WO2023008779A1 - 유기 발광 소자 - Google Patents
유기 발광 소자 Download PDFInfo
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- WO2023008779A1 WO2023008779A1 PCT/KR2022/010101 KR2022010101W WO2023008779A1 WO 2023008779 A1 WO2023008779 A1 WO 2023008779A1 KR 2022010101 W KR2022010101 W KR 2022010101W WO 2023008779 A1 WO2023008779 A1 WO 2023008779A1
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- 150000001875 compounds Chemical class 0.000 claims description 106
- -1 biphenylyl Chemical group 0.000 claims description 65
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- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims description 18
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 17
- 229910052760 oxygen Inorganic materials 0.000 claims description 15
- 125000000217 alkyl group Chemical group 0.000 claims description 13
- 229910052717 sulfur Inorganic materials 0.000 claims description 13
- 229910052805 deuterium Inorganic materials 0.000 claims description 12
- 229910052739 hydrogen Inorganic materials 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 claims description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- 125000006819 (C2-60) heteroaryl group Chemical group 0.000 claims description 6
- 125000001072 heteroaryl group Chemical group 0.000 claims description 5
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- 125000005509 dibenzothiophenyl group Chemical group 0.000 claims description 4
- 125000004431 deuterium atom Chemical group 0.000 claims description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
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- 125000003277 amino group Chemical group 0.000 description 5
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- SAHIZENKTPRYSN-UHFFFAOYSA-N [2-[3-(phenoxymethyl)phenoxy]-6-(trifluoromethyl)pyridin-4-yl]methanamine Chemical compound O(C1=CC=CC=C1)CC=1C=C(OC2=NC(=CC(=C2)CN)C(F)(F)F)C=CC=1 SAHIZENKTPRYSN-UHFFFAOYSA-N 0.000 description 4
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical group C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 description 3
- 125000002877 alkyl aryl group Chemical group 0.000 description 3
- 125000003710 aryl alkyl group Chemical group 0.000 description 3
- 125000001769 aryl amino group Chemical group 0.000 description 3
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- 238000004770 highest occupied molecular orbital Methods 0.000 description 3
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- MPIJGSAWPMMKMU-UHFFFAOYSA-N 2-chloro-4-dibenzofuran-3-yl-6-phenyl-1,3,5-triazine Chemical compound ClC1=NC(=NC(=N1)C=1C=CC2=C(OC3=C2C=CC=C3)C=1)C1=CC=CC=C1 MPIJGSAWPMMKMU-UHFFFAOYSA-N 0.000 description 2
- MOCNGNGLTRMQQH-UHFFFAOYSA-N 3-bromo-9-(4-phenylphenyl)carbazole Chemical compound C12=CC=CC=C2C2=CC(Br)=CC=C2N1C(C=C1)=CC=C1C1=CC=CC=C1 MOCNGNGLTRMQQH-UHFFFAOYSA-N 0.000 description 2
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- UBASCOPZFCGGAV-UHFFFAOYSA-N 9-phenyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)carbazole Chemical compound O1C(C)(C)C(C)(C)OB1C1=CC=C(N(C=2C=CC=CC=2)C=2C3=CC=CC=2)C3=C1 UBASCOPZFCGGAV-UHFFFAOYSA-N 0.000 description 2
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- 229940126062 Compound A Drugs 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 2
- NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 2
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 2
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- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 1
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- CRJISNQTZDMKQD-UHFFFAOYSA-N 2-bromodibenzofuran Chemical compound C1=CC=C2C3=CC(Br)=CC=C3OC2=C1 CRJISNQTZDMKQD-UHFFFAOYSA-N 0.000 description 1
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- 125000006176 2-ethylbutyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(C([H])([H])*)C([H])([H])C([H])([H])[H] 0.000 description 1
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- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
- HTPBWAPZAJWXKY-UHFFFAOYSA-L zinc;quinolin-8-olate Chemical compound [Zn+2].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 HTPBWAPZAJWXKY-UHFFFAOYSA-L 0.000 description 1
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- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
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Definitions
- the present invention relates to an organic light emitting diode having improved driving voltage, efficiency and lifetime.
- an organic light emitting phenomenon refers to a phenomenon in which electrical energy is converted into light energy using an organic material.
- An organic light emitting device using an organic light emitting phenomenon has a wide viewing angle, excellent contrast, and a fast response time, and has excellent luminance, driving voltage, and response speed characteristics, and thus many studies are being conducted.
- An organic light emitting device generally has 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-layered structure composed of different materials, and may include, 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 is applied between the two electrodes, holes are injected from the anode and electrons from the cathode are injected into the organic material layer, and when the injected holes and electrons meet, excitons are formed. When it falls back to the ground state, it glows.
- Patent Document 1 Korean Patent Publication No. 10-2000-0051826
- the present invention relates to an organic light emitting diode having improved driving voltage, efficiency and lifetime.
- the present invention provides the following organic light emitting device:
- the light emitting layer includes an organic compound of a compound represented by Formula 1 and a compound represented by Formula 2 below.
- X 1 , X 2 and X 3 are each independently CH or N, but at least one of X 1 , X 2 and X 3 is N,
- Ar 1 and Ar 2 are each independently a substituted or unsubstituted C 6-60 aryl; Or a C 2-60 heteroaryl containing at least one selected from the group consisting of substituted or unsubstituted N, O and S,
- Y is O, S, or CRR'
- R and R' are each independently a substituted or unsubstituted C 1-60 alkyl
- R 1 is hydrogen; heavy hydrogen; Substituted or unsubstituted C 6-60 aryl; Or a C 2-60 heteroaryl containing at least one selected from the group consisting of substituted or unsubstituted N, O and S,
- n1 is an integer from 1 to 10;
- Ar 3 and Ar 4 are each independently a substituted or unsubstituted C 6-12 aryl; Or a C 2-12 heteroaryl containing at least one selected from the group consisting of substituted or unsubstituted N, O and S,
- R 2 and R 3 are each independently hydrogen; heavy hydrogen; Substituted or unsubstituted C 6-60 aryl; Or a C 2-60 heteroaryl containing at least one selected from the group consisting of substituted or unsubstituted N, O and S,
- At least one of Ar 3 and Ar 4 is substituted with one or more deuterium or at least one of R 2 and R 3 is deuterium;
- n2 and n3 are each independently an integer of 1 to 7.
- the above-described organic light emitting device includes organic alloys of the compound represented by Formula 1 and the compound represented by Formula 2 in the light emitting layer, thereby improving efficiency, low driving voltage and/or lifespan characteristics of the organic light emitting device.
- FIG. 1 shows an example of an organic light emitting device composed 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 7, a light emitting layer 3, a hole blocking layer 8, and an electron transport layer 9 ,
- An example of an organic light emitting device composed of an electron injection layer 10 and a cathode 4 is shown.
- substituted or unsubstituted means deuterium; halogen group; nitrile group; nitro group; hydroxy group; carbonyl group; ester group; imide group; amino group; phosphine oxide group; alkoxy group; aryloxy group; Alkyl thioxy group; Arylthioxy group; an alkyl sulfoxy group; aryl sulfoxy group; silyl group; boron group; an alkyl group; cycloalkyl group; alkenyl group; aryl group; aralkyl group; Aralkenyl group; Alkyl aryl 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 a heterocyclic group containing at least one of N, O, and S atoms, or substituted or unsub
- a substituent in which two or more substituents are connected may be a biphenyl group. That is, the biphenyl group may be an aryl group, and may be interpreted as a substituent in which two phenyl groups are connected.
- the number of carbon atoms of the carbonyl group is not particularly limited, but is preferably 1 to 40 carbon atoms. Specifically, it may be a substituent having the following structure, but is not limited thereto.
- the ester group may be substituted with an aryl group having 6 to 25 carbon atoms or a straight-chain, branched-chain or cyclic chain alkyl group having 1 to 25 carbon atoms in the ester group. Specifically, it may be a substituent of the following structural formula, but is not limited thereto.
- the number of carbon atoms of the imide group is not particularly limited, but is preferably 1 to 25 carbon atoms. Specifically, it may be a substituent having the following structure, but is not limited thereto.
- the silyl group is specifically 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 not limited to
- the boron group specifically includes a trimethyl boron group, a triethyl boron group, a t-butyldimethyl boron group, a triphenyl boron group, a phenyl boron group, but is not limited thereto.
- examples of the halogen group include fluorine, chlorine, bromine or iodine.
- the alkyl group may be straight-chain or branched-chain, and the number of carbon atoms is not particularly limited, but is preferably 1 to 40. According to one embodiment, the number of carbon atoms of the alkyl group is 1 to 20. According to another exemplary embodiment, the number of carbon atoms of the alkyl group is 1 to 10. According to another exemplary embodiment, the alkyl group has 1 to 6 carbon atoms.
- 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, cyclopentylmethyl, cyclohexylmethyl, octyl, n-octyl, tert-octyl, 1-methylheptyl, 2-ethylhexyl
- 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 one embodiment, the alkenyl group has 2 to 20 carbon atoms. According to another exemplary embodiment, the alkenyl group has 2 to 10 carbon atoms. 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, etc., 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 number of carbon atoms of the cycloalkyl group is 3 to 20. According to another exemplary embodiment, the number of carbon atoms of the cycloalkyl group is 3 to 6.
- 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 number of carbon atoms of the aryl group is 6 to 30. According to one embodiment, the number of carbon atoms of the aryl group is 6 to 20.
- the aryl group may be a phenyl group, a biphenyl group, a terphenyl group, etc. as a monocyclic aryl group, but is not limited thereto.
- the polycyclic aryl group may be a naphthyl group, anthracenyl group, phenanthryl group, pyrenyl group, perylenyl group, chrysenyl group, fluorenyl group, and the like, but is not limited thereto.
- the fluorenyl group may be substituted, and two substituents may be bonded to each other to form a spiro structure.
- the fluorenyl group is substituted, etc.
- it is not limited thereto.
- the heterocyclic group is a heterocyclic group containing at least one of O, N, Si, and S as heterogeneous elements, and the number of carbon atoms is not particularly limited, but preferably has 2 to 60 carbon atoms.
- the heterocyclic group include a thiophene group, a furan group, a pyrrole group, an imidazole group, a thiazole group, an oxazole group, an oxadiazole group, a triazole group, a pyridyl group, a bipyridyl group, a pyrimidyl group, a triazine group, and an acridyl group.
- pyridazine group pyrazinyl group, quinolinyl group, quinazoline group, quinoxalinyl group, phthalazinyl group, pyridopyrimidinyl group, pyridopyrazinyl group, pyrazinopyrazinyl group, isoquinoline group, indole group , carbazole group, benzoxazole group, benzoimidazole group, benzothiazole group, benzocarbazole group, benzothiophene group, dibenzothiophene group, benzofuranyl group, phenanthroline group, isoxazolyl group, thiadia A zolyl group, a phenothiazinyl group, and a dibenzofuranyl group, but are not limited thereto.
- an aralkyl group, an aralkenyl group, an alkylaryl group, and an aryl group among arylamine groups are the same as the examples of the aryl group described above.
- the alkyl group among the aralkyl group, the alkylaryl group, and the alkylamine group is the same as the examples of the above-mentioned alkyl group.
- the description of the heterocyclic group described above may be applied to the heteroaryl of the heteroarylamine.
- the alkenyl group among the aralkenyl groups is the same as the examples of the alkenyl group described above.
- the description of the aryl group described above may be applied except that the arylene is a divalent group.
- the description of the heterocyclic group described above may be applied except that the heteroarylene is a divalent group.
- the hydrocarbon ring is not a monovalent group, and the description of the aryl group or cycloalkyl group described above may be applied, except that the hydrocarbon ring is formed by combining two substituents.
- the heterocyclic group is not a monovalent group, and the description of the above-described heterocyclic group may be applied, except that it is formed by combining two substituents.
- organic alloy is a product obtained by pre-treatment of two or more single organic compounds, and the chemical interaction (chemical interaction) between the single organic compounds by the pre-treatment interaction) can have.
- the pretreatment may be, for example, cooling after heat treatment such as heating and sublimation, but is not limited thereto.
- An anode and a cathode used in the present invention refer to electrodes used in an organic light emitting device.
- the cathode material a material having a high work function is generally preferred so that holes can be smoothly injected into the organic layer.
- the cathode 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 polymers such as poly(3-methylthiophene), poly[3,4-(ethylene-1,2-dioxy)thiophene] (PEDOT), polypyrrole, and polyaniline, but are not limited thereto.
- the cathode material is preferably a material having a small work function so as to easily inject electrons into the organic material layer.
- Specific examples of the anode material include metals such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin, and lead, or alloys thereof; There are multi-layered materials such as LiF/Al or LiO 2 /Al, but are not limited thereto.
- the organic light emitting device according to the present invention may further include a hole injection layer on the anode, if necessary.
- the hole injection layer is a layer for injecting holes from the electrode, and the hole injection material has the ability to transport holes and has a hole injection effect at the anode, an excellent hole injection effect for the light emitting layer or the light emitting material, and generated in the light emitting layer A compound that prevents migration of excitons to the electron injecting layer or electron injecting material and has excellent thin film formation ability is preferred.
- 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 layer.
- the hole injection material include metal porphyrins, oligothiophenes, arylamine-based organic materials, hexanitrilehexaazatriphenylene-based organic materials, quinacridone-based organic materials, and perylene-based organic materials. of organic materials, anthraquinone, polyaniline, and polythiophene-based conductive polymers, but are not limited thereto.
- the organic light emitting device may include a hole transport layer on the anode (or on the hole injection layer if the hole injection layer exists), if necessary.
- the hole transport layer is a layer that receives holes from the anode or the hole injection layer and transports the holes to the light emitting layer.
- a hole transport material it is a material that receives holes from the anode or the hole injection layer and transfers them to the light emitting layer, and has hole mobility. Larger materials are suitable.
- hole transport material examples include, but are not limited to, arylamine-based organic materials, conductive polymers, and block copolymers having both conjugated and non-conjugated parts.
- the organic light emitting device may include an electron blocking layer on the hole transport layer, if necessary.
- 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 passing to the hole transport layer without recombination in the light emitting layer, and is also called an electron blocking layer.
- a material having a smaller electron affinity than the electron transport layer is preferable for the electron blocking layer.
- the light emitting layer used in the present invention means a layer capable of emitting light in the visible ray region by combining holes and electrons transferred from the anode and the cathode.
- the light emitting layer includes a host material and a dopant material, and in the present invention, an organic compound obtained by pre-treating the compound represented by Chemical Formula 1 and the compound represented by Chemical Formula 2 may be used as a host.
- Ar 1 can be substituted or unsubstituted C 6-20 aryl, more preferably, Ar 1 can be phenyl, biphenylyl, terphenylyl, or phenyl substituted with 5 deuterium atoms. . Most preferably, Ar 1 may be any one selected from the group consisting of:
- Ar 2 may be substituted or unsubstituted C 6-20 aryl, more preferably, Ar 2 may be phenyl or biphenylyl. Most preferably, Ar 2 is phenyl or can be
- R and R' may each independently be a substituted or unsubstituted C 1-10 alkyl, more preferably, R and R' may each be methyl.
- R 1 is hydrogen; heavy hydrogen; Substituted or unsubstituted C 6-20 aryl; Or it may be a C 2-20 heteroaryl containing at least one selected from the group consisting of substituted or unsubstituted N, O and S. More preferably, R 1 can be hydrogen or deuterium.
- the compound represented by Formula 1 can be prepared by, for example, a manufacturing method such as the following Reaction Scheme 1, and other compounds can be prepared similarly.
- X 1 , X 2 , X 3 , Ar 1 , Ar 2 , R 1 and n1 are as defined in Formula 1, Z 1 is halogen, preferably Z 1 is chloro or bromo .
- Reaction Scheme 1 is an amine substitution reaction, which is preferably carried out in the presence of a palladium catalyst and a base, and the reactor for the amine substitution reaction can be changed as known in the art.
- the manufacturing method may be more specific in Preparation Examples to be described later.
- the compound represented by Formula 2 may be represented by Formula 2-1:
- Ar 3 , Ar 4 , R 2 , R 3 , n2 and n3 are as defined in Chemical Formula 2 above.
- Ar 3 and Ar 4 may each independently be phenyl, biphenylyl, naphthyl, dimethylfluorenyl, dibenzofuranyl, or dibenzothiophenyl, and the phenyl, biphenylyl, naphthyl Tyl, dimethylfluorenyl, dibenzofuranyl, or dibenzothiophenyl may be unsubstituted or substituted with deuterium (D).
- D deuterium
- R 2 and R 3 are each independently hydrogen; heavy hydrogen; Substituted or unsubstituted C 6-20 aryl; Or it may be a C 2-20 heteroaryl containing at least one selected from the group consisting of substituted or unsubstituted N, O and S. More preferably, R 2 and R 3 may each independently be hydrogen, deuterium, or phenyl, and the phenyl may be unsubstituted or substituted with 1 to 5 deuterium atoms.
- a + b + c + d is 1 to 24;
- a + b + c + d + e is 1 to 28;
- a + b + c + d + e + f is 1 to 32;
- a + b + c + d + e is 1 to 30;
- a + b + c + d is 1 to 26;
- a + b + c + d + e is 1 to 30;
- a + b + c + d + e + f is 1 to 32;
- a + b + c + d is 1 to 32;
- a + b + c + d + e is 1 to 36.
- the compound represented by Chemical Formula 2 can be prepared, for example, by a manufacturing method such as the following Reaction Scheme 2, and other compounds can be prepared similarly.
- Ar 3 , Ar 4 , R 2 , R 3 , n2 and n3 are as defined in Formula 2, Z 2 is halogen, preferably Z 2 is chloro or bromo.
- Reaction Scheme 2 is an amine substitution reaction, which is preferably carried out in the presence of a palladium catalyst and a base, and the reactor for the amine substitution reaction can be changed as known in the art.
- the manufacturing method may be more specific in Preparation Examples to be described later.
- the weight ratio of the compound represented by Formula 1 and the compound represented by Formula 2 in the organic alloy is 10:90 to 90:10, more preferably 20:80 to 80:20, 30: 70 to 70:30 or 40:60 to 60:40.
- the light emitting layer may further include a dopant in addition to a host.
- the dopant material is not particularly limited as long as it is a material used in an organic light emitting device.
- aromatic amine derivatives are condensed aromatic ring derivatives having a substituted or unsubstituted arylamino group, such as pyrene, anthracene, chrysene, periplanthene, etc.
- styrylamine compounds include substituted or unsubstituted arylamine is substituted with at least one arylvinyl group, wherein one or two or more substituents selected from the group consisting of an aryl group, a silyl group, an alkyl group, a cycloalkyl group, and an arylamino group are substituted or unsubstituted.
- substituents selected from the group consisting of an aryl group, a silyl group, an alkyl group, a cycloalkyl group, and an arylamino group are substituted or unsubstituted.
- metal complexes include, but are not limited to, iridium complexes and platinum complexes.
- the organic light emitting device may include a hole blocking layer on the light emitting layer, if necessary.
- the hole blocking layer is a layer placed between the electron transport layer and the light emitting layer to prevent holes injected from the anode from passing to the electron transport layer without recombination in the light emitting layer, and is also called a hole blocking layer.
- a material having high ionization energy is preferred for the hole-blocking layer.
- the organic light emitting device may include an electron transport layer on the light emitting layer, if necessary.
- the electron transport layer is a layer that receives electrons from the cathode or an electron injection layer formed on the cathode, transports electrons to the light emitting layer, and suppresses the transfer of holes in the light emitting layer.
- an electron transport material electrons are well injected from the cathode.
- a material that can be received and transferred to the light emitting layer a material having high electron mobility is suitable.
- the electron transport material include Al complexes of 8-hydroxyquinoline; Complexes containing Alq 3 ; organic radical compounds; hydroxyflavone-metal complexes and the like, but are not limited thereto.
- 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 having a low work function followed by a layer of aluminum or silver. Specifically cesium, barium, calcium, ytterbium and samarium, followed in each case by a layer of aluminum or silver.
- the organic light emitting device may further include an electron injection layer on the light emitting layer (or on the electron transport layer when the electron transport layer is present), if necessary.
- the electron injection layer is a layer for injecting electrons from an electrode, has the ability to transport electrons, has an excellent electron injection effect from a cathode, an excellent electron injection effect for a light emitting layer or a light emitting material, and injects holes of excitons generated in the light emitting layer. It is preferable to use a compound that prevents migration to a layer and has excellent thin film forming ability.
- materials that can be used as the electron injection layer include fluorenone, anthraquinodimethane, diphenoquinone, thiopyran dioxide, oxazole, oxadiazole, triazole, imidazole, perylenetetracarboxylic acid, preore nylidene methane, anthrone, etc. and their derivatives, metal complex compounds, nitrogen-containing 5-membered ring derivatives, etc., but are not limited thereto.
- Examples of the metal complex compound 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)( There are o-cresolato) gallium, bis(2-methyl-8-quinolinato)(1-naphtolato)aluminum, and bis(2-methyl-8-quinolinato)(2-naphtolato)gallium. Not limited to this.
- FIGS. 1 and 2 The structure of the organic light emitting device according to the present invention is illustrated in FIGS. 1 and 2 .
- 1 shows an example of an organic light emitting device composed of a substrate 1, an anode 2, a light emitting layer 3, and a cathode 4.
- 2 shows a substrate 1, an anode 2, a hole injection layer 5, a hole transport layer 6, an electron blocking layer 7, a light emitting layer 3, a hole blocking layer 8, and an electron transport layer 9
- An example of an organic light emitting device composed of an electron injection layer 10 and a cathode 4 is shown.
- the organic light emitting device according to the present invention can be manufactured by sequentially stacking the above-described components. At this time, by using a physical vapor deposition (PVD) method such as sputtering or e-beam evaporation, depositing a metal or a metal oxide having conductivity or an alloy thereof on the substrate to form an anode And, after forming each of the above-described layers thereon, it can be manufactured by depositing a material that can be used as a cathode thereon.
- PVD physical vapor deposition
- an organic light emitting device may be manufactured by sequentially depositing a cathode material on a substrate to an anode material in the reverse order of the above configuration (WO 2003/012890).
- the light emitting layer may be formed by a solution coating method as well as a vacuum deposition method of a host and a dopant.
- the solution coating method means spin coating, dip coating, doctor blading, inkjet printing, screen printing, spraying, roll coating, etc., but is not limited to these.
- the organic light emitting device according to the present invention may be a bottom emission device, a top emission device, or a double-sided light emitting device, and in particular, may be a bottom emission device requiring relatively high light emitting efficiency.
- compound 2-2-a (15.0 g, 36.7 mmol) and 9-([1,1'-biphenyl]-2-yl)-3-(4,4,5,5-tetramethyl-1,3 ,2-dioxaborolan-2-yl)-9H-carbazole (18.0 g, 40.4 mmol) was added to 300 ml of THF and stirred and refluxed. Thereafter, potassium carbonate (20.3 g, 146.9 mmol) was dissolved in 61 ml of water, and after stirring sufficiently, tetrakis (triphenylphosphine) palladium (0) (1.3 g, 1.1 mmol) was added.
- compound 2-3-b (15.0 g, 36.7 mmol) and 2-bromo-9,9-dimethyl-9H-fluorene (11.0 g, 40.4 mmol) were added to 300 ml of toluene, stirred and refluxed. After that, sodium tert-butoxide (5.3 g, 55.1 mmol) and bis(tri-tert-butylphosphine)palladium(0) (0.6 g, 1.1 mmol) were added. After reacting for 6 hours, the mixture was cooled to room temperature, and the organic layer was separated using chloroform and water, and then the organic layer was distilled.
- compound 2-4-a (15.0 g, 36.3 mmol) and 2-bromodibenzo[b,d]furan (9.9 g, 39.9 mmol) were added to 300 ml of toluene, stirred and refluxed. After that, sodium tert-butoxide (5.2 g, 54.4 mmol) and bis (tri-tert-butylphosphine) palladium (0) (0.6 g, 1.1 mmol) were added. After reacting for 11 hours, the mixture was cooled to room temperature, and the organic layer was separated using chloroform and water, and then the organic layer was distilled.
- compound 1-1 and compound 2-1 were mixed at a weight ratio of 40:60, and the two mixtures were melted by raising the temperature under a pressure of 10 -2 Torr or less, and then cooled to room temperature after 1 hour to obtain a solid product. This product was ground in a mixer to obtain organic compound 1 in powder form.
- Organic alloys 2 to 5 and organic alloys A to D were prepared in the same manner as in Preparation Example 2-1, except that the materials to be mixed were changed as shown in Table 1 below.
- Compounds A-1, A-2, B-1 and B-2 in Table 1 are as follows.
- a glass substrate coated with ITO (Indium Tin Oxide) to a thickness of 1400 ⁇ was put in distilled water in which detergent was dissolved and washed with ultrasonic waves.
- a Fischer Co. product was used as the detergent, and distilled water filtered through a second filter of a Millipore Co. product was used as the distilled water.
- ultrasonic cleaning was performed twice with distilled water for 10 minutes.
- ultrasonic cleaning was performed with solvents such as isopropyl alcohol, acetone, and methanol, dried, and transported to a plasma cleaner.
- solvents such as isopropyl alcohol, acetone, and methanol
- the compound HT-A and 5% by weight of the compound PD were thermally vacuum deposited to a thickness of 100 ⁇ to form a hole injection layer, and then only the compound HT-A of 1150 ⁇ A hole transport layer was formed by depositing it in a thickness.
- the following compound HT-B was thermally vacuum deposited to a thickness of 450 ⁇ .
- the organic alloy 1 prepared in Preparation Example 2-1 as a host material and the following compound GD as a dopant material were vacuum deposited at a weight ratio of 92:8 on the electron blocking layer to a thickness of 350 ⁇ to form a light emitting layer. .
- the following compound ET-A was vacuum deposited to a thickness of 50 ⁇ .
- the following compound ET-B and the following compound Liq were thermally vacuum-deposited to a thickness of 300 ⁇ at a weight ratio of 1:1 as an electron transport layer, and then Yb was vacuum-deposited to a thickness of 10 ⁇ as an electron injection layer.
- An organic light emitting device was manufactured by depositing magnesium and silver to a thickness of 150 ⁇ at a weight ratio of 1:4 on the electron injection layer to form a cathode.
- the deposition rate of organic materials was maintained at 0.4 ⁇ 0.7 ⁇ / sec
- the deposition rate of magnesium and silver was maintained at 2 ⁇ / sec
- the vacuum degree during deposition was 2 * 10 -7 ⁇ 5 * 10 -6 torr. Maintained, an organic light emitting device was produced.
- the organic light emitting devices manufactured in Examples 1 to 5 and Comparative Examples 1-1 to 3-4 were heat-treated in an oven at 120 ° C. for 30 minutes, then taken out, and a current was applied to determine the voltage, efficiency, and lifetime (T95). was measured and the results are shown in Table 2 below. At this time, the voltage and efficiency were measured by applying a current density of 10 mA/cm 2 , and T95 denotes the time (hr) until the initial luminance decreases to 95% at a current density of 20 mA/cm 2 .
- substrate 2 anode
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Abstract
Description
제조예 | 유기합화물 | 혼합재료1 | 혼합재료2 | 혼합 비율(중량비) |
제조예 2-1 | 유기합화물 1 | 화합물 1-1 | 화합물 2-1 | 40:60 |
제조예 2-2 | 유기합화물 2 | 화합물 1-2 | 화합물 2-2 | 40:60 |
제조예 2-3 | 유기합화물 3 | 화합물 1-2 | 화합물 2-3 | 40:60 |
제조예 2-4 | 유기합화물 4 | 화합물 1-3 | 화합물 2-4 | 40:60 |
제조예 2-5 | 유기합화물 5 | 화합물 1-4 | 화합물 2-1 | 40:60 |
제조예 2-A | 유기합화물 A | 화합물 A-1 | 화합물 2-1 | 40:60 |
제조예 2-B | 유기합화물 B | 화합물 A-2 | 화합물 2-1 | 40:60 |
제조예 2-C | 유기합화물 C | 화합물 1-1 | 화합물 B-1 | 40:60 |
제조예 2-D | 유기합화물 D | 화합물 1-4 | 화합물 B-2 | 40:60 |
호스트 물질 | @ 10 mA/cm2 | @ 20 mA/cm2 | ||
전압 (V) | 효율 (cd/A) | 수명 (T95, hr) | ||
실시예 1 | 유기합화물 1 | 4.08 | 73.9 | 159 |
실시예 2 | 유기합화물 2 | 4.07 | 72.6 | 159 |
실시예 3 | 유기합화물 3 | 4.01 | 74.2 | 162 |
실시예 4 | 유기합화물 4 | 4.03 | 73.6 | 153 |
실시예 5 | 유기합화물 5 | 4.08 | 72.9 | 170 |
비교예 1-1 | 유기합화물 A | 5.16 | 56.3 | 60 |
비교예 1-2 | 유기합화물 B | 4.56 | 61.0 | 72 |
비교예 1-3 | 유기합화물 C | 4.98 | 54.1 | 83 |
비교예 1-4 | 유기합화물 D | 4.83 | 65.4 | 93 |
비교예 2-1 | 화합물 1-1:화합물 2-1=40:60 중량비의 단순 혼합물 | 4.12 | 69.7 | 102 |
비교예 2-2 | 화합물 1-2:화합물 2-2=40:60 중량비의 단순 혼합물 | 4.13 | 68.2 | 94 |
비교예 2-3 | 화합물 1-3:화합물 2-3=40:60 중량비의 단순 혼합물 | 4.09 | 68.3 | 113 |
비교예 2-4 | 화합물 1-3:화합물 2-4=40:60 중량비의 단순 혼합물 | 4.08 | 70.4 | 108 |
비교예 2-5 | 화합물 1-4:화합물 2-1=40:60 중량비의 단순 혼합물 | 4.12 | 68.2 | 109 |
비교예 3-1 | 화합물 A-1:화합물 2-1=40:60 중량비의 단순 혼합물 | 5.18 | 55.6 | 57 |
비교예 3-2 | 화합물 A-2:화합물 2-1=40:60 중량비의 단순 혼합물 | 4.58 | 60.7 | 69 |
비교예 3-3 | 화합물 1-1:화합물 B-1=40:60 중량비의 단순 혼합물 | 5.01 | 53.6 | 80 |
비교예 3-4 | 화합물 1-4:화합물 B-2=40:60 중량비의 단순 혼합물 | 4.89 | 64.2 | 88 |
Claims (10)
- 양극;음극; 및상기 양극과 음극 사이의 발광층을 포함하고,상기 발광층은 하기 화학식 1로 표시되는 화합물 및 하기 화학식 2로 표시되는 화합물의 유기합화물을 포함하는,유기 발광 소자:[화학식 1]상기 화학식 1에서,X1, X2 및 X3는 각각 독립적으로 CH 또는 N이되, X1, X2 및 X3 중 적어도 하나는 N이고,Ar1 및 Ar2는 각각 독립적으로, 치환 또는 비치환된 C6-60 아릴; 또는 치환 또는 비치환된 N, O 및 S로 구성되는 군으로부터 선택되는 어느 하나 이상을 포함하는 C2-60 헤테로아릴이고,Y는 O, S, 또는 CRR'이고,여기서 R 및 R'는 각각 독립적으로, 치환 또는 비치환된 C1-60 알킬이고,R1은 수소; 중수소; 치환 또는 비치환된 C6-60 아릴; 또는 치환 또는 비치환된 N, O 및 S로 구성되는 군으로부터 선택되는 어느 하나 이상을 포함하는 C2-60 헤테로아릴이고,n1은 1 내지 10의 정수이고,[화학식 2]상기 화학식 2에서,Ar3 및 Ar4는 각각 독립적으로, 치환 또는 비치환된 C6-12 아릴; 또는 치환 또는 비치환된 N, O 및 S로 구성되는 군으로부터 선택되는 어느 하나 이상을 포함하는 C2-12 헤테로아릴이고,R2 및 R3는 각각 독립적으로, 수소; 중수소; 치환 또는 비치환된 C6-60 아릴; 또는 치환 또는 비치환된 N, O 및 S로 구성되는 군으로부터 선택되는 어느 하나 이상을 포함하는 C2-60 헤테로아릴이되,Ar3 및 Ar4 중 적어도 하나는 1개 이상의 중수소로 치환되거나 R2 및 R3 중 적어도 하나는 중수소이고,n2 및 n3는 각각 독립적으로, 1 내지 7의 정수이다.
- 제1항에 있어서,Ar1은 페닐, 비페닐릴, 터페닐릴, 또는 5개의 중수소로 치환된 페닐인,유기 발광 소자.
- 제1항에 있어서,Ar2는 페닐, 또는 비페닐릴인,유기 발광 소자.
- 제1항에 있어서,R 및 R'는 각각 메틸인,유기 발광 소자.
- 제1항에 있어서,R1은 수소 또는 중수소인,유기 발광 소자.
- 제1항에 있어서,Ar3 및 Ar4는 각각 독립적으로, 페닐, 비페닐릴, 나프틸, 디메틸플루오레닐, 디벤조퓨라닐, 또는 디벤조티오페닐이고,상기 페닐, 비페닐릴, 나프틸, 디메틸플루오레닐, 디벤조퓨라닐, 또는 디벤조티오페닐은 비치환되거나 중수소로 치환된,유기 발광 소자.
- 제1항에 있어서,R2 및 R3는 각각 독립적으로, 수소, 중수소, 또는 페닐이고,상기 페닐은 비치환되거나 1 개 내지 5 개의 중수소로 치환된,유기 발광 소자.
- 제1항에 있어서,상기 화학식 2로 표시되는 화합물은 하기로 구성되는 군으로부터 선택되는 어느 하나인,유기 발광 소자:상기 화합물에서,a + b + c + d는 1 내지 24이고,상기 군에서,a + b + c + d + e는 1 내지 28이고,상기 군에서,a + b + c + d + e + f는 1 내지 32이고,상기 군에서,a + b + c + d + e는 1 내지 30이고,상기 군에서,a + b + c + d는 1 내지 26이고,상기 군에서,a + b + c + d + e는 1 내지 30이고,상기 군에서,a + b + c + d + e + f는 1 내지 32이고,상기 군에서,a + b + c + d는 1 내지 32이고,상기 군에서,a + b + c + d + e는 1 내지 36이다.
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KR20220152107A (ko) | 2022-11-15 |
US20240114779A1 (en) | 2024-04-04 |
JP2024521605A (ja) | 2024-06-04 |
JP2024500434A (ja) | 2024-01-09 |
KR20220151981A (ko) | 2022-11-15 |
EP4255156A1 (en) | 2023-10-04 |
EP4254528A1 (en) | 2023-10-04 |
US20240114783A1 (en) | 2024-04-04 |
EP4255156A4 (en) | 2024-03-27 |
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