WO2022108258A1 - Composé et dispositif électroluminescent organique le comprenant - Google Patents

Composé et dispositif électroluminescent organique le comprenant Download PDF

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WO2022108258A1
WO2022108258A1 PCT/KR2021/016550 KR2021016550W WO2022108258A1 WO 2022108258 A1 WO2022108258 A1 WO 2022108258A1 KR 2021016550 W KR2021016550 W KR 2021016550W WO 2022108258 A1 WO2022108258 A1 WO 2022108258A1
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이성재
차용범
홍성길
금수정
이형진
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주식회사 엘지화학
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    • C07C211/57—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings being part of condensed ring systems of the carbon skeleton
    • C07C211/61—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings being part of condensed ring systems of the carbon skeleton with at least one of the condensed ring systems formed by three or more rings
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    • C07D209/56—Ring systems containing three or more rings
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    • C07D407/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00 containing two hetero rings
    • C07D407/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00 containing two hetero rings linked by a chain containing hetero atoms as chain links
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    • H10K50/00—Organic light-emitting devices
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    • C07C2603/06—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members
    • C07C2603/10—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members containing five-membered rings
    • C07C2603/12—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members containing five-membered rings only one five-membered ring
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    • C07C2603/22—Ortho- or ortho- and peri-condensed systems containing three rings containing only six-membered rings
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    • 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
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    • H10K50/14—Carrier transporting layers
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    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/18—Carrier blocking layers
    • H10K50/181—Electron blocking layers

Definitions

  • the present specification relates to a compound and an organic light emitting device including the same.
  • the organic light emitting phenomenon refers to a phenomenon in which electric energy is converted into light energy using an organic material.
  • An organic light emitting device using an organic light emitting phenomenon generally has a structure including an anode and a cathode and an organic material layer therebetween.
  • the organic material layer is often formed of a multi-layered structure composed of different materials in order to increase the efficiency and stability of the organic light-emitting device, for example, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and the like.
  • the present specification relates to a compound and an organic light emitting device including the same.
  • An exemplary embodiment of the present specification provides a compound represented by the following formula (1).
  • R1 and R2 are the same as or different from each other, and each independently hydrogen; heavy hydrogen; halogen group; nitrile group; a substituted or unsubstituted silyl group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted alkoxy group; Or a substituted or unsubstituted aryl group,
  • R3 and R4 are the same as or different from each other, and each independently hydrogen; heavy hydrogen; halogen group; nitrile group; a substituted or unsubstituted silyl group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted aryl group; Or a substituted or unsubstituted heteroaryl group,
  • a is an integer of 0 to 4, and when a is 2 or more, R3 of 2 or more are the same as or different from each other,
  • b is an integer of 0 to 2
  • R4 are the same as or different from each other
  • L1 to L4 are the same as or different from each other, and each independently a direct bond; a substituted or unsubstituted alkylene group; a substituted or unsubstituted alkenylene group; a substituted or unsubstituted arylene group; Or a substituted or unsubstituted heteroarylene group,
  • Ar3 is a substituted or unsubstituted amine group; a substituted or unsubstituted aryl group; Or a substituted or unsubstituted heteroaryl group,
  • Ar1 and Ar2 are the same as or different from each other, and are each independently a substituted or unsubstituted alkyl group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heteroaryl group; Or a compound represented by the following formula (2), wherein at least one of Ar1 and Ar2 is a compound represented by the following formula (2),
  • R5 is hydrogen; heavy hydrogen; halogen group; nitrile group; a substituted or unsubstituted silyl group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted aryl group; Or a substituted or unsubstituted heteroaryl group,
  • c is an integer from 0 to 3, and when c is 2 or more, 2 or more R5 are the same as or different from each other, respectively.
  • an exemplary embodiment of the present specification includes a first electrode; a second electrode provided to face the first electrode; and at least one organic material layer provided between the first electrode and the second electrode, wherein at least one organic material layer includes the compound.
  • the compound described herein may be used as a material for an organic layer of an organic light emitting device.
  • an organic light emitting device including the compound according to an exemplary embodiment of the present invention an organic light emitting device having excellent luminous efficiency, low driving voltage, high efficiency, and long life can be obtained.
  • the driving voltage of the device is lowered, the efficiency of the device is increased, and the lifespan is prolonged.
  • FIG. 1 shows an example of an organic light emitting device including a substrate 1 , an anode 2 , a light emitting layer 3 , and a cathode 4 .
  • FIG. 2 shows an example of an organic light emitting device including a substrate 1, an anode 2, a hole injection layer 5, a hole transport layer 6, a light emitting layer 7, an electron transport layer 8, and a cathode 4 did it
  • FIG. 3 is a substrate (1), an anode (2), a hole injection layer (5), a hole transport layer (6), an electron blocking layer (9), a light emitting layer (7), a hole blocking layer (10), electron transport and electron injection
  • an organic light emitting device connected to the layer 11 and the cathode 4 at the same time is shown.
  • the present specification provides a compound represented by the following formula (1).
  • an amine group is substituted at the 2-position of fluorene, at least one of Ar1 and Ar2 is substituted with the compound represented by Formula 2, and fluorene is substituted or unsubstituted with a substituent at the 3-position
  • fluorene is substituted or unsubstituted with a substituent at the 3-position
  • the energy barrier with each organic layer can be controlled by controlling the HOMO and LUMO energy levels of the compound.
  • substitution means that a hydrogen atom bonded to a carbon atom of a compound is replaced with another substituent, and the position to be substituted is not limited as long as the position at which the hydrogen atom is substituted, that is, a position where the substituent is substitutable, is not limited, and two or more When substituted, two or more substituents may be the same as or different from each other.
  • examples of the halogen group include fluorine (-F), chlorine (-Cl), bromine (-Br), or iodine (-I).
  • the alkyl group may be a straight chain, branched chain, or cyclic chain, and the number of carbon atoms is not particularly limited, but is preferably 1 to 50. According to an exemplary embodiment, the number of carbon atoms in the alkyl group is 1 to 40. According to another exemplary embodiment, the alkyl group has 1 to 20 carbon atoms. According to another exemplary embodiment, the number of carbon atoms in the alkyl group is 1 to 10.
  • alkyl group examples include methyl, ethyl, propyl, n-propyl, isopropyl, butyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-methyl-butyl, 1-ethyl-butyl, pentyl, n -pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, n-hexyl, 1-methylpentyl, 2-methylpentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, heptyl , n-heptyl, 1-methylhexyl, cyclopropyl, cyclobutyl, cyclopentyl, 3-methylcyclopentyl, 2,3-dimethylcyclopentyl, cyclohexyl, 3-methylcyclohexyl,
  • the alkenyl group may be linear or branched, and the number of carbon atoms is not particularly limited, but is preferably 2 to 40. According to an exemplary embodiment, the carbon number of the alkenyl group is 2 to 20. According to another exemplary embodiment, the carbon number of the alkenyl group is 2 to 10. According to another exemplary embodiment, the alkenyl group has 2 to 6 carbon atoms.
  • Specific examples include vinyl, 1-propenyl, isopropenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 3-methyl-1- Butenyl, 1,3-butadienyl, allyl, 1-phenylvinyl-1-yl, 2-phenylvinyl-1-yl, 2,2-diphenylvinyl-1-yl, 2-phenyl-2-( naphthyl-1-yl)vinyl-1-yl, 2,2-bis(diphenyl-1-yl)vinyl-1-yl, stilbenyl group, styrenyl group, and the like, but is not limited thereto.
  • the cycloalkyl group is not particularly limited, but preferably has 3 to 60 carbon atoms, and according to an exemplary embodiment, the cycloalkyl group has 3 to 30 carbon atoms. According to another exemplary embodiment, the carbon number of the cycloalkyl group is 3 to 20. According to another exemplary embodiment, the cycloalkyl group has 3 to 6 carbon atoms.
  • the alkoxy group may be a straight chain, branched chain or cyclic chain. Although carbon number of an alkoxy group is not specifically limited, It is preferable that it is C1-C40. Specifically, methoxy, ethoxy, n-propoxy, isopropoxy, i-propyloxy, n-butoxy, isobutoxy, tert-butoxy, sec-butoxy, n-pentyloxy, neopentyloxy, Isopentyloxy, n-hexyloxy, 3,3-dimethylbutyloxy, 2-ethylbutyloxy, n-octyloxy, n-nonyloxy, n-decyloxy, benzyloxy, p-methylbenzyloxy, etc. may be, but is not limited thereto.
  • the substituents containing an alkyl group, an alkoxy group, and other alkyl group moieties described herein include both straight-chain or pulverized forms.
  • the amine group is -NH 2 ; monoalkylamine group; dialkylamine group; N-alkylarylamine group; monoarylamine group; diarylamine group; triarylamine group; N-aryl heteroarylamine group; It may be selected from the group consisting of an N-alkylheteroarylamine group, a monoheteroarylamine group, and a diheteroarylamine group, and the number of carbon atoms is not particularly limited, but is preferably 1 to 30.
  • the amine group include a methylamine group, a dimethylamine group, a trimethylamine group, an ethylamine group, a diethylamine group, a triethylamine group, a phenylamine group, a naphthylamine group, a biphenylamine group, and an anthracenylamine group.
  • 9-methyl-anthracenylamine group diphenylamine group, ditolylamine group, N-phenyltolylamine group, triphenylamine group, N-phenylbiphenylamine group; N-phenylnaphthylamine group; N-biphenylnaphthylamine group; N-naphthylfluorenylamine group; N-phenylphenanthrenylamine group; N-biphenylphenanthrenylamine group; N-phenylfluorenylamine group; N-phenylterphenylamine group; N-phenanthrenylfluorenylamine group; N-biphenylfluorenylamine group and the like, but is not limited thereto.
  • the silyl group may be represented by the formula of -SiY a Y b Y c , wherein Y a , Y b and Y c are each hydrogen; a substituted or unsubstituted alkyl group; Or it may be a substituted or unsubstituted aryl group.
  • the silyl group specifically includes a trimethylsilyl group, a triethylsilyl group, a t-butyldimethylsilyl group, a vinyldimethylsilyl group, a propyldimethylsilyl group, a triphenylsilyl group, a diphenylsilyl group, a phenylsilyl group, and the like, but is not limited thereto. does not
  • the aryl group is not particularly limited, but preferably has 6 to 60 carbon atoms, and may be a monocyclic aryl group or a polycyclic aryl group. According to an exemplary embodiment, the carbon number of the aryl group is 6 to 30. According to an exemplary embodiment, the carbon number of the aryl group is 6 to 20.
  • the aryl group may be a monocyclic aryl group, such as a phenyl group, a biphenyl group, a terphenyl group, or a quaterphenyl group, but is not limited thereto.
  • the polycyclic aryl group may be a naphthyl group, anthracenyl group, phenanthrenyl group, pyrenyl group, perylenyl group, triphenyl group, chrysenyl group, fluorenyl group, triphenylenyl group, etc., but is not limited thereto not.
  • the fluorenyl group may be substituted, and two substituents may be bonded to each other to form a spiro structure.
  • fluorenyl group When the fluorenyl group is substituted, (spirofluorenyl group) and (spirobifluorenyl group), (9,9-dimethyl fluorenyl group) and It may be a substituted fluorenyl group such as (9,9-diphenylfluorenyl group), but is not limited thereto.
  • the aryl group may be substituted with an alkyl group to function as an arylalkyl group.
  • the alkyl group may be selected from the examples described above.
  • the heteroaryl group is an aromatic ring group containing one or more atoms other than carbon and heteroatoms, specifically, the heteroatoms may include one or more atoms selected from the group consisting of O, N, Se and S.
  • the heterocyclic group has 2 to 30 carbon atoms.
  • the heteroaryl group may be monocyclic or polycyclic.
  • heteroaryl group examples include a thiophene group, a furan group, a pyrrole group, an imidazole group, a thiazole group, an oxazole group, an oxadiazole group, a pyridine group, a pyrimidine group, a triazine group, a triazole group, a quinolinyl group, a quinazoline group, Carbazole group, benzoxazole group, benzimidazole group, benzothiazole group, benzocarbazole group, benzothiophene group, dibenzothiophene group, benzofuran group, phenanthroline group, isoxazole group, thiadiazole group, A naphthobenzofuran group, a dibenzofuran group, and the like, but is not limited thereto.
  • the arylene group means that the aryl group has two bonding positions, that is, a divalent group. Except that each of these is a divalent group, the description of the aryl group described above may be applied.
  • the heteroarylene group means that the heteroaryl group has two bonding positions, that is, a divalent group. Except that each of these is a divalent group, the description of the heteroaryl group described above may be applied.
  • R1 and R2 are the same as or different from each other, and each independently hydrogen; heavy hydrogen; halogen group; cyano group; nitrile group; a substituted or unsubstituted silyl group; a substituted or unsubstituted C 1 to C 40 alkyl group; a substituted or unsubstituted alkenyl group having 2 to 40 carbon atoms; a substituted or unsubstituted C 1 to C 40 alkoxy group; or a substituted or unsubstituted C6-C60 aryl group.
  • R1 and R2 are the same as or different from each other, and each independently hydrogen; heavy hydrogen; halogen group; cyano group; nitrile group; a substituted or unsubstituted silyl group; a substituted or unsubstituted C 1 to C 20 alkyl group; a substituted or unsubstituted C 2 to C 20 alkenyl group; a substituted or unsubstituted C 1 to C 20 alkoxy group; or a substituted or unsubstituted C6-C30 aryl group.
  • R1 and R2 are the same as or different from each other, and each independently a substituted or unsubstituted C 1 to C 20 alkyl group; or a substituted or unsubstituted C6-C30 aryl group.
  • R1 and R2 are the same as or different from each other, and each independently a substituted or unsubstituted methyl group; or a substituted or unsubstituted phenyl group.
  • R1 and R2 are the same as or different from each other, and each independently a methyl group; or a phenyl group.
  • the compound represented by Formula 1 may be represented by Formula 1-1 or 1-2 below.
  • R3, R4, Ar1 to Ar3, L1 to L4, a and b are as defined in Formula 1 above,
  • R6 and R7 are the same as or different from each other, and each independently hydrogen; heavy hydrogen; halogen group; nitrile group; a substituted or unsubstituted silyl group; A substituted or unsubstituted alkyl group,
  • R8 and R9 are the same as or different from each other, and each independently hydrogen; heavy hydrogen; halogen group; nitrile group; a substituted or unsubstituted silyl group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted aryl group; Or a substituted or unsubstituted heteroaryl group,
  • R6 and R7 are the same as or different from each other, and each independently hydrogen; heavy hydrogen; halogen group; nitrile group; or a substituted or unsubstituted alkyl group.
  • R6 and R7 are the same as or different from each other, and each independently hydrogen; heavy hydrogen; or a substituted or unsubstituted alkyl group.
  • R6 and R7 are the same as or different from each other, and each independently hydrogen; heavy hydrogen; or a substituted or unsubstituted C 1 to C 50 alkyl group.
  • R6 and R7 are the same as or different from each other, and each independently hydrogen; heavy hydrogen; or a substituted or unsubstituted C 1 to C 20 alkyl group.
  • R6 and R7 are the same as or different from each other, and each independently hydrogen; or an alkyl group having 1 to 10 carbon atoms.
  • R6 and R7 are the same as or different from each other, and each independently hydrogen; or a methyl group.
  • R8 and R9 are the same as or different from each other, and each independently hydrogen; heavy hydrogen; halogen group; nitrile group; a substituted or unsubstituted silyl group; a substituted or unsubstituted C 1 to C 40 alkyl group; a substituted or unsubstituted alkenyl group having 2 to 40 carbon atoms; a substituted or unsubstituted aryl group having 6 to 60 carbon atoms; Or a substituted or unsubstituted heteroaryl group having 2 to 60 carbon atoms.
  • R8 and R9 are the same as or different from each other, and each independently hydrogen; heavy hydrogen; a substituted or unsubstituted C 1 to C 20 alkyl group; or a substituted or unsubstituted C6-C30 aryl group.
  • R8 and R9 are the same as or different from each other, and each independently hydrogen; or deuterium.
  • R8 and R9 are hydrogen.
  • R3 and R4 are the same as or different from each other, and each independently hydrogen; heavy hydrogen; a substituted or unsubstituted C 1 to C 20 alkyl group; a substituted or unsubstituted C6-C30 aryl group; Or a substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms.
  • R3 and R4 are the same as or different from each other, and each independently hydrogen; or deuterium.
  • R3 and R4 are hydrogen.
  • a is an integer of 0 to 4, and when a is 2 or more, R3 of 2 or more are the same as or different from each other.
  • R3 is hydrogen, and a is 4.
  • R4 is hydrogen
  • b is 2.
  • L1 to L4 are the same as or different from each other, and each independently a direct bond; or a substituted or unsubstituted arylene group having 6 to 60 carbon atoms.
  • L1 is a direct bond; or a substituted or unsubstituted phenylene group.
  • L1 is a direct bond; or a phenylene group.
  • L1 is a direct bond.
  • L2 to L4 are the same as or different from each other, and each independently a direct bond; or a substituted or unsubstituted arylene group having 6 to 60 carbon atoms.
  • L2 to L4 are the same as or different from each other, and each independently a direct bond; a substituted or unsubstituted phenylene group; Or a substituted or unsubstituted biphenylene group.
  • L2 to L4 are the same as or different from each other, and each independently a direct bond; phenylene group; or a biphenylene group.
  • Ar3 is a substituted or unsubstituted amine group having 1 to 30 carbon atoms; a substituted or unsubstituted aryl group having 6 to 60 carbon atoms; Or a substituted or unsubstituted heteroaryl group having 2 to 60 carbon atoms.
  • Ar3 is a substituted or unsubstituted diarylamine group; a substituted or unsubstituted triarylamine group; a substituted or unsubstituted C6-C30 aryl group; Or a substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms.
  • Ar3 is a substituted or unsubstituted diphenylamine group; a substituted or unsubstituted triphenylamine group; a substituted or unsubstituted phenyl group; a substituted or unsubstituted biphenyl group; a substituted or unsubstituted naphthyl group; a substituted or unsubstituted fluorenyl group; A substituted or unsubstituted dibenzofuranyl group; a substituted or unsubstituted dibenzothiophenyl group; Or a substituted or unsubstituted carbazolyl group.
  • Ar1 and Ar2 are the same as or different from each other, and each independently a substituted or unsubstituted C 1 to C 40 alkyl group; a substituted or unsubstituted alkenyl group having 2 to 40 carbon atoms; a substituted or unsubstituted C 3 to C 60 cycloalkyl group; a substituted or unsubstituted aryl group having 6 to 60 carbon atoms; a substituted or unsubstituted heteroaryl group having 2 to 60 carbon atoms; or a compound represented by Formula 2, wherein at least one of Ar1 and Ar2 is a compound represented by Formula 2 above.
  • Ar1 and Ar2 are the same as or different from each other, and each independently a substituted or unsubstituted C 1 to C 20 alkyl group; a substituted or unsubstituted C 2 to C 20 alkenyl group; a substituted or unsubstituted C 3 to C 30 cycloalkyl group; a substituted or unsubstituted C6-C30 aryl group; a substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms; or a compound represented by Formula 2, wherein at least one of Ar1 and Ar2 is a compound represented by Formula 2 above.
  • Ar1 and Ar2 are the same as or different from each other, and each independently a substituted or unsubstituted methyl group; a substituted or unsubstituted propyl group; a substituted or unsubstituted ter-butyl group; a substituted or unsubstituted adamantyl group; a substituted or unsubstituted phenyl group; a substituted or unsubstituted biphenyl group; a substituted or unsubstituted terphenyl group; a substituted or unsubstituted naphthyl group; a substituted or unsubstituted phenanthrenyl group; a substituted or unsubstituted triphenylenyl group; a substituted or unsubstituted fluorenyl group; A substituted or unsubstituted dibenzofuranyl group; a substituted or unsubstituted dibenz
  • Ar1 and Ar2 are the same as or different from each other, and each independently a ter-butyl group; adamantyl group; phenyl group; biphenyl group; terphenyl group; a naphthyl group unsubstituted or substituted with a phenyl group; phenanthrenyl group; triphenylenyl group; fluorenyl group; dimethyl fluorenyl group; diphenyl fluorenyl group; spirobifluorenyl group; dibenzofuranyl group; dibenzothiophenyl group; a carbazolyl group unsubstituted or substituted with a phenyl group; or a compound represented by Formula 2, wherein at least one of Ar1 and Ar2 is a compound represented by Formula 2 above.
  • R5 is hydrogen; heavy hydrogen; a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; Or a substituted or unsubstituted heteroaryl group.
  • R5 is hydrogen; or deuterium.
  • R5 is hydrogen
  • R5 is hydrogen
  • c is 3.
  • the compound of Formula 1 may be represented by any one of the following compounds.
  • the compound of Formula 1 of the present specification may have a core structure as shown in the following reaction scheme. Substituents may be combined by methods known in the art, and the type, position, and number of substituents may be changed according to techniques known in the art.
  • X and Y may be halogen groups such as Cl, Br, and I.
  • compounds having various energy band gaps can be synthesized by introducing various substituents into the core structure as described above.
  • the HOMO and LUMO energy levels of the compound can be controlled by introducing various substituents into the core structure of the structure as described above.
  • a compound having the intrinsic properties of the introduced substituent can be synthesized.
  • a substituent mainly used for a hole injection layer material, a hole transport material, an electron suppression material, a light emitting layer material, and an electron transport layer material used in manufacturing an organic light emitting device into the core structure, the conditions required for each organic material layer are satisfied. substances can be synthesized.
  • the organic light emitting device includes a first electrode; a second electrode provided to face the first electrode; and at least one organic material layer provided between the first electrode and the second electrode, wherein at least one of the organic material layers comprises the compound represented by the above-described formula (1).
  • the organic light emitting device of the present specification may be manufactured by a conventional method and material for manufacturing an organic light emitting device, except for forming one or more organic material layers using the above-described compound.
  • the compound may be formed into an organic material layer by a solution coating method as well as a vacuum deposition method when manufacturing an organic light emitting device.
  • the solution coating method refers to spin coating, dip coating, inkjet printing, screen printing, spraying, roll coating, and the like, but is not limited thereto.
  • the organic material layer of the organic light emitting device of the present specification may have a single-layer structure, but may have a multi-layer structure in which two or more organic material layers are stacked.
  • the organic light emitting device of the present specification is an organic material layer, a hole injection layer, a hole transport layer, a layer that transports and injects holes at the same time, an electron blocking layer, a light emitting layer, an electron transport layer and an electron injection layer, and a layer that simultaneously transports and injects electrons. It may have a structure including the like.
  • the structure of the organic light emitting device is not limited thereto and may include a smaller number or a larger number of organic material layers.
  • the organic material layer may include an electron transport layer or an electron injection layer, and the electron transport layer or the electron injection layer may include the above-described compound.
  • the organic material layer may include a hole injection layer or a hole transport layer, and the hole injection layer or the hole transport layer may include the above-described compound.
  • the organic material layer includes a light emitting layer, and the light emitting layer includes the above-described compound.
  • the organic material layer may include an emission layer, and the emission layer may include the above-described compound as a dopant of the emission layer.
  • the organic material layer includes an emission layer
  • the emission layer includes the above-described compound as a dopant of the emission layer, and may further include a host.
  • the organic material layer includes a light emitting layer
  • the light emitting layer includes the above-described compound as a dopant of the light emitting layer, a fluorescent host or a phosphorescent host, and another organic compound, a metal or a metal compound as a dopant may include
  • the organic material layer includes an emission layer
  • the emission layer includes the above-described compound as a dopant of the emission layer, a fluorescent host or a phosphorescent host, and may be used together with an iridium-based (Ir) dopant.
  • the organic material layer may include an emission layer, and the emission layer may include the above-described compound as a host of the emission layer.
  • the organic material layer may include an emission layer, and the emission layer may include the above-described compound as a host of the emission layer and further include a dopant.
  • the organic material layer may include an electron blocking layer, and the electron blocking layer may include the compound described above.
  • the first electrode is an anode
  • the second electrode is a cathode
  • the first electrode is a cathode
  • the second electrode is an anode
  • the organic light emitting device may have, for example, a stacked structure as follows, but is not limited thereto.
  • the structure of the organic light emitting device of the present specification may have a structure as shown in FIGS. 1 to 3 , but is not limited thereto.
  • FIG. 1 illustrates a structure of an organic light emitting device in which an anode 2, a light emitting layer 3, and a cathode 4 are sequentially stacked on a substrate 1 .
  • the compound may be included in the light emitting layer 3 .
  • an organic light emitting device in which an anode 2, a hole injection layer 5, a hole transport layer 6, a light emitting layer 7, an electron transport layer 8, and a cathode 4 are sequentially stacked on a substrate 1
  • the structure is illustrated.
  • the compound may be included in the hole injection layer 5 , the hole transport layer 6 , the light emitting layer 7 or the electron transport layer 8 .
  • FIG. 3 shows an anode 2, a hole injection layer 5, a hole transport layer 6, an electron blocking layer 9, a light emitting layer 7, a hole blocking layer 10, an electron transport and electron injection on the substrate 1
  • the structure of the organic light emitting device in which the layer 11 and the cathode 4 are sequentially stacked is illustrated. In such a structure, the compound may be included in the hole transport layer 6 or the electron blocking layer 9 .
  • the organic light emitting device uses a PVD (physical vapor deposition) method such as sputtering or e-beam evaporation to form a metal or a conductive metal oxide or an alloy thereof on a substrate.
  • a PVD physical vapor deposition
  • an organic material layer including a hole injection layer, a hole transport layer, a light emitting layer, an electron blocking layer, a hole suppression layer, and a layer for simultaneously transporting and injecting electrons is formed thereon as a cathode
  • an organic light emitting device may be manufactured by sequentially depositing a cathode material, an organic material layer, and an anode material on a substrate.
  • the organic material layer includes a hole injection layer, a hole transport layer, a hole suppression layer, a layer that simultaneously injects and transports electrons, an electron blocking layer, a light emitting layer and an electron transport layer, an electron injection layer, a layer that simultaneously injects holes and transports holes, etc. It may have a multi-layer structure, but is not limited thereto and may have a single-layer structure.
  • the organic layer is formed using a variety of polymer materials in a smaller number by a solvent process rather than a vapor deposition method, such as spin coating, dip coating, doctor blading, screen printing, inkjet printing, or thermal transfer method. It can be made in layers.
  • the cathode is an electrode for injecting electrons
  • the cathode material is preferably a material having a small work function to facilitate electron injection into the organic material layer.
  • the negative electrode material include metals such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin and lead, or alloys thereof; and a multi-layered material such as LiF/Al or LiO 2 /Al, but is not limited thereto.
  • the hole injection layer is a layer that facilitates injection of holes from the anode to the light emitting layer.
  • the hole injection material holes can be well injected from the anode at a low voltage, and the highest occupied (HOMO) of the hole injection material is The molecular orbital) is preferably between the work function of the positive electrode material and the HOMO of the surrounding organic material layer.
  • the hole injection material include metal porphyrine, oligothiophene, arylamine-based organic material, hexanitrile hexaazatriphenylene-based organic material, quinacridone-based organic material, and perylene-based organic material. of organic substances, anthraquinones, polyaniline and polythiophene-based conductive polymers, and the like, but are not limited thereto.
  • the hole transport layer may serve to facilitate hole transport.
  • a material capable of receiving holes from the anode or the hole injection layer and transferring them to the light emitting layer is suitable. Specific examples include, but are not limited to, an arylamine-based organic material, a conductive polymer, and a block copolymer having a conjugated portion and a non-conjugated portion together.
  • the electron blocking layer is formed on the hole transport layer, preferably provided in contact with the light emitting layer, to control hole mobility, prevent excessive movement of electrons, and increase the hole-electron coupling probability by increasing the efficiency of the organic light emitting device It means a layer that plays a role in improving
  • the electron blocking layer includes an electron blocking material, and as an example of the electron blocking material, a compound represented by Formula 1 may be used, or an arylamine-based organic material may be used, but is not limited thereto.
  • Specific examples include 8-hydroxy-quinoline aluminum complex (Alq3); carbazole-based compounds; dimerized styryl compounds; BAlq; 10-hydroxybenzo quinoline-metal compounds; compounds of the benzoxazole, benzthiazole and benzimidazole series; Poly(p-phenylenevinylene) (PPV)-based polymers; spiro compounds; polyfluorene, rubrene, and the like, but is not limited thereto.
  • Alq3 8-hydroxy-quinoline aluminum complex
  • carbazole-based compounds dimerized styryl compounds
  • BAlq 10-hydroxybenzo quinoline-metal compounds
  • compounds of the benzoxazole, benzthiazole and benzimidazole series Poly(p-phenylenevinylene) (PPV)-based polymers
  • spiro compounds polyfluorene, rubrene, and the like, but is not limited thereto.
  • a hole blocking layer may be provided between the electron transport layer and the light emitting layer, and the hole blocking layer is a layer that blocks the holes from reaching the cathode, and may be generally formed under the same conditions as the hole injection layer.
  • the hole-inhibiting material includes, but is not limited to, a triazine derivative, a phenanthroline derivative, and the like, and materials known in the art may be used.
  • the electron transport layer may serve to facilitate the transport of electrons.
  • the electron transport material a material capable of receiving electrons from the cathode and transferring them to the light emitting layer is suitable, and a material having high electron mobility is suitable. Specific examples include Al complex of 8-hydroxyquinoline; complexes containing Alq 3 ; organic radical compounds; hydroxyflavone-metal complexes, and the like, but are not limited thereto.
  • the electron injection layer may serve to facilitate electron injection.
  • the electron injection material has the ability to transport electrons, has an electron injection effect from the cathode, an excellent electron injection effect on the light emitting layer or the light emitting material, prevents the movement of excitons generated in the light emitting layer to the hole injection layer, and , a compound having excellent thin film forming ability is preferable.
  • fluorenone anthraquinodimethane, diphenoquinone, thiopyran dioxide, oxazole, oxadiazole, triazole, imidazole, perylenetetracarboxylic acid, preorenylidene methane, anthrone, etc., derivatives thereof, metals complex compounds and nitrogen-containing 5-membered ring derivatives, but are not limited thereto.
  • the metal complex compound examples include 8-hydroxyquinolinato lithium, bis(8-hydroxyquinolinato)zinc, bis(8-hydroxyquinolinato)copper, bis(8-hydroxyquinolinato)manganese, Tris(8-hydroxyquinolinato)aluminum, tris(2-methyl-8-hydroxyquinolinato)aluminum, tris(8-hydroxyquinolinato)gallium, bis(10-hydroxybenzo[h] Quinolinato) beryllium, bis (10-hydroxybenzo [h] quinolinato) zinc, bis (2-methyl-8-quinolinato) chlorogallium, bis (2-methyl-8-quinolinato) ( o-crezolato)gallium, bis(2-methyl-8-quinolinato)(1-naphtolato)aluminum, bis(2-methyl-8-quinolinato)(2-naphtolato)gallium, etc.
  • the present invention is not limited thereto.
  • the organic light emitting device according to the present invention may be a top emission type, a back emission type, or a double side emission type depending on the material used.
  • a glass substrate coated with ITO (Indium Tin Oxide) to a thickness of 1,400 ⁇ was placed in distilled water in which detergent was dissolved and washed with ultrasonic waves.
  • a product manufactured by Fischer Co. was used as the detergent
  • distilled water that was secondarily filtered with a filter manufactured by Millipore Co. was used as the distilled water.
  • ultrasonic cleaning was performed for 10 minutes by repeating twice with distilled water.
  • ultrasonic washing was performed with a solvent of isopropyl alcohol, acetone, and methanol, and after drying, it was transported to a plasma cleaner.
  • the substrate was transported to a vacuum evaporator.
  • a hole injection layer was formed by thermal vacuum deposition of a compound represented by the following formula HAT on the prepared ITO transparent electrode to a thickness of 100 ⁇ .
  • the compound 1 prepared in Synthesis Example 1 was thermally vacuum deposited to a thickness of 150 ⁇ as an electron blocking layer.
  • the compound represented by the following formula BH and the compound represented by the following formula BD were vacuum-deposited to a thickness of 200 ⁇ in a weight ratio of 25:1.
  • a compound represented by the following Chemical Formula HB1 was vacuum-deposited to a thickness of 50 ⁇ .
  • a compound represented by the following formula ET1 and a compound represented by the following Liq were thermally vacuum deposited to a thickness of 310 ⁇ in a weight ratio of 1:1.
  • An organic light emitting device was manufactured by sequentially depositing lithium fluoride (LiF) to a thickness of 12 ⁇ and aluminum to a thickness of 1000 ⁇ on the layer for performing the electron transport and injection at the same time to form a cathode.
  • LiF lithium fluoride
  • Experimental Examples 1-2 to 1-20 and Comparative Experimental Example 1-1 in the same manner as in Experimental Example 1-1, except that the compound shown in Table 1 was used instead of Compound 1 in Experimental Example 1-1.
  • organic light emitting devices were manufactured.
  • a current of 10 mA/cm 2 was applied to the organic light emitting diodes prepared in Experimental Examples 1-2 to 1-20 and Comparative Experimental Examples 1-1 to 1-4, voltage, efficiency, color coordinates, and lifespan were measured and the The results are shown in Table 1 below.
  • T95 denotes the time it takes for the luminance to decrease from the initial luminance (6000 nit) to 95% at a current density of 10 mA/cm 2 .
  • the compound of the present invention has excellent electron blocking ability, and it was confirmed that the organic light emitting device using the same as the electron blocking layer exhibits remarkable effects in terms of driving voltage, efficiency and lifespan.
  • Experimental Example 1-1 the compound represented by Formula EB1 was used instead of Compound 1 as the electron blocking layer, and the compound shown in Table 2 was used instead of the compound represented by Formula HT1 as the hole transport layer.
  • Organic light emitting devices of Experimental Examples 2-1 to 2-24 and Comparative Experimental Examples 2-1 to 2-4 were manufactured in the same manner as in Experimental Example 1-1.
  • a current of 10 mA/cm 2 was applied to the organic light emitting diodes prepared in Experimental Examples 2-1 to 2-24 and Comparative Experimental Examples 2-1 to 2-4, voltage, efficiency, color coordinates and lifetime were measured and the The results are shown in Table 2 below.
  • T95 denotes a time required for the luminance to decrease from the initial luminance (6000 nit) to 95%.
  • the compound of the present invention has excellent hole transport ability, and it was confirmed that the organic light emitting device using the same as the hole transport layer exhibits remarkable effects in terms of driving voltage, efficiency, and lifespan.

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  • Electroluminescent Light Sources (AREA)

Abstract

La présente invention concerne un composé de formule chimique 1 et un dispositif électroluminescent organique le comprenant.
PCT/KR2021/016550 2020-11-19 2021-11-12 Composé et dispositif électroluminescent organique le comprenant WO2022108258A1 (fr)

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