In the organic EL device according to this embodiment, the thickness of the hole-blocking layer is preferably 1 nm or more and 20 nm or less. When the thickness of the hole-blocking layer is 1 nm or more and 20 nm or less, triplet excitons generated by recombination of holes and electrons in the emission band can be efficiently confined in the emission band. As a result, the TTF mechanism is promoted in the emission band, and the luminous efficiency is further improved.

[0524] (First light-emitting layer) The first light-emitting layer contains a first host material and a first light-emitting compound. In this specification, the term "host material" refers to a material that accounts for, for example, "50% by mass or more of the layer." Therefore, for example, the first light-emitting layer contains the first host material in an amount of 50% by mass or more of the total mass of the first light-emitting layer.

[0525] (First Host Material) In the organic EL device according to this embodiment, the first host material is not particularly limited. In one aspect of the organic EL device according to this embodiment, the first host material is represented by the following formula (H11), (H12), (H13), (H14), (H15), (H16), or (H17). In the organic EL device according to this embodiment, the first host material is preferably at least one compound selected from the group consisting of a compound represented by the following formula (H11), a compound represented by the following formula (H12), a compound represented by the following formula (H13), and a compound represented by the following formula (H16).

[0526] (Compound represented by formula (H11)) The compound represented by formula (H11) will be explained.

[0527] [ka]

[0528] (In the formula (H11), R 11H ~R 20H , and R 21H ~R 30H are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, However, R 11H ~R 20H One of them is L 11H indicates the bond position with R 21H ~R 30H One of them is L 11H indicates the bonding position with L 11H teeth, single bond, a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms, mz is 0, 1, 2, 3, 4 or 5; L 11H If there are two or more, there are two or more L 11H are either identical or different.)

[0529] In the first host material, R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 931 , R 932 , R 933 , R 934 , R 935 , R 936 , R 937 , R 938 , R 939 , R 940 , R 801 and R 802 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are multiple R 901 are the same or different from each other, R 902 If there are multiple R 902 are the same or different from each other, R 903 If there are multiple R 903 are the same or different from each other, R 904 If there are multiple R 904 are the same or different from each other, R 905 If there are multiple R 905 are the same or different from each other, R906 If there are multiple R 906 are the same or different from each other, R 907 If there are multiple R 907 are the same or different from each other, R 931 If there are multiple R 931 are the same or different from each other, R 932 If there are multiple R 932 are the same or different from each other, R 933 If there are multiple R 933 are the same or different from each other, R 934 If there are multiple R 934 are the same or different from each other, R 935 If there are multiple R 935 are the same or different from each other, R 936 If there are multiple R 936 are the same or different from each other, R 937 If there are multiple R 937 are the same or different from each other, R 938 If there are multiple R 938 are the same or different from each other, R 939 If there are multiple R 939 are the same or different from each other, R 940 If there are multiple R 940 are the same or different from each other, R 801 If there are multiple R 801 are the same or different from each other, R 802 If there are multiple R 802 are the same or different from each other.

[0530] In one aspect of the organic EL device according to this embodiment, the compound represented by formula (H11) is a compound represented by formula (H111) below.

[0531] [ka]

[0532] (In the formula (H111), R 11H , R 12H , R 14H ~R 20H , and R 22H ~R 30H are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L 11H and mz are the L in the formula (H11), respectively. 11H and mz.)

[0533] In one aspect of the organic EL element according to this embodiment, mz is 1 or 2.

[0534] In one aspect of the organic EL element according to this embodiment, L 11H represents a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms.

[0535] In one aspect of the organic EL device according to this embodiment, the first host material is a compound having only two pyrene rings in the molecule. In one aspect of the organic EL device according to this embodiment, the compound represented by formula (H11) is a bispyrene compound.

[0536] (Specific examples of compounds represented by formula (H11)) Specific examples of the compound represented by the formula (H11) include the same compounds as the specific examples of the compound represented by the formula (HB11).

[0537] (Compound represented by formula (H12)) The compound represented by formula (H12) will be explained.

[0538] [ka]

[0539] (In the formula (H12), R 31H ~R 40H , Ar 31H and Ar 32H are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms; a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or is a group represented by the formula (H121), However, R 31H ~R 40H , Ar 31H and Ar 32H at least one of is a group represented by the formula (H121), When a plurality of groups represented by the formula (H121) are present, the plurality of groups represented by the formula (H121) are the same or different from each other, L 12H teeth, single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar 12H teeth, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, my is 0, 1, 2, 3, 4 or 5; L 12H If there are two or more, there are two or more L 12H are identical to or different from each other, Ar 12H If there are two or more, there are two or more Ar 12H are identical to or different from each other, The * in the formula (H121) indicates the bonding position to the benz[a]anthracene ring in the formula (H12).

[0540] In one aspect of the organic EL element according to this embodiment, Ar 31H and Ar 32H At least one of the above is a group represented by the formula (H121).

[0541] In one aspect of the organic EL device according to this embodiment, the compound represented by formula (H12) is a compound represented by formula (H122) or (H123) below.

[0542] [ka]

[0543] (In the formulas (H122) and (H123), R 31H ~R 40H , Ar 31H and Ar 32H are, respectively, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L 12H , Ar 12H and my are the L in the formula (H121), respectively. 12H , Ar 12H and my.)

[0544] In one aspect of the organic EL device according to this embodiment, my is 0, 1, or 2.

[0545] (Specific examples of compounds represented by formula (H12)) Specific examples of the compound represented by the formula (H12) include the same compounds as the specific examples of the compound represented by the formula (HB12).

[0546] (Compound represented by formula (H13)) The compound represented by formula (H13) will be explained.

[0547] [ka]

[0548] (In the formula (H13), R 61H ~R 70H , and R 71H ~R 80H are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) 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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, However, R 61H ~R 70H One of them is L 13H indicates the bond position with R 71H ~R 80H One of them is L 13H indicates the bonding position with L 13H teeth, single bond, a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms, mx is 0, 1, 2, 3, 4 or 5; L 13HIf there are two or more, there are two or more L 13H are either identical or different.)

[0549] In one aspect of the organic EL device according to this embodiment, the compound represented by formula (H13) is a compound represented by formula (H131) below.

[0550] [ka]

[0551] (In the formula (H131), R 61H ~R 68H , R 70H , R 71H ~R 78H , and R 80H are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L 13H and mx are the L in the formula (H13), respectively. 13H and mx.)

[0552] In one aspect of the organic EL element according to this embodiment, mx is 1 or 2.

[0553] In one aspect of the organic EL element according to this embodiment, L 13H represents a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms.

[0554] (Specific examples of compounds represented by formula (H13)) Specific examples of the compound represented by the formula (H13) include the same compounds as the specific examples of the compound represented by the formula (HB13).

[0555] (Compound represented by formula (H14)) The compound represented by formula (H14) will be explained.

[0556] [ka]

[0557] (In the formula (H14), R 81H ~R 92H , and R 93H ~R 104H are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) 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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, However, R 81H ~R 92H One of them is L 14H indicates the bond position with R 93H ~R 104H One of them is L 14H indicates the bonding position with L 14H teeth, single bond, a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms, mw is 0, 1, 2, 3, 4 or 5; L 14H If there are two or more, there are two or more L14H are either identical or different.)

[0558] In one aspect of the organic EL device according to this embodiment, the compound represented by formula (H14) is a compound represented by formula (H141) below.

[0559] [ka]

[0560] (In the formula (H141), R 81H ~R 85H , R 87H ~R 92H , and R 93H ~R 103H are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L 14H and mw are the L in the formula (H14), respectively. 14H and mw.)

[0561] In one aspect of the organic EL element according to this embodiment, mw is 1 or 2.

[0562] In one aspect of the organic EL element according to this embodiment, L 14H represents a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms.

[0563] (Specific examples of compounds represented by formula (H14)) Specific examples of the compound represented by the formula (H14) include the same compounds as the specific examples of the compound represented by the formula (HB14).

[0564] (Compound represented by formula (H15)) The compound represented by formula (H15) will be explained.

[0565] [ka]

[0566] (In the formula (H15), R 105H ~R 116H , and R 117H ~R 128H are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) 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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, However, R 105H ~R 116H One of them is L 15H indicates the bond position with R 117H ~R 128H One of them is L 15H indicates the bonding position with L 15H teeth, single bond, a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms, mv is 0, 1, 2, 3, 4 or 5; L 15H If there are two or more, there are two or more L15H are either identical or different.)

[0567] In one aspect of the organic EL device according to this embodiment, the compound represented by formula (H15) is a compound represented by formula (H151) below.

[0568] [ka]

[0569] (In the formula (H151), R 105H , R 106H , R 108H ~R 116H , R 117H , and R 119H ~R 128H are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L 15H and mv are the L in the formula (H15), respectively. 15H and mv.)

[0570] In one aspect of the organic EL element according to this embodiment, mv is 1 or 2.

[0571] In one aspect of the organic EL element according to this embodiment, L 15H represents a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms.

[0572] (Specific examples of compounds represented by formula (H15)) Specific examples of the compound represented by the formula (H15) include the same compounds as the specific examples of the compound represented by the formula (HB15).

[0573] (Compound represented by formula (H16)) The compound represented by formula (H16) will be explained.

[0574] [ka]

[0575] (In the formula (H13), R 129H ~R 138H are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms; a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or is a group represented by the formula (H160), However, R 129H ~R 138H at least one of is a group represented by the formula (H160), When a plurality of groups represented by the formula (H160) are present, the plurality of groups represented by the formula (H160) are the same or different from each other, L 16H teeth, single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar 16H teeth, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, mu is 0, 1, 2, 3, 4 or 5; L 16H If there are two or more, there are two or more L 16H are identical to or different from each other, Ar 16H If there are two or more, there are two or more Ar 16H are identical to or different from each other, The symbol * in the formula (H160) indicates the bonding position to the pyrene ring in the formula (H16).

[0576] In one aspect of the organic EL device according to this embodiment, R 131H is a group represented by the formula (H160).

[0577] In one aspect of the organic EL element according to this embodiment, L 16H is a single bond or a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, and Ar 16H is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.

[0578] In one aspect of the organic EL element according to this embodiment, L 16H is a single bond or a substituted or unsubstituted arylene group having 6 to 14 ring carbon atoms, and Ar 16H is a substituted or unsubstituted aryl group having 6 to 14 ring carbon atoms.

[0579] In one aspect of the organic EL element according to this embodiment, the group represented by the formula (H160) is a group represented by the following formula (H161).

[0580] [ka]

[0581] (In the formula (H161), X 16 is an oxygen atom or a sulfur atom, L 16H and mu are the L in the formula (H160), respectively. 16H and mu, R 1600H ~R 1604H One or more pairs of adjacent pairs 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 does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring 1600H ~R 1604H are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, Multiple R 1600H are the same or different from each other, When a plurality of groups represented by the formula (H161) are present, the plurality of groups represented by the formula (H161) are the same or different from each other, The symbol * in the formula (H161) indicates the bonding position to the pyrene ring in the formula (H16).

[0582] In one aspect of the organic EL device according to this embodiment, the compound represented by formula (H16) is a compound represented by formula (H162): 131H When is a group represented by the formula (H161), it is represented by the following formula (H162).

[0583] [ka]

[0584] (In the formula (H162), R 129H , R 130H , and R 132H ~R 138H are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, X 16 , L 16H , mu, and R 1600H ~R 1604H are the X in the formula (H161), respectively. 16 , L 16H , mu, and R 1600H ~R 1604H is equivalent to

[0585] In one aspect of the organic EL device according to this embodiment, mu is 0, 1, or 2. In one aspect of the organic EL device according to this embodiment, when mu is 0, the compound represented by formula (H162) is represented by formula (H163) below.

[0586] [ka]

[0587] (In the formula (H163), R 129H , R 130H , R 132H ~R 138H , R 1600H ~R 1604H , and X 16 are R in the formula (H162), respectively. 129H , R 130H , R 132H ~R 138H , R 1600H ~R 1604H , and X 16 is equivalent to

[0588] In one aspect of the organic EL device according to this embodiment, the first host material is a compound having only one pyrene ring in the molecule. In one aspect of the organic EL device according to this embodiment, the compound represented by formula (H16) is a monopyrene compound.

[0589] (Specific examples of compounds represented by formula (H16)) Specific examples of the compound represented by the formula (H16) include the same compounds as the specific examples of the compound represented by the formula (HB16).

[0590] (Compound represented by formula (H17)) The compound represented by formula (H17) will be explained.

[0591] [ka]

[0592] (In the formula (H17), R 51H ~R 58H are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -N(R 906 )(R 907 ) a group represented by -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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L 141H and L 142H are each independently, single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar 141H and Ar 142H are each independently, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0593] In the organic EL element according to this embodiment, R 51H ~R 58H are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by -S-(R 905 ) a group represented by -N(R 906 )(R 907 ) a group represented by -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 -B(OR 938 )(OR 939 ) a group represented by -OS(=O)2(R 940 ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms; -C(=O)R 801 a group represented by -COOR 802 a group represented by halogen atoms, a cyano group, or is a nitro group, L 141H and L 142H are each independently, single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar 141H and Ar 142H are each independently, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is preferably a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

[0594] In the organic EL element according to this embodiment, L 141H and L 142H are each independently a single bond or a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, and Ar 141H and Ar 142H are preferably each independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.

[0595] In the organic EL element according to this embodiment, Ar 141H and Ar 142Hare preferably each independently a phenyl group, a naphthyl group, a phenanthryl group, a biphenyl group, a terphenyl group, a diphenylfluorenyl group, a dimethylfluorenyl group, a benzodiphenylfluorenyl group, a benzodimethylfluorenyl group, a dibenzofuranyl group, a dibenzothienyl group, a naphthobenzofuranyl group, or a naphthobenzothienyl group.

[0596] In the organic EL device according to this embodiment, the compound represented by formula (H17) is preferably a compound represented by the following formula (H171), (H172), (H173), (H174), (H175), (H176), (H177), (H178), or (H179).

[0597] [ka]

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[0601] [ka]

[0602] (In the formulas (H171) to (H179), L 141H , Ar 141H , and R 51H ~R 58H are the L in the formula (H17), respectively. 141H , Ar 141H , and R 51H ~R58H is equivalent to

[0603] The compound represented by formula (H17) is also preferably a compound represented by the following formula (H1701), (H1702), (H1703), (H1704), (H1705), (H1706), (H1707), (H1708) or (H1709).

[0604] [ka]

[0605] [ka]

[0606] [ka]

[0607] [ka]

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[0609] (In the formulae (H1701), (H1702), (H1703), (H1704), (H1705), (H1706), (H1707), (H1708) and (H1709), R 51H and R 53H ~R 58H are R in the formula (H17), respectively. 51H and R 53H ~R 58H is synonymous with L 141H and Ar 141H are the L in the formula (H17), respectively. 141H and Ar 141H is synonymous with L 143H teeth, single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, L 141H and L 143H are identical to or different from each other, Ar 143H teeth, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, Ar 141H and Ar 143H are either identical or different from each other.)

[0610] The compound represented by formula (H17) is also preferably a compound represented by the following formula (H1711), (H1712), (H1713), (H1714), (H1715), (H1716), (H1717), (H1718) or (H1719).

[0611] [ka]

[0612] [ka]

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[0615] [ka]

[0616] (In the formulae (H1711), (H1712), (H1713), (H1714), (H1715), (H1716), (H1717), (H1718) and (H1719), R 51H , R 52H and R 54H ~R 58H are R in the formula (H17), respectively. 51H , R 52H and R 54H ~R 58H is synonymous with L 141H and Ar 141H are the L in the formula (H17), respectively. 141H and Ar 141H is synonymous with L 143H teeth, single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, L 141H and L 143H are identical to or different from each other, Ar 143H teeth, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, Ar 141H and Ar 143H are either identical or different from each other.)

[0617] In the compound represented by formula (H17), R 51H ~R 58H each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, or —Si(R 901 )(R 902 )(R 903 ) is preferably a group represented by the formula (I).

[0618] L 141H is a single bond or an unsubstituted arylene group having 6 to 22 ring carbon atoms, and Ar 141H is preferably a substituted or unsubstituted aryl group having 6 to 22 ring carbon atoms.

[0619] In the organic EL element according to this embodiment, when the first emitting layer and the second emitting layer are stacked in the order of the first emitting layer and the second emitting layer from the anode side, it is preferable that the electron mobility μe(H1) of the first host material and the electron mobility μe(H2) of the second host material satisfy the relationship of the following mathematical formula (Mathematical Formula 30). μe(H2)>μe(H1) …(Number 70) When the first host material and the second host material satisfy the relationship of the above mathematical formula (70), the recombination ability of holes and electrons in the first light-emitting layer is improved.

[0620] In the organic EL device according to this embodiment, in the compound represented by formula (H17), R 51H ~R 58H is preferably a hydrogen atom in order to prevent the suppression of intermolecular interactions and the decrease in electron mobility. 51H ~R 58H may be 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.

[0621] R 51H ~R 58H When the second compound is a bulky substituent such as an alkyl group or a cycloalkyl group, the intermolecular interaction is suppressed, the electron mobility with respect to the first host material is reduced, and the relationship μe(H2)>μe(H1) in the above formula (70) may not be satisfied. When the second compound is used in the second emitting layer, satisfying the relationship μe(H2)>μe(H1) is expected to suppress a decrease in the recombination ability of holes and electrons in the first emitting layer and a decrease in luminous efficiency. The substituent may be a haloalkyl group, an alkenyl group, an alkynyl group, -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 aralkyl group, -C(=O)R 801 a group represented by -COOR 802 The group represented by the formula (I), the halogen atom, the cyano group, and the nitro group may be bulky, and the alkyl group and the cycloalkyl group may be even more bulky. In the second compound represented by the formula (H17), R 51H ~R 58H is preferably not a bulky substituent, is preferably not an alkyl group or a cycloalkyl group, and is preferably not an alkyl group, a cycloalkyl group, a haloalkyl group, an alkenyl group, an alkynyl group, -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 aralkyl group, -C(=O)R 801 a group represented by -COOR 802 It is more preferable that the aryl group is not a group represented by the formula (I), a halogen atom, a cyano group, or a nitro group.

[0622] In the organic EL device according to this embodiment, in the compound represented by formula (H17), R 51H ~R 58H , each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, or —Si(R 901 )(R 902 )(R 903 ) is also preferred.

[0623] In the organic EL device according to this embodiment, in the compound represented by formula (H17), R 51H ~R58H , preferably a hydrogen atom.

[0624] In the compound represented by formula (H17), R 51H ~R 58H It is also preferable that the substituent in the case of "substituted or unsubstituted" does not include the above-mentioned substituents that may be bulky, particularly substituted or unsubstituted alkyl groups and substituted or unsubstituted cycloalkyl groups. 51H ~R 58H In the case of "substituted or unsubstituted" in the above, the substituent does not include a substituted or unsubstituted alkyl group or a substituted or unsubstituted cycloalkyl group, so that suppression of intermolecular interactions due to the presence of bulky substituents such as alkyl groups and cycloalkyl groups can be prevented, and a decrease in electron mobility can be prevented. Furthermore, when such a second compound is used in the second light-emitting layer, a decrease in the recombination ability of holes and electrons in the first light-emitting layer and a decrease in luminous efficiency can be suppressed.

[0625] R, a substituent of the anthracene skeleton 51H ~R 58H R is not a bulky substituent, but rather a substituent 51H ~R 58H It is more preferable that R is unsubstituted. 51H ~R 58H is not a bulky substituent, R as a non-bulky substituent 51H ~R 58H When a substituent is bonded to R, the substituent is preferably not a bulky substituent. 51H ~R 58H The substituent bonded to is preferably not an alkyl group or a cycloalkyl group, and is preferably an alkyl group, a cycloalkyl group, a haloalkyl group, an alkenyl group, an alkynyl group, or —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 )(R907 ), an aralkyl group, -C(=O)R 801 a group represented by -COOR 802 It is more preferable that the aryl group is not a group represented by the formula (I), a halogen atom, a cyano group, or a nitro group.

[0626] In the compound represented by the formula (H17), it is preferable that all groups described as "substituted or unsubstituted" are "unsubstituted" groups.

[0627] (Specific examples of compounds represented by formula (H17)) Specific examples of the compound represented by formula (H17) include the following compounds. However, the compound represented by formula (H17) in the present invention is not limited to these specific examples. In the following specific examples, D represents a deuterium atom.

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[0658] In the organic EL device according to this embodiment, the first host material is preferably represented by the formula (H12).

[0659] In one aspect of the organic EL device according to this embodiment, the first host material has one or more deuterium atoms. In one aspect of the organic EL device according to this embodiment, all of the hydrogen atoms in the first host material are deuterium atoms.

[0660] In one aspect of the organic EL device according to this embodiment, all of the groups described as "substituted or unsubstituted" in the first host material are "unsubstituted" groups.

[0661] (Method for producing first host material) The first host material can be produced by a known method. Alternatively, the first host material can be produced by following a known method and using known alternative reactions and raw materials suited to the target material.

[0662] In the organic EL device according to this embodiment, the first light-emitting layer preferably contains the first host material in an amount of 60 mass % or more of the total mass of the first light-emitting layer, more preferably 70 mass % or more of the total mass of the first light-emitting layer, even more preferably 80 mass % or more of the total mass of the first light-emitting layer, still more preferably 90 mass % or more of the total mass of the first light-emitting layer, and even more preferably 95 mass % or more of the total mass of the first light-emitting layer. The first emitting layer preferably contains the first host material in an amount of 99% by mass or less of the total mass of the first emitting layer.

[0663] (First luminescent compound) In one aspect of the organic EL device according to this embodiment, the first light-emitting compound is a compound that emits light with a maximum peak wavelength of 500 nm or less.

[0664] In this specification, the maximum peak wavelength of fluorescent light may be measured by the following method. A first luminescent compound (the compound to be measured) and a first host material are co-deposited on a quartz substrate (25 × 25 mm) so that the ratio (by mass) of the first luminescent compound to the first host material contained in the first luminescent layer (first luminescent compound / first host material) is the same, forming a film measurement sample with a thickness of 50 nm. A sealing glass (outer dimensions 17 × 17 mm, inner dimensions 13 × 13 mm, recessed depth 0.5 mm) coated with a coating-type desiccant (OleDry-P2, manufactured by Futaba Electronics Co., Ltd.) is then sealed with a UV-curable resin (TB3124N(IE) manufactured by ThreeBond Fine Chemical Co., Ltd.). For the PL spectrum measurement, a fluorescence spectrum measurement device (fluorescence spectrophotometer F-7000 (manufactured by Hitachi High-Tech Science Corporation)) is used. The measurement conditions are as follows. The film measurement sample is excited at a specific wavelength (a wavelength 30 nm shorter than the maximum peak wavelength of the absorption spectrum) and the maximum peak wavelength λ (unit: nm) of the film is calculated from the obtained PL spectrum.

[0665] In the organic EL device according to this embodiment, the first light-emitting compound more preferably emits light having a maximum peak wavelength of 480 nm or less. In the organic EL device according to this embodiment, the first light-emitting compound preferably emits light with a maximum peak wavelength of 430 nm or more.

[0666] In the organic EL device according to this embodiment, the first light-emitting compound is preferably a fluorescent compound. In the organic EL device according to this embodiment, the first light-emitting compound preferably exhibits fluorescent emission with a maximum peak wavelength of 500 nm or less, and more preferably exhibits fluorescent emission with a maximum peak wavelength of 480 nm or less. In the organic EL device according to this embodiment, the first light-emitting compound preferably exhibits fluorescent emission with a maximum peak wavelength of 430 nm or more. The method for measuring the maximum peak wavelength of the compound is as described above.

[0667] In the organic EL device according to this embodiment, the half width of the maximum peak of the first light-emitting compound is preferably 1 nm or more and 20 nm or less.

[0668] In the emission spectrum of the first light-emitting compound, the peak at which the emission intensity is greatest is defined as the maximum peak, and when the height of the maximum peak is defined as 1, the heights of other peaks appearing in the emission spectrum are preferably less than 0.6. Note that the peaks in the emission spectrum are defined as local maxima. In addition, it is preferable that the number of peaks in the emission spectrum of the first luminescent compound is less than three.

[0669] In one aspect of the organic EL device according to this embodiment, the first light-emitting compound is represented by the formula (6).

[0670] In the organic EL device according to this embodiment, the first light-emitting compound is preferably a compound that does not contain an azine ring structure in the molecule.

[0671] In the organic EL device according to this embodiment, the first light-emitting compound is preferably not a boron-containing complex, and more preferably not a complex.

[0672] In the organic EL device according to this embodiment, the first light-emitting layer preferably does not contain a metal complex. Also, in the organic EL device according to this embodiment, the first light-emitting layer preferably does not contain a boron-containing complex.

[0673] In the organic EL device according to this embodiment, the first light-emitting layer preferably does not contain a phosphorescent material (dopant material). The first light-emitting layer preferably does not contain a heavy metal complex or a phosphorescent rare earth metal complex, such as an iridium complex, an osmium complex, or a platinum complex.

[0674] In the organic EL device according to this embodiment, it is preferable that the triplet energy T1(H1) of the first host material and the triplet energy T1(D1) of the first light-emitting compound satisfy the relationship of the following mathematical formula (Mathematical Formula 4). T1(D1)>T1(H1) ... (Number 4)

[0675] When the first host material and the first light-emitting compound satisfy the relationship of mathematical formula (Mathematical Formula 4), triplet excitons generated in the first light-emitting layer move over the first host material rather than the first light-emitting compound, which has a higher triplet energy, and are therefore more likely to move to the second light-emitting layer.

[0676] In the organic EL device according to this embodiment, it is preferable that the singlet energy S1(H1) of the first host material and the singlet energy S1(D1) of the first light-emitting compound satisfy the relationship shown in the following formula (5). S1(H1)>S1(D1) ... (Number 5) The singlet energy S1 means the energy difference between the lowest excited singlet state and the ground state.

[0677] When the first host material and the first light-emitting compound satisfy the relationship of the mathematical formula (Mathematical Formula 5), ​​singlet excitons generated on the first host material can easily transfer energy from the first host material to the first light-emitting compound, contributing to the fluorescent emission of the first light-emitting compound.

[0678] (singlet energy S1) The following method can be mentioned as a method for measuring the 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 1000 mol / L or less is prepared and placed in a quartz cell, and the absorption spectrum (vertical axis: absorption intensity, horizontal axis: wavelength) of this sample is measured at room temperature (300 K). A tangent line is drawn to the falling edge on the long wavelength side of this absorption spectrum, and the wavelength value λedge [nm] at the intersection of this tangent line and the horizontal axis is substituted into the following conversion formula (F2) to calculate the singlet energy. Conversion formula (F2): S1[eV]=1239.85 / λedge An example of an absorption spectrum measuring device is a spectrophotometer (device name: U3310) manufactured by Hitachi High-Tech Science Corporation, but is not limited to this.

[0679] 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.

[0680] The organic EL element according to this embodiment preferably satisfies the relationship of the following mathematical formula (Mathematical Formula 3B). T1(D1)>T1(H1)>T1(H2)…(Number 3B)

[0681] In the organic EL device according to this embodiment, the first light-emitting compound is preferably contained in the first light-emitting layer in an amount of 0.5% by mass or more. That is, the first light-emitting layer preferably contains the first light-emitting compound in an amount of 0.5% by mass or more of the total mass of the first light-emitting layer, more preferably 1.0% by mass or more of the total mass of the first light-emitting layer, even more preferably 1.2% by mass or more of the total mass of the first light-emitting layer, and even more preferably 1.5% by mass or more of the total mass of the first light-emitting layer. The first light-emitting layer preferably contains the first light-emitting compound in an amount of 10 mass % or less of the total mass of the first light-emitting layer, more preferably 7 mass % or less of the total mass of the first light-emitting layer, and even more preferably 5 mass % or less of the total mass of the first light-emitting layer.

[0682] However, the upper limit of the total content of the first host material and the first light-emitting compound in the first light-emitting layer is 100% by mass.

[0683] In this embodiment, the first light-emitting layer may contain a material other than the first host material and the first light-emitting compound. The first light-emitting layer may contain only one type of first host material or two or more types of first light-emitting compounds.

[0684] In the organic EL device according to this embodiment, the thickness of the first light-emitting layer is preferably 3 nm or more, more preferably 4 nm or more, and even more preferably 5 nm or more. A thickness of 3 nm or more of the first light-emitting layer is sufficient to cause recombination of holes and electrons in the first light-emitting layer. In the organic EL device according to this embodiment, the thickness of the first emitting layer is preferably 15 nm or less, more preferably 10 nm or less, which is thin enough to allow triplet excitons to migrate to the second emitting layer. In the organic EL device according to this embodiment, the thickness of the first light-emitting layer is more preferably 3 nm or more and 15 nm or less.

[0685] (Second light-emitting layer) In the organic EL device according to this embodiment, the second light-emitting layer contains a second host material and a second light-emitting compound.

[0686] (Second Host Material) In one aspect of the organic EL device according to the present embodiment, the second host material is the above-mentioned emission band material, that is, in one aspect of the organic EL device according to the present embodiment, the triplet energy T1(M1) of the first hole-blocking layer material and the triplet energy T1(H2) of the second host material as the emission band material satisfy the relationship shown in the following formula (3). T1(M1)>T1(H2) ... (Equation 3)

[0687] In the organic EL device according to this embodiment, the second host material may be the same as the first host material described above. That is, the second host material in one aspect of the organic EL device according to this embodiment is a compound represented by formula (H11), (H12), (H13), (H14), (H15), (H16), or (H17).

[0688] In one aspect of the organic EL device of this embodiment, the second host material is a compound different from the first host material contained in the first emitting layer.

[0689] In the organic EL device according to this embodiment, the second host material is preferably represented by the formula (H17).

[0690] In one aspect of the organic EL device according to this embodiment, all of the groups described as "substituted or unsubstituted" in the second host material are "unsubstituted" groups.

[0691] In the organic EL device according to this embodiment, the second emitting layer preferably contains the second host material in an amount of 60 mass % or more of the total mass of the second emitting layer, more preferably 70 mass % or more of the total mass of the second emitting layer, even more preferably 80 mass % or more of the total mass of the second emitting layer, still more preferably 90 mass % or more of the total mass of the second emitting layer, and even more preferably 95 mass % or more of the total mass of the second emitting layer. The second emitting layer preferably contains the second host material in an amount of 99% by mass or less of the total mass of the second emitting layer.

[0692] (Second luminescent compound) In one aspect of the organic EL device according to this embodiment, the second light-emitting compound is a compound that emits light with a maximum peak wavelength of 500 nm or less.

[0693] In the organic EL device according to this embodiment, the second light-emitting compound more preferably emits light having a maximum peak wavelength of 480 nm or less. In the organic EL device according to this embodiment, the second light-emitting compound preferably emits light with a maximum peak wavelength of 430 nm or more.

[0694] In the organic EL device according to this embodiment, the second light-emitting compound is preferably a fluorescent compound. In the organic EL device according to this embodiment, the second light-emitting compound preferably exhibits fluorescent emission with a maximum peak wavelength of 500 nm or less, and more preferably exhibits fluorescent emission with a maximum peak wavelength of 480 nm or less. In the organic EL device according to this embodiment, the second light-emitting compound preferably exhibits fluorescent emission with a maximum peak wavelength of 430 nm or more. The method for measuring the maximum peak wavelength of the compound is as described above.

[0695] In the organic EL device according to this embodiment, the half width of the maximum peak of the second light-emitting compound is preferably 1 nm or more and 20 nm or less.

[0696] In one aspect of the organic EL device according to this embodiment, the second light-emitting compound is represented by the formula (6).

[0697] In the organic EL device according to this embodiment, the second light-emitting compound is preferably a compound that does not contain an azine ring structure in the molecule.

[0698] In the organic EL device according to this embodiment, the second light-emitting compound is preferably not a boron-containing complex, and more preferably not a complex.

[0699] In the organic EL device according to this embodiment, the second light-emitting layer preferably does not contain a metal complex. Also, in the organic EL device according to this embodiment, the second light-emitting layer preferably does not contain a boron-containing complex.

[0700] In the organic EL device according to this embodiment, the second light-emitting layer preferably does not contain a phosphorescent material (dopant material). The second light-emitting layer preferably does not contain a heavy metal complex or a phosphorescent rare earth metal complex, such as an iridium complex, an osmium complex, or a platinum complex.

[0701] In the organic EL device according to this embodiment, it is preferable that the triplet energy T1(D2) of the second light-emitting compound and the triplet energy T1(H2) of the second host material satisfy the relationship of the following mathematical formula (Mathematical Formula 6). T1(D2)>T1(H2) ... (Number 6)

[0702] In the organic EL device according to this embodiment, the second light-emitting compound and the second host material satisfy the relationship of the above mathematical formula (Mathematical Formula 6), so that triplet excitons generated in the first light-emitting layer transfer energy to molecules of the second host material, rather than to the second light-emitting compound having a higher triplet energy, when they move to the second light-emitting layer. Furthermore, triplet excitons generated by recombination of holes and electrons on the second host material do not transfer to the second light-emitting compound having a higher triplet energy. Triplet excitons generated by recombination on molecules of the second light-emitting compound quickly transfer energy to molecules of the second host material. Triplet excitons in the second host material do not transfer to the second light-emitting compound, but instead efficiently collide with each other on the second host material due to the TTF phenomenon, generating singlet excitons.

[0703] In the organic EL device according to this embodiment, it is preferable that the singlet energy S1(H2) of the second host material and the singlet energy S1(D2) of the second light-emitting compound satisfy the relationship of the following mathematical formula (Mathematical Formula 7). S1(H2)>S1(D2)…(Number 7)

[0704] In the organic EL device according to this embodiment, the second light-emitting compound and the second host material satisfy the relationship of the above mathematical formula (Mathematical Formula 7), and therefore the singlet energy of the second light-emitting compound is smaller than the singlet energy of the second host material. Therefore, the singlet excitons generated by the TTF phenomenon transfer energy from the second host material to the second light-emitting compound, contributing to the fluorescent emission of the second light-emitting compound.

[0705] In the organic EL device according to this embodiment, the second light-emitting compound is preferably contained in the second light-emitting layer in an amount of 0.5% by mass or more. That is, the second light-emitting layer preferably contains the second light-emitting compound in an amount of 0.5% by mass or more of the total mass of the second light-emitting layer, more preferably 1.0% by mass or more of the total mass of the second light-emitting layer, even more preferably 1.2% by mass or more of the total mass of the second light-emitting layer, and even more preferably 1.5% by mass or more of the total mass of the second light-emitting layer. The second light-emitting layer preferably contains the second light-emitting compound in an amount of 10 mass % or less of the total mass of the second light-emitting layer, more preferably 7 mass % or less of the total mass of the second light-emitting layer, and even more preferably 5 mass % or less of the total mass of the second light-emitting layer.

[0706] However, the upper limit of the total content of the second host material and the second light-emitting compound is 100% by mass. Note that this embodiment does not exclude the case where the second light-emitting layer contains a material other than the second host material and the second light-emitting compound. The second light-emitting layer may contain only one type of second host material or two or more types of second light-emitting compounds.

[0707] In one aspect of the organic EL device according to this embodiment, the second emitting layer contains two or more types of second host materials.

[0708] In the organic EL device according to this embodiment, the thickness of the second emitting layer is preferably 5 nm or more, more preferably 9 nm or more, and even more preferably 11 nm or more. When the thickness of the second emitting layer is 5 nm or more, triplet excitons that have migrated from the first emitting layer to the second emitting layer can be easily prevented from returning to the first emitting layer. Furthermore, when the thickness of the second emitting layer is 5 nm or more, triplet excitons can be sufficiently separated from the recombination moiety in the first emitting layer. In the organic EL device according to this embodiment, the thickness of the second light-emitting layer is preferably 20 nm or less, which can increase the density of triplet excitons in the second light-emitting layer and make the TTF phenomenon more likely to occur. In the organic EL device according to this embodiment, the second light-emitting layer preferably has a thickness of 5 nm or more and 20 nm or less.

[0709] In the organic EL device according to this embodiment, when the second light-emitting layer is the layer closest to the cathode among the multiple layers in the light-emitting band, the total thickness of the second light-emitting layer and the hole-blocking layer is preferably 25 nm or less, more preferably 20 nm or less, and even more preferably 16 nm or less.

[0710] In the organic EL device according to this embodiment, the thickness of the second light-emitting layer is preferably greater than the thickness of the first light-emitting layer, and the thickness of the second light-emitting layer is preferably greater than the thickness of the hole-blocking layer.

[0711] In the organic EL device according to this embodiment, it is preferable that the triplet energy T1(DX) of the compound contained in the first emitting layer and exhibiting fluorescent emission with a maximum peak wavelength of 500 nm or less or the triplet energy T1(DX) of the compound contained in the second emitting layer and exhibiting fluorescent emission with a maximum peak wavelength of 500 nm or less, the triplet energy T1(H1) of the first host material, and the triplet energy T1(H2) of the second host material satisfy the relationship shown in the following mathematical formula (Mathematical Formula 10). 2.6eV>T1(DX)>T1(H1)>T1(H2)…(Number 10)

[0712] When the first emitting layer contains a first emitting compound, the triplet energy T1(D1) of the first emitting compound preferably satisfies the relationship of the following mathematical formula (Mathematical Formula 10A). 2.6eV>T1(D1)>T1(H1)>T1(H2) ... (several tens of amperes)

[0713] When the second light-emitting layer contains a second light-emitting compound, the triplet energy T1(D2) of the second light-emitting compound preferably satisfies the relationship of the following formula (Formula 10B). 2.6 eV > T1(D2) > T1(H1) > T1(H2) …(Formula 10B)

[0714] In the organic EL device according to the present embodiment, the triplet energy T1(DX) of a compound that exhibits fluorescence emission with a maximum peak wavelength of 500 nm or less contained in the first light-emitting layer or a compound that exhibits fluorescence emission with a maximum peak wavelength of 500 nm or less contained in the second light-emitting layer, and the triplet energy T1(H1) of the first host material preferably satisfy the relationship of the following formula (Formula 11). 0 eV < T1(DX) - T1(H1) < 0.6 eV …(Formula 11)

[0715] When the first light-emitting layer contains a first light-emitting compound, the triplet energy T1(D1) of the first light-emitting compound preferably satisfies the relationship of the following formula (Formula 11A). 0 eV < T1(D1) - T1(H1) < 0.6 eV …(Formula 11A)

[0716] In one aspect of the organic EL device according to the present embodiment, the first light-emitting compound and the second light-emitting compound are the same as or different from each other.

[0717] In the organic EL device according to the present embodiment, it is preferable that the first light-emitting layer and the second light-emitting layer are in direct contact with each other.

[0718] In this specification, the layer structure in which "the first light-emitting layer and the second light-emitting layer are in direct contact with each other" may include any of the following aspects (LS1), (LS2), and (LS3). (LS1) A region in which both the first host material and the second host material are mixed occurs in the process of passing through the step of depositing the compound related to the first light-emitting layer and the step of depositing the compound related to the second light-emitting layer, and the region exists at the interface between the first light-emitting layer and the second light-emitting layer. (LS2) When the first emitting layer and the second emitting layer contain a light-emitting compound, a region in which the first host material, the second host material, and the light-emitting compound are mixed is generated during the process of vapor-depositing the compound for the first emitting layer and the process of vapor-depositing the compound for the second emitting layer, and this region is present at the interface between the first emitting layer and the second emitting layer. (LS3) When the first emitting layer and the second emitting layer contain a light-emitting compound, a region made of the light-emitting compound, a region made of the first host material, or a region made of the second host material is generated during the process of vapor-depositing the compound for the first emitting layer and the compound for the second emitting layer, and the region is present at the interface between the first emitting layer and the second emitting layer.

[0719] (Other configurations of organic EL element) (substrate) The substrate is used as a support for the organic EL element. Examples of materials that can be used for the substrate include glass, quartz, and plastic. A flexible substrate may also be used. A flexible substrate is a substrate that can be bent (flexible), and examples thereof include a plastic substrate. Examples of materials for forming the plastic substrate include polycarbonate, polyarylate, polyethersulfone, polypropylene, polyester, polyvinyl fluoride, polyvinyl chloride, polyimide, and polyethylene naphthalate. Inorganic vapor-deposited films may also be used.

[0720] (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), and titanium (Ti), as well as nitrides of metal materials (e.g., titanium nitride).

[0721] 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.

[0722] Of the organic layers formed on the anode, the hole injection layer formed in contact with the anode is formed using a composite material that facilitates hole injection regardless of the work function of the anode, and therefore materials that can be used as electrode materials (for example, metals, alloys, electrically conductive compounds, and mixtures thereof, as well as elements belonging to Group 1 or Group 2 of the periodic table) can be used.

[0723] Materials with low work functions, such as elements belonging to Group 1 or 2 of the periodic table, can also be used: alkali metals such as lithium (Li) and cesium (Cs); alkaline earth metals such as magnesium (Mg), calcium (Ca), and strontium (Sr); alloys containing these metals (e.g., MgAg, AlLi); and rare earth metals such as europium (Eu) and ytterbium (Yb); and alloys containing these metals. When forming an anode using alkali metals, alkaline earth metals, and alloys containing these metals, vacuum deposition or sputtering can be used. Furthermore, when using silver paste, coating or inkjet printing can be used.

[0724] When the organic EL element is a bottom-emission type, the anode is a light-transmitting electrode having light-transmitting properties. The light-transmitting electrode is preferably formed of a light-transmitting or semi-transmitting metal material that transmits light emitted 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. The light-transmitting or semi-transmitting metal material may be a material listed as a material used for the conductive layer (or transparent conductive layer) described below.

[0725] When the organic EL device is a top-emission type, the anode is a light-reflective electrode having a light-reflective layer. The light-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. Examples of metal materials used for the light-reflecting layer include a simple metal material selected from the group consisting of Al, Ag, Ta, Zn, Mo, W, Ni, and Cr, or an alloy material containing a metal selected from this group as the main component (preferably 50% by mass or more of the total); an amorphous alloy selected from the group consisting of NiP, NiB, CrP, and CrB; and a microcrystalline alloy selected from the group consisting of NiAl and silver alloys. In addition, the metal material used for the light-reflecting layer may be at least one alloy selected from the group consisting of APC (an alloy of silver, palladium, and copper), ARA (an alloy of silver, rubidium, and gold), MoCr (an alloy of molybdenum and chromium), and NiCr (an alloy of nickel and chromium). The light-reflecting layer may be a single layer or multiple layers.

[0726] The anode as a light-reflective electrode may be composed of only a light-reflecting layer, or may have a multilayer structure including a light-reflecting layer and a conductive layer (preferably a transparent conductive layer). When the anode has a light-reflecting layer and a conductive layer, the conductive layer is preferably disposed between the reflective layer and a layer including a hole-transporting region (e.g., a hole-injection layer or a hole-transporting layer). The anode may also have a multilayer structure in which a light-reflecting layer is disposed between two conductive layers (a first conductive layer and a second conductive layer). In such a multilayer structure, the first conductive layer and the second conductive layer may be formed of the same material or different materials. The material used for the conductive layer can be appropriately selected from the materials listed in the anode section. In addition, the conductive layer (transparent conductive layer) serving as a transparent electrode can also be made of a metal, alloy, electrically conductive compound, or mixture thereof having a large work function (specifically, 4.0 eV or more). Furthermore, the conductive layer may be made of, for example, alkali metals such as lithium (Li) and cesium (Cs), alkaline earth metals such as magnesium (Mg), calcium (Ca), and strontium (Sr), alloys containing at least one selected from the group consisting of alkali metals and alkaline earth metals (e.g., MgAg and AlLi), rare earth metals such as europium (Eu) and ytterbium (Yb), and alloys containing at least one selected from rare earth metals.

[0727] (cathode) For the cathode, it is preferable to use a metal, alloy, electrically conductive compound, or mixture thereof 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), and alloys containing these (e.g., MgAg, AlLi), and rare earth metals such as europium (Eu) and ytterbium (Yb), and alloys containing these.

[0728] 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.

[0729] 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, and indium oxide-tin oxide containing silicon or silicon oxide. These conductive materials can be deposited by sputtering, inkjet printing, spin coating, or the like.

[0730] When the organic EL element is a bottom-emission type, the cathode is a light-reflective electrode. The light-reflective electrode is preferably formed of a metal material having light reflectivity. The light-reflective metal material can be appropriately selected from the materials listed in the cathode section. In addition, the light-reflective metal material may be the material listed as the metal material used for the light-reflecting layer.

[0731] When the organic EL element is a top-emission type, the cathode is a light-transmitting electrode having light-transmitting properties. The light-transmitting electrode is preferably formed of a light-transmitting or semi-transmitting metal material that transmits light emitted from the light-emitting layer. 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 section on the cathode. The light-transmitting or semi-transmitting metal material may be the material listed above as the material used for the conductive layer (or transparent conductive layer).

[0732] (capping layer) A top-emission organic EL device may have a capping layer on top of the cathode, which may be disposed on the surface of the cathode opposite to the surface facing the anode. 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, for example, aromatic amine derivatives, anthracene derivatives, pyrene derivatives, fluorene derivatives, and dibenzofuran derivatives. Furthermore, a laminate in which two or more layers containing compounds that can be used in the capping layer are laminated can also be used as the capping layer.

[0733] (hole injection layer) The hole injection layer is a layer containing a substance with high hole injection properties, such as molybdenum oxide, titanium oxide, vanadium oxide, rhenium oxide, ruthenium oxide, chromium oxide, zirconium oxide, hafnium oxide, tantalum oxide, silver oxide, tungsten oxide, and manganese oxide.

[0734] 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 1,3,5-tris[N-(4-diphenylaminophenyl)-N-phenylamino]biphenyl (abbreviation: DNTPD). [N-(1-naphthyl)-N-(9-phenylcarbazol-3-yl)amino]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), as well as aromatic amine compounds such as dipyrazino[2,3-f:20,30-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (HAT-CN).

[0735] 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.

[0736] (Hole transport layer) The hole transport layer is a layer containing a substance with high hole transport properties. In the organic EL device according to this embodiment, a hole transport layer is preferably disposed between the anode and the light-emitting zone, and more preferably between the anode and the first light-emitting layer.

[0737] In the organic EL device according to this embodiment, the hole transport layer preferably contains a third compound represented by the following formula (H1) or (H2).

[0738] [ka]

[0739] (In the formula (H1), L 31 , L 32 and L 33 are each independently, a single bond, or a substituted or unsubstituted arylene group having 6 to 18 ring carbon atoms, Ar 31 , Ar 32and Ar 33 are each independently, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms; a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms, or -Si(R C1 )(R C2 )(R C3 ) is a group represented by R C1、 R C2 and R C3 each independently represents a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, R C1 If there are multiple R C1 are the same or different from each other, R C2 If there are multiple R C2 are the same or different from each other, R C3 If there are multiple R C3 are either identical or different.)

[0740] [ka]

[0741] (In the formula (H2), A 41 and A 42 are each independently, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms, R 410 ~R 414 One or more pairs of adjacent pairs 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 420 ~R 424One or more pairs of adjacent pairs 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 does not form the substituted or unsubstituted monocyclic ring and does not form the substituted or unsubstituted fused ring 410 ~R 414 and R 420 ~R 424 are each independently, hydrogen atoms, cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms; a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R 901 )(R 902 )(R 903 ) a group represented by -O-(R 904 ) a group represented by halogen atoms, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, m1 is 3, and three R 410 are the same or different from each other, m2 is 3, and 3 R 420 are the same or different from each other, L 41 and L 42 are each independently, single bond, a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or It is a substituted or unsubstituted divalent heterocyclic group having 5 to 30 ring atoms.

[0742] (In the third compound represented by the formula (H2), R 901 , R 902 , R 903 and 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 the same or different from each other, R 902 If there are multiple R 902 are the same or different from each other, R 903 If there are multiple R 903 are the same or different from each other, R 904 If there are multiple R 904 are either identical or different.)

[0743] In the organic EL device according to this embodiment, the third compound, Ar 31 , Ar 32 and Ar 33 It is also preferable that at least one of the above is a group represented by the following formula (H1A).

[0744] [ka]

[0745] (In the formula (H1A), X3 is an oxygen atom, a sulfur atom, or NR 319 or C(R 320 )(R 321 ) and R 311 ~R 318 A pair of two or more adjacent 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 320 and R 321 The set 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 311 ~R 321 One of the bonds is a single bond that connects to *a, or R 311 ~R 318 a carbon atom constituting the ring skeleton of the substituted or unsubstituted monocyclic ring or the substituted or unsubstituted fused ring formed by bonding together a pair of adjacent two or more of the above is bonded to *a by a single bond, or R 320 and R 321 a carbon atom constituting a ring skeleton of the substituted or unsubstituted monocyclic ring or the substituted or unsubstituted fused ring formed by bonding together a pair consisting of: R that does not form the substituted or unsubstituted monocyclic ring or the substituted or unsubstituted fused ring and is not a single bond bonded to *a 311 ~R 318 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms; a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 10 ring atoms, *R that is not a single bond attached to a 319 teeth, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms, *R is not a single bond bonded to a, does not form the substituted or unsubstituted monocyclic ring, and does not form the substituted or unsubstituted fused ring320 and R 321 are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms, ** indicates independently L 31 , L 32 Or L 33 or the bonding position to the nitrogen atom of the amino group.

[0746] In at least one group of the formula (H1A) of the third compound, R 311 ~R 318 It is also preferred that at least one pair of adjacent two or more of the above be bonded to each other to form a substituted or unsubstituted monocycle or a substituted or unsubstituted fused ring.

[0747] In at least one group of the formula (H1A) of the third compound, R 311 ~R 318 It is also preferred that at least one pair of adjacent two or more of the above be bonded to each other to form a substituted or unsubstituted benzene ring.

[0748] In at least one group of the formula (H1A) of the third compound, R 311 ~R 318 It is also preferred that one or two pairs of adjacent two or more of the above be bonded to each other to form a substituted or unsubstituted benzene ring.

[0749] In at least one group of the formula (H1A) of the third compound, R 311 ~R 318 It is also preferred that no pair of adjacent two or more of the above is bonded to each other.

[0750] In the organic EL device according to this embodiment, the third compound is a monoamine compound having one substituted or unsubstituted amino group in the molecule; a diamine compound having two substituted or unsubstituted amino groups in the molecule; a triamine compound having three substituted or unsubstituted amino groups in the molecule, and It is also preferable that the amine compound is at least one selected from the group consisting of tetraamine compounds having four substituted or unsubstituted amino groups in the molecule.

[0751] In the organic EL device according to this embodiment, the third compound is preferably at least one amine compound selected from the group consisting of monoamine compounds and diamine compounds.

[0752] In the organic EL device according to this embodiment, the third compound is also preferably a monoamine compound.

[0753] In the organic EL device according to this embodiment, the hole transport layer can be formed using an aromatic amine compound, a carbazole derivative, an anthracene derivative, etc. 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, etc. 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 A material with a hole mobility of at least / (V·s).

[0754] The hole transport layer may be formed using carbazole derivatives such as CBP, 9-[4-(N-carbazolyl)]phenyl-10-phenylanthracene (CzPA), and 9-phenyl-3-[4-(10-phenyl-9-anthryl)phenyl]-9H-carbazole (PCzPA), as well as 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.

[0755] However, other substances may be used as long as they have a higher hole-transporting property than an electron-transporting property. Note that the layer containing the substance having a high hole-transporting property may be not only a single layer, but also a stack of two or more layers containing the above-mentioned substances.

[0756] (electron barrier 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.

[0757] (electron transport layer) The electron transport layer is a layer containing a substance with a high electron transport property. The electron transport layer contains an electron transport layer material. The electron transport layer material is different from the first hole blocking layer material and the second hole blocking layer material.

[0758] In one aspect of the organic EL device according to this embodiment, the electron transport layer material is represented by the following formula (E1).

[0759] [ka]

[0760] (In the formula (E1), X 51 , X 52 and X 53 are each independently a nitrogen atom or CR5, However, X 51 , X 52 and X 53 at least one of which is a nitrogen atom, R5 is hydrogen atoms, cyano group, 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, -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, Ax is a substituted or unsubstituted aryl group having 6 to 18 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 13 ring atoms, Bx is a substituted or unsubstituted aryl group having 6 to 18 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 13 ring atoms, L5 is single bond, a substituted or unsubstituted (n+1)-valent aromatic hydrocarbon ring group having 6 to 18 ring carbon atoms, or a substituted or unsubstituted (n+1)-valent heterocyclic group having 5 to 13 ring atoms, n is 1, 2 or 3, and when n is 2 or 3, L5 is not a single bond, Cx is independently a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 60 ring atoms, When a plurality of Cx's are present, the plurality of Cx's may be the same or different from one another, R 901 , R 902 , R 903 , and 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 the same or different from each other, R 902 If there are multiple R 902 are the same or different from each other, R 903 If there are multiple R 903 are the same or different from each other, R 904 If there are multiple R 904 are the same or different from each other, R 905 If there are multiple R 905 are the same or different from each other, R 801 If there are multiple R 801 are the same or different from each other, R 802 If there are multiple R 802 are either identical or different.)

[0761] In the organic EL device according to this embodiment, X of the compound represented by formula (E1) 51 , X 52 and X 53 Among these, it is preferred that two or three are nitrogen atoms.

[0762] In the organic EL device according to this embodiment, the compound represented by formula (E1) is preferably a compound represented by the following formula (E11), (E12), (E13) or (E14).

[0763] [ka]

[0764] (In the formulae (E11) to (E14), Ax, Bx, Cx, R5, L5, and n are each as defined in the formula (E1).)

[0765] In the organic EL device according to this embodiment, the electron transport layer can be formed using 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.Specific 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, we have also developed 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. In this embodiment, benzimidazole compounds can be preferably used. The substances mentioned here are mainly 10 -6 cm 2 / (V·s) or more. Note that other substances may be used as the electron-transporting layer as long as they have a higher electron-transporting property than a hole-transporting property. The electron-transporting layer may be formed as a single layer or as a stack of two or more layers made of the above-mentioned substances.

[0766] 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) and poly[(9,9-dioctylfluorene-2,7-diyl)-co-(2,2'-bipyridine-6,6'-diyl)] (abbreviation: PF-BPy).

[0767] (electron injection layer) The electron injection layer is a layer containing a substance with high electron injection properties. In the organic EL device according to this embodiment, the electron injection layer can be made of alkali metals, alkaline earth metals, or compounds thereof, such as lithium (Li), cesium (Cs), calcium (Ca), lithium fluoride (LiF), cesium fluoride (CsF), calcium fluoride (CaF), and lithium oxide (LiOx). 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 more efficiently performed.

[0768] 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.

[0769] (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 known methods can be used, such as dry film formation methods such as vacuum deposition, sputtering, plasma deposition, and ion plating, and wet film formation methods such as spin coating, dipping, flow coating, and inkjet deposition.

[0770] (film thickness) The thickness of each organic layer in the organic EL device of this embodiment is not limited unless otherwise specified above. Generally, if the thickness is too thin, defects such as pinholes are likely to occur, and if the thickness is too thick, a high applied voltage is required, resulting in poor efficiency. Therefore, the thickness of each organic layer in the organic EL device is usually preferably in the range of several nm to 1 μm.

[0771] (Emission wavelength of organic EL element) The organic electroluminescent element according to this embodiment preferably emits light having a maximum peak wavelength of 500 nm or less when the element is in operation. The organic electroluminescent element according to this embodiment preferably emits light having a maximum peak wavelength of 430 nm or more and 480 nm or less when the element is driven. The maximum peak wavelength of light emitted from the organic EL element when the element is driven is measured as follows: 2 A voltage is applied to the organic EL element so that the spectral radiance spectrum is measured using a spectroradiometer CS-2000 (Konica Minolta, Inc.) In the obtained spectral radiance spectrum, the peak wavelength of the emission spectrum at which the emission intensity is maximum is measured and this is defined as the maximum peak wavelength (unit: nm).

[0772] Second Embodiment (electronic equipment) The electronic device according to this embodiment is equipped with the organic EL element according to any one of the above-described embodiments. 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, for example, as a backlight for a display device.

[0773] [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.

[0774] For example, the number of light-emitting layers in the organic EL element is not limited to two, and three or more light-emitting layers may be stacked. When the organic EL element has three or more light-emitting layers, it is sufficient that at least two of the light-emitting layers (the first light-emitting layer and the second light-emitting layer) satisfy the conditions described in the above embodiment. For example, the other light-emitting layers may be fluorescent light-emitting layers or phosphorescent light-emitting layers that utilize light emission due to electron transition from a triplet excited state directly to the ground state.

[0775] Furthermore, for example, the number of light-emitting layers in the organic EL element may be 1. When the organic EL element has one light-emitting layer, the light-emitting layer preferably has the same configuration as the second light-emitting layer described above.

[0776] Furthermore, when the organic EL element has a plurality of light-emitting layers, these light-emitting layers may be provided adjacent to each other, or the organic EL element may be a so-called tandem type organic EL element in which a plurality of light-emitting units are stacked via an intermediate layer.

[0777] 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]

[0778] 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.

[0779] <Compound> The structures of the compounds used as the first hole blocking layer materials in the production of the organic EL devices according to Examples 1A, 2A, 1 to 26, and 29 to 44 are shown below.

[0780] [ka]

[0781] [ka]

[0782] [ka]

[0783] [ka]

[0784] [ka]

[0785] [ka]

[0786] [ka]

[0787] [ka]

[0788] [ka]

[0789] [ka]

[0790] [ka]

[0791] [ka]

[0792] The structures of the compounds used as the first host material in the production of the organic EL devices according to Examples 1A, 2A, 1 to 26, and 29 to 44, and Comparative Examples 1A, 1 to 13, and 15 to 22 are shown below. In Example 1, the compound HBL used as the first hole-blocking layer material and the compound BH1 used as the first host material were the same compound, but since the layers in which these compounds were contained were different, different names were given to the compounds. The same applies to Examples 1A, 2A, 2 to 26, and 29 to 44.

[0793]

change

[0794]

change

[0795]

change

[0796]

change

[0797]

change

[0798]

change

[0799]

change

[0800]

change

[0801]

change

[0802]

change

[0803]

change

[0804] [ka]

[0805] The structures of the compounds used as second host materials (emission band materials) in the production of organic EL devices according to Examples 1A, 2A, 1 to 26, and 29 to 44, and Comparative Examples 1A, 1 to 13, and 15 to 22 are shown below.

[0806] [ka]

[0807] The structures of the first light-emitting compound, second light-emitting compound, or second hole-blocking layer material used in the production of the organic EL devices according to Examples 1A, 2A, 1 to 26, and 29 to 44, and Comparative Examples 1A, 1 to 13, and 15 to 22 are shown below.

[0808] [ka]

[0809] The structures of other compounds used in the production of the organic EL devices according to Examples 1A, 2A, 1 to 26, and 29 to 44, and Comparative Examples 1A, 1 to 13, and 15 to 22 are shown below.

[0810] [ka]

[0811] [ka]

[0812] <Fabrication of organic EL elements> An organic EL device was fabricated and evaluated as follows.

[0813] [Examples 1A, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, and 25] The organic EL devices of Examples 1A, 3, 5, 7, and 9 were fabricated in the same manner as the organic EL device of Example 1 described below, except that the first host material H1 in the first emitting layer and the first hole-blocking layer material in the hole-blocking layer were changed to have thicknesses shown in Table 1. The organic EL devices of Examples 11, 13, 15, 17, and 19 were fabricated in the same manner as the organic EL device of Example 1 described below, except that the first host material H1 in the first emitting layer and the first hole-blocking layer material in the hole-blocking layer were changed to have thicknesses shown in Table 2. The organic EL devices of Examples 21, 23, and 25 were fabricated in the same manner as the organic EL device of Example 1 described below, except that the first host material H1 in the first emitting layer and the first hole-blocking layer material in the hole-blocking layer were changed to have thicknesses shown in Table 3.

[0814] [Examples 2A, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, and 26] The organic EL devices of Examples 2A, 4, 6, 8, and 10 were fabricated in the same manner as the organic EL device of Example 1 described below, except that the first host material H1 in the first emitting layer, the film thickness of the second emitting layer, and the first hole-blocking layer material and film thickness in the hole-blocking layer were changed to the materials and film thicknesses shown in Table 1. The organic EL devices of Examples 12, 14, 16, 18, and 20 were fabricated in the same manner as the organic EL device of Example 1 described below, except that the first host material H1 in the first emitting layer, the film thickness of the second emitting layer, and the first hole-blocking layer material and film thickness in the hole-blocking layer were changed to the materials and film thicknesses shown in Table 2. The organic EL devices of Examples 22, 24, and 26 were fabricated in the same manner as the organic EL device of Example 1 described below, except that the first host material H1 in the first emitting layer, the film thickness of the second emitting layer, and the first hole-blocking layer material and film thickness in the hole-blocking layer were changed to the materials and film thicknesses shown in Table 3.

[0815] [Comparative Examples 1A, 2 to 13] The organic EL devices of Comparative Examples 1A and 2 to 13 were fabricated in the same manner as the organic EL device of Example 1 described later, except that the hole-blocking layer in Example 1 described later was not formed, the proportion of the second host material (compound BH2-1 and compound BH2-2) in the second emitting layer was changed, and the film thickness of the second emitting layer was changed to 15 nm.

[0816] Example 1 A 25mm x 75mm x 1.1mm thick glass substrate (manufactured by Geomatec Co., Ltd.) with an ITO (Indium Tin Oxide) transparent electrode (anode) was ultrasonically cleaned in isopropyl alcohol for 5 minutes and then UV ozone cleaned for 30 minutes. The ITO transparent electrode had a film thickness of 130nm. The washed glass substrate with transparent electrode lines was mounted on a substrate holder in a vacuum deposition apparatus, and the compounds HT1 and HA were co-deposited on the surface on which the transparent electrode lines were formed so as to cover the transparent electrode, thereby forming a hole injection layer with a thickness of 10 nm. The proportion of compound HT1 in the hole injection layer was 97% by mass, and the proportion of compound HA was 3% by mass. Next, the compound HT1 was vapor-deposited on this hole injection layer to form a first hole transport layer having a thickness of 77.5 nm. Next, a compound EBL was vapor-deposited on the first hole transport layer to form a second hole transport layer (sometimes referred to as an electron blocking layer) having a thickness of 7.5 nm. Next, on the second hole transport layer, a compound BH1 (first host material H1) and a compound BD (first light-emitting compound) were co-deposited to form a first light-emitting layer having a thickness of 5 nm. The proportion of the compound BH1 in the first light-emitting layer was 98 mass %, and the proportion of the compound BD was 2 mass %. Next, on the first emitting layer, compound BH2-1 (second host material H2-1 as an emitting band material), compound BH2-2 (second host material H2-2 as an emitting band material), and compound BD (second emitting compound) were co-deposited to form a second emitting layer with a thickness of 12 nm. The proportions of compound BH2-1, compound BH2-2, and compound BD in the second emitting layer were 49 mass% and 49 mass%, respectively, and 2 mass%. Next, compound HBL (first hole-blocking layer material) and compound BD (second hole-blocking layer material) were co-deposited on the second emitting layer to form a hole-blocking layer with a thickness of 3 nm, in which the proportion of compound HBL in the hole-blocking layer was 98% by mass and the proportion of compound BD in the hole-blocking layer was 2% by mass. Next, the compound ET1 was vapor-deposited on the hole-blocking layer to form a first electron-transporting layer having a thickness of 5 nm. Next, compound ET2 and compound Liq were co-deposited on the first electron-transporting layer to form a second electron-transporting layer with a thickness of 25 nm. Liq is an abbreviation for (8-quinolinolato)lithium. The proportion of compound ET2 in the second electron-transporting layer was 67% by mass, and the proportion of compound Liq was 33% by mass. Next, metal Yb was vapor-deposited on the second electron transport layer to form an electron injection layer with a thickness of 1 nm. Next, metallic Al was vapor-deposited on the electron injection layer to form a cathode with a thickness of 80 nm. The device configuration of Example 1 is shown in outline below. ITO(130) / HT1:HA(10,97%:3%) / HT1(77.5) / EBL(7.5) / BH1:BD(5,98%:2%) / BH2-1:BH2-2 :BD(12,49%:49%:2%) / HBL:BD(3,98%:2%) / ET1(5) / ET2:Liq(25,67%:33%) / Yb(1) / Al(80) In the element configurations shown in simplified form, the numbers in parentheses indicate film thicknesses (unit: nm). Similarly, in parentheses, the figures expressed in percentages (97%:3%) indicate the proportions (mass%) of compound HT1 and compound HA in the hole-injection layer, the figures expressed in percentages (98%:2%) indicate the proportions (mass%) of compound BH1 (first host material H1) and compound BD (first light-emitting compound) in the first light-emitting layer, the figures expressed in percentages (49%:49%:2%) indicate the proportions (mass%) of second host materials H2-1 and H2-2 (compounds BH2-1 and BH2-2) and the second light-emitting compound (compound BD) in the second light-emitting layer, the figures expressed in percentages (98%:2%) indicate the proportions (mass%) of the first hole-blocking layer material (HBL) and the second hole-blocking layer material (compound BD) in the hole-blocking layer, and the figures expressed in percentages (67%:33%) indicate the proportions (mass%) of compound ET2 and compound Liq in the second electron-transporting layer.

[0817] Example 2 The organic EL device of Example 2 was fabricated in the same manner as the organic EL device of Example 1, except that the thicknesses of the second emitting layer and the hole blocking layer were changed to those shown in Table 4.

[0818] Comparative Example 1 The organic EL device of Comparative Example 1 was fabricated in the same manner as the organic EL device of Example 1, except that the hole-blocking layer in Example 1 was not formed, the ratio of the second host material (compounds BH2-1 and BH2-2) in the second emitting layer was changed, and the film thickness of the second emitting layer was changed to 15 nm.

[0819] [Examples 29, 31, 33, 35, 37, 39, 41, and 43] The organic EL devices of Examples 29, 31, 33, 35, and 37 were fabricated in the same manner as the organic EL device of Example 1, except that the first host material H1 in the first emitting layer and the first hole-blocking layer material in the hole-blocking layer were changed to the film thicknesses shown in Table 5. The organic EL devices of Examples 39, 41, and 43 were fabricated in the same manner as the organic EL device of Example 1, except that the first host material H1 in the first emitting layer and the first hole-blocking layer material in the hole-blocking layer were changed to the film thicknesses shown in Table 6.

[0820] [Examples 30, 32, 34, 36, 38, 40, 42, and 44] The organic EL devices of Examples 30, 32, 34, 36, and 38 were fabricated in the same manner as the organic EL device of Example 1, except that the first host material H1 in the first emitting layer, the film thickness of the second emitting layer, and the first hole-blocking layer material and film thickness in the hole-blocking layer were changed to the materials and film thicknesses shown in Table 5. The organic EL devices of Examples 40, 42, and 44 were fabricated in the same manner as the organic EL device of Example 1, except that the first host material H1 in the first emitting layer, the film thickness of the second emitting layer, and the first hole-blocking layer material and film thickness in the hole-blocking layer were changed to the materials and film thicknesses shown in Table 6.

[0821] Comparative Examples 15 to 22 The organic EL devices of Comparative Examples 15 to 22 were fabricated in the same manner as the organic EL device of Example 1, except that the hole-blocking layer in Example 1 described below was not formed, the proportion of the second host material (compound BH2-1 and compound BH2-2) in the second emitting layer was changed, and the film thickness of the second emitting layer was changed to 15 nm.

[0822] <Evaluation of organic EL elements> The organic EL devices fabricated in Examples 1A, 2A, 1 to 26, and 29 to 44, and Comparative Examples 1A, 1 to 13, and 15 to 22 were evaluated as follows. The evaluation results are shown in Tables 7 to 12.

[0823] (CIE1931 chromaticity) The current density of the fabricated organic EL device was 10 mA / cm 2 The CIE1931 chromaticity coordinates (x, y) when a voltage was applied so as to satisfy the following equation were measured using a spectroradiometer CS-2000 (manufactured by Konica Minolta, Inc.).

[0824] (Maximum peak wavelength λ when the element is driven EL and emission half-width FWHM) The current density of the fabricated organic EL device was 10 mA / cm 2 The spectral radiance spectrum when a voltage was applied so that the maximum peak wavelength λ was obtained was measured using a spectroradiometer CS-2000 (manufactured by Konica Minolta, Inc.). EL The full width at half maximum (FWHM) (unit: nm) and the full width at half maximum (FWHM) were calculated.

[0825] (External quantum efficiency EQE) The current density of the fabricated organic EL device was 10 mA / cm 2 The spectral radiance spectrum when a voltage was applied so that the value was 1 / 2 was measured using a spectroradiometer CS-2000 (manufactured by Konica Minolta, Inc.) From the obtained spectral radiance spectrum, the external quantum efficiency EQE (unit: %) was calculated, assuming that Lambertian radiation was performed.

[0826] The "EQE (relative value)" (unit: %) shown in Tables 7 to 12 was calculated based on the measured EQE value for each example and the following mathematical formulas (101) to (113), (2X), and (115) to (122).

[0827] (Examples 1A and 2A, and Comparative Example 1A) EQE (relative value) = (EQE of each example / EQE of Comparative Example 1A) × 100 (equation 101)

[0828] (Examples 3 to 4 and Comparative Example 2) EQE (relative value) = (EQE of each example / EQE of Comparative Example 2) × 100 (Equation 102)

[0829] (Examples 5 to 6 and Comparative Example 3) EQE (relative value) = (EQE of each example / EQE of Comparative Example 3) × 100 (equation 103)

[0830] (Examples 7 to 8 and Comparative Example 4) EQE (relative value) = (EQE of each example / EQE of Comparative Example 4) × 100 (104)

[0831] (Examples 9 to 10 and Comparative Example 5) EQE (relative value) = (EQE of each example / EQE of Comparative Example 5) × 100 (number 105)

[0832] (Examples 11 to 12 and Comparative Example 6) EQE (relative value) = (EQE of each example / EQE of Comparative Example 6) × 100 (number 106)

[0833] (Examples 13 to 14 and Comparative Example 7) EQE (relative value) = (EQE of each example / EQE of Comparative Example 7) × 100 (equation 107)

[0834] (Examples 15 to 16 and Comparative Example 8) EQE (relative value) = (EQE of each example / EQE of Comparative Example 8) × 100 (number 108)

[0835] (Examples 17 to 18 and Comparative Example 9) EQE (relative value) = (EQE of each example / EQE of Comparative Example 9) × 100 (number 109)

[0836] (Examples 19 to 20 and Comparative Example 10) EQE (relative value) = (EQE of each example / EQE of Comparative Example 10) × 100 (number 110)

[0837] (Examples 21 to 22 and Comparative Example 11) EQE (relative value) = (EQE of each example / EQE of Comparative Example 11) × 100 (equation 111)

[0838] (Examples 23 to 24 and Comparative Example 12) EQE (relative value) = (EQE of each example / EQE of Comparative Example 12) × 100 (Equation 112)

[0839] (Examples 25 to 26 and Comparative Example 13) EQE (relative value) = (EQE of each example / EQE of Comparative Example 13) × 100 (Equation 113)

[0840] (Examples 1 and 2 and Comparative Example 1) EQE (relative value) = (EQE of each example / EQE of Comparative Example 1) × 100 (number 2X)

[0841] (Examples 29 to 30 and Comparative Example 15) EQE (relative value) = (EQE of each example / EQE of Comparative Example 15) × 100 (equation 115)

[0842] (Examples 31 to 32 and Comparative Example 16) EQE (relative value) = (EQE of each example / EQE of Comparative Example 16) × 100 (equation 116)

[0843] (Examples 33 to 34 and Comparative Example 17) EQE (relative value) = (EQE of each example / EQE of Comparative Example 17) × 100 (Equation 117)

[0844] (Examples 35 to 36 and Comparative Example 18) EQE (relative value) = (EQE of each example / EQE of Comparative Example 18) × 100 (equation 118)

[0845] (Examples 37 to 38 and Comparative Example 19) EQE (relative value) = (EQE of each example / EQE of Comparative Example 19) × 100 (Equation 119)

[0846] (Examples 39 to 40 and Comparative Example 20) EQE (relative value) = (EQE of each example / EQE of Comparative Example 20) × 100 (number 120)

[0847] (Examples 41 to 42 and Comparative Example 21) EQE (relative value) = (EQE of each example / EQE of Comparative Example 21) × 100 (Equation 121)

[0848] (Examples 43 to 44 and Comparative Example 22) EQE (relative value) = (EQE of each example / EQE of Comparative Example 22) × 100 (Equation 122)

[0849] [Table 1]

[0850] [Table 2]

[0851] [Table 3]

[0852] [Table 4]

[0853] [Table 5]

[0854] [Table 6]

[0855] [Table 7]

[0856] [Table 8]

[0857] [Table 9]

[0858] [Table 10]

[0859] [Table 11]

[0860] [Table 12]

[0861] The organic EL devices according to Examples 1A, 2A, 1 to 26, and 29 to 44 had improved external quantum efficiency EQE and improved luminous efficiency of the entire device.

[0862] <Compound evaluation> (Triplet energy T1) The compound to be measured was dissolved in EPA (diethyl ether: isopentane: ethanol = 5:5:2 (volume ratio)) to a concentration of 10 μmol / L to obtain a solution, and this solution was placed in a quartz cell to serve as a measurement sample. The phosphorescence spectrum (vertical axis: phosphorescence intensity, horizontal axis: wavelength) of this measurement sample was measured at low temperature (77 [K]), and a tangent was drawn to the rising edge of the short wavelength side of this phosphorescence spectrum, and the wavelength value λ at the intersection of the tangent and the horizontal axis was determined. edge The triplet energy T1 was calculated from the following conversion formula (F1) based on [nm]. Note that the triplet energy T1 may have an error of about 0.02 eV depending on the measurement conditions. Conversion formula (F1): T1[eV]=1239.85 / λ edge

[0863] The tangent to the rising edge of the phosphorescence spectrum on the short wavelength side is drawn as follows: When moving along the spectral curve from the short wavelength side of the phosphorescence spectrum to the shortest maximum of the spectral maxima, consider the tangent at each point on the curve toward the long wavelength side. The slope of this tangent increases as the curve rises (i.e., as the vertical axis increases). The tangent drawn at the point where this slope is at its maximum (i.e., the tangent at the inflection point) is the tangent to the rising edge of the phosphorescence spectrum on the short wavelength side. Note that a maximum point having a peak intensity that is 15% or less of the maximum peak intensity of the spectrum is not included in the above-mentioned maximum value on the shortest wavelength side, and the tangent drawn at the point where the slope value is the maximum value that is closest to the maximum value on the shortest wavelength side is defined as the tangent to the rising edge on the short wavelength side of the phosphorescence spectrum. The phosphorescence was measured using a spectrofluorometer model F-4500 manufactured by Hitachi High-Tech Science Corporation.

[0864] The triplet energy T1 of compound BH1 was 2.07 eV. Table 1 shows the measurement results of the triplet energy T1 of compounds BH2-1, BH2-2, and HBL.

[0865] (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 of 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 singlet energy. Conversion formula (F2): S1[eV]=1239.85 / λedge The absorption spectrum measuring device used was a spectrophotometer (device name: U3310) manufactured by Hitachi High-Tech Science Corporation.

[0866] 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. ...

Claims

1. An organic electroluminescence element, an anode; A cathode; a light-emitting zone disposed between the anode and the cathode; a hole blocking layer disposed between the light-emitting zone and the cathode; the hole blocking layer comprises a first hole blocking layer material and a second hole blocking layer material; the second hole blocking layer material is a compound that exhibits fluorescent emission with a maximum peak wavelength of 500 nm or less, the emission band comprises an emission band material; The triplet energy T of the first hole blocking layer material １ (M1), and the triplet energy T of the emission band material １ (M2) satisfies the relationship of the following formula (Formula 1), Organic electroluminescent element. T １ (M1) > T １ (M2) … (Number 1)

2. the light-emitting region and the hole-blocking layer are in direct contact with each other; The organic electroluminescence device according to claim 1 .

3. The first hole blocking layer material is represented by the following formula (HB11), (HB12), (HB13), (HB14), (HB15), or (HB16):

3. The organic electroluminescence device according to claim 1 or 2. 【Chemistry 1】 (In the formula (HB11), R １０１ ~R １１０ , and R １１１ ~R １２０ are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by -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 -B(OR ９３８ ) (OR ９３９ ) a group represented by -O-S(=O) ２ (R ９４０ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ a group represented by -COOR ８０２ a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, However, R １０１ ~R １１０ One of them is L １０１ indicates the bonding position with R １１１ ~R １２０ One of them is L １０１ indicates the bonding position with L １０１ teeth, single bond, a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms, ma is 0, 1, 2, 3, 4 or 5; L １０１ When there are two or more, there are two or more L １０１ are the same or different from each other.) 【Chemistry 2】 (In the formula (HB12), R １２１ ~R １３０ , Ar １２１ and Ar １２２ are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by -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 -B(OR ９３８ ) (OR ９３９ ) a group represented by -O-S(=O) ２ (R ９４０ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ a group represented by -COOR ８０２ a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or is a group represented by the formula (HB121), However, R １２１ ~R １３０ , Ar １２１ and Ar １２２ at least one of is a group represented by formula (HB121) above, When a plurality of groups represented by the formula (HB121) are present, the plurality of groups represented by the formula (HB121) are the same or different from each other, L １０２ teeth, single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar １０２ teeth, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, mb is 0, 1, 2, 3, 4 or 5; L １０２ When there are two or more, there are two or more L １０２ are identical to or different from each other, Ar １０２ When two or more are present, two or more Ar １３ are identical to or different from each other, * in the formula (HB121) indicates the bonding position to the benz[a]anthracene ring in the formula (HB12). 【Transformation 3】 (In the formula (HB13), R １３１ ~R １４０ , and R １４１ ~R １５０ are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by -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 -B(OR ９３８ ) (OR ９３９ ) a group represented by -O-S(=O) ２ (R ９４０ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ a group represented by -COOR ８０２ a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, However, R １３１ ~R １４０ One of them is L １０３ indicates the bonding position with R １４１ ~R １５０ One of them is L １０３ indicates the bonding position with L １０３ teeth, single bond, a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms, mc is 0, 1, 2, 3, 4 or 5; L １０３ When there are two or more, there are two or more L １０３ are the same or different from each other.) 【Chemistry 4】 (In the formula (HB14), R １５１ ~R １６２ , and R １６３ ~R １７４ are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by -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 -B(OR ９３８ ) (OR ９３９ ) a group represented by -O-S(=O) ２ (R ９４０ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ a group represented by -COOR ８０２ a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, However, R １５１ ~R １６２ One of them is L １０４ indicates the bonding position with R １６３ ~R １７４ One of them is L １０４ indicates the bonding position with L １０４ teeth, single bond, a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms, md is 0, 1, 2, 3, 4 or 5; L １０４ When there are two or more, there are two or more L １０４ are the same or different from each other.) 【Transformation 5】 (In the formula (HB15), R １７６ ~R １８７ , and R １８８ ~R １９９ are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by -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 -B(OR ９３８ ) (OR ９３９ ) a group represented by -O-S(=O) ２ (R ９４０ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ a group represented by -COOR ８０２ a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, However, R １７６ ~R １８７ One of them is L １０５ indicates the bonding position with R １８８ ~R １９９ One of them is L １０５ indicates the bonding position with L １０５ teeth, single bond, a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms, me is 0, 1, 2, 3, 4 or 5; L １０５ When there are two or more, there are two or more L １０５ are the same or different from each other.) 【Transformation 6】 (In the formula (HB16), R ２０１ ~R ２１０ are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by -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 -B(OR ９３８ ) (OR ９３９ ) a group represented by -O-S(=O) ２ (R ９４０ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ a group represented by -COOR ８０２ a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or is a group represented by the formula (HB160), However, R ２０１ ~R ２１０ at least one of is a group represented by formula (HB160) above, When a plurality of groups represented by the formula (HB160) are present, the plurality of groups represented by the formula (HB160) are the same or different from each other, L １０６ teeth, single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar １０６ teeth, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, mf is 0, 1, 2, 3, 4 or 5; L １０６ When there are two or more, there are two or more L １０６ are identical to or different from each other, Ar １０６ When two or more are present, two or more Ar １０６ are identical to or different from each other, In the formula (HB160), * indicates the bonding position to the pyrene ring in the formula (HB16). (In the formulae (HB11), (HB12), (HB13), (HB14), (HB15), and (HB16), R ９０１ , R ９０２ , R ９０３ , R ９０４ , R ９０５ , R ９３１ , R ９３２ , R ９３３ , R ９３４ , R ９３５ , R ９３６ , R ９３７ , R ９３８ , R ９３９ , R ９４０ , R ８０１ and R ８０２ are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R ９０１ If there are multiple R ９０１ are the same or different from each other, R ９０２ If there are multiple R ９０２ are the same or different from each other, R ９０３ If there are multiple R ９０３ are the same or different from each other, R ９０４ If there are multiple R ９０４ are the same or different from each other, R ９０５ If there are multiple R ９０５ are the same or different from each other, R ９３１ If there are multiple R ９３１ are the same or different from each other, R ９３２ If there are multiple R ９３２ are the same or different from each other, R ９３３ If there are multiple R ９３３ are the same or different from each other, R ９３４ If there are multiple R ９３４ are the same or different from each other, R ９３５ If there are multiple R ９３５ are the same or different from each other, R ９３６ If there are multiple R ９３６ are the same or different from each other, R ９３７ If there are multiple R ９３７ are the same or different from each other, R ９３８ If there are multiple R ９３８ are the same or different from each other, R ９３９ If there are multiple R ９３９ are the same or different from each other, R ９４０ If there are multiple R ９４０ are the same or different from each other, R ８０１ If there are multiple R ８０１ are the same or different from each other, R ８０２ If there are multiple R ８０２ are the same or different from each other.)

4. the first hole blocking layer material and the second hole blocking layer material do not contain an azine derivative; The organic electroluminescence device according to claim 1 .

5. the first hole blocking layer material has one or more deuterium atoms; The organic electroluminescence device according to claim 1 .

6. an electron transporting zone disposed between the hole blocking layer and the cathode; The organic electroluminescence device according to claim 1 .

7. the hole blocking layer and the electron transporting region are in direct contact with each other; The organic electroluminescence device according to claim 6 .

8. the electron-transporting region comprises one or more electron-transporting layers; the one or more electron transport layers comprise an electron transport layer material; the electron transport layer material is different from the first hole blocking layer material and the second hole blocking layer material; The organic electroluminescence device according to claim 6 or 7.

9. The electron transport layer material is represented by the following formula (E1): The organic electroluminescence device according to claim 8 . 【Transformation 7】 (In the formula (E1), X ５１ , X ５２ and X ５３ are each independently a nitrogen atom or CR ５ and However, X ５１ , X ５２ and X ５３ at least one of which is a nitrogen atom, R ５ teeth, hydrogen atoms, cyano group, 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, -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, Ax is a substituted or unsubstituted aryl group having 6 to 18 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 13 ring atoms, Bx is a substituted or unsubstituted aryl group having 6 to 18 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 13 ring atoms, L ５ teeth, single bond, a substituted or unsubstituted (n+1)-valent aromatic hydrocarbon ring group having 6 to 18 ring carbon atoms, or a substituted or unsubstituted (n+1)-valent heterocyclic group having 5 to 13 ring atoms, n is 1, 2, or 3, and when n is 2 or 3, L ５ is not a single bond, Each Cx independently represents: a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 60 ring atoms, When a plurality of Cx's are present, the Cx's are the same or different from one another; R ９０１ , R ９０２ , R ９０３ , and 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 the same or different from each other, R ９０２ If there are multiple R ９０２ are the same or different from each other, R ９０３ If there are multiple R ９０３ are the same or different from each other, R ９０４ If there are multiple R ９０４ are the same or different from each other.)

10. the electron transporting region has a first electron transporting layer and a second electron transporting layer; The organic electroluminescence device according to any one of claims 6 to 9.

11. the light-emitting zone includes a first light-emitting layer and a second light-emitting layer; the first light-emitting layer contains a first host material and a first light-emitting compound; the second light-emitting layer contains a second host material and a second light-emitting compound; the second host material is the emission band material; the first luminescent compound is a compound that exhibits fluorescent emission with a maximum peak wavelength of 500 nm or less, the second luminescent compound is a compound that exhibits fluorescent emission with a maximum peak wavelength of 500 nm or less, The triplet energy T of the first host material １ (H1) and the triplet energy T １ (H2) satisfies the relationship of the following formula (Formula 2), The triplet energy T of the first hole blocking layer material １ (M1) and the triplet energy T １ (H2) satisfies the relationship of the following formula (Formula 3): The organic electroluminescence device according to claim 1 . T １ (H1) > T １ (H2) …(Number 2) T １ (M1) > T １ (H2) …(Number 3)

12. the first light-emitting layer, the second light-emitting layer, and the hole-blocking layer are stacked in this order from the anode side; The organic electroluminescence device according to claim 11 .

13. the second light-emitting layer has a thickness greater than that of the first light-emitting layer, and the thickness of the second light-emitting layer is greater than that of the hole-blocking layer; The organic electroluminescence device according to claim 12 .

14. the second light-emitting layer and the hole blocking layer are in direct contact with each other; The organic electroluminescence device according to claim 12 or 13.

15. The second host material is represented by the following formula (H17): The organic electroluminescence device according to any one of claims 11 to 14. 【Transformation 8】 (In the formula (H17), R ５１Ｈ ~R ５８Ｈ are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by -N(R ９０６ ) (R ９０７ ) a group represented by -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 -B(OR ９３８ ) (OR ９３９ ) a group represented by -O-S(=O) ２ (R ９４０ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ a group represented by -COOR ８０２ a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, L １４１Ｈ and L １４２Ｈ are each independently, single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar １４１Ｈ and Ar １４２Ｈ are each independently, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R ９０１ , R ９０２ , R ９０３ , R ９０４ , R ９０５ , R ９０６ , R ９０７ , R ９３１ , R ９３２ , R ９３３ , R ９３４ , R ９３５ , R ９３６ , R ９３７ , R ９３８ , R ９３９ , R ９４０ , R ８０１ and R ８０２ are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R ９０１ If there are multiple R ９０１ are the same or different from each other, R ９０２ If there are multiple R ９０２ are the same or different from each other, R ９０３ If there are multiple R ９０３ are the same or different from each other, R ９０４ If there are multiple R ９０４ are the same or different from each other, R ９０５ If there are multiple R ９０５ are the same or different from each other, R ９０６ If there are multiple R ９０６ are the same or different from each other, R ９０７ If there are multiple R ９０７ are the same or different from each other, R ９３１ If there are multiple R ９３１ are the same or different from each other, R ９３２ If there are multiple R ９３２ are the same or different from each other, R ９３３ If there are multiple R ９３３ are the same or different from each other, R ９３４ If there are multiple R ９３４ are the same or different from each other, R ９３５ If there are multiple R ９３５ are the same or different from each other, R ９３６ If there are multiple R ９３６ are the same or different from each other, R ９３７ If there are multiple R ９３７ are the same or different from each other, R ９３８ If there are multiple R ９３８ are the same or different from each other, R ９３９ If there are multiple R ９３９ are the same or different from each other, R ９４０ If there are multiple R ９４０ are the same or different from each other, R ８０１ If there are multiple R ８０１ are the same or different from each other, R ８０２ If there are multiple R ８０２ are the same or different from each other.)

16. the second light-emitting layer contains two or more types of the second host material; The organic electroluminescence device according to claim 15 .

17. The first host material is represented by the following formula (H12): The organic electroluminescence device according to any one of claims 11 to 16. 【Chemistry 9】 (In the formula (H12), R ３１Ｈ ~R ４０Ｈ , Ar ３１Ｈ and Ar ３２Ｈ are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, -Si(R ９０１ ) (R ９０２ ) (R ９０３ ) a group represented by -O-(R ９０４ ) a group represented by -S-(R ９０５ ) a group represented by -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 -B(OR ９３８ ) (OR ９３９ ) a group represented by -O-S(=O) ２ (R ９４０ ) a group represented by a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, -C(=O)R ８０１ a group represented by -COOR ８０２ a group represented by halogen atoms, cyano group, nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or is a group represented by the formula (H121), However, R ３１Ｈ ~R ４０Ｈ , Ar ３１Ｈ and Ar ３２Ｈ at least one of is a group represented by formula (H121) above, When a plurality of groups represented by the formula (H121) are present, the plurality of groups represented by the formula (H121) are the same or different from each other, L １２Ｈ teeth, single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, Ar １２Ｈ teeth, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, my is 0, 1, 2, 3, 4 or 5; L １２Ｈ When there are two or more, there are two or more L １２Ｈ are identical to or different from each other, Ar １２Ｈ When two or more are present, two or more Ar １２Ｈ are identical to or different from each other, * in the formula (H121) indicates the bonding position to the benz[a]anthracene ring in the formula (H12), R ９０１ , R ９０２ , R ９０３ , R ９０４ , R ９０５ , R ９３１ , R ９３２ , R ９３３ , R ９３４ , R ９３５ , R ９３６ , R ９３７ , R ９３８ , R ９３９ , R ９４０ , R ８０１ and R ８０２ are each independently, hydrogen atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R ９０１ If there are multiple R ９０１ are the same or different from each other, R ９０２ If there are multiple R ９０２ are the same or different from each other, R ９０３ If there are multiple R ９０３ are the same or different from each other, R ９０４ If there are multiple R ９０４ are the same or different from each other, R ９０５ If there are multiple R ９０５ are the same or different from each other, R ９３１ If there are multiple R ９３１ are the same or different from each other, R ９３２ If there are multiple R ９３２ are the same or different from each other, R ９３３ If there are multiple R ９３３ are the same or different from each other, R ９３４ If there are multiple R ９３４ are the same or different from each other, R ９３５ If there are multiple R ９３５ are the same or different from each other, R ９３６ If there are multiple R ９３６ are the same or different from each other, R ９３７ If there are multiple R ９３７ are the same or different from each other, R ９３８ If there are multiple R ９３８ are the same or different from each other, R ９３９ If there are multiple R ９３９ are the same or different from each other, R ９４０ If there are multiple R ９４０ are the same or different from each other, R ８０１ If there are multiple R ８０１ are the same or different from each other, R ８０２ If there are multiple R ８０２ are the same or different from each other.)

18. the first host material and the first hole blocking layer material are the same as each other; The organic electroluminescence device according to any one of claims 11 to 17.

19. the first host material and the first hole blocking layer material are different from each other; The organic electroluminescence device according to any one of claims 11 to 17.

20. the first light-emitting compound, the second light-emitting compound, and the second hole-blocking layer material are the same as one another; 20. The organic electroluminescence device according to claim 11.

21. the first light-emitting compound, the second light-emitting compound, and the second hole-blocking layer material are different from one another; 20. The organic electroluminescence device according to claim 11.

22. At least one selected from the group consisting of the first light-emitting compound, the second light-emitting compound, and the second hole-blocking layer material is represented by the following formula (6): The organic electroluminescence device according to any one of claims 11 to 21. 【Chemistry 10】 (In the formula (6), Ring a, ring b and ring c each independently represent a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic ring having 5 to 50 ring atoms, R ６０１ and R ６０２ each independently bond to the ring a, the ring b, or the ring c to form a substituted or unsubstituted heterocycle, or do not form a substituted or unsubstituted heterocycle, R that does not form a substituted or unsubstituted heterocycle ６０１ and R ６０２ are each independently, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

23. The first light-emitting compound, the second light-emitting compound, and the second hole-blocking layer material are each independently represented by formula (6):

23. The organic electroluminescence device according to claim 22.

24. a hole transport layer disposed between the anode and the light-emitting zone; The organic electroluminescence device according to any one of claims 1 to 23.

25. An electronic device equipped with the organic electroluminescence element according to any one of claims 1 to 24.

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