WO2023228828A1 - Élément électroluminescent organique et dispositif électronique - Google Patents

Élément électroluminescent organique et dispositif électronique Download PDF

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WO2023228828A1
WO2023228828A1 PCT/JP2023/018371 JP2023018371W WO2023228828A1 WO 2023228828 A1 WO2023228828 A1 WO 2023228828A1 JP 2023018371 W JP2023018371 W JP 2023018371W WO 2023228828 A1 WO2023228828 A1 WO 2023228828A1
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substituted
ring
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裕亮 糸井
佑典 高橋
将太 田中
拓人 深見
司 澤藤
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出光興産株式会社
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
    • C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D311/78—Ring systems having three or more relevant rings
    • C07D311/92—Naphthopyrans; Hydrogenated naphthopyrans
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
    • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
    • C07D405/04—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/12—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising dopants
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
    • H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/14—Carrier transporting layers
    • H10K50/15—Hole transporting layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/14—Carrier transporting layers
    • H10K50/16—Electron transporting layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/19—Tandem OLEDs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60—Organic compounds having low molecular weight

Definitions

  • the present invention relates to an organic electroluminescent device and an electronic device including the organic electroluminescent device.
  • an organic electroluminescent device (hereinafter sometimes referred to as an "organic EL device") is composed of an anode, a cathode, and an organic layer sandwiched between the anode and the cathode.
  • an organic EL device When a voltage is applied between the two electrodes, electrons are injected from the cathode side and holes from the anode side into the light emitting region, and the injected electrons and holes recombine in the light emitting region to generate an excited state. Light is emitted when the state returns to the ground state. Therefore, the development of compounds and device structures that efficiently transport electrons or holes to a light-emitting region and facilitate recombination of electrons and holes is important in obtaining high-performance organic EL devices.
  • Patent Documents 1 to 10 disclose compounds used as materials for organic electroluminescent devices.
  • the present invention was made to solve the above-mentioned problems, and aims to provide an organic EL device with improved device performance and an electronic device including such an organic EL device.
  • the present invention provides the following organic EL device. an anode, a cathode, and an organic layer disposed between the anode and the cathode; the organic layer has a light emitting layer; An organic electroluminescent device in which at least two of the organic layers contain a compound represented by formula (1).
  • X is an oxygen atom or a sulfur atom
  • R 1 to R 6 and R 8 to R 11 are each independently, hydrogen atom, halogen atom, nitro group, cyano group, Substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, 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 heteroaryl group having 5 to 50 ring atoms; A group represented by -Si(R 901 )(R 902 )(R 903 ), A group represented by -O-(R 904 ), A group represented by -Si
  • L is a single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heteroarylene group having 5 to 50 ring atoms, or a carbonized aromatic group having 6 to 50 ring carbon atoms.
  • A is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heteroaryl group having 5 to 50 ring carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms; It is a substituted amino group having two substituents selected from a group and a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms.
  • the present invention provides an electronic device including the organic electroluminescent device.
  • An organic EL device in which two or more organic layers contain the compound represented by formula (1) above exhibits improved device performance.
  • FIG. 1 is a schematic diagram showing an example of a layer structure of an organic EL element according to one embodiment of the present invention.
  • FIG. 3 is a schematic diagram illustrating another example of the layer structure of an organic EL element according to one embodiment of the present invention.
  • FIG. 3 is a schematic diagram illustrating another example of the layer structure of an organic EL element according to one embodiment of the present invention.
  • the hydrogen atom includes isotopes having different numbers of neutrons, ie, light hydrogen (protium), deuterium (deuterium), and tritium (tritium).
  • a hydrogen atom that is, a light hydrogen atom, a deuterium atom, or Assume that tritium atoms are bonded.
  • the number of carbon atoms forming a ring refers to the number of carbon atoms constituting the ring itself of a compound having a structure in which atoms are bonded in a cyclic manner (for example, a monocyclic compound, a condensed ring compound, a bridged compound, a carbocyclic compound, and a heterocyclic compound). represents the number of carbon atoms among the atoms.
  • a monocyclic compound, a condensed ring compound, a bridged compound, a carbocyclic compound, and a heterocyclic compound represents the number of carbon atoms among the atoms.
  • the carbon contained in the substituent is not included in the number of carbon atoms forming the ring.
  • the "number of ring carbon atoms" described below is the same unless otherwise specified.
  • a benzene ring has 6 carbon atoms
  • a naphthalene ring has 10 carbon atoms
  • a pyridine ring has 5 carbon atoms
  • a furan ring has 4 carbon atoms.
  • the number of ring carbon atoms in the 9,9-diphenylfluorenyl group is 13
  • the number of ring carbon atoms in the 9,9'-spirobifluorenyl group is 25.
  • the benzene ring is substituted with an alkyl group as a substituent, for example, the number of carbon atoms of the alkyl group is not included in the number of carbon atoms forming the benzene ring.
  • the number of ring carbon atoms in the benzene ring substituted with an alkyl group is 6. Further, when the naphthalene ring is substituted with an alkyl group as a substituent, for example, the number of carbon atoms of the alkyl group is not included in the number of carbon atoms forming the naphthalene ring. Therefore, the number of ring carbon atoms in the naphthalene ring substituted with an alkyl group is 10.
  • the number of ring-forming atoms refers to compounds with a structure in which atoms are bonded in a cyclic manner (e.g., monocyclic, fused ring, and ring assembly) (e.g., monocyclic compound, fused ring compound, bridged compound, carbocyclic compound). Represents the number of atoms that constitute the ring itself (compounds and heterocyclic compounds). Atoms that do not form a ring (for example, a hydrogen atom that terminates a bond between atoms that form a ring) and atoms that are included in a substituent when the ring is substituted with a substituent are not included in the number of ring-forming atoms.
  • the "number of ring-forming atoms" described below is the same unless otherwise specified.
  • the number of ring atoms in the pyridine ring is 6, the number of ring atoms in the quinazoline ring is 10, and the number of ring atoms in the furan ring is 5.
  • the number of hydrogen atoms bonded to the pyridine ring or atoms constituting substituents is not included in the number of atoms forming the pyridine ring. Therefore, the number of ring atoms of the pyridine ring to which hydrogen atoms or substituents are bonded is six.
  • carbon number XX to YY in the expression “substituted or unsubstituted ZZ group with carbon number XX to YY” represents the number of carbon atoms when the ZZ group is unsubstituted, and is substituted. Do not include the number of carbon atoms in substituents.
  • "YY" is larger than “XX”, “XX” means an integer of 1 or more, and “YY” means an integer of 2 or more.
  • number of atoms XX to YY in the expression “substituted or unsubstituted ZZ group with number of atoms XX to YY” represents the number of atoms when the ZZ group is unsubstituted, and is substituted. Do not include the number of atoms of substituents in case.
  • "YY" is larger than “XX”, “XX” means an integer of 1 or more, and "YY" means an integer of 2 or more.
  • 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 "substituted or unsubstituted ZZ group". represents the case where is a "substituted ZZ group".
  • "unsubstituted” in the case of "substituted or unsubstituted ZZ group” means that the hydrogen atom in the ZZ group is not replaced with a substituent.
  • the hydrogen atom in the "unsubstituted ZZ group” is a light hydrogen atom, a deuterium atom, or a tritium atom.
  • substituted in the case of “substituted or unsubstituted ZZ group” means that one or more hydrogen atoms in the ZZ group are replaced with a substituent.
  • substitution in the case of "BB group substituted with an AA group” similarly means that one or more hydrogen atoms in the BB group are replaced with an AA group.
  • the number of ring carbon atoms in the "unsubstituted aryl group” described herein is 6 to 50, preferably 6 to 30, more preferably 6 to 18, unless otherwise specified herein. .
  • the number of ring atoms of the "unsubstituted heterocyclic group” described herein is 5 to 50, preferably 5 to 30, more preferably 5 to 18, unless otherwise specified herein. be.
  • the number of carbon atoms in the "unsubstituted alkyl group” described herein is 1 to 50, preferably 1 to 20, more preferably 1 to 6, unless otherwise specified herein.
  • the number of carbon atoms in the "unsubstituted alkenyl group” described herein is 2 to 50, preferably 2 to 20, more preferably 2 to 6, unless otherwise specified herein.
  • the number of carbon atoms in the "unsubstituted alkynyl group” described herein is 2 to 50, preferably 2 to 20, more preferably 2 to 6, unless otherwise specified herein.
  • the number of ring carbon atoms in the "unsubstituted cycloalkyl group” described herein is 3 to 50, preferably 3 to 20, more preferably 3 to 6. be.
  • the number of ring carbon atoms in the "unsubstituted arylene group” described herein is 6 to 50, preferably 6 to 30, more preferably 6 to 18. .
  • the number of ring atoms of the "unsubstituted divalent heterocyclic group” described herein is 5 to 50, preferably 5 to 30, more preferably 5 unless otherwise specified herein. ⁇ 18.
  • the number of carbon atoms in the "unsubstituted alkylene group” described herein is 1 to 50, preferably 1 to 20, more preferably 1 to 6, unless otherwise specified herein.
  • Specific examples (specific example group G1) of the "substituted or unsubstituted aryl group” described in this specification include the following unsubstituted aryl groups (specific example group G1A) and substituted aryl groups (specific example group G1B). ) etc.
  • the unsubstituted aryl group refers to the case where the "substituted or unsubstituted aryl group” is an "unsubstituted aryl group"
  • the substituted aryl group refers to the case where the "substituted or unsubstituted aryl group” is (Refers to the case where it is a "substituted aryl group.)
  • aryl group includes both "unsubstituted aryl group” and “substituted aryl group.”
  • “Substituted aryl group” means a group in which one or more hydrogen atoms of "unsubstituted aryl group” are replaced with a substituent.
  • Examples of the "substituted aryl group” include a group in which one or more hydrogen atoms of the "unsubstituted aryl group” in the specific example group G1A below are replaced with a substituent, and a substituted aryl group in the following specific example group G1B. Examples include: The examples of “unsubstituted aryl group” and “substituted aryl group” listed here are just examples, and the "substituted aryl group” described in this specification includes the following specific examples.
  • aryl group (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, benzocrysenyl group,
  • aryl group (specific example group G1B): o-tolyl group, m-tolyl group, p-tolyl group, para-xylyl group, meta-xylyl group, ortho-xylyl group, para-isopropylphenyl group, meta-isopropylphenyl group, ortho-isopropylphenyl group, para-t-butylphenyl group, meta-t-butylphenyl group, ortho-t-butylphenyl group, 3,4,5-trimethylphenyl group, 9,9-dimethylfluorenyl group, 9,9-diphenylfluorenyl group 9,9-bis(4-methylphenyl)fluorenyl group, 9,9-bis(4-isopropylphenyl)fluorenyl group, 9,9-bis(4-t-butylphenyl)fluorenyl group, cyanophenyl group, triphenylsily
  • heterocyclic group is a cyclic group containing at least one heteroatom as a ring-forming atom. Specific examples of heteroatoms include nitrogen atom, oxygen atom, sulfur atom, silicon atom, phosphorus atom, and boron atom.
  • a “heterocyclic group” as described herein is a monocyclic group or a fused ring group.
  • a “heterocyclic group” as described herein is an aromatic heterocyclic group or a non-aromatic heterocyclic group.
  • substituted or unsubstituted heterocyclic group examples include the following unsubstituted heterocyclic group (specific example group G2A) and substituted heterocyclic group ( Examples include specific example group G2B).
  • unsubstituted heterocyclic group refers to the case where "substituted or unsubstituted heterocyclic group” is “unsubstituted heterocyclic group”
  • substituted heterocyclic group refers to "substituted or unsubstituted heterocyclic group”
  • Heterocyclic group refers to a "substituted heterocyclic group."
  • heterocyclic group refers to "unsubstituted heterocyclic group” and “substituted heterocyclic group.” including both.
  • “Substituted heterocyclic group” means a group in which one or more hydrogen atoms of "unsubstituted heterocyclic group” are replaced with a substituent.
  • Specific examples of the "substituted heterocyclic group” include a group in which the hydrogen atom of the "unsubstituted heterocyclic group” in specific example group G2A is replaced, and examples of substituted heterocyclic groups in specific example group G2B below. Can be mentioned.
  • 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), and unsubstituted heterocyclic groups containing a sulfur atom.
  • heterocyclic group (specific example group G2A3), and a monovalent heterocyclic group derived by removing one hydrogen atom from the ring structure represented by the following general formulas (TEMP-16) to (TEMP-33) (Specific example group G2A4).
  • 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), and substituted heterocyclic groups containing a sulfur atom.
  • group Specific Example Group G2B3
  • one or more hydrogen atoms of a monovalent heterocyclic group derived from a ring structure represented by the following general formulas (TEMP-16) to (TEMP-33) are substituents.
  • Includes substituted groups (Example Group G2B4).
  • ⁇ Unsubstituted heterocyclic group containing a nitrogen atom (specific example group G2A1): pyrrolyl group, imidazolyl group, pyrazolyl group, triazolyl group, Tetrazolyl group, oxazolyl group, isoxazolyl group, oxadiazolyl group, thiazolyl group, isothiazolyl group, thiadiazolyl group, pyridyl group, pyridazinyl group, pyrimidinyl group, pyrazinyl group, triazinyl group, indolyl group, isoindolyl group, indolizinyl group, quinolidinyl group, quinolyl group, isoquinolyl group, cinnolyl group, phthalazinyl group, quinazolinyl group, quinoxalinyl group, benzimidazolyl group, indazolyl group, phenanthrolinyl
  • ⁇ Unsubstituted heterocyclic group containing an oxygen atom (specific example group G2A2): frill group, oxazolyl group, isoxazolyl group, oxadiazolyl group, xanthenyl group, benzofuranyl group, isobenzofuranyl group, dibenzofuranyl group, naphthobenzofuranyl group, benzoxazolyl group, benzisoxazolyl group, phenoxazinyl group, morpholino group, dinaphthofuranyl group, azadibenzofuranyl group, diazadibenzofuranyl group, Azanaphthobenzofuranyl group, and diazanaphthobenzofuranyl group.
  • X A and Y A are each independently an oxygen atom, a sulfur atom, NH, or CH 2 . However, at least one of X A and Y A is an oxygen atom, a sulfur atom, or NH.
  • the monovalent heterocyclic group derived from the represented ring structure includes a monovalent group obtained by removing one hydrogen atom from these NH or CH 2 .
  • Substituted heterocyclic group containing a nitrogen atom (specific example group G2B1): (9-phenyl)carbazolyl group, (9-biphenylyl)carbazolyl group, (9-phenyl)phenylcarbazolyl group, (9-naphthyl)carbazolyl group, diphenylcarbazol-9-yl group, phenylcarbazol-9-yl group, methylbenzimidazolyl group, ethylbenzimidazolyl group, phenyltriazinyl group, biphenylyltriazinyl group, diphenyltriazinyl group, phenylquinazolinyl group, and biphenylylquinazolinyl group.
  • ⁇ Substituted heterocyclic group containing an oxygen atom (specific example group G2B2): phenyldibenzofuranyl group, methyldibenzofuranyl group, A t-butyldibenzofuranyl group and a monovalent residue of spiro[9H-xanthene-9,9'-[9H]fluorene].
  • ⁇ Substituted heterocyclic group containing a sulfur atom (specific example group G2B3): phenyldibenzothiophenyl group, methyldibenzothiophenyl group, A t-butyldibenzothiophenyl group and a monovalent residue of spiro[9H-thioxanthene-9,9'-[9H]fluorene].
  • one or more hydrogen atoms of a monovalent heterocyclic group refers to a hydrogen atom bonded to a ring-forming carbon atom of the monovalent heterocyclic group, and at least one of XA and YA is NH. It means one or more hydrogen atoms selected from the hydrogen atom bonded to the nitrogen atom in the case where XA and YA are CH2, and the hydrogen atom of the methylene group when one of XA and YA is CH2.
  • Specific examples (specific example group G3) of the "substituted or unsubstituted alkyl group" described in this specification include the following unsubstituted alkyl groups (specific example group G3A) and substituted alkyl groups (specific example group G3B). ).
  • an unsubstituted alkyl group refers to a case where a "substituted or unsubstituted alkyl group” is an "unsubstituted alkyl group," and a substituted alkyl group refers to a case where a "substituted or unsubstituted alkyl group” is (This refers to the case where it is a "substituted alkyl group.”)
  • alkyl group when it is simply referred to as an "alkyl group,” it includes both an "unsubstituted alkyl group” and a "substituted alkyl group.”
  • “Substituted alkyl group” means a group in which one or more hydrogen atoms in "unsubstituted alkyl group” are replaced with a substituent.
  • substituted alkyl group examples include groups in which one or more hydrogen atoms in the "unsubstituted alkyl group” (specific example group G3A) below are replaced with a substituent, and substituted alkyl groups (specific examples examples include group G3B).
  • the alkyl group in "unsubstituted alkyl group” means a chain alkyl group. Therefore, the "unsubstituted alkyl group” includes a linear "unsubstituted alkyl group” and a branched "unsubstituted alkyl group”.
  • ⁇ Unsubstituted alkyl group (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.
  • ⁇ Substituted alkyl group (specific example group G3B): heptafluoropropyl group (including isomers), pentafluoroethyl group, 2,2,2-trifluoroethyl group and trifluoromethyl group.
  • “Substituted or unsubstituted alkenyl group” Specific examples of the "substituted or unsubstituted alkenyl group" (specific example group G4) described in this specification include the following unsubstituted alkenyl groups (specific example group G4A) and substituted alkenyl groups (specific example group G4B), etc.
  • the term "unsubstituted alkenyl group” refers to the case where "substituted or unsubstituted alkenyl group” is “unsubstituted alkenyl group”
  • “substituted alkenyl group” refers to "substituted or unsubstituted alkenyl group”).
  • alkenyl group includes both “unsubstituted alkenyl group” and “substituted alkenyl group.”
  • Substituted alkenyl group means a group in which one or more hydrogen atoms in "unsubstituted alkenyl group” are replaced with a substituent.
  • Specific examples of the "substituted alkenyl group” include the following "unsubstituted alkenyl group” (specific example group G4A) having a substituent, and the substituted alkenyl group (specific example group G4B). It will be done.
  • ⁇ Unsubstituted alkenyl group (specific example group G4A): vinyl group, allyl group, 1-butenyl group, 2-butenyl group and 3-butenyl group.
  • ⁇ Substituted alkenyl group (specific example group G4B): 1,3-butandienyl group, 1-methylvinyl group, 1-methylallyl group, 1,1-dimethylallyl group, 2-methylallyl group and 1,2-dimethylallyl group.
  • unsubstituted alkynyl group refers to the case where "substituted or unsubstituted alkynyl group” is “unsubstituted alkynyl group."
  • "unsubstituted alkynyl group” is referred to as "unsubstituted alkynyl group.”
  • ⁇ alkynyl group'' and ⁇ substituted alkynyl group.'' "Substituted alkynyl group” means a group in which one or more hydrogen atoms in "unsubstituted alkynyl group” are replaced with a substituent.
  • 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 a substituent.
  • Specific examples (specific example group G6) of the "substituted or unsubstituted cycloalkyl group” described in this specification include the following unsubstituted cycloalkyl groups (specific example group G6A) and substituted cycloalkyl groups ( Examples include specific example group G6B).
  • unsubstituted cycloalkyl group refers to the case where "substituted or unsubstituted cycloalkyl group” is “unsubstituted cycloalkyl group”, and the term “substituted cycloalkyl group” refers to "substituted or unsubstituted cycloalkyl group”).
  • cycloalkyl group refers to the case where "substituted cycloalkyl group” is used.
  • cycloalkyl group when simply referring to “cycloalkyl group”, it refers to "unsubstituted cycloalkyl group” and “substituted cycloalkyl group”. including both.
  • Substituted cycloalkyl group means a group in which one or more hydrogen atoms in "unsubstituted cycloalkyl group” are replaced with a substituent.
  • Specific examples of the "substituted cycloalkyl group” include the following "unsubstituted cycloalkyl group” (specific example group G6A) in which one or more hydrogen atoms are replaced with a substituent, and a substituted cycloalkyl group. (Specific example group G6B) and the like can be mentioned.
  • cycloalkyl group (specific example group G6A): cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, 1-adamantyl group, 2-adamantyl group, 1-norbornyl group and 2-norbornyl group.
  • cycloalkyl group (specific example group G6B): 4-methylcyclohexyl group.
  • G7 Specific examples of the group represented by -Si(R 901 )(R 902 )(R 903 ) described in this specification (specific example group G7) include: -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) can be mentioned.
  • G1 is a "substituted or unsubstituted aryl group" described in specific example group G1.
  • G2 is a "substituted or unsubstituted heterocyclic group” described in specific example group G2.
  • G3 is a "substituted or unsubstituted alkyl group” described in specific example group G3.
  • G6 is a "substituted or unsubstituted cycloalkyl group” described in specific example group G6.
  • a plurality of G2's in Si(G2) (G2) (G2) are mutually the same or different.
  • a plurality of G3's in Si(G3) (G3) are mutually the same or different.
  • - A plurality of G6's in Si(G6) (G6) (G6) are mutually the same or different.
  • G8 Specific examples of the group represented by -O-(R 904 ) described in this specification (specific example group G8) include: -O(G1), -O(G2), -O (G3) and -O (G6) can be mentioned.
  • G1 is a "substituted or unsubstituted aryl group” described in specific example group G1.
  • G2 is a "substituted or unsubstituted heterocyclic group” described in specific example group G2.
  • G3 is a "substituted or unsubstituted alkyl group” described in specific example group G3.
  • G6 is a "substituted or unsubstituted cycloalkyl group” described in specific example group G6.
  • G9 Group represented by -S-(R 905 )
  • Specific examples of the group represented by -S-(R 905 ) described in this specification include: -S (G1), -S (G2), -S (G3) and -S (G6) can be mentioned.
  • G1 is a "substituted or unsubstituted aryl group” described in specific example group G1.
  • G2 is a "substituted or unsubstituted heterocyclic group” described in specific example group G2.
  • G3 is a "substituted or unsubstituted alkyl group” described in specific example group G3.
  • G6 is a "substituted or unsubstituted cycloalkyl group” described in specific example group G6.
  • G10 Group represented by -N(R 906 )(R 907 )
  • Specific examples of the group represented by -N(R 906 )(R 907 ) described in this specification include: -N(G1)(G1), -N(G2)(G2), -N (G1) (G2), -N (G3) (G3), and -N (G6) (G6) can be mentioned.
  • G1 is a "substituted or unsubstituted aryl group” described in specific example group G1.
  • G2 is a "substituted or unsubstituted heterocyclic group” described in specific example group G2.
  • G3 is a "substituted or unsubstituted alkyl group” described in specific example group G3.
  • G6 is a "substituted or unsubstituted cycloalkyl group” described in specific example group G6.
  • -N(G1) A plurality of G1's in (G1) are mutually the same or different.
  • -N(G2) A plurality of G2's in (G2) are the same or different.
  • -N(G3) A plurality of G3's in (G3) are mutually the same or different.
  • -N(G6) A plurality of G6's in (G6) are mutually the same or different.
  • halogen atom specifically examples include a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, and the like.
  • substituted or unsubstituted fluoroalkyl group refers to a "substituted or unsubstituted alkyl group" in which at least one hydrogen atom bonded to a carbon atom constituting the alkyl group is replaced with a fluorine atom. It also includes a group in which all hydrogen atoms bonded to the carbon atoms constituting the alkyl group in a "substituted or unsubstituted alkyl group” are replaced with fluorine atoms (perfluoro group).
  • the number of carbon atoms in the "unsubstituted fluoroalkyl group” is from 1 to 50, preferably from 1 to 30, and more preferably from 1 to 18, unless otherwise specified herein.
  • “Substituted fluoroalkyl group” means a group in which one or more hydrogen atoms of the "fluoroalkyl group” are replaced with a substituent.
  • substituted fluoroalkyl group described in this specification includes a group in which one or more hydrogen atoms bonded to the carbon atom of the alkyl chain in the "substituted fluoroalkyl group” is further replaced with a substituent, and Also included are groups in which one or more hydrogen atoms of a substituent in a "substituted fluoroalkyl group” are further replaced with a substituent.
  • substituents of a substituent in a "substituted fluoroalkyl group” are further replaced with a substituent.
  • the "unsubstituted fluoroalkyl group” include a group in which one or more hydrogen atoms in the "alkyl group” (specific example group G3) are replaced with a fluorine atom.
  • ⁇ “Substituted or unsubstituted haloalkyl group” means that at least one hydrogen atom bonded to a carbon atom constituting the alkyl group in the "substituted or unsubstituted alkyl group” is replaced with a halogen atom. It means a group, and also includes a group in which all hydrogen atoms bonded to carbon atoms constituting an alkyl group in a "substituted or unsubstituted alkyl group” are replaced with halogen atoms.
  • the number of carbon atoms in the "unsubstituted haloalkyl group” is from 1 to 50, preferably from 1 to 30, and more preferably from 1 to 18.
  • “Substituted haloalkyl group” means a group in which one or more hydrogen atoms of the "haloalkyl group” are replaced with a substituent.
  • the "substituted haloalkyl group" described in this specification includes a group in which one or more hydrogen atoms bonded to the carbon atom of the alkyl chain in the "substituted haloalkyl group” is further replaced with a substituent; Also included are groups in which one or more hydrogen atoms of a substituent in the "haloalkyl group” are further replaced with a substituent.
  • Specific examples of the "unsubstituted haloalkyl group” include a group in which one or more hydrogen atoms in the "alkyl group” (specific example group G3) are replaced with a halogen atom.
  • a haloalkyl group is sometimes referred to as a halogenated alkyl group.
  • a specific example of the "substituted or unsubstituted alkoxy group" described in this specification is a group represented by -O(G3), where G3 is a "substituted or unsubstituted alkoxy group” described in specific example group G3.
  • the number of carbon atoms in the "unsubstituted alkoxy group” is from 1 to 50, preferably from 1 to 30, and more preferably from 1 to 18, unless otherwise specified herein.
  • ⁇ “Substituted or unsubstituted alkylthio group” A specific example of the "substituted or unsubstituted alkylthio group” described in this specification is a group represented by -S(G3), where G3 is the "substituted or unsubstituted alkylthio group” described in specific example group G3. "unsubstituted alkyl group”. Unless otherwise specified herein, the number of carbon atoms in the "unsubstituted alkylthio group” is from 1 to 50, preferably from 1 to 30, and more preferably from 1 to 18.
  • 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 aryloxy group” described in specific example group G1. or an unsubstituted aryl group.
  • the number of ring carbon atoms in the "unsubstituted aryloxy group" is from 6 to 50, preferably from 6 to 30, and more preferably from 6 to 18, unless otherwise specified herein.
  • a specific example of the "substituted or unsubstituted arylthio group” described in this specification is a group represented by -S(G1), where G1 is the "substituted or unsubstituted arylthio group” described in the specific example group G1.
  • G1 is the "substituted or unsubstituted arylthio group” described in the specific example group G1.
  • the number of ring carbon atoms in the "unsubstituted arylthio group” is from 6 to 50, preferably from 6 to 30, and more preferably from 6 to 18, unless otherwise specified herein.
  • ⁇ “Substituted or unsubstituted trialkylsilyl group” A specific example of the "trialkylsilyl group” described in this specification is a group represented by -Si(G3)(G3)(G3), where G3 is a group described in specific example group G3. It is a "substituted or unsubstituted alkyl group.” - A plurality of G3's in Si(G3) (G3) (G3) are mutually the same or different. The number of carbon atoms in each alkyl group of the "trialkylsilyl group” is from 1 to 50, preferably from 1 to 20, and more preferably from 1 to 6, unless otherwise specified herein.
  • a specific example of the "substituted or unsubstituted aralkyl group” described in this specification is a group represented by -(G3)-(G1), where G3 is a group described in specific example group G3. It is a "substituted or unsubstituted alkyl group", and G1 is a "substituted or unsubstituted aryl group” described in the specific example group G1.
  • an "aralkyl group” is a group in which the 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 determined unless otherwise specified herein. , 7 to 50, preferably 7 to 30, more preferably 7 to 18.
  • substituted or unsubstituted aralkyl groups include benzyl group, 1-phenylethyl group, 2-phenylethyl group, 1-phenylisopropyl group, 2-phenylisopropyl group, phenyl-t-butyl group, ⁇ - Naphthylmethyl group, 1- ⁇ -naphthylethyl group, 2- ⁇ -naphthylethyl group, 1- ⁇ -naphthylisopropyl group, 2- ⁇ -naphthylisopropyl group, ⁇ -naphthylmethyl group, 1- ⁇ -naphthylethyl group , 2- ⁇ -naphthylethyl group, 1- ⁇ -naphthylisopropyl group, and 2- ⁇ -naphthylisopropyl group.
  • the substituted or unsubstituted aryl group described herein is preferably a phenyl group, p-biphenyl group, m-biphenyl group, o-biphenyl group, p-terphenyl group, unless otherwise specified herein.
  • 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, or a phenol group, unless otherwise specified herein.
  • Nanthrolinyl group carbazolyl group (1-carbazolyl group, 2-carbazolyl group, 3-carbazolyl group, 4-carbazolyl group, or 9-carbazolyl group), benzocarbazolyl group, azacarbazolyl group, diazacarbazolyl group , dibenzofuranyl group, naphthobenzofuranyl group, azadibenzofuranyl group, diazadibenzofuranyl group, dibenzothiophenyl group, naphthobenzothiophenyl group, azadibenzothiophenyl group, diazadibenzothiophenyl group, ( 9-phenyl)carbazolyl group ((9-phenyl)carbazol-1-yl group, (9-phenyl)carbazol-2-yl group, (9-phenyl)carbazol-3-yl group, or (9-phenyl)carbazole -4-yl group), (9-b
  • carbazolyl group is specifically any of the following groups unless otherwise specified in the specification.
  • the (9-phenyl)carbazolyl group is specifically any of the following groups, unless otherwise stated in the specification.
  • dibenzofuranyl group and dibenzothiophenyl group are specifically any of the following groups unless otherwise specified in the specification.
  • the substituted or unsubstituted alkyl group described herein is preferably a methyl group, ethyl group, propyl group, isopropyl group, n-butyl group, isobutyl group, and t- Butyl group, etc.
  • the "substituted or unsubstituted arylene group” described in this specification refers to 2 derived from the above “substituted or unsubstituted aryl group” by removing one hydrogen atom on the aryl ring. It is the basis of valence.
  • the "substituted or unsubstituted arylene group” (specific example group G12), by removing one hydrogen atom on the aryl ring from the "substituted or unsubstituted aryl group” described in specific example group G1
  • Examples include divalent groups derived from the derivatives.
  • the "substituted or unsubstituted divalent heterocyclic group” described herein refers to the "substituted or unsubstituted heterocyclic group" described above, in which one hydrogen atom on the heterocycle is removed. It is a divalent group derived from Specific examples of the "substituted or unsubstituted divalent heterocyclic group" (specific example group G13) include one hydrogen on the heterocycle from the "substituted or unsubstituted heterocyclic group” described in specific example group G2. Examples include divalent groups derived by removing atoms.
  • the "substituted or unsubstituted alkylene group” described in this specification refers to 2 derived from the above "substituted or unsubstituted alkyl group” by removing one hydrogen atom on the alkyl chain. It is the basis of valence.
  • a "substituted or unsubstituted alkylene group” (specific example group G14), one hydrogen atom on the alkyl chain is removed from the "substituted or unsubstituted alkyl group” described in specific example group G3. Examples include divalent groups derived from the derivatives.
  • the substituted or unsubstituted arylene group described herein is preferably a group represented by any of the following general formulas (TEMP-42) to (TEMP-68).
  • Q 1 to Q 10 are each independently a hydrogen atom or a substituent.
  • * represents the bonding position.
  • Q 1 to Q 10 are each independently a hydrogen atom or a substituent.
  • Formulas Q 9 and Q 10 may be bonded to each other via a single bond to form a ring.
  • * represents the bonding position.
  • Q 1 to Q 8 are each independently a hydrogen atom or a substituent.
  • * represents the bonding position.
  • the substituted or unsubstituted divalent heterocyclic group described herein is preferably one of the following general formulas (TEMP-69) to (TEMP-102), unless otherwise specified herein. It is.
  • Q 1 to Q 9 are each independently a hydrogen atom or a substituent.
  • Q 1 to Q 8 are each independently a hydrogen atom or a substituent.
  • the set of two or more adjacent R 930 is one set. is a set of R 921 and R 922 , a set of R 922 and R 923 , a set of R 923 and R 924 , a set of R 924 and R 930 , a set of R 930 and R 925 , a set of R 925 and A set of R 926 , a set of R 926 and R 927 , a set of R 927 and R 928 , a set of R 928 and R 929 , and a set of R 929 and R 921 .
  • the above-mentioned "one or more sets” means that two or more sets of the above-mentioned two or more adjacent sets may form a ring at the same time.
  • R 921 and R 922 combine with each other to form ring Q A
  • R 925 and R 926 combine with each other to form ring Q B
  • the above general formula (TEMP-103) The anthracene compound represented is represented by the following general formula (TEMP-104).
  • a set of two or more adjacent items forms a ring is not only the case where a set of "two" adjacent items are combined as in the example above, but also the case where a set of "three or more adjacent items” form a ring. This also includes the case where two sets are combined.
  • R 921 and R 922 combine with each other to form a ring Q A
  • R 922 and R 923 combine with each other to form a ring Q C
  • the three adjacent to each other (R 921 , R 922 and R 923 ) combine with each other to form a ring and are condensed to the anthracene mother skeleton.
  • anthracene compound represented by the general formula (TEMP-103) is as follows: It is represented by the general formula (TEMP-105). In the following general formula (TEMP-105), ring Q A and ring Q C share R 922 .
  • the "single ring” or “fused ring” that is formed may be a saturated ring or an unsaturated ring as the structure of only the formed ring. Even if “one set of two adjacent rings” forms a “monocycle” or “fused ring,” the “monocycle” or “fused ring” is a saturated ring, or Can form unsaturated rings.
  • ring Q A and ring Q B formed in the general formula (TEMP-104) are each a “monocyclic ring” or a “fused ring.”
  • the ring Q A and the ring Q C formed in the general formula (TEMP-105) are "fused rings”.
  • Ring Q A and ring Q C in the general formula (TEMP-105) are a condensed ring due to the condensation of ring Q A and ring Q C.
  • ring Q A in the general formula (TEMP-104) is a benzene ring
  • ring Q A is a monocyclic ring.
  • ring Q A in the general formula (TEMP-104) is a naphthalene ring
  • ring Q A is a fused ring.
  • Unsaturated ring means an aromatic hydrocarbon ring or an aromatic heterocycle.
  • “Saturated ring” means an aliphatic hydrocarbon ring or a non-aromatic heterocycle.
  • Specific examples of the aromatic hydrocarbon ring include structures in which the groups listed as specific examples in specific example group G1 are terminated with hydrogen atoms.
  • Specific examples of the aromatic heterocycle include structures in which the aromatic heterocyclic group listed as a specific example in specific example group G2 is terminated with a hydrogen atom.
  • Specific examples of the aliphatic hydrocarbon ring include structures in which the groups listed as specific examples in specific example group G6 are terminated with hydrogen atoms.
  • Form a ring means to form a ring with only a plurality of atoms of a parent skeleton, or with a plurality of atoms of a parent skeleton and one or more arbitrary elements.
  • the ring Q A shown in the general formula (TEMP-104) formed by R 921 and R 922 bonding to each other is a carbon atom of the anthracene skeleton to which R 921 is bonded, and an anthracene bond to which R 922 is bonded. It means a ring formed by a carbon atom in the skeleton and one or more arbitrary elements.
  • R 921 and R 922 form a ring Q A
  • the carbon atom of the anthracene skeleton to which R 921 is bonded the carbon atom of the anthracene skeleton to which R 922 is bonded, and four carbon atoms.
  • R 921 and R 922 form a monocyclic unsaturated ring
  • the ring formed by R 921 and R 922 is a benzene ring.
  • the "arbitrary element” is preferably at least one element selected from the group consisting of carbon element, nitrogen element, oxygen element, and sulfur element, unless otherwise specified in this specification.
  • a bond that does not form a ring may be terminated with a hydrogen atom or the like, or may be substituted with an "arbitrary substituent” described below.
  • the ring formed is a heterocycle.
  • the number of "one or more arbitrary elements" constituting a monocyclic or condensed ring is preferably 2 to 15, more preferably 3 to 12. , more preferably 3 or more and 5 or less.
  • a “monocycle” is preferred among “monocycle” and “fused ring.” Unless otherwise specified herein, the "unsaturated ring” is preferred between the “saturated ring” and the “unsaturated ring”. Unless otherwise stated herein, a “monocycle” is preferably a benzene ring. Unless otherwise stated herein, an “unsaturated ring” is preferably a benzene ring.
  • one or more pairs of two or more adjacent groups are “bonded with each other to form a substituted or unsubstituted monocycle” or “bonded with each other to form a substituted or unsubstituted fused ring”
  • one or more of the pairs of two or more adjacent atoms are bonded to each other to form a bond with a plurality of atoms of the parent skeleton and one or more of the 15 or more atoms.
  • a substituted or unsubstituted "unsaturated ring” is formed with at least one element selected from the group consisting of the following carbon elements, nitrogen elements, oxygen elements, and sulfur elements.
  • the substituent is, for example, the "arbitrary substituent” described below.
  • Specific examples of the substituent in the case where the above-mentioned “single ring” or “fused ring” has a substituent are the substituents described in the section of "Substituent described herein” above.
  • the substituent is, for example, the "arbitrary substituent” described below.
  • substituents in the case where the above-mentioned "single ring” or “fused ring” has a substituent are the substituents described in the section of "Substituent described herein" above. The above applies to cases in which "one or more sets of two or more adjacent groups combine with each other to form a substituted or unsubstituted monocycle" and "one or more sets of two or more adjacent groups” are combined with each other to form a substituted or unsubstituted condensed ring ("the case where they are combined to form a ring").
  • the substituent in the case of "substituted or unsubstituted” is, for example, an unsubstituted alkyl group having 1 to 50 carbon atoms, unsubstituted alkenyl group having 2 to 50 carbon atoms, 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 atom, cyano group, nitro group, A group selected from the group consisting of an unsubstituted aryl group having 6 to 50 ring
  • R 901s When two or more R 901s exist, the two or more R 901s are the same or different, When two or more R 902s exist, the two or more R 902s are the same or different, When two or more R 903s exist, the two or more R 903s are the same or different, When two or more R 904s exist, the two or more R 904s are the same or different, When two or more R 905s exist, the two or more R 905s are the same or different, When two or more R 906s exist, the two or more R 906s are the same or different, When two or more R 907s exist, the two or more R 907s are the same or different.
  • the substituent in the case of "substituted or unsubstituted” is an alkyl group having 1 to 50 carbon atoms, A group selected from the group consisting of an aryl group having 6 to 50 ring carbon atoms and a heterocyclic group having 5 to 50 ring atoms.
  • the substituent in the case of "substituted or unsubstituted” is an alkyl group having 1 to 18 carbon atoms, A group selected from the group consisting of an aryl group having 6 to 18 ring carbon atoms and a heterocyclic group having 5 to 18 ring atoms.
  • any adjacent substituents may form a "saturated ring" or "unsaturated ring", preferably a substituted or unsubstituted saturated ring. Forms a 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 do.
  • any substituent may further have a substituent.
  • the substituents that the arbitrary substituents further have are the same as the above arbitrary substituents.
  • the numerical range expressed using "AA-BB” has the numerical value AA written before “AA-BB” as the lower limit, and the numerical value BB written after "AA-BB”. means a range that includes as an upper limit value.
  • the organic EL device of the present invention has an anode, a cathode, and an organic layer disposed between the anode and the cathode, the organic layer has a light emitting layer, and at least two of the organic layers each have a It independently has a compound represented by formula (1).
  • the organic layer containing the compound represented by formula (1) hereinafter sometimes simply referred to as "compound (1)" will be described later.
  • symbols in equation (1) and each equation included in equation (1) described later will be explained. Unless otherwise specified, identical symbols have the same meaning.
  • Compound (1) is represented by the following formula (1).
  • X is an oxygen atom or a sulfur atom.
  • R 1 to R 6 and R 8 to R 11 are each independently, hydrogen atom, halogen atom, nitro group, cyano group, Substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, 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 heteroaryl group having 5 to 50 ring atoms; A group represented by -Si(R 901 )(R 902 )(R 903 ), A group represented by -O-(R 904 ), A group represented by -S-(R 905 ) or a group represented by -N
  • R 1 to R 6 and R 8 to R 11 are each independently preferably a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted ring-forming alkyl group having 3 to 50 carbon atoms.
  • a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, more preferably a hydrogen atom or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.
  • 50 aryl group particularly preferably a hydrogen atom.
  • halogen atoms represented by R 1 to R 6 and R 8 to R 11 are as described above in the section of "Substituent described herein," and are preferably fluorine atoms.
  • the details of the substituted or unsubstituted alkyl group having 1 to 50 carbon atoms represented by R 1 to R 6 and R 8 to R 11 are as described above in the section of "Substituent described herein.”
  • the unsubstituted alkyl group is preferably a methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, s-butyl group, or t-butyl group, more preferably a methyl group.
  • ethyl group, isopropyl group, or t-butyl group more preferably methyl group or t-butyl group.
  • the unsubstituted cycloalkyl group is preferably a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a 1-adamantyl group, a 2-adamantyl group, a 1-norbornyl group, or a 2-norbornyl group, and more preferably A cyclopropyl group, a cyclobutyl group, a cyclopentyl group, or a cyclohexyl group, more preferably a cyclopentyl group or a cyclohexyl group.
  • the details of the substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms represented by R 1 to R 6 and R 8 to R 11 are as described above in the section of "Substituent described herein.”
  • the unsubstituted aryl group is preferably a phenyl group, biphenyl group, naphthyl group, terphenyl group, phenanthrenyl group, triphenylenyl group, or fluorenyl group, more preferably a phenyl group, biphenyl group, or naphthyl group, More preferred is a phenyl group.
  • the unsubstituted heteroaryl group is preferably a dibenzofuranyl group, dibenzothiophenyl group, naphthobenzofuranyl group, naphthobenzothiophenyl group, carbazolyl group (9-carbazolyl group and 1-, 2-, 3- or 4-carbazolyl group) or pyridyl group, more preferably dibenzofuranyl group or dibenzothiophenyl group.
  • R 901 to R 903 are each independently a hydrogen atom, a substituted or an 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 aryl group having 6 to 50 ring carbon atoms.
  • a substituted heteroaryl group (heterocyclic group) having 5 to 50 ring atoms, preferably a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring atoms. It is. Details of these groups are as described above.
  • R 904 is each independently a hydrogen atom, a substituted or unsubstituted group having 1 to 50 carbon atoms; Alkyl group, substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or substituted or unsubstituted aryl group having 5 to 50 ring carbon atoms.
  • heteroaryl group preferably a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms. Details of these groups are as described above.
  • R 905 is each independently a hydrogen atom, a substituted or unsubstituted group having 1 to 50 carbon atoms; Alkyl group, substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or substituted or unsubstituted aryl group having 5 to 50 ring carbon atoms.
  • a heteroaryl group is preferably a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms. Details of these groups are as described above.
  • R 906 and R 907 are each independently a hydrogen atom, a substituted or unsubstituted Alkyl group having 1 to 50 carbon atoms, substituted or unsubstituted cycloalkyl group having 3 to 50 ring forming carbon atoms, substituted or unsubstituted aryl group having 6 to 50 ring forming carbon atoms, or substituted or unsubstituted ring forming group
  • R 1 to R 6 and R 8 to R 11 preferably R 2 , R 4 or R 10 represents a single bond bonded to *.
  • Two adjacent ones selected from R 1 to R 6 that are not single bonds bonded to * (at least one selected from R 1 and R 2 , R 2 and R 3 , R 4 and R 5 , and R 5 and R 6 ) two adjacent ones selected from R 8 to R 11 that are not single bonds bonded to * (selected from R 8 and R 9 , R 9 and R 10 , and R 10 and R 11 At least one adjacent two) may be bonded to each other to form a substituted or unsubstituted ring structure, or may not be bonded to each other and therefore do not need to form a ring structure.
  • the ring structure is selected from a substituted or unsubstituted aromatic hydrocarbon ring, a substituted or unsubstituted aliphatic hydrocarbon ring, a substituted or unsubstituted aromatic heterocycle, and a substituted or unsubstituted non-aromatic heterocycle.
  • a substituted or unsubstituted aromatic hydrocarbon ring is preferred.
  • the aromatic hydrocarbon ring is preferably a benzene ring, a biphenylene ring, a naphthalene ring, or a fluorene ring, more preferably a benzene ring or a naphthalene ring, and still more preferably a benzene ring.
  • the aliphatic hydrocarbon ring is, for example, a cyclopentene ring, a cyclopentadiene ring, a cyclohexene ring, a cyclohexadiene ring, or a hydrocarbon ring obtained by partially hydrogenating the aromatic hydrocarbon ring.
  • the aromatic heterocycles include, for example, a pyrrole ring, a furan ring, a thiophene ring, a pyridine ring, an imidazole ring, a pyrazole ring, an indole ring, an isoindole ring, a benzofuran ring, an isobenzofuran ring, a benzothiophene ring, a benzimidazole ring, and an indazole ring.
  • the non-aromatic heterocycle is, for example, a heterocycle obtained by partially hydrogenating the aromatic heterocycle.
  • All of R 1 to R 6 and R 8 to R 11 that are not single bonds bonded to * may be hydrogen atoms.
  • L is a single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heteroarylene group having 5 to 50 ring atoms, or a carbonized aromatic group having 6 to 50 ring carbon atoms.
  • the unsubstituted arylene group is preferably a phenylene group, a naphthylene group, a biphenylene group, a fluorenylene group, or a phenanthrylene group, more preferably a phenylene group (o-, m-, or p-phenylene group), a naphthylene group (1, 4- or 2,6-naphthylene group), or biphenylene group (4,4'-, 4,3'-, or 4,2'-biphenylene group).
  • the aromatic hydrocarbon ring having 6 to 50 ring atoms is preferably a benzene ring, naphthalene ring, fluorene ring, or phenanthrene ring, and the aromatic heterocycle having 5 to 50 ring atoms is preferably a furan ring. , a thiophene ring, a pyridine ring, a dibenzofuran ring, a dibenzothiophene ring, and a carbazole ring.
  • the unsubstituted divalent group is preferably a divalent group in which two or more rings selected from the aromatic hydrocarbon rings are bonded via a single bond, and two or more rings selected from the benzene ring and naphthalene ring. It is more preferable that the ring is a divalent group bonded via a single bond.
  • A is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heteroaryl group having 5 to 50 ring carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms; It is a substituted amino group having two substituents selected from a group and a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms.
  • A is preferably selected from the following formulas (1a) to (1f).
  • *a is the bonding position to L.
  • X 1 is an oxygen atom, a sulfur atom, NRa, CRbRc, or SiRdRe.
  • Ra is a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring atoms, or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms; , preferably a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, more preferably a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms It is the basis.
  • the details are as described for R 1 to R 6 and R 8 to R 11 of formula (1).
  • Rb and Rc 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-forming carbon atoms, or a substituted or unsubstituted ring-forming atom number
  • a heteroaryl group having 5 to 50 carbon atoms preferably a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.
  • Rb and Rc may be bonded to each other to form a substituted or unsubstituted spiro ring, or may not be bonded to each other and therefore do not need to form a spiro ring.
  • the spiro ring is a hydrocarbon ring or a heterocycle, and is selected from a monocyclic ring, a fused ring, a bridged bicyclo ring, and a bridged tricyclo ring. Examples of substituted or unsubstituted spiro rings are shown below, but the invention is not limited thereto. * indicates the bonding position of the fluorene skeleton to the benzene ring.
  • Rd and Re 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 forming atoms, or a substituted or unsubstituted ring forming number of atoms;
  • a heteroaryl group having 5 to 50 carbon atoms preferably a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.
  • the details are as described for R 1 to R 6 and R 8 to R 11 of formula (1).
  • Rd and Re may be bonded to each other to form a substituted or unsubstituted spiro ring, or may not be bonded to each other and therefore do not need to form a spiro ring. Details of the spiro ring are as described for Rb and Rc.
  • R 21 to R 28 are each independently as defined for R 1 to R 6 and R 8 to R 11 in formula (1). However, one selected from R 21 to R 28 , Ra, Rb, Rc, Rd, and Re is a single bond bonded to *b, and one selected from R 21 to R 28 is not a single bond bonded to *b. Two adjacent ones may be bonded to each other to form a substituted or unsubstituted ring structure, or may not be bonded to each other and therefore do not need to form a ring structure. Details of the ring structure are as described for R 1 to R 6 and R 8 to R 11 in formula (1). *All of R 21 to R 28 that are not single bonds bonded to b may be hydrogen atoms.
  • *a is the bonding position to L.
  • L 1 and L 2 are each independently a single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heteroarylene group having 5 to 50 ring atoms, or a ring A substituted or unsubstituted divalent group in which two or more rings selected from aromatic hydrocarbon rings having 6 to 50 carbon atoms and aromatic heterocycles having 5 to 50 ring atoms are bonded via a single bond. It is preferably a single bond or a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms.
  • Ar 1 and Ar 2 are each independently a substituted or unsubstituted aryl group having 6 to 50 ring atoms or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms. Details of the substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms and the substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms include R 1 to R 6 and R 8 of formula (1). ⁇ R As described for 11 .
  • Ar 1 and Ar 2 are each independently represented by one of the following formulas (1b-1) to (1b-4).
  • ** represents the bonding position to L 1 or L 2 .
  • One selected from R 131 to R 138 , R A , and R B is a single bond bonded to *c1.
  • Each of R 131 to R 138 that is not a single bond is independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms. It is.
  • Two adjacent ones selected from R 131 to R 138 that are not single bonds are either bonded to each other to form an unsubstituted benzene ring, or are not bonded to each other to form a ring.
  • R 131 to R 138 that are not single bonds may be hydrogen atoms.
  • R A and R B which are not single bonds are a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring forming carbon atoms, or a substituted or unsubstituted ring forming aryl group having 6 to 50 carbon atoms. It is a heteroaryl group having 5 to 50 atoms.
  • R A and R B which are not single bonds, either bond to each other to form a substituted or unsubstituted spiro ring, or do not bond to each other to form a ring.
  • ** represents the bonding position to L 1 or L 2 .
  • X 2 is an oxygen atom or a sulfur atom.
  • R 141 to R 148 is a single bond bonded to *c2.
  • Each of R 141 to R 148 that is not a single bond is independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms. It is. All of R 141 to R 148 that are not single bonds may be hydrogen atoms.
  • R 141 to R 148 Two adjacent ones selected from R 141 to R 148 that are not single bonds are either bonded to each other to form an unsubstituted benzene ring, or are not bonded to each other to form a ring.
  • Details of the substituted or unsubstituted alkyl group having 1 to 50 carbon atoms and the substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms are as described in formula (1).
  • R 151 to R 158 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms.
  • Two adjacent ones selected from R 151 to R 158 that are not single bonds are either bonded to each other to form an unsubstituted benzene ring, or are not bonded to each other to form a ring. All of R 151 to R 158 that are not single bonds may be hydrogen atoms. Details of the substituted or unsubstituted alkyl group having 1 to 50 carbon atoms and the substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms are as described in formula (1).
  • ** represents the bonding position to L 1 or L 2 .
  • Z is a hydrogen atom or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms. Two arbitrary substituents adjacent to each other on the aryl group represented by Z are bonded to each other to form a ring structure, or are not bonded to each other to form a ring. The details of the substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms and the ring structure are as described in formula (1).
  • R 31 to R 41 are each independently as defined for R 1 to R 6 and R 8 to R 11 in formula (1). All of R 31 to R 41 may be hydrogen atoms. However, two adjacent ones selected from R 31 to R 41 may be bonded to each other to form a substituted or unsubstituted ring structure, or may not be bonded to each other and therefore do not form a ring structure. Details of the ring structure are as described for formula (1).
  • R 51 to R 59 are each independently as defined for R 1 to R 6 and R 8 to R 11 in formula (1). All of R 51 to R 59 may be hydrogen atoms. However, two adjacent ones selected from R 51 to R 59 may be bonded to each other to form a substituted or unsubstituted ring structure, or may not be bonded to each other and therefore do not form a ring structure. Details of the ring structure are as described for formula (1).
  • R 61 to R 69 are each independently as defined for R 1 to R 6 and R 8 to R 11 in formula (1). All of R 61 to R 69 may be hydrogen atoms. Adjacent two selected from R 61 to R 69 do not bond to each other and therefore do not form a ring structure.
  • Y 1 is a nitrogen atom or CR 71
  • Y 3 is a nitrogen atom or CR 73
  • Y 5 is a nitrogen atom or CR 75 .
  • R 71 to R 75 are each independently as defined for R 1 to R 6 and R 8 to R 11 in formula (1).
  • R 71 and R 72 may be bonded to each other to form a substituted or unsubstituted ring structure, or may not be bonded to each other and therefore do not form a ring structure
  • Y 3 is CR 73
  • two adjacent ones selected from R 72 to R 74 may be bonded to each other to form a substituted or unsubstituted ring structure, or may not be bonded to each other and therefore form a ring structure.
  • R 74 and R 75 may be bonded to each other to form a substituted or unsubstituted ring structure, or may not be bonded to each other and therefore do not form a ring structure. Details of the ring structure are as described for formula (1).
  • compound (1) includes compounds represented by the following formulas (1-1) to (1-6).
  • hydrogen atom as used herein includes light hydrogen atoms, deuterium atoms, and tritium atoms. Accordingly, the compounds of the invention may contain naturally occurring deuterium atoms. Further, a deuterium atom may be intentionally introduced into compound (1) by using a deuterated compound as part or all of the raw material compound. Therefore, in one embodiment of the present invention, compound (1) contains at least one deuterium atom. That is, compound (1) may be a compound represented by formula (1), in which at least one of the hydrogen atoms contained in the compound is a deuterium atom.
  • At least one hydrogen atom selected from the following hydrogen atoms may be a deuterium atom.
  • “substituted or unsubstituted” the number of carbon atoms, and the number of atoms are omitted for the sake of simplicity.
  • the deuteration rate of compound (1) depends on the deuteration rate of the raw material compound used. Even if a raw material with a predetermined deuteration rate is used, a certain proportion of naturally derived light hydrogen isotopes may be included. Therefore, the aspect of the deuteration rate of compound (1) shown below is based on the ratio calculated by simply counting the number of deuterium atoms represented by the chemical formula, taking into account trace amounts of naturally occurring isotopes. Contains ratios.
  • the deuteration rate of compound (1) is preferably 1% or more, more preferably 3% or more, even more preferably 5% or more, even more preferably 10% or more, even more preferably 50% or more.
  • Compound (1) may be a mixture containing a deuterated compound and a non-deuterated compound, or a mixture of two or more compounds having different deuteration rates.
  • the deuteration rate of such a mixture is preferably 1% or more, more preferably 3% or more, even more preferably 5% or more, even more preferably 10% or more, even more preferably 50% or more, and 100% or more. less than %.
  • the ratio of the number of deuterium atoms to the total number of hydrogen atoms in compound (1) is preferably 1% or more, more preferably 3% or more, even more preferably 5% or more, even more preferably 10% or more, and , 100% or less.
  • compound (1) is preferably a light hydrogen compound from the viewpoint of manufacturing cost.
  • the light hydrogen compound refers to a compound in which all hydrogen atoms in compound (1) are light hydrogen atoms. Therefore, the present invention includes an organic EL device in which at least two of the organic layers contain compound (1) consisting essentially only of a light hydrogen compound.
  • “Compound (1) consisting essentially only of light hydrogen bodies” means that the content ratio of light hydrogen bodies to the total amount of compound (1) is 90 mol% or more, preferably 95 mol% or more, more preferably 99 mol%. % or more (each including 100%).
  • substituted XX group included in the definitions of the above formulas is a substituted XX group
  • the details of the substituent are as described in "Substituents in the case of "substituted or unsubstituted””. and is preferably an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 12 ring atoms, or an aromatic heterocyclic group having 5 to 13 ring atoms, more preferably 1 to 6 carbon atoms. is an alkyl group or an aryl group having 6 to 12 ring carbon atoms. Details of each group are as described above.
  • Compound (1) can be easily produced by those skilled in the art with reference to known synthesis methods.
  • the organic EL element of the present invention includes an anode, a cathode, and an organic layer disposed between the anode and the cathode.
  • the organic layer includes a light-emitting layer, and at least two of the organic layers include compound (1).
  • Examples of organic layers containing compound (1) include hole transport zones (hole injection layer, hole transport layer, electron blocking layer, exciton blocking layer, etc.) provided between the anode and the light emitting layer; At least two layers selected from a light emitting layer and an electron transport zone (electron injection layer, electron transport layer, hole blocking layer, etc.) provided between the cathode and the light emitting layer are mentioned.
  • the compounds (1) contained in the at least two layers may be the same or different.
  • Hole transport zone and other organic layers, (2) the emissive layer and other organic layers, or (3) the electron transport zone and other organic layers contain compound (1). More preferably (4) a hole transport zone and a light emitting layer; (5) light-emitting layer and electron transport zone; (6) The hole transport zone and the electron transport zone, or (7) the hole transport zone, the light emitting layer, and the electron transport zone contain the compound (1).
  • hole transport layer and light emitting layer (9) a light emitting layer and an electron transport layer; (10) The hole transport layer and the electron transport layer, or (11) the hole transport layer, the light emitting layer, and the electron transport layer contain the compound (1).
  • the hole transport layer may consist of two or more layers, and one of the two or more hole transport layers, preferably the hole transport layer closest to the cathode (closest to the light emitting layer), is a compound (1). May include.
  • the hole transport layer contains the compound (1) and consists of a first hole transport layer on the anode side and a second hole transport layer on the cathode side
  • the second hole transport layer contains the compound (1). It is preferable to include (1).
  • the light-emitting layer may consist of two or more layers, and one of the two or more light-emitting layers, preferably the light-emitting layer closest to the anode (closest to the hole transport layer), may contain compound (1). .
  • the first light-emitting layer contains the compound (1).
  • the electron transport layer may consist of two or more layers, and any one of the two or more electron transport layers, preferably the electron transport layer closest to the anode (closest to the light emitting layer), may contain the compound (1). good.
  • the electron transport layer contains the compound (1) and the electron transport layer consists of a first electron transport layer on the anode side and a second electron transport layer on the cathode side
  • the first electron transport layer contains the compound (1). It is preferable.
  • the hole transport layer, the light emitting layer, and the electron transport layer each have a two-layer structure, (12) a first hole transport layer and a first light emitting layer; (13) a first light emitting layer and a first electron transport layer; (14)
  • the first hole transport layer and the first electron transport layer, or (15) the first hole transport layer, the first light emitting layer, and the first electron transport layer preferably contain the compound (1).
  • the compound (1) contained in the hole transport zone is preferably represented by formula (1-1) or (1-2).
  • the compound (1) contained in the light-emitting layer can be represented by formula (1-3), (1-4), or (1-5). preferable.
  • the compound (1) contained in the electron transport band is preferably represented by formula (1-5) or (1-6).
  • the organic EL device of the present invention may be a monochromatic fluorescent or phosphorescent type light emitting device, a fluorescent/phosphorescent hybrid type white light emitting device, or a simple type having a single light emitting unit.
  • the device may be of a tandem type having a plurality of light emitting units, and is preferably a fluorescent light emitting device.
  • the "light-emitting unit” refers to a minimum unit that includes an organic layer, at least one of which is a light-emitting layer, and emits light by recombining injected holes and electrons.
  • the light-emitting unit may be a multilayer type having a plurality of phosphorescence-emitting layers or fluorescent light-emitting layers.
  • a space layer may be provided for the purpose of preventing excitons from diffusing into the fluorescent light emitting layer.
  • a typical layer structure of a simple light emitting unit is shown below. The layers in parentheses are optional.
  • Each of the phosphorescent or fluorescent light-emitting layers may emit light of a different color from each other.
  • the light emitting unit (f) hole injection layer/) hole transport layer/first phosphorescent layer (red light emitting layer)/second phosphorescent light emitting layer (green light emitting layer)/space layer/fluorescent light emitting layer.
  • Examples include a layer structure such as a layer (blue light emitting)/electron transport layer.
  • an electron blocking layer may be provided between each light emitting layer and the hole transport layer or space layer, as appropriate.
  • a hole blocking layer may be provided between each light emitting layer and the electron transport layer as appropriate.
  • Typical device configurations of tandem type organic EL devices include the following device configurations.
  • the first light emitting unit and the second light emitting unit can be independently selected from the above light emitting units, for example.
  • the intermediate layer is generally also called an intermediate electrode, intermediate conductive layer, charge generation layer, electron extraction layer, connection layer, or intermediate insulating layer, and supplies electrons to the first light emitting unit and holes to the second light emitting unit. Any known material configuration can be used.
  • FIG. 1 is a schematic diagram showing an example of the configuration of an organic EL element of the present invention.
  • the organic EL element 1 includes a substrate 2, an anode 3, a cathode 4, and a light emitting unit 10 disposed between the anode 3 and the cathode 4.
  • the light emitting unit 10 has a light emitting layer 5.
  • a hole transport zone 6 (hole injection layer, hole transport layer, etc.) is formed between the light emitting layer 5 and the anode 3
  • an electron transport zone 7 electron injection layer, electron transport layer, etc.
  • an electron blocking layer (not shown) may be provided on the anode 3 side of the light emitting layer 5, and a hole blocking layer (not shown) may be provided on the cathode 4 side of the light emitting layer 5.
  • FIG. 2 is a schematic diagram showing another configuration of the organic EL element of the present invention.
  • the organic EL element 11 includes a substrate 2, an anode 3, a cathode 4, and a light emitting unit 20 disposed between the anode 3 and the cathode 4.
  • the light emitting unit 20 has a light emitting layer 5.
  • the hole transport zone disposed between the anode 3 and the light emitting layer 5 is formed of a hole injection layer 6a, a first hole transport layer 6b, and a second hole transport layer 6c.
  • the electron transport zone arranged between the light emitting layer 5 and the cathode 4 is formed from the first electron transport layer 7a and the second electron transport layer 7b.
  • FIG. 3 is a schematic diagram showing another configuration of the organic EL element of the present invention.
  • the organic EL element 12 includes a substrate 2, an anode 3, a cathode 4, and a light emitting unit 30 disposed between the anode 3 and the cathode 4.
  • the light emitting unit 30 has a first light emitting layer 5a and a second light emitting layer 5b.
  • the hole transport zone disposed between the anode 3 and the first light emitting layer 5a is formed of a hole injection layer 6a, a first hole transport layer 6b, and a second hole transport layer 6c.
  • the electron transport zone arranged between the second light emitting layer 5b and the cathode 4 is formed from the first electron transport layer 7a and the second electron transport layer 7b.
  • a host combined with a fluorescent dopant material is referred to as a fluorescent host
  • a host combined with a phosphorescent dopant material is referred to as a phosphorescent host.
  • Fluorescent hosts and phosphorescent hosts are not distinguished only by molecular structure. That is, the phosphorescent host refers to a material containing a phosphorescent dopant that forms a phosphorescent layer, and does not mean that it cannot be used as a material to form a fluorescent layer. The same applies to fluorescent hosts.
  • the substrate is used as a support for the organic EL element.
  • a plate of glass, quartz, plastic, etc. can be used.
  • a flexible substrate may be used.
  • the flexible substrate include plastic substrates made of polycarbonate, polyarylate, polyethersulfone, polypropylene, polyester, polyvinyl fluoride, and polyvinyl chloride.
  • an inorganic vapor-deposited film can also be used.
  • Anode It is preferable to use a metal, an alloy, an electrically conductive compound, a mixture thereof, or the like having a large work function (specifically, 4.0 eV or more) for the anode formed on the substrate.
  • a metal, an alloy, an electrically conductive compound, a mixture thereof, or the like having a large work function (specifically, 4.0 eV or more) for the anode formed on the substrate.
  • ITO indium oxide-tin oxide
  • indium oxide-tin oxide containing silicon or silicon oxide indium oxide-zinc oxide
  • indium oxide containing tungsten oxide and zinc oxide examples include graphene.
  • gold Au
  • platinum Pt
  • nickel Ni
  • tungsten W
  • Cr chromium
  • Mo molybdenum
  • iron Fe
  • Co cobalt
  • Cu copper
  • palladium Pd
  • titanium Ti
  • nitrides of the above metals eg, titanium nitride
  • These materials are usually deposited using a sputtering method.
  • a sputtering method For example, for indium oxide-zinc oxide, use a target in which 1 to 10 wt% of zinc oxide is added to indium oxide, and for indium oxide containing tungsten oxide and zinc oxide, 0.5 to 5 wt% of tungsten oxide is added to indium oxide. %, and by using a target containing 0.1 to 1 wt % zinc oxide, it can be formed by a sputtering method. In addition, it may be produced by a vacuum evaporation method, a coating method, an inkjet method, a spin coating method, or the like.
  • the organic layer may include a hole transport zone between the anode and the light emitting layer.
  • the hole transport zone is composed of a hole injection layer, a hole transport layer, an electron blocking layer, and the like.
  • the hole injection layer formed in contact with the anode is formed using a material that can easily inject holes regardless of the work function of the anode. , alloys, electrically conductive compounds, mixtures thereof, and elements belonging to Group 1 or Group 2 of the Periodic Table of Elements). Elements belonging to Group 1 or Group 2 of the periodic table of elements, which are materials with a small work function, such as alkali metals such as lithium (Li) and cesium (Cs), as well as magnesium (Mg), calcium (Ca), and strontium.
  • Alkaline earth metals such as (Sr), alloys containing these (for example, MgAg, AlLi), rare earth metals such as europium (Eu), ytterbium (Yb), alloys containing these, etc. can also be used.
  • a vacuum evaporation method or a sputtering method can be used.
  • silver paste or the like a coating method, an inkjet method, etc. can be used.
  • Hole injection layer is a layer containing a material with high hole injection property (hole injection material), and is located between the anode and the light emitting layer or, if present, with the hole transport layer. Formed between the anodes.
  • Hole injection layer materials include molybdenum oxide, titanium oxide, vanadium oxide, rhenium oxide, ruthenium oxide, chromium oxide, zirconium oxide, hafnium oxide, tantalum oxide, silver oxide, and tungsten oxide.
  • Manganese oxide, manganese oxide, etc. can be used.
  • High molecular compounds oligomers, dendrimers, polymers, etc.
  • PVK poly(N-vinylcarbazole)
  • PVTPA poly(4-vinyltriphenylamine)
  • PTPDMA poly[N-(4- ⁇ N'-[4-(4-diphenylamino) phenyl]phenyl-N'-phenylamino ⁇ phenyl) methacrylamide]
  • PTPDMA poly[N,N'-bis(4-butylphenyl)-N,N'-bis(phenyl)benzidine]
  • Polymer compounds such as Poly-TPD
  • a polymer compound to which an acid is added such as poly(3,4-ethylenedioxythiophene)/poly(styrene sulfonic acid) (PEDOT/PSS) or polyaniline/poly(styrene sulfonic acid) (PAni/PSS), is used. You can also do that.
  • acceptor material such as a hexaazatriphenylene (HAT) compound represented by the following formula (K).
  • HAT hexaazatriphenylene
  • R 221 to R 226 are each independently a cyano group, -CONH 2 , a carboxyl group, or -COOR 227 (R 227 is an alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 3 to 20 carbon atoms)
  • R 227 is an alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 3 to 20 carbon atoms
  • two adjacent groups selected from R 221 and R 222 , R 223 and R 224 , and R 225 and R 226 bond to each other to form a group represented by -CO-O-CO-.
  • R 227 examples include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, t-butyl group, cyclopentyl group, and cyclohexyl group.
  • the hole transport layer is a layer containing a material with high hole transport properties (hole transport material), and is located between the anode and the light emitting layer or, if present, between the hole injection layer and the hole transport layer. It is formed between the light emitting layers.
  • hole transport material a material with high hole transport properties
  • the hole transport layer may have a single layer structure or a multilayer structure including two or more layers.
  • the hole transport layer may have a two-layer structure including a first hole transport layer (on the anode side) and a second hole transport layer (on the cathode side). That is, the hole transport zone may include a first hole transport layer on the anode side and a second hole transport layer on the cathode side.
  • the hole transport layer may have a three-layer structure including, in order from the anode side, a first hole transport layer, a second hole transport layer, and a third hole transport layer. That is, the third hole transport layer may be arranged between the second hole transport layer and the light emitting layer.
  • the single-layer structure hole transport layer is preferably adjacent to the light emitting layer, and the hole transport layer closest to the cathode in the multilayer structure is, for example, the two-layer structure
  • the second hole transport layer and the third hole transport layer of the three-layer structure are preferably adjacent to the light emitting layer.
  • the below-mentioned electron A blocking layer or the like may be interposed.
  • aromatic amine compounds examples include 4,4'-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (abbreviation: NPB) and N,N'-bis(3-methylphenyl)-N , N'-diphenyl-[1,1'-biphenyl]-4,4'-diamine (abbreviation: TPD), 4-phenyl-4'-(9-phenylfluoren-9-yl)triphenylamine (abbreviation: BAFLP), 4,4'-bis[N-(9,9-dimethylfluoren-2-yl)-N-phenylamino]biphenyl (abbreviation: DFLDPBi), 4,4',4''-tris(N,N -diphenylamino)tri
  • carbazole derivatives examples include 4,4'-di(9-carbazolyl)biphenyl (abbreviation: CBP), 9-[4-(9-carbazolyl)phenyl]-10-phenylanthracene (abbreviation: CzPA), and Examples include 9-phenyl-3-[4-(10-phenyl-9-anthryl)phenyl]-9H-carbazole (abbreviation: PCzPA).
  • anthracene derivatives examples include 2-t-butyl-9,10-di(2-naphthyl)anthracene (abbreviation: t-BuDNA), 9,10-di(2-naphthyl)anthracene (abbreviation: DNA), and , 9,10-diphenylanthracene (abbreviation: DPAnth).
  • Polymer compounds such as poly(N-vinylcarbazole) (abbreviation: PVK) and poly(4-vinyltriphenylamine) (abbreviation: PVTPA) can also be used.
  • PVK poly(N-vinylcarbazole)
  • PVTPA poly(4-vinyltriphenylamine)
  • compounds other than those mentioned above may be used as long as they have higher hole transport properties than electron transport properties.
  • the first hole transport layer contains one or more compounds represented by the following formula (11) or formula (12). is preferred.
  • one or both of the first hole transport layer and the second hole transport layer is 1 represented by the following formula (11) or (12). Preferably, it contains one or more compounds.
  • the organic EL device of the present invention having a hole transport layer with an n-layer structure n is an integer of 4 or more
  • at least one of the first hole transport layer to the (n-1)th hole transport layer has the following formula: It is preferable to contain one or more compounds represented by (11) or formula (12).
  • L A1 , L B1 , L C1 , L A2 , L B2 , L C2 and L D2 are each independently a single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted arylene group is a divalent heterocyclic group having 5 to 50 ring atoms, k is 1, 2, 3 or 4, When k is 1, L E2 is a substituted or unsubstituted arylene group having 6 to 50 ring atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms; When k is 2, 3 or 4, 2, 3 or 4 L E2 are the same or different, When k is 2, 3 or 4, the plurality of L E2 's are bonded to each other to form a substituted or unsubstituted monocycle, bonded to each other to form a substituted or
  • a 1 , B 1 , C 1 , A 2 , B 2 , C 2 and D 2 are each independently a substituted or unsubstituted aryl group having 6 to 50 ring-forming carbon atoms, or a substituted or unsubstituted ring-forming aryl group
  • R' 901 , R' 902 and R' 903 are each independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms
  • A1, B1, C1, A2, B2, C2, and D2 are preferably each independently a substituted or unsubstituted phenylene group, a substituted or unsubstituted biphenyl group, Substituted or unsubstituted terphenyl group, substituted or unsubstituted naphthyl group, substituted or unsubstituted fluorenyl group, substituted or unsubstituted dibensofuranyl group, substituted or unsubstituted dibenzothiophenyl group, and substituted or unsubstituted dibenzothiophenyl group. selected from carbazolyl groups.
  • At least one of A1, B1, and C1, and in formula (12), at least one of A2, B2, C2, and D2 is substituted or unsubstituted biphenyl. group, substituted or unsubstituted terphenyl group, substituted or unsubstituted naphthyl group, substituted or unsubstituted fluorenyl group, substituted or unsubstituted dibensofuranyl group, or substituted or unsubstituted dibenzothiophenyl group, substituted or unsubstituted It is a substituted carbazolyl group.
  • the fluorenyl groups that A1, B1, C1, A2, B2, C2, and D2 can have may have a substituent at the 9-position, for example, 9,9-dimethylfluorenyl group, 9,9- It may also be a diphenylfluorenyl group. Further, the substituents at the 9-position may form a ring, for example, the substituents at the 9-position may form a fluorene skeleton or a xanthene skeleton.
  • L A1 , L B1 , L C1 , L A2 , L B2 , L C2 and L D2 are preferably each independently a single bond or a substituted or unsubstituted arylene group having 6 to 12 ring carbon atoms.
  • the light emitting layer is a layer containing a highly luminescent material (dopant material), and various materials can be used.
  • a fluorescent material or a phosphorescent material can be used as a dopant material.
  • Fluorescent materials are compounds that emit light from a singlet excited state
  • phosphorescent materials are compounds that emit light from a triplet excited state.
  • the emissive layer is a single layer.
  • the light emitting layer includes a first light emitting layer on the anode side and a second light emitting layer on the cathode side.
  • Pyrene derivatives, styrylamine derivatives, chrysene derivatives, fluoranthene derivatives, fluorene derivatives, diamine derivatives, triarylamine derivatives, etc. can be used as blue fluorescent materials that can be used in the light-emitting layer.
  • N,N'-bis[4-(9H-carbazol-9-yl)phenyl]-N,N'-diphenylstilbene-4,4'-diamine (abbreviation: YGA2S), 4-(9H -carbazol-9-yl)-4'-(10-phenyl-9-anthryl)triphenylamine (abbreviation: YGAPA), 4-(10-phenyl-9-anthryl)-4'-(9-phenyl-9H -carbazol-3-yl)triphenylamine (abbreviation: PCBAPA).
  • Aromatic amine derivatives and the like can be used as green fluorescent materials that can be used in the light emitting layer.
  • 2PCAPA N-(9,10-diphenyl-2-anthryl)-N,9-diphenyl-9H-carbazol-3-amine
  • 2PCABPhA N-[9,10-bis(1,1 '-biphenyl-2-yl)-2-anthryl]-N,9-diphenyl-9H-carbazol-3-amine
  • 2DPAPA N-(9,10-diphenyl-2-anthryl)-N,N ',N'-triphenyl-1,4-phenylenediamine
  • 2DPAPA N-[9,10-bis(1,1'-biphenyl-2-yl)-2-anthryl]-N,N' , N'-triphenyl-1,4-phenylenediamine
  • 2DPABPhA N-[9,10-bis(1,1'-biphenyl-2
  • Tetracene derivatives, diamine derivatives, etc. can be used as red fluorescent materials that can be used in the light emitting layer.
  • N,N,N',N'-tetrakis(4-methylphenyl)tetracene-5,11-diamine abbreviation: p-mPhTD
  • 7,14-diphenyl-N,N,N' examples include N'-tetrakis(4-methylphenyl)acenaphtho[1,2-a]fluoranthene-3,10-diamine (abbreviation: p-mPhAFD).
  • the light-emitting layer contains a fluorescent material (fluorescent dopant material).
  • Metal complexes such as iridium complexes, osmium complexes, and platinum complexes are used as blue-based phosphorescent materials that can be used in the light-emitting layer.
  • An iridium complex or the like is used as a green phosphorescent material that can be used in the light emitting layer.
  • Tris(2-phenylpyridinato-N,C2')iridium(III) (abbreviation: Ir(ppy)3), bis(2-phenylpyridinato-N,C2')iridium(III) acetylacetonate ( Abbreviation: Ir(ppy)2(acac)), bis(1,2-diphenyl-1H-benzimidazolato)iridium(III) acetylacetonate (abbreviation: Ir(pbi)2(acac)), bis(benzo[ h] quinolinato) iridium (III) acetylacetonate (abbreviation: Ir(bzz)2(acac)), and the like.
  • Metal complexes such as iridium complexes, platinum complexes, terbium complexes, and europium complexes are used as red-colored phosphorescent materials that can be used in the light-emitting layer.
  • bis[2-(2′-benzo[4,5- ⁇ ]thienyl)pyridinato-N,C3′]iridium(III) acetylacetonate abbreviation: Ir(btp)2(acac)
  • Bis(1-phenylisoquinolinato-N,C2')iridium(III) acetylacetonate abbreviation: Ir(piq)2(acac)
  • (acetylacetonato)bis[2,3-bis(4-fluoro) phenyl)quinoxalinato]iridium(III) abbreviation: Ir(Fdpq)2(acac)
  • tris(acetylacetonato)(monophenanthroline)terbium(III) (abbreviation: Tb(acac)3(Phen)
  • tris(1,3-diphenyl-1,3-propanedionato)(monophenanthroline) europium (III) (abbreviation: Eu(DBM)3(Phen)
  • tris[1-(2-thenoyl)-3,3,3-trifluoroacetonato](monophenanthroline) europium(III) (abbreviation: Eu( Rare earth metal complexes such as TTA)3(Phen) can be used as phosphorescent materials because they emit light from rare earth metal ions (electronic transition between different multiplicities).
  • the light emitting layer may have a structure in which the above-mentioned dopant material is dispersed in another material (host material). It is preferable to use a material that has a higher lowest unoccupied orbital level (LUMO level) and a lower highest occupied orbital level (HOMO level) than the dopant material.
  • LUMO level lowest unoccupied orbital level
  • HOMO level lowest occupied orbital level
  • Examples of host materials other than compound (1) include (1) metal complexes such as aluminum complexes, beryllium complexes, or zinc complexes; (2) Heterocyclic compounds such as oxadiazole derivatives, benzimidazole derivatives, or phenanthroline derivatives, (3) fused aromatic compounds such as carbazole derivatives, anthracene derivatives, phenanthrene derivatives, pyrene derivatives, or chrysene derivatives, (4) Aromatic amine compounds such as triarylamine derivatives or fused polycyclic aromatic amine derivatives are used.
  • metal complexes such as aluminum complexes, beryllium complexes, or zinc complexes
  • Heterocyclic compounds such as oxadiazole derivatives, benzimidazole derivatives, or phenanthroline derivatives
  • fused aromatic compounds such as carbazole derivatives, anthracene derivatives, phenanthrene derivatives, pyrene derivatives, or chrysene derivatives
  • tris(8-quinolinolato)aluminum(III) (abbreviation: Alq)
  • tris(4-methyl-8-quinolinolato)aluminum(III) (abbreviation: Almq3)
  • bis(10-hydroxybenzo[h]quinolinato)beryllium (II) (abbreviation: BeBq2)
  • bis(2-methyl-8-quinolinolato)(4-phenylphenolato)aluminum(III) abbreviation: BAlq
  • bis(8-quinolinolato)zinc(II) (abbreviation: Znq)
  • bis[2-(2-benzoxazolyl)phenolato]zinc(II) (abbreviation: ZnPBO), bis[2-(2-benzothiazolyl)phenolato]zinc(II) (abbreviation: ZnBTZ), etc.
  • anthracene compound in the case of a blue fluorescent element, it is preferable to use the following anthracene compound as a host material.
  • the organic EL element when the light-emitting layer includes a first light-emitting layer and a second light-emitting layer, at least one of the components constituting the first light-emitting layer contains the second light-emitting layer. It is different from the constituent components.
  • the dopant material contained in the first light emitting layer may be different from the dopant material contained in the second light emitting layer, or the host material contained in the first light emitting layer may be different from the host material contained in the second light emitting layer. Different aspects are mentioned.
  • the light-emitting layer may contain a light-emitting compound (hereinafter sometimes simply referred to as a "fluorescent compound”) that exhibits fluorescent light emission with a main peak wavelength of 500 nm or less.
  • a light-emitting compound hereinafter sometimes simply referred to as a "fluorescent compound” that exhibits fluorescent light emission with a main peak wavelength of 500 nm or less.
  • the method for measuring the main peak wavelength is as follows. A 5 ⁇ mol/L toluene solution of the compound to be measured is prepared and placed in a quartz cell, and the emission spectrum (vertical axis: emission intensity, horizontal axis: wavelength) of this sample is measured at room temperature (300K).
  • the emission spectrum can be measured using a spectrofluorometer (device name: F-7000) manufactured by Hitachi High-Tech Science Co., Ltd. Note that the emission spectrum measuring device is not limited to the device used here.
  • the peak wavelength of the emission spectrum at which the emission intensity is maximum is defined as the main peak wavelength.
  • the main peak wavelength may be referred to as fluorescence main peak wavelength (FL-peak).
  • the fluorescent compound may be the dopant material or the host material.
  • the light-emitting layer is a single layer, only one of the dopant material and the host material may be the fluorescent compound, or both may be the fluorescent compound.
  • the light emitting layer includes a first light emitting layer (anode side) and a second light emitting layer (cathode side)
  • only one of the first light emitting layer and the second light emitting layer contains the fluorescent compound.
  • both of the light-emitting layers may contain the fluorescent compound.
  • the first light-emitting layer contains the fluorescent compound
  • only one of the dopant material and the host material contained in the first light-emitting layer may be the fluorescent compound, or both may be the fluorescent compound.
  • the second light emitting layer contains the fluorescent compound
  • only one of the dopant material and the host material contained in the second light emitting layer may be the fluorescent compound, or both may be the fluorescent compound. It may be a sexual compound.
  • Electron transport layer is a layer containing a material with high electron transport properties (electron transport material), and is formed between the light emitting layer and the cathode or, if present, between the light emitting layer and the electron injection layer. Ru.
  • the electron transport layer may have a single layer structure or a multilayer structure including two or more layers.
  • the electron transport layer may have a two-layer structure including a first electron transport layer (on the anode side) and a second electron transport layer (on the cathode side).
  • the electron transport layer of the single layer structure is preferably adjacent to the light emitting layer, and the electron transport layer of the multilayer structure that is closest to the anode, for example, the electron transport layer of the two layer structure is adjacent to the light emitting layer.
  • the electron transport layer of the two layer structure is adjacent to the light emitting layer.
  • one electron transport layer is adjacent to the light emitting layer.
  • the hole blocking described below is provided between the electron transport layer and the light emitting layer of the single layer structure, or between the electron transport layer and the light emitting layer closest to the light emitting layer in the multilayer structure. A layer or the like may be interposed.
  • the electron transport layer contains, for example, (1) Metal complexes such as aluminum complexes, beryllium complexes, zinc complexes, (2) Heteroaromatic compounds such as imidazole derivatives, benzimidazole derivatives, azine derivatives, carbazole derivatives, phenanthroline derivatives, (3) High molecular compounds can be used.
  • Metal complexes such as aluminum complexes, beryllium complexes, zinc complexes
  • Heteroaromatic compounds such as imidazole derivatives, benzimidazole derivatives, azine derivatives, carbazole derivatives, phenanthroline derivatives
  • High molecular compounds can be used.
  • metal complexes examples include tris(8-quinolinolato)aluminum(III) (abbreviation: Alq), tris(4-methyl-8-quinolinolato)aluminum (abbreviation: Almq3), bis(10-hydroxybenzo[h]quinolinato).
  • Beryllium (abbreviation: BeBq 2 ), bis(2-methyl-8-quinolinolato)(4-phenylphenolato)aluminum(III) (abbreviation: BAlq), bis(8-quinolinolato)zinc(II) (abbreviation: Znq) ), bis[2-(2-benzoxazolyl)phenolato]zinc(II) (abbreviation: ZnPBO), and bis[2-(2-benzothiazolyl)phenolato]zinc(II) (abbreviation: ZnBTZ).
  • BeBq 2 Beryllium (abbreviation: BeBq 2 ), bis(2-methyl-8-quinolinolato)(4-phenylphenolato)aluminum(III) (abbreviation: BAlq), bis(8-quinolinolato)zinc(II) (abbreviation: Znq) ), bis[2-(2-benzoxazolyl
  • heteroaromatic compound examples include 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: TAZ), 3-(4-tert-butylphenyl)-4-(4-ethylphenyl)-5-(4-biphenylyl)-1,2,4 - Triazole (abbreviation: p-EtTAZ), bathophenanthroline (abbreviation: BPhen), bathocuproine (abbreviation: BCP), and 4,4'-bis(5-methylbenzo
  • polymer compounds include poly[(9,9-dihexylfluorene-2,7-diyl)-co-(pyridine-3,5-diyl)] (abbreviation: PF-Py), poly[(9, 9-dioctylfluorene-2,7-diyl)-co-(2,2'-bipyridine-6,6'-diyl)] (abbreviation: PF-BPy).
  • the above material has an electron mobility of 10 ⁇ 6 cm 2 /Vs or more. Note that materials other than those mentioned above may be used for the electron transport layer as long as they have higher electron transport properties than hole transport properties.
  • the electron injection layer is a layer containing a material with high electron injection properties.
  • the electron injection layer contains alkali metals such as lithium (Li) and cesium (Cs), alkaline earth metals such as magnesium (Mg), calcium (Ca), and strontium (Sr), europium (Eu), and ytterbium (Yb).
  • alkali metals such as lithium (Li) and cesium (Cs)
  • alkaline earth metals such as magnesium (Mg), calcium (Ca), and strontium (Sr), europium (Eu), and ytterbium (Yb).
  • Rare earth metals such as these and compounds containing these metals can be used. Examples of such compounds include alkali metal oxides, alkali metal halides, alkali metal-containing organic complexes, alkaline earth metal oxides, alkaline earth metal halides, alkaline earth metal-containing organic complexes, and rare earth metal oxides.
  • Examples include rare earth metal halides, and rare earth metal-containing organic complexes. Moreover, a plurality of these compounds can also be used as a mixture.
  • a material having an electron transport property containing an alkali metal, an alkaline earth metal, or a compound thereof, specifically a material containing magnesium (Mg) in Alq may be used. Note that in this case, electron injection from the cathode can be performed more efficiently.
  • a composite material made of a mixture of an organic compound and an electron donor may be used for the electron injection layer. Such a composite material has excellent electron injection and electron transport properties because the organic compound receives electrons from an electron donor.
  • the organic compound is preferably a material that is excellent in transporting received electrons, and specifically, for example, the above-mentioned materials constituting the electron transport layer (metal complexes, heteroaromatic compounds, etc.) are used. be able to.
  • the electron donor may be any material as long as it exhibits electron donating properties to organic compounds.
  • alkali metals, alkaline earth metals, and rare earth metals are preferred, and examples include lithium, cesium, magnesium, calcium, erbium, and ytterbium.
  • alkali metal oxides and alkaline earth metal oxides are preferable, and examples thereof include lithium oxide, calcium oxide, barium oxide, and the like.
  • Lewis bases such as magnesium oxide can also be used.
  • organic compounds such as tetrathiafulvalene (abbreviation: TTF) can also be used.
  • Cathode It is preferable to use a metal, an alloy, an electrically conductive compound, a mixture thereof, or the like having a small work function (specifically, 3.8 eV or less) for the cathode.
  • cathode materials include elements belonging to Group 1 or Group 2 of the periodic table of elements, that is, alkali metals such as lithium (Li) and cesium (Cs), and magnesium (Mg) and calcium (Ca). ), alkaline earth metals such as strontium (Sr), alloys containing these (for example, MgAg, AlLi), rare earth metals such as europium (Eu), ytterbium (Yb), and alloys containing these.
  • the cathode when forming a cathode using an alkali metal, an alkaline earth metal, or an alloy containing these, a vacuum evaporation method or a sputtering method can be used. Furthermore, when using silver paste or the like, a coating method, an inkjet method, etc. can be used. By providing an electron injection layer, the cathode can be formed using various conductive materials such as Al, Ag, ITO, graphene, silicon, or indium oxide-tin oxide containing silicon oxide, regardless of the size of the work function. can do. These conductive materials can be formed into films using a sputtering method, an inkjet method, a spin coating method, or the like.
  • an insulating layer made of an insulating thin film layer may be inserted between the pair of electrodes.
  • materials used for the insulating layer include aluminum oxide, lithium fluoride, lithium oxide, cesium fluoride, cesium oxide, magnesium oxide, magnesium fluoride, calcium oxide, calcium fluoride, aluminum nitride, titanium oxide, and silicon oxide. , germanium oxide, silicon nitride, boron nitride, molybdenum oxide, ruthenium oxide, vanadium oxide, and the like. Note that a mixture or a laminate of these may also be used.
  • the above-mentioned space layer is, for example, for the purpose of preventing excitons generated in the phosphorescent layer from diffusing into the fluorescent layer or adjusting carrier balance when a fluorescent layer and a phosphorescent layer are stacked.
  • This is a layer provided between a fluorescent layer and a phosphorescent layer.
  • a space layer can also be provided between a plurality of phosphorescence-emitting layers. Since the space layer is provided between the light-emitting layers, it is preferably made of a material that has both electron-transporting properties and hole-transporting properties. Further, in order to prevent triplet energy from diffusing in adjacent phosphorescent emitting layers, it is preferable that the triplet energy is 2.6 eV or more. Examples of the material used for the space layer include the same materials as those used for the hole transport layer described above.
  • a blocking layer such as an electron blocking layer, a hole blocking layer, an exciton blocking layer, etc. may be provided adjacent to the light emitting layer.
  • the electron blocking layer is a layer that prevents electrons from leaking from the light emitting layer to the hole transport layer
  • the hole blocking layer is a layer that prevents holes from leaking from the light emitting layer to the electron transport layer.
  • the exciton blocking layer has the function of preventing excitons generated in the light emitting layer from diffusing into surrounding layers and confining the excitons within the light emitting layer.
  • Each layer of the organic EL element can be formed by a conventionally known vapor deposition method, coating method, or the like.
  • vapor deposition methods such as vacuum evaporation method and molecular beam evaporation method (MBE method), or dipping method, spin coating method, casting method, bar coating method, roll coating method, etc. using a solution of a compound forming a layer. It can be formed by a known coating method.
  • the film thickness of each layer is not particularly limited, but in general, if the film thickness is too thin, defects such as pinholes are likely to occur, and on the other hand, if the film thickness is too thick, a high driving voltage will be required and efficiency will deteriorate, so it is usually 5 nm to 10 ⁇ m. More preferably 10 nm to 0.2 ⁇ m.
  • the total thickness of the first hole transport layer and the second hole transport layer is preferably 30 nm or more and 150 nm or more.
  • the thickness is more preferably 40 nm or more and 130 nm or less.
  • the thickness of the second hole transport layer having a two-layer structure or a three-layer structure is preferably 5 nm or more, more preferably 20 nm or more, even more preferably 25 nm or more, and particularly preferably 35 nm or more. and preferably 100 nm or less.
  • the thickness of the hole transport layer adjacent to the light emitting layer is preferably 5 nm or more, more preferably 20 nm or more, even more preferably 25 nm or more, particularly preferably 30 nm or more, and Preferably it is 100 nm or less.
  • the ratio of the film thickness D2 of the second hole transport layer to the film thickness D1 of the first hole transport layer is preferably 0.3 ⁇ D2/D1 ⁇ 4.0, more preferably 0.5 ⁇ D2/D1 ⁇ 3.5, still more preferably 0.75 ⁇ D2/D1 ⁇ 3.0.
  • the organic EL element can be used in electronic equipment such as display parts such as organic EL panel modules, display devices such as televisions, mobile phones, and personal computers, and light emitting devices for lighting and vehicle lamps.
  • Fabrication Example A-1 of organic EL device A glass substrate (manufactured by Geomatec Co., Ltd.) with a 25 mm x 75 mm x 1.1 mm ITO transparent electrode (anode) was ultrasonically cleaned in isopropyl alcohol for 5 minutes and then UV ozone cleaned for 30 minutes. The ITO film thickness was 130 nm. The cleaned glass substrate with an ITO transparent electrode was mounted on a substrate holder of a vacuum evaporation apparatus. First, a compound HT1 and a compound HI1 were co-evaporated onto the surface on which the transparent electrode was formed so as to cover the transparent electrode, thereby forming a hole injection layer having a thickness of 10 nm.
  • the mass ratio of compound HT1 and compound HI1 was 97:3.
  • compound HT1 was deposited on the hole injection layer to form a first hole transport layer with a thickness of 80 nm.
  • a compound EBL2 was deposited on the first hole transport layer to form a second hole transport layer with a thickness of 10 nm.
  • compound BXN1 compound (1): host material
  • compound BD1 dopant material
  • compound BH2-1 (host material) and compound BD1 (dopant material) were co-evaporated onto this first light emitting layer to form a second light emitting layer with a thickness of 15 nm.
  • the mass ratio of compound BH2-1 and compound BD1 (BH2-1:BD1) was 99:1.
  • compound BXN2 (compound (1)) was vapor-deposited to form a first electron-transporting layer with a thickness of 5 nm.
  • the compound ET1 and Liq were co-evaporated onto this first electron transport layer to form a second electron transport layer having a thickness of 20 nm.
  • the mass ratio of compound ET1 and Liq (ET1:Liq) was 50:50.
  • Comparative example A-1 An organic EL device was produced in the same manner as in Example A-1, except that compound BXN3 was used instead of compound BXN1, and compound HBL2 was used instead of compound BXN2.
  • the organic EL device of Example A-1 in which the two layers (first light-emitting layer and first electron transport layer) contain compound (1) (BXN1 and BXN2) has one layer ( Compared to the organic EL device of Comparative Example A-1 in which only the first light-emitting layer) contained compound (1) (BXN3), the external quantum efficiency and device lifetime were significantly improved.
  • Example B-1 A second hole transport layer is formed using compound BXN4 instead of compound EBL2, a second light emitting layer is formed using compound BH2-2 instead of compound BH2-1, and a compound HBL2 is used instead of compound BXN2.
  • An organic EL device was produced in the same manner as in Example A-1 except that the first electron transport layer was formed using the following methods. The layer structure of the organic EL device thus obtained is shown below.
  • Example B-2 An organic EL device was produced in the same manner as in Example B-1 except that the second hole transport layer was formed using compound BXN5 instead of compound BXN4.
  • Comparative example B-1 An organic EL device was produced in the same manner as in Example B-1 except that the second hole transport layer was formed using compound EBL2 instead of compound BXN4.
  • Comparative example B-2 Organic EL was produced in the same manner as in Example B-1, except that the second hole transport layer was formed using the compound EBL3 instead of the compound BXN4, and the first light emitting layer was formed using the compound BXN3 instead of the compound BXN1. The device was fabricated.
  • Table 2 shows the measurement results of EQE and LT95 obtained in the same manner as above.
  • Example B-1 and two layers (second hole transport layer and first light emitting layer) containing compound (1) (BXN4 and BXN1)
  • the transport layer and the first light emitting layer contain the compound (1) (BXN5 and BXN1)
  • only one layer (the first light emitting layer) contains the compound (1) (BXN1 or BXN3).
  • external quantum efficiency and device life were significantly improved.

Abstract

L'invention concerne : un élément électroluminescent organique comprenant une électrode positive, une électrode négative et une couche organique disposée entre l'électrode positive et l'électrode négative, la couche organique ayant une couche électroluminescente, et au moins deux couches de la couche organique comprenant un composé représenté par la formule (1) (dans la formule (1), chaque signe de référence étant tel que défini dans la description) ; et un dispositif électronique comprenant ledit élément électroluminescent organique.
PCT/JP2023/018371 2022-05-27 2023-05-17 Élément électroluminescent organique et dispositif électronique WO2023228828A1 (fr)

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JP2015142071A (ja) * 2014-01-30 2015-08-03 三星ディスプレイ株式會社Ｓａｍｓｕｎｇ Ｄｉｓｐｌａｙ Ｃｏ．，Ｌｔｄ． 有機エレクトロルミネッセンス素子
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