WO2023204668A1 - Nouveau composé et dispositif électroluminescent organique le comprenant - Google Patents

Nouveau composé et dispositif électroluminescent organique le comprenant Download PDF

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WO2023204668A1
WO2023204668A1 PCT/KR2023/005465 KR2023005465W WO2023204668A1 WO 2023204668 A1 WO2023204668 A1 WO 2023204668A1 KR 2023005465 W KR2023005465 W KR 2023005465W WO 2023204668 A1 WO2023204668 A1 WO 2023204668A1
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김동희
서상덕
이정하
김영석
오중석
오민택
이동훈
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주식회사 엘지화학
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Priority to CN202380014078.6A priority Critical patent/CN118119616A/zh
Publication of WO2023204668A1 publication Critical patent/WO2023204668A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D413/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
    • C07D413/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
    • C07D413/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings directly linked by a ring-member-to-ring-member bond
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
    • C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
    • C07D417/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 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
    • 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
    • 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
    • H10K85/649—Aromatic compounds comprising a hetero atom
    • H10K85/654—Aromatic compounds comprising a hetero atom comprising only nitrogen as heteroatom
    • 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
    • H10K85/649—Aromatic compounds comprising a hetero atom
    • H10K85/656—Aromatic compounds comprising a hetero atom comprising two or more different heteroatoms per ring
    • 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
    • H10K85/649—Aromatic compounds comprising a hetero atom
    • H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons

Definitions

  • the present invention relates to novel compounds and organic light-emitting devices containing them.
  • organic luminescence refers to a phenomenon that converts electrical energy into light energy using organic materials.
  • Organic light-emitting devices using the organic light-emitting phenomenon have a wide viewing angle, excellent contrast, fast response time, and excellent luminance, driving voltage, and response speed characteristics, so much research is being conducted.
  • Organic light emitting devices generally have a structure including an anode, a cathode, and an organic material layer between the anode and the cathode.
  • the organic material layer is often composed of a multi-layer structure made of different materials to increase the efficiency and stability of the organic light-emitting device, and may be composed of, for example, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer.
  • a voltage when a voltage is applied between the two electrodes, holes are injected from the anode and electrons from the cathode into the organic material layer. When the injected holes and electrons meet, an exciton is formed, and this exciton is When it falls back to the ground state, it glows.
  • organic light-emitting devices have been developed using a solution process, especially an inkjet process, instead of the existing deposition process.
  • a solution process especially an inkjet process
  • inkjet process instead of the existing deposition process.
  • HIL, HTL, and EML in the form of a fixed structure were performed using a solution process, and the subsequent processes were carried out using the existing deposition process.
  • a hybrid process utilizing is being studied.
  • the present invention provides a novel organic light-emitting device material that can be used in an organic light-emitting device and at the same time can be used in a solution process.
  • Patent Document 0001 Korean Patent Publication No. 10-2000-0051826
  • the present invention relates to novel compounds and organic light-emitting devices containing them.
  • the present invention provides a compound represented by the following formula (1):
  • One of X 1 and X 2 is N, the other is O or S,
  • R 1 to R 8 is a substituent represented by the following formula (2), and the others are hydrogen; heavy hydrogen; Substituted or unsubstituted C 6-60 aryl; or C 2-60 heteroaryl containing one or more heteroatoms selected from the group consisting of substituted or unsubstituted N, O and S,
  • R 9 is hydrogen; heavy hydrogen; Substituted or unsubstituted C 6-60 aryl; or substituted or unsubstituted C 2-60 heteroaryl containing one or more heteroatoms selected from the group consisting of N, O and S, provided that substituted or unsubstituted triazinyl at R 9 is excluded,
  • L 1 is a direct bond; Substituted or unsubstituted C 6-60 arylene; or substituted or unsubstituted C 2-60 heteroarylene containing one or more heteroatoms selected from the group consisting of N, O and S, and indolecarbazolene is excluded in L 1 ,
  • L 2 is a direct bond; Substituted or unsubstituted C 6-60 arylene; or a C 2-60 heteroarylene containing one or more heteroatoms selected from the group consisting of substituted or unsubstituted N, O, and S,
  • L 3 is a direct bond; Substituted or unsubstituted C 6-60 arylene; or a C 2-60 heteroarylene containing one or more heteroatoms selected from the group consisting of substituted or unsubstituted N, O, and S,
  • Ar 1 is substituted or unsubstituted C 6-60 aryl; or C 2-60 heteroaryl containing one or more heteroatoms selected from the group consisting of substituted or unsubstituted N, O and S,
  • Ar 2 is substituted or unsubstituted C 6-60 aryl; or C 2-60 heteroaryl containing one or more heteroatoms selected from the group consisting of substituted or unsubstituted N, O, and S.
  • the present invention includes a first electrode; a second electrode provided opposite to the first electrode; and an organic material layer provided between the first electrode and the second electrode, wherein the organic material layer includes a compound represented by Formula 1.
  • the organic material layer containing the above compound may be a light-emitting layer.
  • the compound represented by the above-described formula 1 can be used as a material for the organic layer of an organic light-emitting device, and can improve efficiency, low driving voltage, and/or lifespan characteristics of the organic light-emitting device.
  • the compound represented by the above-mentioned formula 1 can be used as a hole injection, hole transport, hole injection and transport, electron suppression, light emission, electron transport, or electron injection material.
  • Figure 1 shows an example of an organic light emitting device consisting of a substrate 1, an anode 2, a light emitting layer 3, and a cathode 4.
  • FIG. 2 shows a substrate (1), an anode (2), a hole injection layer (5), a hole transport layer (6), an electron blocking layer (3), a light emitting layer (3), an electron injection and transport layer (8), and a cathode (4). It shows an example of an organic light emitting device made of.
  • substituted or unsubstituted refers to deuterium; halogen group; Cyano group; nitro group; hydroxyl group; carbonyl group; ester group; imide group; amino group; Phosphine oxide group; Alkoxy group; Aryloxy group; Alkylthioxy group; Arylthioxy group; Alkyl sulphoxy group; Aryl sulfoxy group; silyl group; boron group; Alkyl group; Cycloalkyl group; alkenyl group; Aryl group; Aralkyl group; Aralkenyl group; Alkylaryl group; Alkylamine group; Aralkylamine group; heteroarylamine group; Arylamine group; Arylphosphine group; or substituted or unsubstituted with one or more substituents selected from the group consisting of heteroaryl containing one or more of N, O and S atoms, or substituted or unsubstituted with two or more of the above-exe
  • a substituent group in which two or more substituents are connected may be a biphenyl group. That is, the biphenyl group may be an aryl group, or it may be interpreted as a substituent in which two phenyl groups are connected.
  • the carbon number of the carbonyl group is not particularly limited, but is preferably 1 to 40 carbon atoms. Specifically, it may be a compound with the following structure, but is not limited thereto.
  • the oxygen of the ester group may be substituted with a straight-chain, branched-chain, or ring-chain alkyl group having 1 to 25 carbon atoms or an aryl group having 6 to 25 carbon atoms.
  • it may be a compound of the following structural formula, but is not limited thereto.
  • the carbon number of the imide group is not particularly limited, but is preferably 1 to 25 carbon atoms. Specifically, it may be a compound with the following structure, but is not limited thereto.
  • the silyl group specifically includes trimethylsilyl group, triethylsilyl group, t-butyldimethylsilyl group, vinyldimethylsilyl group, propyldimethylsilyl group, triphenylsilyl group, diphenylsilyl group, phenylsilyl group, etc. However, it is not limited to this.
  • the boron group specifically includes trimethyl boron group, triethyl boron group, t-butyldimethyl boron group, triphenyl boron group, and phenyl boron group, but is not limited thereto.
  • halogen groups include fluorine, chlorine, bromine, or iodine.
  • the alkyl group may be straight chain or branched, and the number of carbon atoms is not particularly limited, but is preferably 1 to 40. According to one embodiment, the carbon number of the alkyl group is 1 to 20. According to another embodiment, the carbon number of the alkyl group is 1 to 10. According to another embodiment, the carbon number of the alkyl group is 1 to 6. Specific examples of alkyl groups 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, cyclopentylmethyl, cyclohexylmethyl, octyl, n-octyl, tert-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propylpentyl, n-nonyl, 2,2 -Dimethylheptyl, 1-ethyl-propyl, 1,1-dimethyl-propyl, isohexyl, 2-methylpentyl, 4-methylhexyl, 5-methylhexyl, etc., but is not limited to these
  • the alkenyl group may be straight chain or branched, and the number of carbon atoms is not particularly limited, but is preferably 2 to 40. According to one embodiment, the alkenyl group has 2 to 20 carbon atoms. According to another embodiment, the alkenyl group has 2 to 10 carbon atoms. According to another 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, etc., but are not limited to these.
  • the cycloalkyl group is not particularly limited, but preferably has 3 to 60 carbon atoms, and according to one embodiment, the cycloalkyl group has 3 to 30 carbon atoms. According to another embodiment, the carbon number of the cycloalkyl group is 3 to 20. According to another embodiment, the carbon number of the cycloalkyl group is 3 to 6.
  • Examples include, but are not limited to, 4,5-trimethylcyclohexyl, 4-tert-butylcyclohexyl, cycloheptyl, and cyclooctyl.
  • 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 one embodiment, the aryl group has 6 to 30 carbon atoms. According to one embodiment, the aryl group has 6 to 20 carbon atoms.
  • the aryl group may be a monocyclic aryl group, such as a phenyl group, a biphenyl group, or a terphenyl group, but is not limited thereto.
  • the polycyclic aryl group may be a naphthyl group, anthracenyl group, phenanthrenyl group, pyrenyl group, perylenyl group, chrysenyl group, fluorenyl group, etc., but is not limited thereto.
  • the fluorenyl group may be substituted, and two substituents may be combined with each other to form a spiro structure.
  • the fluorenyl group is substituted, It can be etc. However, it is not limited to this.
  • heteroaryl is a heteroaryl containing one or more of O, N, Si, and S as a heteroelement, and the number of carbon atoms is not particularly limited, but is preferably 2 to 60 carbon atoms.
  • heteroaryl include xanthene, thioxanthen, thiophene group, furan group, pyrrole group, imidazole group, thiazole group, oxazole group, oxadiazole group, triazole group, pyridyl group, bipyridyl group, Pyrimidyl group, triazine group, acridyl group, pyridazine group, pyrazinyl group, quinolinyl group, quinazoline group, quinoxalinyl group, phthalazinyl group, pyrido pyrimidinyl group, pyrido pyrazinyl group, pyrazino Pyrazinyl group, isoquinoline group
  • the aryl group among the aralkyl group, aralkenyl group, alkylaryl group, arylamine group, and arylsilyl group is the same as the example of the aryl group described above.
  • the aralkyl group, alkylaryl group, and alkylamine group are the same as the examples of the alkyl group described above.
  • the description regarding heteroaryl described above may be applied to heteroaryl among heteroarylamines.
  • the alkenyl group among the aralkenyl groups is the same as the example of the alkenyl group described above.
  • the description of the aryl group described above can be applied, except that arylene is a divalent group.
  • the description of heteroaryl described above can be applied, except that heteroarylene is a divalent group.
  • the description of the aryl group or cycloalkyl group described above can be applied, except that the hydrocarbon ring is not monovalent and is formed by combining two substituents.
  • the description of heteroaryl described above can be applied, except that the heterocycle is not monovalent and is formed by combining two substituents.
  • deuterated or substituted with deuterium means that at least one of the replaceable hydrogens in a compound, a divalent linking group, or a monovalent substituent is replaced with deuterium.
  • unsubstituted or substituted with deuterium means “one to the maximum number of unsubstituted or replaceable hydrogens is substituted with deuterium.”
  • phenanthryl unsubstituted or substituted with deuterium means “unsubstituted or substituted with 1 to 9 deuteriums,” considering that the maximum number of hydrogens that can be substituted with deuterium in the phenanthryl structure is 9. It can be understood to mean “substituted phenanthryl.”
  • deuterated structure refers to compounds of all structures in which at least one hydrogen is replaced with deuterium, a divalent linking group, or a monovalent substituent.
  • deuterated structure of phenyl can be understood to refer to monovalent substituents of all structures in which at least one replaceable hydrogen in the phenyl group is replaced with deuterium, as follows.
  • the “deuterium substitution rate” or “deuteration degree” of a compound is the number of substituted deuteriums relative to the total number of hydrogens that can be present in the compound (the total sum of the number of hydrogens that can be replaced by deuterium and the number of substituted deuteriums in the compound). It means calculating the ratio as a percentage. Therefore, when the “deuterium substitution rate” or “deuteration degree” of a compound is “K%”, it means that K% of the hydrogen replaceable by deuterium in the compound has been replaced with deuterium.
  • the “deuterium substitution rate” or “deuteration degree” is determined by MALDI-TOF MS (Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometer), nuclear magnetic resonance spectroscopy ( 1H NMR), TLC/MS (Thin -It can be measured according to commonly known methods using Layer Chromatography/Mass Spectrometry) or GC/MS (Gas Chromatography/Mass Spectrometry). More specifically, when using MALDI-TOF MS, the “deuterium substitution rate” or “deuteration degree” is calculated by calculating the number of deuterium substituted in the compound through MALDI-TOF MS analysis, and then comparing the total number of hydrogens that may exist in the compound. The ratio of the number of deuteriums formed can be calculated as a percentage.
  • the present invention provides a compound represented by Formula 1 above.
  • the compound has a structure in which a triazinyl group represented by Formula 2 is substituted in the phenanthrooxazole or phenanthrothiazole parent nucleus structure.
  • the triazinyl group represented by Formula 2 has the characteristic of not being bonded to the R9 position, that is, the 2nd position of the parent nucleus structure.
  • the compound represented by Formula 1 having such a structure contributes to the stabilization of exciton compared to compounds having a different structure and at the same time has an excellent energy transfer ability to a dopant, making it suitable for use as a host material.
  • one of X 1 and X 2 is N, and the other is O or S.
  • the dotted line means that a bond may or may not exist. More specifically, in Formula 1, the dotted line is the bond between the N atom of X 1 and X 2 and the carbon atom substituted with R 9 The bond is a double bond, and the bond between the O or S atom of X 1 and X 2 and the carbon atom substituted with R 9 is a single bond.
  • the compound represented by Formula 1 may be represented by the following Formula 1-1 or 1-2:
  • X is O or S
  • R 1 to R 8 are as defined in Formula 1 above.
  • R 1 to R 8 is a substituent represented by Formula 2 below, and the others are each independently hydrogen; heavy hydrogen; Substituted or unsubstituted C 6-60 aryl; Alternatively, it may be a C 2-60 heteroaryl containing one or more heteroatoms selected from the group consisting of substituted or unsubstituted N, O, and S.
  • any one of R 4 to R 6 of Formula 1 may be a substituent represented by Formula 2.
  • R 1 to R 8 of Formula 1 the remainder that is not a substituent represented by Formula 2 is hydrogen; Or it may be deuterium.
  • R 9 is hydrogen; heavy hydrogen; Substituted or unsubstituted C 6-60 aryl; Alternatively, it may be a C 2-60 heteroaryl containing one or more heteroatoms selected from the group consisting of substituted or unsubstituted N, O, and S. However, substituted or unsubstituted triazinyl at R 9 is excluded.
  • R 9 may be unsubstituted or phenyl substituted with one or more deuterium.
  • L 1 is a direct bond; Substituted or unsubstituted C 6-60 arylene; or a C 2-60 heteroarylene containing one or more heteroatoms selected from the group consisting of substituted or unsubstituted N, O, and S, and indolocarbazolylene is excluded from L 1 .
  • L 1 may be a direct bond.
  • L 2 is a direct bond; Substituted or unsubstituted C 6-60 arylene; Alternatively, it may be a C 2-60 heteroarylene containing one or more heteroatoms selected from the group consisting of substituted or unsubstituted N, O, and S.
  • L 2 is a direct bond; Alternatively, it may be unsubstituted or substituted with one or more deuterium phenylene.
  • L 3 is a direct bond; Substituted or unsubstituted C 6-60 arylene; Alternatively, it may be a C 2-60 heteroarylene containing one or more heteroatoms selected from the group consisting of substituted or unsubstituted N, O, and S.
  • L 3 is a direct bond; Alternatively, it may be phenylene that is unsubstituted or substituted with one or more deuterium.
  • Ar 1 is substituted or unsubstituted C 6-60 aryl; Alternatively, it may be a C 2-60 heteroaryl containing one or more heteroatoms selected from the group consisting of substituted or unsubstituted N, O, and S.
  • Ar 1 is phenyl; naphthyl; Or it may be biphenylyl, and Ar 1 may be unsubstituted or substituted with one or more deuterium.
  • Ar 2 is substituted or unsubstituted C 6-60 aryl; Alternatively, it may be a C 2-60 heteroaryl containing one or more heteroatoms selected from the group consisting of substituted or unsubstituted N, O, and S.
  • Ar 2 is phenyl; naphthyl; Or it may be biphenylyl, and Ar 2 may be unsubstituted or substituted with one or more deuterium.
  • the compound may not contain deuterium or may contain one or more deuterium.
  • the deuterium substitution rate of the compound may be 1% to 100%. Specifically, the deuterium substitution rate of the compound is 5% or more, 10% or more, 20% or more, 25% or more, 30% or more, 40% or more, or 50% or more, and is 100% or less, 90% or less, or 80% or less. It may be less than or equal to 70%.
  • the compound may not contain deuterium, or may contain 1 to 30 deuterium.
  • the compound when the compound contains deuterium, the compound contains 1 or more, 3 or more, 5 or more, 7 or more, 10 or more, 12 or more, or 15 or more, but not more than 30, 28 It may contain no more than 26, no more than 24, no more than 22, no more than 20, no more than 18, or no more than 16 deuterium.
  • Reaction Scheme 1 is a reaction scheme for the case where Formula 2 is located at R 4 in Formula 1. If you want to use Formula 2 as a substituent at a different position, Scheme 1 may be applied.
  • the present invention provides an organic light-emitting device containing the compound represented by Formula 1 above.
  • the present invention includes a first electrode; a second electrode provided opposite to the first electrode; and an organic light-emitting device comprising at least one organic material layer provided between the first electrode and the second electrode, wherein at least one layer of the organic material layer includes a compound represented by Formula 1. .
  • the organic material layer of the organic light emitting device of the present invention may have a single-layer structure, or may have a multi-layer structure in which two or more organic material layers are stacked.
  • the organic light emitting device of the present invention may have a structure including a hole injection layer, a hole transport layer, a light emitting layer, a hole blocking layer, an electron transport layer, an electron injection layer, etc. as organic layers.
  • the structure of the organic light emitting device is not limited to this and may include fewer organic layers.
  • the organic material layer may include a hole injection layer, a hole transport layer, or a layer that simultaneously performs hole injection and transport, and the hole injection layer, the hole transport layer, or a layer that simultaneously performs hole injection and transport is represented by Formula 1 It may contain the indicated compounds.
  • the organic layer may include a light-emitting layer, and the light-emitting layer may include the compound represented by Formula 1.
  • the organic material layer may include a hole blocking layer, an electron transport layer, an electron injection layer, or a layer that simultaneously performs electron transport and electron injection, and the hole blocking layer, an electron transport layer, an electron injection layer, or an electron transport and electron injection layer.
  • the layer that is simultaneously injected may include the compound represented by Formula 1 above.
  • the organic layer may include a light-emitting layer and an electron injection and transport layer
  • the electron injection and transport layer may include the compound represented by Formula 1.
  • the organic light emitting device according to the present invention may be a normal type organic light emitting device in which an anode, one or more organic material layers, and a cathode are sequentially stacked on a substrate. Additionally, the organic light emitting device according to the present invention may be an inverted type organic light emitting device in which a cathode, one or more organic material layers, and an anode are sequentially stacked on a substrate. For example, the structure of an organic light emitting device according to an embodiment of the present invention is illustrated in FIGS. 1 and 2.
  • Figure 1 shows an example of an organic light emitting device consisting of a substrate 1, an anode 2, a light emitting layer 3, and a cathode 4.
  • the compound represented by Formula 1 may be included in the light-emitting layer.
  • the organic light emitting device according to the present invention can be manufactured using materials and methods known in the art, except that at least one of the organic layers includes the compound represented by Formula 1 above. Additionally, when the organic light emitting device includes a plurality of organic material layers, the organic material layers may be formed of the same material or different materials.
  • the organic light emitting device can be manufactured by sequentially stacking an anode, an organic material layer, and a cathode on a substrate.
  • an anode is formed by depositing a metal or a conductive metal oxide or an alloy thereof on the substrate using a PVD (physical vapor deposition) method such as sputtering or e-beam evaporation. It can be manufactured by forming an organic material layer including a hole injection layer, a hole transport layer, a light emitting layer, and an electron transport layer thereon, and then depositing a material that can be used as a cathode thereon.
  • an organic light-emitting device can be made by sequentially depositing a cathode material, an organic material layer, and an anode material on a substrate.
  • the compound represented by Formula 1 may be formed as an organic layer by a solution coating method as well as a vacuum deposition method when manufacturing an organic light-emitting device.
  • the solution application method refers to spin coating, dip coating, doctor blading, inkjet printing, screen printing, spraying, roll coating, etc., but is not limited to these.
  • an organic light-emitting device can be manufactured by sequentially depositing a cathode material, an organic layer, and an anode material on a substrate (WO 2003/012890).
  • the manufacturing method is not limited to this.
  • the first electrode is an anode and the second electrode is a cathode, or the first electrode is a cathode and the second electrode is an anode.
  • the anode material is generally preferably a material with a large work function to facilitate hole injection into the organic layer.
  • Specific examples of the anode material include metals such as vanadium, chromium, copper, zinc, and gold, or alloys thereof; metal oxides such as zinc oxide, indium oxide, indium tin oxide (ITO), and indium zinc oxide (IZO); Combinations of metals and oxides such as ZnO:Al or SnO 2 :Sb; Conductive compounds such as poly(3-methylthiophene), poly[3,4-(ethylene-1,2-dioxy)thiophene](PEDOT), polypyrrole, and polyaniline are included, but are not limited to these.
  • the cathode material is generally preferably a material with a small work function to facilitate electron injection into the organic 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;
  • multi-layer structure materials such as LiF/Al or LiO 2 /Al, but they are not limited to these.
  • the hole injection layer is a layer that injects holes from an electrode.
  • the hole injection material has the ability to transport holes, has an excellent hole injection effect at the anode, a light-emitting layer or a light-emitting material, and has an excellent hole injection effect on the light-emitting layer or light-emitting material.
  • a compound that prevents movement of excitons to the electron injection layer or electron injection material and has excellent thin film forming ability is preferred. It is preferable that the highest occupied molecular orbital (HOMO) of the hole injection material is between the work function of the anode material and the HOMO of the surrounding organic material layer.
  • HOMO highest occupied molecular orbital
  • hole injection materials include metal porphyrin, oligothiophene, arylamine-based organic substances, hexanitrilehexaazatriphenylene-based organic substances, quinacridone-based organic substances, and perylene-based organic substances.
  • the hole transport layer is a layer that receives holes from the hole injection layer and transports holes to the light-emitting layer.
  • the hole transport material is a material that can receive holes from the anode or hole injection layer and transfer them to the light-emitting layer, and has high mobility for holes.
  • the material is suitable. Specific examples include arylamine-based organic materials, conductive compounds, and block copolymers with both conjugated and non-conjugated portions, but are not limited to these.
  • the light-emitting material is a material capable of emitting light in the visible range by receiving and combining holes and electrons from the hole transport layer and the electron transport layer, respectively, and is preferably a material with good quantum efficiency for fluorescence or phosphorescence.
  • Specific examples include 8-hydroxy-quinoline aluminum complex (Alq 3 ); Carbazole-based compounds; dimerized styryl compounds; BAlq; 10-hydroxybenzoquinoline-metal compound; Compounds of the benzoxazole, benzthiazole and benzimidazole series; Poly(p-phenylenevinylene) (PPV) series polymer; Spiro compounds; Polyfluorene, rubrene, etc., but are not limited to these.
  • the electron blocking layer is a layer placed between the hole transport layer and the light emitting layer to prevent electrons injected from the cathode from being recombined in the light emitting layer and passing to the hole transport layer, and is also called an electron blocking layer.
  • a material with lower electron affinity than the electron transport layer is preferred for the electron suppressing layer.
  • the compound represented by Formula 1 may be included as a material for the electron blocking layer.
  • the light emitting layer may include a host material and a dopant material.
  • a host material a compound represented by the above-mentioned formula (1) may be used.
  • host materials that can be used include condensed aromatic ring derivatives or heterocyclic ring-containing compounds.
  • condensed aromatic ring derivatives include anthracene derivatives, pyrene derivatives, naphthalene derivatives, pentacene derivatives, phenanthrene compounds, and fluoranthene compounds
  • heterocycle-containing compounds include carbazole derivatives, dibenzofuran derivatives, and ladder-type compounds. These include, but are not limited to, furan compounds and pyrimidine derivatives.
  • Dopant materials include aromatic amine derivatives, strylamine compounds, boron complexes, fluoranthene compounds, and metal complexes.
  • aromatic amine derivatives include condensed aromatic ring derivatives having a substituted or unsubstituted arylamino group, such as pyrene, anthracene, chrysene, and periplanthene
  • styrylamine compounds include substituted or unsubstituted arylamino groups.
  • substituents selected from the group consisting of aryl group, silyl group, alkyl group, cycloalkyl group, and arylamino group.
  • styrylamine, styryldiamine, styryltriamine, styryltetraamine, etc. are included, but are not limited thereto.
  • metal complexes include, but are not limited to, iridium complexes and platinum complexes.
  • the electron transport layer is a layer that receives electrons from the electron injection layer and transports electrons to the light-emitting layer.
  • the electron transport material is a material that can easily inject electrons from the cathode and transfer them to the light-emitting layer, and a material with high electron mobility is suitable. do. Specific examples include Al complex of 8-hydroxyquinoline; Complex containing Alq 3 ; organic radical compounds; Hydroxyflavone-metal complexes, etc., but are not limited to these.
  • the electron transport layer can be used with any desired cathode material as used according to the prior art.
  • suitable cathode materials are conventional materials with a low work function followed by an aluminum or silver layer. Specifically, cesium, barium, calcium, ytterbium and samarium, in each case followed by an aluminum layer or a silver layer.
  • the electron injection layer is a layer that injects electrons from the electrode, has the ability to transport electrons, has an excellent electron injection effect from the cathode, a light-emitting layer or a light-emitting material, and hole injection of excitons generated in the light-emitting layer.
  • a compound that prevents movement to the layer and has excellent thin film forming ability is preferred. Specifically, fluorenone, anthraquinodimethane, diphenoquinone, thiopyran dioxide, oxazole, oxadiazole, triazole, imidazole, perylenetetracarboxylic acid, preorenylidene methane, anthrone, etc. and their derivatives, metals. Complex compounds and nitrogen-containing five-membered ring derivatives are included, but are not limited thereto.
  • metal complex compounds 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-cresolato) gallium, bis(2-methyl-8-quinolinato)(1-naphtolato) aluminum, bis(2-methyl-8-quinolinato)(2-naphtolato) gallium, etc. It is not limited to this.
  • the “electron injection and transport layer” is a layer that performs the functions of both the electron injection layer and the electron transport layer.
  • the materials that play the role of each layer can be used singly or in combination, but are limited thereto. It doesn't work.
  • the compound represented by Formula 1 may be included as a material for the electron injection and transport layer.
  • the organic light-emitting device according to the present invention may be a bottom-emitting device, a top-emitting device, or a double-sided light-emitting device. In particular, it may be a bottom-emitting device that requires relatively high luminous efficiency.
  • the compound according to the present invention may be included in an organic solar cell or an organic transistor in addition to an organic light-emitting device.
  • Compound 2 was prepared using the same method as Preparation Example 1, except that Compound A-2 was used instead of Compound A-1.
  • a glass substrate coated with a thin film of ITO (Indium Tin Oxide) with a thickness of 1,400 ⁇ was placed in distilled water dissolved in detergent and washed with ultrasonic waves.
  • ITO Indium Tin Oxide
  • Decon TM CON705 from Fischer Co. was used as detergent, and distilled water filtered secondarily with a 0.22 ⁇ m sterilizing filter from Millipore Co. was used as distilled water.
  • ultrasonic washing was repeated twice with distilled water for 10 minutes.
  • the following compound HI-A and compound LG-101 were sequentially thermally vacuum deposited to a thickness of 800 ⁇ and 50 ⁇ , respectively, to form a hole injection layer.
  • the following compound HT-A was vacuum deposited to a thickness of 800 ⁇ as a hole transport layer
  • the following compound EB-A was thermally vacuum deposited to a thickness of 600 ⁇ as an electron blocking layer.
  • the following compound ET-A and compound Liq were thermally vacuum deposited at a ratio of 1:1 to a thickness of 360 ⁇ , and then the following compound Liq was vacuum deposited to a thickness of 5 ⁇ .
  • magnesium and silver were sequentially deposited at a ratio of 10:1 to a thickness of 220 ⁇ , and aluminum was deposited to a thickness of 1000 ⁇ to form a cathode.
  • the deposition rate of organic materials was maintained at 0.4 ⁇ /sec to 0.7 ⁇ /sec
  • the deposition rate of lithium fluoride of the cathode was maintained at 0.3 ⁇ /sec
  • aluminum was maintained at 2 ⁇ /sec
  • the vacuum level during deposition was
  • An organic light emitting device was manufactured by maintaining 2x10 -7 to 5x10 -6 torr.
  • An organic light-emitting device was manufactured in the same manner as Example 1, except that the compounds listed in Table 1 below were used instead of Compound 1 and pRH-1 of Preparation Example 1.
  • the structures of comparative compounds nRH-1, nRH-2, and nRH-3 are as follows.
  • Substrate 2 Anode
  • Electron blocking layer 8 Electron injection and transport layer

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Abstract

La présente invention concerne un nouveau composé et un dispositif électroluminescent organique le comprenant.
PCT/KR2023/005465 2022-04-22 2023-04-21 Nouveau composé et dispositif électroluminescent organique le comprenant WO2023204668A1 (fr)

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KR20140094408A (ko) * 2013-01-22 2014-07-30 덕산하이메탈(주) 유기전기 소자용 화합물, 이를 이용한 유기전기소자 및 그 전자 장치
CN110878088A (zh) * 2018-09-06 2020-03-13 北京鼎材科技有限公司 一种化合物及其应用
CN113429395A (zh) * 2021-07-27 2021-09-24 北京八亿时空液晶科技股份有限公司 咪唑衍生物、有机电致发光材料、发光元件及消费型产品
CN113582997A (zh) * 2021-06-18 2021-11-02 陕西莱特迈思光电材料有限公司 含氮化合物及电子元件和电子装置
CN114075185A (zh) * 2021-01-28 2022-02-22 陕西莱特光电材料股份有限公司 一种含氮化合物及包含其的电子元件和电子装置

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KR100430549B1 (ko) 1999-01-27 2004-05-10 주식회사 엘지화학 신규한 착물 및 그의 제조 방법과 이를 이용한 유기 발광 소자 및 그의 제조 방법

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KR20140094408A (ko) * 2013-01-22 2014-07-30 덕산하이메탈(주) 유기전기 소자용 화합물, 이를 이용한 유기전기소자 및 그 전자 장치
CN110878088A (zh) * 2018-09-06 2020-03-13 北京鼎材科技有限公司 一种化合物及其应用
CN114075185A (zh) * 2021-01-28 2022-02-22 陕西莱特光电材料股份有限公司 一种含氮化合物及包含其的电子元件和电子装置
CN113582997A (zh) * 2021-06-18 2021-11-02 陕西莱特迈思光电材料有限公司 含氮化合物及电子元件和电子装置
CN113429395A (zh) * 2021-07-27 2021-09-24 北京八亿时空液晶科技股份有限公司 咪唑衍生物、有机电致发光材料、发光元件及消费型产品

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