WO2020185059A1 - Dispositif électroluminescent organique - Google Patents
Dispositif électroluminescent organique Download PDFInfo
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- WO2020185059A1 WO2020185059A1 PCT/KR2020/095038 KR2020095038W WO2020185059A1 WO 2020185059 A1 WO2020185059 A1 WO 2020185059A1 KR 2020095038 W KR2020095038 W KR 2020095038W WO 2020185059 A1 WO2020185059 A1 WO 2020185059A1
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- 150000001875 compounds Chemical class 0.000 claims description 123
- -1 biphenylyl Chemical group 0.000 claims description 61
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- 229910052717 sulfur Inorganic materials 0.000 claims description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- 125000000217 alkyl group Chemical group 0.000 claims description 11
- 125000006819 (C2-60) heteroaryl group Chemical group 0.000 claims description 10
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- 229910052739 hydrogen Inorganic materials 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 claims description 10
- 125000003342 alkenyl group Chemical group 0.000 claims description 9
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 9
- 125000000609 carbazolyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 claims description 7
- 125000001072 heteroaryl group Chemical group 0.000 claims description 7
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 7
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- 229910052736 halogen Inorganic materials 0.000 claims description 4
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- 125000000449 nitro group Chemical class [O-][N+](*)=O 0.000 claims description 3
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- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 229960003540 oxyquinoline Drugs 0.000 description 1
- 125000003538 pentan-3-yl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- FVDOBFPYBSDRKH-UHFFFAOYSA-N perylene-3,4,9,10-tetracarboxylic acid Chemical compound C=12C3=CC=C(C(O)=O)C2=C(C(O)=O)C=CC=1C1=CC=C(C(O)=O)C2=C1C3=CC=C2C(=O)O FVDOBFPYBSDRKH-UHFFFAOYSA-N 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- 125000005561 phenanthryl group Chemical group 0.000 description 1
- 125000001484 phenothiazinyl group Chemical group C1(=CC=CC=2SC3=CC=CC=C3NC12)* 0.000 description 1
- XPPWLXNXHSNMKC-UHFFFAOYSA-N phenylboron Chemical group [B]C1=CC=CC=C1 XPPWLXNXHSNMKC-UHFFFAOYSA-N 0.000 description 1
- 125000004592 phthalazinyl group Chemical group C1(=NN=CC2=CC=CC=C12)* 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000128 polypyrrole Polymers 0.000 description 1
- 229920000123 polythiophene Polymers 0.000 description 1
- 150000004032 porphyrins Chemical class 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000003373 pyrazinyl group Chemical group 0.000 description 1
- 125000001725 pyrenyl group Chemical group 0.000 description 1
- PBMFSQRYOILNGV-UHFFFAOYSA-N pyridazine Chemical group C1=CC=NN=C1 PBMFSQRYOILNGV-UHFFFAOYSA-N 0.000 description 1
- 125000004076 pyridyl group Chemical group 0.000 description 1
- 125000000714 pyrimidinyl group Chemical group 0.000 description 1
- 125000000168 pyrrolyl group Chemical group 0.000 description 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
- 125000002943 quinolinyl group Chemical group N1=C(C=CC2=CC=CC=C12)* 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 125000003548 sec-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- XGVXKJKTISMIOW-ZDUSSCGKSA-N simurosertib Chemical compound N1N=CC(C=2SC=3C(=O)NC(=NC=3C=2)[C@H]2N3CCC(CC3)C2)=C1C XGVXKJKTISMIOW-ZDUSSCGKSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 125000004434 sulfur atom Chemical group 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- JLBRGNFGBDNNSF-UHFFFAOYSA-N tert-butyl(dimethyl)borane Chemical group CB(C)C(C)(C)C JLBRGNFGBDNNSF-UHFFFAOYSA-N 0.000 description 1
- 125000001113 thiadiazolyl group Chemical group 0.000 description 1
- 125000000335 thiazolyl group Chemical group 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- IBBLKSWSCDAPIF-UHFFFAOYSA-N thiopyran Chemical compound S1C=CC=C=C1 IBBLKSWSCDAPIF-UHFFFAOYSA-N 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- KWQNQSDKCINQQP-UHFFFAOYSA-K tri(quinolin-8-yloxy)gallane Chemical compound C1=CN=C2C(O[Ga](OC=3C4=NC=CC=C4C=CC=3)OC=3C4=NC=CC=C4C=CC=3)=CC=CC2=C1 KWQNQSDKCINQQP-UHFFFAOYSA-K 0.000 description 1
- LALRXNPLTWZJIJ-UHFFFAOYSA-N triethylborane Chemical group CCB(CC)CC LALRXNPLTWZJIJ-UHFFFAOYSA-N 0.000 description 1
- WXRGABKACDFXMG-UHFFFAOYSA-N trimethylborane Chemical group CB(C)C WXRGABKACDFXMG-UHFFFAOYSA-N 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- MXSVLWZRHLXFKH-UHFFFAOYSA-N triphenylborane Chemical group C1=CC=CC=C1B(C=1C=CC=CC=1)C1=CC=CC=C1 MXSVLWZRHLXFKH-UHFFFAOYSA-N 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 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
Images
Classifications
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- 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
- H10K85/6572—Polycyclic condensed heteroaromatic hydrocarbons comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
-
- 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
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
- H10K85/633—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/12—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising dopants
Definitions
- the present invention relates to an organic light-emitting device having improved driving voltage, efficiency, and lifetime.
- the organic light emission phenomenon refers to a phenomenon in which electrical energy is converted into light energy using an organic material.
- An organic light-emitting device using the organic light-emitting phenomenon has a wide viewing angle, excellent contrast, and fast response time, and has excellent luminance, driving voltage, and response speed characteristics, and thus many studies are being conducted.
- the organic light emitting device generally has a structure including an anode and a cathode, and an organic material layer between the anode and the cathode.
- the organic material layer is often made 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, it may be formed of a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and the like.
- a voltage is applied between the two electrodes, holes are injected from the anode and electrons from the cathode are injected into the organic layer, and excitons are formed when the injected holes and electrons meet. It glows when it falls back to the ground.
- Patent Document 1 Korean Patent Publication No. 10-2000-0051826
- Patent Document 2 Korean Patent Publication No. 10-2010-0023783
- the present invention relates to an organic light-emitting device having improved driving voltage, efficiency, and lifetime.
- the present invention provides the following organic light emitting device:
- the light-emitting layer comprises a compound represented by the following formula (1) and a compound represented by the following formula (2),
- Ar 1 is substituted or unsubstituted C 2-60 heteroaryl including any one or more selected from the group consisting of N, O and S,
- L is a single bond; Or a substituted or unsubstituted C 6-60 arylene,
- R 1 , R 2 , R 3 and R 4 are each independently hydrogen; heavy hydrogen; halogen; Cyano; Nitro; Amino; Substituted or unsubstituted C 1-60 alkyl; Substituted or unsubstituted C 3-60 cycloalkyl; Substituted or unsubstituted C 2-60 alkenyl; Substituted or unsubstituted C 6-60 aryl; Or substituted or unsubstituted C 2-60 heteroaryl including any one or more selected from the group consisting of N, O and S, and two adjacent to each other among R 1 , R 2 , R 3 and R 4 A C 6-60 aromatic ring, or a C 2-60 heteroaromatic ring including any one or more selected from the group consisting of N, O, and S may be formed,
- R 5 , R 6 , R 7 and R 8 are each independently hydrogen; Or substituted or unsubstituted C 2-60 heteroaryl including any one or more selected from the group consisting of N, O and S.
- Ar 2 and Ar 3 are each independently a substituted or unsubstituted C 6-60 aryl; Or substituted or unsubstituted C 2-60 heteroaryl including any one or more selected from the group consisting of N, O and S.
- the above-described organic light emitting device is excellent in driving voltage, efficiency, and lifetime.
- FIG. 1 shows an example of an organic light-emitting device comprising a substrate 1, an anode 2, a light-emitting layer 3, and a cathode 4.
- a substrate 1 is a substrate 1, an anode 2, a hole injection layer 5, a hole transport layer 6, a light emitting layer 3, a hole blocking layer 7, 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; 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; Alkyl sulfoxy group; Arylsulfoxy 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 it means substituted or unsubstituted with one or more substituents selected from the group consisting of a heterocyclic group containing one or more of N, O, and S atoms, or substituted or unsubstituted with two
- a substituent to which two or more substituents are connected may be a biphenyl group. That is, the biphenyl group may be an aryl group or may be interpreted as a substituent to which two phenyl groups are connected.
- the number of carbon atoms of the carbonyl group is not particularly limited, but it is preferably 1 to 40 carbon atoms. Specifically, it may be a compound having the following structure, but is not limited thereto.
- the ester group may be substituted with an oxygen of the ester group with a straight chain, branched or cyclic 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 number of carbon atoms of the imide group is not particularly limited, but it is preferably 1 to 25 carbon atoms. Specifically, it may be a compound having the following structure, but is not limited thereto.
- the silyl group is specifically trimethylsilyl group, triethylsilyl group, t-butyldimethylsilyl group, vinyldimethylsilyl group, propyldimethylsilyl group, triphenylsilyl group, diphenylsilyl group, phenylsilyl group, etc. However, it is not limited thereto.
- the boron group specifically includes a trimethyl boron group, a triethyl boron group, a t-butyldimethyl boron group, a triphenyl boron group, and 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 a linear or branched chain, and the number of carbon atoms is not particularly limited, but is preferably 1 to 40. According to an exemplary embodiment, the alkyl group has 1 to 20 carbon atoms. According to another exemplary embodiment, the alkyl group has 1 to 10 carbon atoms. 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 a linear or branched chain, and the number of carbon atoms is not particularly limited, but is preferably 2 to 40. According to an exemplary 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, and the like, but are not limited thereto.
- the cycloalkyl group is not particularly limited, but is preferably 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 cycloalkyl group has 3 to 20 carbon atoms. According to another exemplary embodiment, the cycloalkyl group has 3 to 6 carbon atoms.
- the aryl group is not particularly limited, but is preferably 6 to 60 carbon atoms, and may be a monocyclic aryl group or a polycyclic aryl group. According to an exemplary embodiment, the aryl group has 6 to 30 carbon atoms. According to an exemplary embodiment, the aryl group has 6 to 20 carbon atoms.
- the aryl group may be a phenyl group, a biphenyl group, or a terphenyl group, but the monocyclic aryl group is not limited thereto.
- the polycyclic aryl group may be a naphthyl group, an anthracenyl group, a phenanthryl group, a pyrenyl group, a perylenyl group, a chrysenyl group, a 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.
- Etc When the fluorenyl group is substituted, Etc.
- Etc it is not limited thereto.
- the heterocyclic group is a heterocyclic group including at least one of O, N, Si and S as a heterogeneous element, and the number of carbons is not particularly limited, but it is preferably 2 to 60 carbon atoms. According to an exemplary embodiment, the heterocyclic group has 6 to 30 carbon atoms. According to an exemplary embodiment, the number of carbon atoms of the heterocyclic group is 6 to 20.
- heterocyclic group examples include thiophene group, furan group, pyrrole group, imidazole group, thiazole group, oxazole group, oxadiazole group, triazole group, pyridyl group, bipyridyl group, pyrimidyl group, triazine group, triazole 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 , Indole group, carbazole group, benzoxazole group, benzoimidazole group, benzothiazole group, benzocarbazole group, benzothiophene group, dibenzothiophene group, benzofuranyl group, phen
- the aryl group among the aralkyl group, aralkenyl group, alkylaryl group, and arylamine group is the same as the example 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 example of the aforementioned alkyl group.
- the description of the aforementioned heterocyclic group may be applied.
- the alkenyl group of the aralkenyl group is the same as the example 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 aforementioned heterocyclic group 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 the cycloalkyl group described above may be applied except that the hydrocarbon ring is formed by bonding of two substituents.
- the heterocycle is not a monovalent group, and the description of the above-described heterocyclic group may be applied, except that two substituents are bonded to each other.
- the anode and cathode used in the present invention mean an electrode used in an organic light-emitting device.
- the cathode material a material having a large work function is preferable so that holes can be smoothly injected into the organic material 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; Poly(3-methylthiophene), poly[3,4-(ethylene-1,2-dioxy)thiophene] (PEDOT), conductive polymers such as polypyrrole and polyaniline, and the like, but are not limited thereto.
- the cathode material is 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; There are multi-layered materials such as LiF/Al or LiO 2 /Al, but are not limited thereto.
- the organic light-emitting device may further include a hole injection layer between the anode and a hole transport layer to be described later.
- the hole injection material is a layer that injects holes from the electrode, and the hole injection material has the ability to transport holes, so it has a hole injection effect at the anode, an excellent hole injection effect for the light emitting layer or the light emitting material, and is generated in the light emitting layer.
- a compound that prevents the transfer of the excitons into the electron injection layer or the electron injection material and has excellent thin film formation ability is preferable.
- the HOMO (highest occupied molecular orbital) of the hole injection material is between the work function of the positive electrode material and the HOMO of the surrounding organic material layer.
- hole injection material examples include metal porphyrin, oligothiophene, arylamine-based organic material, hexanitrile hexaazatriphenylene-based organic material, quinacridone-based organic material, perylene
- metal porphyrin oligothiophene
- arylamine-based organic material arylamine-based organic material
- hexanitrile hexaazatriphenylene-based organic material hexaazatriphenylene-based organic material
- quinacridone-based organic material quinacridone-based organic material
- perylene perylene
- the hole transport layer used in the present invention is a layer that receives holes from the anode or the hole injection layer formed on the anode and transports holes to the emission layer, and can be transferred to the emission layer by transporting holes from the anode or the hole injection layer as a hole transport material.
- a material with high mobility for holes is suitable.
- the hole transport material examples include an arylamine-based organic material, a conductive polymer, and a block copolymer having a conjugated portion and a non-conjugated portion, but are not limited thereto.
- the light-emitting layer used in the present invention is a layer capable of emitting light in a visible light region by combining holes and electrons transferred from an anode and a cathode, and a material having good quantum efficiency against fluorescence or phosphorescence is preferable.
- the emission layer includes a host material and a dopant material, and may include a compound represented by Chemical Formula 1 and Chemical Formula 2 as a host.
- Formula 1 may be represented by any one of the following Formulas 1-1 to 1-3:
- Ar 1 may be a substituted or unsubstituted C 2-60 heteroaryl containing 2 or more N, and more preferably, Ar 1 is a substituted or unsubstituted C 2- containing 2 or more N 20 may be heteroaryl, and more preferably, Ar 1 may be a substituted or unsubstituted quinazolinyl, or a substituted or unsubstituted quinoxalinyl, and most preferably, Ar 1 is from the group consisting of Can be any one chosen:
- L is a single bond; Or it may be a substituted or unsubstituted C 6-20 arylene, and more preferably, L may be a single bond.
- R 1 , R 2 , R 3 and R 4 may be bonded to each other to form a benzene ring.
- R 5 , R 6 , R 7 and R 8 are each independently hydrogen; Or it may be a substituted or unsubstituted C 2-20 heteroaryl including any one or more selected from the group consisting of N, O and S, and more preferably, R 5 , R 6 , R 7 and R 8 Each independently may be hydrogen or carbazolyl, and the carbazolyl may be unsubstituted or substituted with any one of phenyl, biphenylyl, naphthyl, naphthyl phenyl, and phenyl naphthyl, most preferably , R 5 , R 6 , R 7 and R 8 may each independently be hydrogen or any one selected from the group consisting of:
- R 5 , R 6 , R 7 and R 8 may be a C 2-20 heteroaryl including any one or more selected from the group consisting of substituted or unsubstituted N, O and S And, more preferably, at least one of R 5 , R 6 , R 7 and R 8 may be a substituted or unsubstituted carbazolyl.
- the compound represented by Formula 1 may be prepared by a manufacturing method such as Reaction Scheme 1-1 below, for example, and when R 5 , R 6 and R 8 are hydrogen and R 7 is carbazole, as an example, the following Scheme 1 It can be prepared by the same production method as -2, and other compounds can be prepared similarly.
- Ar 1 , L and R 1 to R 8 are the same as defined in Formula 1, and X 1 and X 2 are each independently halogen, preferably X 1 and Each X 2 is independently chloro or bromo.
- Reaction Schemes 1-1 and 1-2 are amine substitution reactions, preferably carried out in the presence of a palladium catalyst and a base, and the reactor for the amine substitution reaction may be changed as known in the art.
- the manufacturing method may be more specific in the manufacturing examples to be described later.
- Ar 2 and Ar 3 are each independently substituted or unsubstituted C 6-20 aryl; Or substituted or unsubstituted N, O, and may be a C 2-20 heteroaryl containing any one or more selected from the group consisting of S, more preferably, Ar 2 and Ar 3 are each independently, substituted Or it may be an unsubstituted C 6-20 aryl, and most preferably, Ar 2 and Ar 3 are each independently, phenyl, biphenylyl, terphenylyl, dimethyl fluorenyl, naphthyl, naphthyl phenyl, Or phenyl naphthyl.
- the compound represented by Formula 2 may be prepared by the same method as in Scheme 2 below, for example, and other compounds may be prepared similarly.
- Ar 2 and Ar 3 are as defined in Chemical Formula 2, X 3 is halogen, and preferably X 3 is chloro or bromo.
- Reaction Scheme 2 is an amine substitution reaction, preferably performed in the presence of a palladium catalyst and a base, and the reactor for the amine substitution reaction may be changed as known in the art.
- the manufacturing method may be more specific in the manufacturing examples to be described later.
- the weight ratio of the compound represented by Formula 1 and the compound represented by Formula 2 in the emission layer 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 emission layer may further include a dopant in addition to the host.
- the dopant material is not particularly limited as long as it is a material used in an organic light-emitting device. Examples include aromatic amine derivatives, strylamine compounds, boron complexes, fluoranthene compounds, and metal complexes.
- the aromatic amine derivative is a condensed aromatic ring derivative having a substituted or unsubstituted arylamino group, and includes pyrene, anthracene, chrysene, and periflanthene having an arylamino group, and the styrylamine compound is substituted or unsubstituted
- the styrylamine compound is substituted or unsubstituted
- at least one arylvinyl group is substituted on the arylamine, one or two or more substituents selected from the group consisting of an aryl group, silyl group, alkyl group, cycloalkyl group, and arylamino group are substituted or unsubstituted.
- the metal complex includes an iridium complex, a platinum complex, and the like, but is not limited thereto.
- representative compounds that can be used as dopant materials are as follows:
- the hole blocking layer is a layer between the electron transport layer and the light emitting layer to prevent holes injected from the anode from being recombined in the light emitting layer and passing to the electron transport layer, and is also referred to as a hole suppressing layer or a hole blocking layer.
- a material having high ionization energy is preferable for the hole blocking layer.
- the organic light-emitting device according to the present invention may include an electron transport layer between the emission layer and the cathode.
- the electron transport layer is a layer that receives electrons from the electron injection layer formed on the cathode or the cathode, transports electrons to the emission layer, and inhibits the transfer of holes from the emission layer.
- an electron transport material electrons are well injected from the cathode.
- a material that can be received and transferred to the emission layer a material having high mobility for electrons is suitable.
- the electron transport material a material capable of receiving electrons from the cathode and transferring them to the light emitting layer, and a material having high mobility for electrons is suitable.
- the electron transport material include an 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 transport layer can be used with any desired cathode material as used according to the prior art.
- suitable cathode materials are conventional materials that have a low work function and are followed by an aluminum layer or a silver layer. Specifically, they are cesium, barium, calcium, ytterbium, and samarium, and in each case an aluminum layer or a silver layer follows.
- the organic light-emitting device may further include an electron injection layer between the electron transport layer and the cathode.
- the electron injection layer is a layer that injects electrons from the electrode, 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, and hole injection of excitons generated in the light emitting layer A compound that prevents migration to the layer and has excellent thin film formation ability is preferable.
- materials that can be used as the electron injection layer include fluorenone, anthraquinodimethane, diphenoquinone, thiopyran dioxide, oxazole, oxadiazole, triazole, imidazole, perylenetetracarboxylic acid, preore And derivatives thereof, such as nilidene methane, anthrone, and the like, metal complex compounds, and nitrogen-containing 5-membered ring derivatives, but are not limited thereto.
- the metal complex compound examples include lithium 8-hydroxyquinolinato, 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-naphtholato)aluminum, bis(2-methyl-8-quinolinato)(2-naphtholato)gallium, etc. It is 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 comprising a substrate 1, an anode 2, a light-emitting layer 3, and a cathode 4.
- 2 is a substrate 1, an anode 2, a hole injection layer 5, a hole transport layer 6, a light emitting layer 3, a hole blocking layer 7, an electron injection and transport layer 8 and a cathode 4 It shows an example of an organic light emitting device made of.
- the organic light emitting device according to the present invention can be manufactured by sequentially stacking the above-described configurations. At this time, using a PVD (physical vapor deposition) method such as sputtering or e-beam evaporation, the anode is formed by depositing a metal or a conductive metal oxide or an alloy thereof on the substrate. And, after forming each of the above-described layers thereon, it can be prepared by depositing a material that can be used as a cathode thereon. In addition to this method, 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.
- PVD physical vapor deposition
- 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 refers to spin coating, dip coating, doctor blading, inkjet printing, screen printing, spray method, roll coating, and the like, but is not limited thereto.
- an organic light-emitting device may be manufactured by sequentially depositing an organic material layer and an anode material from a cathode material on a substrate (WO 2003/012890).
- the manufacturing method is not limited thereto.
- the organic light-emitting device may be a top emission type, a bottom emission type, or a double-sided emission type depending on the material used.
- a glass substrate coated with a thin film of 1000 ⁇ of ITO (indium tin oxide) was put in distilled water dissolved in a detergent and washed with ultrasonic waves.
- ITO indium tin oxide
- a product made by Fischer Co. was used as a detergent, and distilled water secondarily filtered with a filter manufactured by Millipore Co. was used as distilled water.
- ultrasonic cleaning was performed with a solvent of isopropyl alcohol, acetone, and methanol, dried, and then transported to a plasma cleaner.
- the substrate was transported to a vacuum evaporator.
- Compound HI-1 was formed as a hole injection layer on the prepared ITO transparent electrode to a thickness of 1150 ⁇ , but the following compound A-1 was p-doped at a concentration of 1.5%.
- the following compound HT-1 was vacuum-deposited on the hole injection layer to form a hole transport layer having a thickness of 800 ⁇ .
- the compound 1 prepared above and the following compound Dp-7 were vacuum-deposited at a weight ratio of 98:2 to form a red light emitting layer having a thickness of 400 ⁇ .
- a hole blocking layer was formed by vacuum vapor deposition of the following compound HB-1 with a film thickness of 30 ⁇ on the emission layer.
- the following compound ET-1 and the following compound LiQ were vacuum-deposited at a weight ratio of 2:1 on the hole blocking layer to form an electron injection and transport layer with a thickness of 300 ⁇ .
- Lithium fluoride (LiF) with a thickness of 12 ⁇ and aluminum with a thickness of 1000 ⁇ were sequentially deposited on the electron injection and transport layer to form a negative electrode.
- the deposition rate of organic materials was maintained at 0.4 ⁇ 0.7 ⁇ /sec, the deposition rate of lithium fluoride at the cathode was 0.3 ⁇ /sec, and the deposition rate of aluminum was 2 ⁇ /sec, and the vacuum degree during deposition was 2*10. Maintaining -7 to 5*10 -6 torr, an organic light emitting device was manufactured.
- An organic light-emitting device was manufactured in the same manner as in Comparative Example 1, except that the compound shown in Table 1 below was used instead of Compound 1 in the organic light-emitting device of Comparative Example 1.
- an organic light-emitting device was manufactured in the same manner as in Comparative Example 1, except that the compounds shown in Table 2 below were used in the light-emitting layer and the hole transport layer, respectively, instead of Compound 1 and Compound HT-1. .
- the lifetime T95 refers to the time it takes for the luminance to decrease to 95% from the initial luminance (6000 nit).
- an embodiment of the present invention was superior to the case where the compound represented by Formula 2 was used in the hole transport region (Comparative Examples 26 to 73), and included the compound represented by Formula 1 or the compound represented by Formula 2.
- the result was superior to that of the organic light emitting device (Comparative Examples 74 to 137) including any one of compounds C-1 to C-12 not included in the present invention as a cohost.
- substrate 2 anode
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Abstract
La présente invention concerne un dispositif électroluminescent organique ayant une tension de commande, une efficacité et une durée de vie améliorées.
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KR20170061594A (ko) * | 2015-11-26 | 2017-06-05 | 덕산네오룩스 주식회사 | 유기전기소자용 화합물, 이를 이용한 유기전기소자 및 그 전자 장치 |
KR20170087691A (ko) * | 2016-01-21 | 2017-07-31 | 덕산네오룩스 주식회사 | 유기전기 소자용 화합물, 이를 이용한 유기전기소자 및 그 전자 장치 |
KR20180041581A (ko) * | 2016-10-14 | 2018-04-24 | 롬엔드하스전자재료코리아유한회사 | 유기 전계 발광 소자 |
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CN102197027A (zh) | 2008-08-22 | 2011-09-21 | 株式会社Lg化学 | 用于有机电子器件的材料以及使用所述材料的有机电子器件 |
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KR20180111558A (ko) * | 2017-03-30 | 2018-10-11 | 주식회사 엘지화학 | 유기 발광 소자 |
KR101857632B1 (ko) * | 2018-02-02 | 2018-05-14 | 덕산네오룩스 주식회사 | 유기전기소자용 화합물, 이를 이용한 유기전기소자 및 그 전자 장치 |
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