WO2013078595A1 - 一种具有三元掺杂空穴传输层的有机电致发光器件及其制备方法 - Google Patents
一种具有三元掺杂空穴传输层的有机电致发光器件及其制备方法 Download PDFInfo
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/14—Carrier transporting layers
- H10K50/15—Hole transporting layers
- H10K50/155—Hole transporting layers comprising dopants
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- H10K71/10—Deposition of organic active material
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- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/30—Doping active layers, e.g. electron transporting layers
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- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/30—Coordination compounds
- H10K85/321—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3]
- H10K85/324—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3] comprising aluminium, e.g. Alq3
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- H—ELECTRICITY
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- 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
- H10K85/636—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom
Definitions
- the invention belongs to the field of organic electroluminescence, and in particular relates to an organic electroluminescent device having a ternary doped hole transport layer and a preparation method thereof. Background technique
- the principle of luminescence of organic electroluminescent devices is based on the lowest unoccupied molecular orbital (LUMO) of electrons injected from the cathode into the organic matter under the action of an applied electric field, and the highest occupied orbit (HOMO) of holes injected from the anode to the organic matter.
- the electrons and holes meet and combine in the luminescent layer to form excitons.
- the excitons migrate under the action of the electric field, transfer energy to the luminescent material, and excite the electrons from the ground state to the excited state.
- the excited state energy is deactivated by radiation to generate photons. , translation of light energy.
- the current method for increasing the injection and transport rate of carriers is to dope into a hole transport material with a small amount of p-type materials (such as Mo0 3 , F4-TCNQ, 1-TANA, 2-TANA, etc.). (m-MTDATA, NPB, etc.).
- p-type materials such as Mo0 3 , F4-TCNQ, 1-TANA, 2-TANA, etc.
- the present invention provides an organic electroluminescent device having a ternary doped hole transport layer and a method of fabricating the same.
- the present invention improves the hole injection and transport ability by doping the onium salt and the hole transport material into the metal compound to form p-doping, and finally improves the light-emitting efficiency, and the ternary-doped hole transport layer in the present invention
- the material is mainly composed of metal compounds, and the preparation process is relatively difficult, which is beneficial to the industrial production of the device, and the processing cost is low, which is beneficial to future commercial applications.
- the present invention provides an organic electroluminescent device having a ternary doped hole transport layer, the structure comprising a conductive anode substrate, a ternary doped hole transport layer, a light emitting layer, and an electron transport layer which are sequentially stacked.
- the electron injecting layer and the cathode layer are made of a mixed material formed by doping a hole transporting material into a metal compound.
- the conductive anode substrate may be a conductive glass substrate selected from the group consisting of indium tin oxide glass (ITO), fluorine-doped tin oxide glass (FTO), aluminum-doped zinc oxide glass ( ⁇ ) or indium-doped zinc oxide glass ( ⁇ ).
- ITO indium tin oxide glass
- FTO fluorine-doped tin oxide glass
- ⁇ aluminum-doped zinc oxide glass
- ⁇ indium-doped zinc oxide glass
- the material of the ternary doped hole transport layer is mainly composed of a metal compound, and the cesium salt and the hole transporting material are doped in the metal compound to form a mixed material.
- the ternary doped hole transport layer can be obtained by the following method: doping a cerium salt, a hole transporting material, and a metal compound by electron beam evaporation to form a mixed material.
- a ternary doped hole transport layer is deposited on the conductive anode substrate.
- the metal compound is a metal oxide (e.g., zinc oxide (ZnO) or titanium dioxide (Ti0 2 )) or a metal sulfide (e.g., zinc sulfide (ZnS) or lead sulfide (PbS)).
- a metal oxide e.g., zinc oxide (ZnO) or titanium dioxide (Ti0 2 )
- a metal sulfide e.g., zinc sulfide (ZnS) or lead sulfide (PbS)
- the onium salt is azide (CsN 3 ), cesium fluoride (CsF ), cesium carbonate (Cs 2 C0 3 ) or cesium oxide (Cs 2 0 ).
- the doping salt has a doping mass fraction of from 1% to 5%.
- the hole transporting material is 1,1-di[4-[indole, ⁇ '-bis(P-fluorenylphenyl)amino]phenyl]cyclohexane (TAPC), N, N,-bis(3-mercaptophenyl)-N,N,-diphenyl-4,4,-biphenylenediamine (TPD), 4,4',4"-three (carbazole-9-yl)triphenylamine (TCTA) or N,N,-(1-naphthyl)-N,N,-diphenyl-4,4,-biphenyldiamine (NPB).
- TAPC 1,1-di[4-[indole, ⁇ '-bis(P-fluorenylphenyl)amino]phenyl]cyclohexane
- TPD N, N,-bis(3-mercaptophenyl)-N,N,-diphenyl-4,4,-bipheny
- the thickness of the ternary doped hole transport layer is from 20 to 60 nm.
- the metal compound can improve the work function and reduce the hole injection barrier, and the doping of the strontium salt can form p-doping, which facilitates hole injection and transport, and holes.
- the doping of the transport material can effectively further increase the transport rate of holes, improve the film formation quality (good film formation of small organic molecules), and further improve the recombination probability of the exciton of the light-emitting layer.
- the material of the ternary doped hole transporting layer in the present invention is mainly composed of a metal compound.
- the preparation process is less difficult, which is beneficial to the industrial production of the device, and the low processing cost, which is beneficial to future commercial applications.
- the luminescent layer is deposited on the ternary doped hole transport layer.
- the material of the luminescent layer is 4-(disilery fluorenyl)-2-butyl-6-(1,1,7,7-tetradecyl galostazone-9-vinyl)-4H-pyridyl J(DCJTB), 8-hydroxyquinoline aluminum (Alq 3 ), bis(4,6-difluorophenylpyridine-N,C 2 )pyridinyl hydrazide (FIrpic), bis(4,6-difluoro Phenylpyridine)-tetrakis(1-pyrazolyl)borate (FIr6), bis(2-indolyl-diphenyl[f,h]quinoxaline)(acetylacetonate) ruthenium (IR(MDQ)) At least one of 2 (acac)) and tris(2-phenylpyridine) ruthenium (Ir(ppy) 3 ). More preferably, the luminescent material is 8-hydroxyquinoline aluminum.
- the material of the light-emitting layer is a host material doped with a guest material, and the doping quality fraction of the guest material is 1% to 20%; wherein:
- the guest material is 4-(disanimidyl)-2-butyl-6- (1,1,7,7-tetradecyl sulpirine-9-ethylglycosyl)-4H-pyran, 8- Aluminum hydroxyquinolate, bis(4,6-difluorophenylpyridine-N,C 2 )pyridinium hydrazide, bis(4,6- Difluorophenylpyridine)-tetrakis(4-pyrazolyl)borate, bis(2-indenyl-diphenyl[f,h]quinoxaline) (acetylacetone) ruthenium or tris(2-benzene) Pyridine
- the host material is 1,1-di[4-[indole, ⁇ '-bis(P-nonylphenyl)amino]phenyl]cyclohexane (TAPC), N, N, -di(3-nonylphenyl) ) - N, N, -diphenyl-4,4,-biphenylenediamine (TPD), 4,4',4"-tris(carbazol-9-yl)triphenylamine (TCTA), N, N , - (1-Naphthyl)-N, N, -diphenyl-4,4,-biphenyldiamine (NPB), 2-(4-biphenyl)-5-(4-tert-butyl) Phenyl-1,3,4-oxadiazole (PBD), 8-hydroxyquinoline aluminum (Alq 3 ), 4,7-diphenyl-1,10-phenanthroline (Bphen), 1,2, One or both of a 4-triazo
- the thickness of the light-emitting layer is 2 to 50 nm. More preferably, the thickness of the light-emitting layer is 20 nm.
- An electron transport layer is deposited on the light emitting layer.
- the material of the electron transport layer is 2-(4-biphenyl)-5-(4-tert-butyl)phenyl-1,3,4-oxadiazole (PBD), 8-hydroxyquinoline aluminum (Alq 3 ), 4,7-diphenyl-1,10-phenanthroline (Bphen), 1,2,4-triazole derivative (such as TAZ) or N-arylbenzimidazole (TPBI).
- the electronic material is 4,7-diphenyl-1,10-phenanthroline.
- the electron transport layer has a thickness of 40 to 80 nm. More preferably, the thickness of the electron transport layer is 60 nm
- the material of the electron injecting layer is LiF, CaF 2 or NaF. More preferably, the electron injection layer is
- the electron injecting layer has a thickness of 0.5 to 5 nm. More preferably, the thickness of the electron injecting layer is 0.7 nm.
- the cathode may be silver (Ag), aluminum (Al), platinum (Pt) or gold (Au). More preferably, the cathode is aluminum.
- the thickness of the cathode is 80 to 250 nm. More preferably, the thickness of the cathode is 150 nm.
- the conductive anode substrate is ultrasonically cleaned, and then cleaned and then subjected to oxygen plasma treatment;
- electron beam evaporation of the ternary doped hole transport layer on the surface of the conductive anode substrate after oxygen plasma treatment The material of the ternary doped hole transport layer is a mixed material formed by doping a hole salt and a hole transport material into the metal compound;
- the organic contaminants on the surface of the conductive anode substrate are removed by ultrasonic cleaning.
- the conductive anode substrate may be a conductive glass substrate selected from the group consisting of indium tin oxide glass (ITO), fluorine-doped tin oxide glass (FTO), aluminum-doped zinc oxide glass ( ⁇ ) or indium-doped zinc oxide glass ( ⁇ ).
- ITO indium tin oxide glass
- FTO fluorine-doped tin oxide glass
- ⁇ aluminum-doped zinc oxide glass
- ⁇ indium-doped zinc oxide glass
- the conductive anode substrate is sequentially sonicated with detergent, deionized water, acetone, ethanol and isopropanol for 15 min.
- the oxygen plasma treatment time is 5 to 15 minutes, and the power is 10 to 50 W.
- the ternary doped hole transport layer is vapor-deposited on the surface of the conductive anode substrate after the oxygen plasma treatment.
- the material of the ternary doped hole transport layer is a mixed material formed by doping a metal compound with a cerium salt and a hole transporting material.
- the metal compound is a metal oxide (e.g., zinc oxide (ZnO) or titanium dioxide (Ti0 2 )) or a metal sulfide (e.g., zinc sulfide (ZnS) or lead sulfide (PbS)).
- a metal oxide e.g., zinc oxide (ZnO) or titanium dioxide (Ti0 2 )
- a metal sulfide e.g., zinc sulfide (ZnS) or lead sulfide (PbS)
- the onium salt is azide (CsN 3 ), cesium fluoride (CsF ), cesium carbonate (Cs 2 C0 3 ) or cesium oxide (Cs 2 0 ).
- the doping salt has a doping mass fraction of from 1% to 5%.
- the hole transporting material is 1,1-bis[4-[indole, ⁇ '-bis(P-fluorenylphenyl)amino]phenyl]cyclohexane (TAPC), hydrazine, hydrazine, -di(3) -nonylphenyl) - hydrazine, hydrazine, -diphenyl-4,4,-biphenylenediamine (TPD), 4,4',4"-tris(carbazol-9-yl)triphenylamine (TCTA) Or ⁇ , ⁇ , -( 1-naphthyl) - fluorene, fluorene, -diphenyl-4,4,-biphenyldiamine ( ⁇ ).
- the hole transporting material has a doping mass fraction of 10 % ⁇ 40%.
- the thickness of the ternary doped hole transport layer is from 20 to 60 nm.
- the metal compound can improve the work function and reduce the hole injection barrier, and the doping of the strontium salt can form p-doping, which facilitates hole injection and transport, and holes.
- the doping of the transport material can effectively further increase the transport rate of holes, improve the film formation quality (good film formation of small organic molecules), and further improve the recombination probability of the exciton of the light-emitting layer.
- the material of the ternary doped hole transporting layer in the present invention is mainly composed of a metal compound.
- the preparation process is less difficult, which is beneficial to the industrial production of the device, and the low processing cost, which is beneficial to future commercial applications.
- the light-emitting layer, the electron transport layer, the electron injecting layer, and the cathode are sequentially evaporated, and finally, the desired organic electroluminescent device is obtained.
- the luminescent layer is deposited on the ternary doped hole transport layer.
- the material of the luminescent layer is 4-(disilery fluorenyl)-2-butyl-6-(1,1,7,7-tetradecyl galostazone-9-vinyl)-4H-pyridyl J(DCJTB), 8-hydroxyquinoline aluminum (Alq 3 ), bis(4,6-difluorophenylpyridine-N,C 2 )pyridinyl hydrazide (FIrpic), bis(4,6-difluoro Phenylpyridine)-tetrakis(1-pyrazolyl)borate (FIr6), bis(2-indolyl-diphenyl[f,h]quinoxaline)(acetylacetonate) ruthenium (IR(MDQ)) At least one of 2 (acac)) and tris(2-phenylpyridine) ruthenium (Ir(ppy) 3 ). More preferably, the luminescent material is 8-hydroxyquinoline aluminum.
- the material of the light-emitting layer is a host material doped guest material, and the dopant material of the guest material The amount fraction is 1% ⁇ 20%;
- the guest material is 4-(disanimidyl)-2-butyl-6- (1,1,7,7-tetradecyl sulpirine-9-ethylglycosyl)-4H-pyran, 8- Aluminum hydroxyquinolate, bis(4,6-difluorophenylpyridine-N,C 2 )pyridinium oxime, bis(4,6-difluorophenylpyridine)-tetrakis(1-pyrazolyl)boronic acid Hydrazine, bis(2-indenyl-diphenyl[f,h]quinoxaline) (acetylacetone) ruthenium or tris(2-phenylpyridine) ruthenium;
- the host material is 1,1-di[4-[indole, ⁇ '-bis(P-nonylphenyl)amino]phenyl]cyclohexane (TAPC), N, N, -di(3-nonylphenyl) ) - N, N, -diphenyl-4,4,-biphenylenediamine (TPD), 4,4',4"-tris(carbazol-9-yl)triphenylamine (TCTA), N, N , - (1-Naphthyl)-N, N, -diphenyl-4,4,-biphenyldiamine (NPB), 2-(4-biphenyl)-5-(4-tert-butyl) Phenyl-1,3,4-oxadiazole (PBD), 8-hydroxyquinoline aluminum (Alq 3 ), 4,7-diphenyl-1,10-phenanthroline (Bphen), 1,2, One or both of a 4-triazo
- the thickness of the light-emitting layer is 2 to 50 nm. More preferably, the thickness of the light-emitting layer is 20 nm.
- An electron transport layer is deposited on the light emitting layer.
- the material of the electron transport layer is 2-(4-biphenyl)-5-(4-tert-butyl)phenyl-1,3,4-oxadiazole (PBD), 8-hydroxyquinoline aluminum (Alq 3 ), 4,7-diphenyl-1,10-phenanthroline (Bphen), 1,2,4-triazole derivative (such as TAZ) or N-arylbenzimidazole (TPBI).
- the electronic material is 4,7-diphenyl-1,10-phenanthroline.
- the electron transport layer has a thickness of 40 to 80 nm. More preferably, the thickness of the electron transport layer is 60 nm
- the material of the electron injecting layer is LiF, CaF 2 or NaF. More preferably, the electron injection layer is
- the electron injecting layer has a thickness of 0.5 to 5 nm. More preferably, the thickness of the electron injecting layer is 0.7 nm.
- the cathode may be silver (Ag), aluminum (Al), platinum (Pt) or gold (Au). More preferably, The cathode is aluminum.
- the thickness of the cathode is 80 to 250 nm. More preferably, the thickness of the cathode is 150 nm.
- the invention provides an organic electroluminescent device having a ternary doped hole transport layer and a preparation method thereof, which have the following beneficial effects:
- the material of the ternary doped hole transport layer in the present invention is a mixed material formed by doping a hole salt and a hole transporting material into a metal compound, and the metal compound can improve the work function and reduce the hole injection barrier.
- the doping of cerium salt can form p-doping, which is beneficial to the injection and transport of holes.
- the doping of hole transporting material can effectively increase the transport rate of holes and improve the film-forming quality. Good), thereby increasing the recombination probability of the exciton of the luminescent layer, and finally improving the luminous efficiency;
- a small amount of p-type material (doping mass fraction of 0.5 to 2%) is doped into the hole transporting material, and the material of the ternary doped hole transporting layer in the present invention is made of metal.
- the compound is the main body, the preparation process is less difficult, which is beneficial to the industrial production of the device, and the processing cost is low, which is beneficial to the commercial application in the future.
- Example 2 is an organic electroluminescent device having a ternary doped hole transport layer prepared in Example 1 of the present invention: ITO / (ZnO: NPB: CsF) / Alq 3 / Bphen / LiF / Al and conventional Electroluminescence device: Comparison of current efficiency and current density of ITO/Mo0 3 /NPB/Alq 3 / Bphen/LiF/Al. detailed description
- the present invention provides an organic electroluminescent device having a ternary doped hole transport layer, the structure comprising a conductive anode substrate, a ternary doped hole transport layer, a light emitting layer, and an electron transport layer which are sequentially stacked.
- the electron injecting layer and the cathode layer are made of a mixed material formed by doping a hole transporting material into a metal compound.
- the material of the ternary doped hole transport layer is a mixed material formed by doping a metal compound with a cerium salt and a hole transporting material.
- the ternary doped hole transporting layer can be obtained by the following method: Doping a cerium salt, a hole transporting material and a metal compound by electron beam evaporation to form a mixed material.
- a ternary doped hole transport layer is deposited on the conductive anode substrate.
- the metal compound is a metal oxide (eg, zinc oxide ( ⁇ ) or titanium dioxide (Ti0 2 )) or a metal sulfide (eg, zinc sulfide (ZnS) or lead sulfide (PbS)), and the metal oxide or metal sulfide
- the melting point is 1800 ° C or below, and can be prepared by a thermal evaporation method, and the crystal color is colorless or light-colored; among them, ZnO, Ti 2 or ZnS is preferred.
- the cerium salt is azide strontium (CsN 3 ), cesium fluoride (CsF), cesium carbonate (Cs 2 C0 3 ) or cerium oxide (Cs 2 0 ).
- the doping salt has a doping mass fraction of 1% to 5%.
- the hole transporting material is 1,1-bis[4-[ ⁇ , ⁇ '-bis(P-fluorenylphenyl)amino]phenyl]cyclohexane (TAPC), N, N,-di(3-fluorenyl) Phenyl) - N, N,-diphenyl-4,4,-biphenylenediamine (TPD), 4,4',4"-tris (carbazole) -9-yl)triphenylamine (TCTA) or N,N,-(1-naphthyl)-N,N,-diphenyl-4,4,-biphenyldiamine (NPB).
- the doping mass fraction of the hole transporting material is 10% to 40%.
- the thickness of the ternary doped hole transport layer is 20 to 60 nm.
- the metal compound can improve the work function and reduce the hole injection barrier, and the doping of the strontium salt can form p-doping, which facilitates hole injection and transport, and holes.
- the doping of the transport material can effectively further increase the transport rate of holes, improve the film formation quality (good film formation of small organic molecules), and further improve the recombination probability of the exciton of the light-emitting layer.
- the material of the ternary doped hole transporting layer in the present invention is mainly composed of a metal compound.
- the preparation process is less difficult, which is beneficial to the industrial production of the device, and the low processing cost, which is beneficial to future commercial applications.
- the luminescent layer is deposited on the ternary doped hole transport layer.
- the material of the luminescent layer is 4-(disilery fluorenyl)-2-butyl-6-(1,7,7-tetradecyl galostazone-9-vinyl)-4H-pyran (DCJTB) ), 8-hydroxyquinoline aluminum (Alq 3 ), bis( 4,6-difluorophenylpyridine-N,C 2 )pyridinyl hydrazide (FIrpic), bis(4,6-difluorophenylpyridine) - tetrakis(1-pyrazolyl)borate ruthenium (FIr6), bis(2-indolyl-diphenyl[f,h]quinoxaline)(acetylacetonate) ruthenium (IR(MDQ) 2 (acac) And at least one of tris(2-phenylpyridine) ruthenium (Ir(ppy) 3 ); or the luminescent layer is made of a host material doped guest material, and the doping mass
- the guest material is 4-(disanimidyl)-2-butyl-6- (1,1,7,7-tetradecyl sulpirine-9-ethylglycosyl)-4H-pyran, 8- Aluminum hydroxyquinolate, bis(4,6-difluorophenylpyridine-N,C 2 )pyridinium oxime, bis(4,6-difluorophenylpyridine)-tetrakis(1-pyrazolyl)boronic acid Hydrazine, bis(2-indenyl-diphenyl[f,h]quinoxaline) (acetylacetone) ruthenium or tris(2-phenylpyridine) ruthenium;
- the host material is 1,1-di[4-[indole, ⁇ '-bis(P-fluorenylphenyl)amino]phenyl]cyclohexane (TAPC), N, N,-bis(3-mercaptophenyl)-N,N,-diphenyl-4,4,-biphenyldiamine (TPD), 4,4',4"-tris(carbazole-9- Triphenylamine ( TCTA ), N, N - ( 1-naphthyl) - N, N, -diphenyl-4,4, -biphenylenediamine ( NPB ), 2-(4-biphenyl) -5-(4-tert-butyl)phenyl-1,3,4-oxadiazole (PBD), 8-hydroxyquinoline aluminum (Alq 3 ), 4,7-diphenyl-1,10-phenanthrene One or both of porphyrin (Bphen), 1,2,4-triazole derivative
- the thickness of the light-emitting layer is 2 to 50 nm.
- An electron transport layer is deposited on the light emitting layer.
- the material of the electron transport layer is 2-(4-biphenyl)-5-(4-tert-butyl)phenyl-1,3,4-oxadiazole (PBD), 8-hydroxyquinoline aluminum (Alq 3 , 4,7-diphenyl-1,10-phenanthroline (Bphen), 1,2,4-triazole derivative (such as TAZ) or N-aryl benzimidazole (TPBI).
- the electron transport layer has a thickness of 40 to 80 nm.
- the material of the electron injecting layer is LiF, CaF 2 or NaF.
- the thickness of the electron injecting layer is 0.5 to 5 nm.
- the cathode can be silver (Ag), aluminum (Al), platinum (Pt) or gold (Au).
- the thickness of the cathode is 80 ⁇ 250
- the present invention provides a method of preparing an organic electroluminescent device having a ternary doped hole transport layer, comprising the steps of:
- the conductive anode substrate is ultrasonically cleaned, and then cleaned and then subjected to oxygen plasma treatment;
- electron beam evaporation of the ternary doped hole transport layer on the surface of the conductive anode substrate after oxygen plasma treatment The material of the ternary doped hole transport layer is a mixed material formed by doping a hole salt and a hole transport material into the metal compound;
- the desired organic electroluminescent device is obtained.
- the organic contaminants on the surface of the conductive anode substrate are removed by ultrasonic cleaning.
- the conductive anode substrate may be a conductive glass substrate selected from the group consisting of indium tin oxide glass (ITO), fluorine-doped tin oxide glass (FTO), aluminum-doped zinc oxide glass ( ⁇ ) or indium-doped zinc oxide glass ( ⁇ ).
- ITO indium tin oxide glass
- FTO fluorine-doped tin oxide glass
- ⁇ aluminum-doped zinc oxide glass
- ⁇ indium-doped zinc oxide glass
- the oxygen plasma treatment time is 5 to 15 minutes, and the power is 10 to 50 W.
- the ternary doped hole transport layer is vapor-deposited on the surface of the conductive anode substrate after the oxygen plasma treatment.
- the material of the ternary doped hole transport layer is a mixed material formed by doping a metal compound with a cerium salt and a hole transporting material.
- the metal compound is a metal oxide (eg, zinc oxide (ZnO) or titanium dioxide (Ti0 2 )) or a metal sulfide (eg, zinc sulfide (ZnS) or lead sulfide (PbS)), and the metal oxide or metal sulfide
- the melting point is 1800 ° C or below, and can be prepared by a thermal evaporation method, and the crystal color is colorless or light-colored; among them, ZnO, Ti 2 or ZnS is preferred.
- the cerium salt is azide strontium (CsN 3 ), cesium fluoride (CsF), cesium carbonate (Cs 2 C0 3 ) or cerium oxide (Cs 2 0 ).
- the doping salt has a doping mass fraction of 1% to 5%.
- the hole transporting material is 1,1-bis[4-[ ⁇ , ⁇ '-bis(P-fluorenylphenyl)amino]phenyl]cyclohexane (TAPC), N, N,-di(3-fluorenyl) Phenyl) - N, N,-diphenyl-4,4,-biphenylenediamine (TPD), 4,4',4"-tris(carbazol-9-yl)triphenylamine (TCTA) or N , N,-(1-naphthyl)-N,N,-diphenyl-4,4,-biphenyldiamine (NPB).
- the hole transporting material has a doping mass fraction of 10% to 40%.
- the thickness of the ternary doped hole transport layer is 20 to 60 nm.
- the metal compound can improve the work function and reduce the hole injection potential.
- the doping of cerium salt can form p-doping, which is beneficial to the injection and transport of holes, and the doping of hole transporting materials can effectively further increase the transport rate of holes and improve the quality of film formation (organic small molecules).
- the film forming property is good), thereby further increasing the recombination probability of the exciton of the luminescent layer.
- the light-emitting layer, the electron transport layer, the electron injecting layer, and the cathode are sequentially evaporated, and finally, the desired organic electroluminescent device is obtained.
- the luminescent layer is deposited on the ternary doped hole transport layer.
- the material of the luminescent layer is 4-(disilery fluorenyl)-2-butyl-6-(1,7,7-tetradecyl galostazone-9-vinyl)-4H-pyran (DCJTB) ), 8-hydroxyquinoline aluminum (Alq 3 ), bis( 4,6-difluorophenylpyridine-N,C 2 )pyridinyl hydrazide (FIrpic), bis(4,6-difluorophenylpyridine) - tetrakis(1-pyrazolyl)borate ruthenium (FIr6), bis(2-indolyl-diphenyl[f,h]quinoxaline)(acetylacetonate) ruthenium (IR(MDQ) 2 (acac) And at least one of tris(2-phenylpyridine) ruthenium (Ir(ppy) 3 ); or
- the material of the luminescent layer is a host material doped with a guest material, and the doping mass fraction of the guest material is 1% to 20%; wherein:
- the guest material is 4-(disanimidyl)-2-butyl-6- (1,1,7,7-tetradecyl sulpirine-9-ethylglycosyl)-4H-pyran, 8- Aluminum hydroxyquinolate, bis(4,6-difluorophenylpyridine-N,C 2 )pyridinium oxime, bis(4,6-difluorophenylpyridine)-tetrakis(1-pyrazolyl)boronic acid Hydrazine, bis(2-indenyl-diphenyl[f,h]quinoxaline) (acetylacetone) ruthenium or tris(2-phenylpyridine) ruthenium;
- the host material is 1,1-di[4-[indole, ⁇ '-bis(P-nonylphenyl)amino]phenyl]cyclohexane (TAPC), N, N, -di(3-nonylphenyl) ) - N, N, -diphenyl-4,4,-biphenyldiamine (TPD), 4,4',4"-tris (carbazole) -9-yl)triphenylamine (TCTA), N, N, -(1-naphthyl)-N,N,-diphenyl-4,4,-biphenyldiamine (NPB), 2- (4- Biphenyl)-5-(4-tert-butyl)phenyl-1,3,4-oxadiazole (PBD), 8-hydroxyquinoline aluminum (Alq 3 ), 4,7-diphenyl-1 One or both of 10-phenanthroline (Bphen), a 1,2,4-triazole derivative
- the thickness of the light-emitting layer is 2 to 50 nm.
- An electron transport layer is deposited on the light emitting layer.
- the material of the electron transport layer is 2-(4-biphenyl)-5-(4-tert-butyl)phenyl-1,3,4-oxadiazole (PBD), 8-hydroxyquinoline aluminum (Alq 3 , 4,7-diphenyl-1,10-phenanthroline (Bphen), 1,2,4-triazole derivative (such as TAZ) or N-aryl benzimidazole (TPBI).
- the electron transport layer has a thickness of 40 to 80 nm.
- the material of the electron injecting layer is LiF, CaF 2 or NaF.
- the thickness of the electron injecting layer is 0.5 to 5 nm.
- a method for preparing an organic electroluminescent device having a ternary doped hole transport layer comprises the following steps:
- ITO was sequentially ultrasonicated with detergent, deionized water, acetone, ethanol and isopropanol for 15 min to remove organic pollutants on the surface of ITO. After cleaning, it was subjected to oxygen plasma treatment.
- the oxygen plasma treatment time was lOmin, the power is 35W;
- the ternary doped hole transport layer being doped into a metal oxide by a cesium salt and a hole transport material Forming, the metal oxide material is ZnO, the strontium salt is CsF, the doping mass fraction of CsF is 2%, the hole transporting material is NPB, the doping mass fraction of NPB is 30%, and the ternary doping hole transport layer is The thickness is 50 nm; (3) first vapor-depositing the light-emitting layer, the light-emitting layer is Alq 3 , the doping mass fraction of the light-emitting layer is 10%, the thickness of the light-emitting layer is 20 nm, and then the electron transport layer is evaporated, and the electron transport layer is an electron transport material Bphen deposited on Formed on the light-emitting layer, the thickness of the electron transport layer is 60 nm, and then the electron injection layer and the anode are sequentially
- the structure of the organic electroluminescent device having the ternary doped hole transport layer prepared in this embodiment is as follows: ITO / (ZnO: NPB: CsF) / Alq 3 / Bphen / LiF / AL
- a method for preparing an organic electroluminescent device having a ternary doped hole transport layer comprises the following steps:
- AZO was first ultrasonicated with detergent, deionized water, acetone, ethanol and isopropanol for 15 min to remove organic pollutants on the surface of AZO. After cleaning, it was subjected to oxygen plasma treatment.
- the oxygen plasma treatment time was 5min, power is 50W;
- the ternary doped hole transport layer being doped into a metal sulfide by a cesium salt and a hole transport material Forming, the metal sulfide material is ZnS, the cerium salt is Cs 2 C0 3 , the doping mass fraction of Cs 2 C0 3 is 1%, the hole transporting material is TCTA, the doping mass fraction of TCTA is 40%, ternary doping
- the thickness of the hetero hole transport layer is 60 nm;
- the light-emitting layer is doped with Firpic in TCTA, the doping mass fraction of Firpic is 20%, the thickness of the light-emitting layer is 15 nm, and then the electron transport layer is evaporated, and the electron transport layer is an electron transport material TPBI
- the deposition is formed on the light-emitting layer, and then the electron injection layer and the anode are sequentially evaporated, the electron injection layer is NaF, the thickness of the electron injection layer is 0.5 nm, the cathode is Ag, and the thickness of the cathode is 80 nm, and finally the desired organic electrolysis is obtained.
- Light emitting device is doped with Firpic in TCTA, the doping mass fraction of Firpic is 20%, the thickness of the light-emitting layer is 15 nm, and then the electron transport layer is evaporated, and the electron transport layer is an electron transport material TPBI
- the deposition is formed on the light-emitting layer, and then the electron injection layer and the anode
- the structure of the organic electroluminescent device having the ternary doped hole transport layer prepared in this embodiment is as follows: AZO/(ZnS: TCTA: Cs 2 C0 3 ) / (TCTA: Firpic) / TPBI/NaF/Ag .
- a method for preparing an organic electroluminescent device having a ternary doped hole transport layer comprises the following steps:
- IZO was sequentially sonicated with detergent, deionized water, acetone, ethanol and isopropanol for 15 min to remove organic pollutants on the surface of IZO. After cleaning, it was subjected to oxygen plasma treatment.
- the oxygen plasma treatment time was 15min, power is 10W;
- the ternary doped hole transport layer being doped into a metal oxide by a cesium salt and a hole transport material Forming, the metal oxide material is Ti0 2 , the cerium salt is Cs 2 0, the doping mass fraction of Cs 2 0 is 5%, the hole transporting material is TAPC, the doping mass fraction of TAPC is 10%, ternary doping
- the thickness of the hole transport layer is 20 nm;
- the luminescent layer is doped with Ir(ppy) 3 in TPBI, the doping mass fraction of Ir(ppy) 3 is 10%, the thickness of the luminescent layer is 10 nm, and then the electron transport layer is evaporated.
- the electron transport layer is formed by depositing an electron transport material PBDI on the light-emitting layer, and then sequentially depositing the electron injection layer and the anode, the electron injection layer is CaF, the electron injection layer has a thickness of 5 nm, the cathode is Pt, and the cathode has a thickness of 250 nm.
- the desired organic electroluminescent device is obtained.
- a method for preparing an organic electroluminescent device having a ternary doped hole transport layer comprises the following steps:
- the luminescent layer is doped with Ir(MDQ) 2 (acac) in TAPC, the doping mass fraction of Ir(MDQ) 2 (acac) is 1%, and the thickness of the luminescent layer is 2 nm, then
- the electron transport layer is vapor-deposited, and the electron transport layer is formed by depositing an electron transport material TAZ on the light-emitting layer, and then sequentially depositing the electron injection layer and the anode, the electron injection layer is LiF, the thickness of the electron injection layer is 1 nm, the cathode is Au, and the cathode The thickness is 100 nm, and finally the desired organic electroluminescent device is obtained.
- the structure of the organic electroluminescent device having the ternary doped hole transport layer prepared in this embodiment is as follows: FTO / (PbS: PBD: CsN 3 ) / (TAPC: Ir(MDQ) 2 (acac)) / TAZ/LiF/Au.
- a method for preparing an organic electroluminescent device having a ternary doped hole transport layer comprises the following steps:
- ITO was sequentially ultrasonicated with detergent, deionized water, acetone, ethanol and isopropanol for 15 min to remove organic pollutants on the surface of ITO. After cleaning, it was subjected to oxygen plasma treatment.
- the oxygen plasma treatment time was lOmin, power is 30W;
- the ternary doped hole transport layer being doped into a metal oxide by a cesium salt and a hole transport material Forming, the metal oxide material is ZnO, the cerium salt is Cs 2 C0 3 , the doping mass fraction of Cs 2 C0 3 is 2%, the hole transporting material is TAPC, the doping mass fraction of TAPC is 30%, ternary doping
- the thickness of the hetero hole transport layer is 50nm;
- the light-emitting layer is DCJTB, the doping mass fraction of the light-emitting layer is 10%, the thickness of the light-emitting layer is 50 nm, and then the electron transport layer is evaporated, and the electron transport layer is an electron transport material Bphen deposited on the light-emitting layer.
- the layer was formed, and then the electron injecting layer and the anode were sequentially evaporated, the electron injecting layer was NaF, the thickness of the electron injecting layer was 4 nm, the cathode was A1, and the thickness of the cathode was 180 nm, and finally the desired organic electroluminescent device was obtained.
- the preparation and testing instruments used in the present invention are: high vacuum coating equipment (Shenyang Scientific Instrument Development Center Co., Ltd., pressure ⁇ 1 X 10-3Pa), current-voltage tester (USA) Keithly, model: 2602), electroluminescence optical tester (photo research company, model: PR650) and screen brightness meter (Beijing Normal University, model: ST-86LA).
- Example 2 is an organic electroluminescent device having a ternary doped hole transport layer prepared in Example 1 of the present invention: ITO / (ZnO: NPB: CsF) / Alq 3 / Bphen / LiF / Al and conventional organic electricity Photoluminescence device: Comparison of current efficiency and current density of ITO/Mo0 3 /NPB/Alq 3 /Bphen/LiF/Al.
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Abstract
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Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP11876608.8A EP2787548A4 (en) | 2011-11-28 | 2011-11-28 | ORGANIC ELECTROLUMINESCENCE DEVICE WITH TERNARIC DOPED HOLE TRANSPORT COATING AND METHOD OF MANUFACTURING THEREOF |
| US14/347,039 US20140319506A1 (en) | 2011-11-28 | 2011-11-28 | Organic electroluminescent device having ternary doped hole transportation layer and preparation method therefor |
| JP2014534909A JP5781700B2 (ja) | 2011-11-28 | 2011-11-28 | 三元ドーピングホール輸送層を有する有機エレクトロルミネセントデバイス及びその作製方法 |
| CN201180073513.XA CN103797600A (zh) | 2011-11-28 | 2011-11-28 | 一种具有三元掺杂空穴传输层的有机电致发光器件及其制备方法 |
| PCT/CN2011/083053 WO2013078595A1 (zh) | 2011-11-28 | 2011-11-28 | 一种具有三元掺杂空穴传输层的有机电致发光器件及其制备方法 |
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| PCT/CN2011/083053 WO2013078595A1 (zh) | 2011-11-28 | 2011-11-28 | 一种具有三元掺杂空穴传输层的有机电致发光器件及其制备方法 |
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| US (1) | US20140319506A1 (zh) |
| EP (1) | EP2787548A4 (zh) |
| JP (1) | JP5781700B2 (zh) |
| CN (1) | CN103797600A (zh) |
| WO (1) | WO2013078595A1 (zh) |
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| CN119866137A (zh) * | 2024-04-22 | 2025-04-22 | 广东聚华印刷显示技术有限公司 | 复合层及其制备方法、光电器件、显示装置 |
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| JP6041336B2 (ja) * | 2012-02-15 | 2016-12-07 | 国立大学法人山形大学 | 有機エレクトロルミネッセンス素子 |
| US11539014B2 (en) * | 2017-02-20 | 2022-12-27 | Novaled Gmbh | Electronic semiconducting device, method for preparing the electronic semiconducting device and compound |
| WO2018221173A1 (ja) * | 2017-06-02 | 2018-12-06 | コニカミノルタ株式会社 | 有機エレクトロルミネッセンス素子、表示装置及び照明装置 |
| JP7661674B2 (ja) * | 2019-12-03 | 2025-04-15 | 味の素株式会社 | 電子デバイスおよびペロブスカイト型太陽電池 |
| CN113517405B (zh) * | 2021-07-09 | 2023-04-18 | 广西大学 | 基于CsI离子掺杂空穴传输层的高性能自供电钙钛矿型光电探测器及其制备方法 |
| CN114249759B (zh) * | 2021-12-28 | 2023-06-30 | 吉林大学 | 硼杂z型并苯衍生物及其制备方法与应用 |
| CN116940148A (zh) * | 2022-04-01 | 2023-10-24 | 广东聚华印刷显示技术有限公司 | 发光二极管及显示装置 |
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| CN1913731A (zh) * | 2006-08-28 | 2007-02-14 | 清华大学 | 一种有机电致发光器件 |
| CN101488561A (zh) * | 2007-12-24 | 2009-07-22 | 三星Sdi株式会社 | 有机发光装置 |
| CN101673806A (zh) * | 2008-07-17 | 2010-03-17 | 加利福尼亚大学董事会 | 用于电子应用和电光应用的可溶液加工材料 |
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| JP2000340366A (ja) * | 1999-05-27 | 2000-12-08 | Tdk Corp | 発光ダイオード |
| KR20050015902A (ko) * | 2003-08-14 | 2005-02-21 | 엘지전자 주식회사 | 유기 el 소자 및 그 제조방법 |
| JP4629715B2 (ja) * | 2006-12-06 | 2011-02-09 | 韓國電子通信研究院 | Oled素子 |
| US20120138904A1 (en) * | 2007-09-21 | 2012-06-07 | Takahisa Shimizu | Organic electroluminescence display and production method thereof |
| US8183764B2 (en) * | 2008-03-26 | 2012-05-22 | Toppan Printing Co., Ltd. | Organic electroluminescence element, manufacturing method for an organic electroluminescence element and display unit |
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- 2011-11-28 JP JP2014534909A patent/JP5781700B2/ja active Active
- 2011-11-28 CN CN201180073513.XA patent/CN103797600A/zh active Pending
- 2011-11-28 WO PCT/CN2011/083053 patent/WO2013078595A1/zh not_active Ceased
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| CN1913731A (zh) * | 2006-08-28 | 2007-02-14 | 清华大学 | 一种有机电致发光器件 |
| CN101488561A (zh) * | 2007-12-24 | 2009-07-22 | 三星Sdi株式会社 | 有机发光装置 |
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| CN119866137A (zh) * | 2024-04-22 | 2025-04-22 | 广东聚华印刷显示技术有限公司 | 复合层及其制备方法、光电器件、显示装置 |
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| CN103797600A (zh) | 2014-05-14 |
| US20140319506A1 (en) | 2014-10-30 |
| JP5781700B2 (ja) | 2015-09-24 |
| EP2787548A1 (en) | 2014-10-08 |
| EP2787548A4 (en) | 2015-07-01 |
| JP2014532312A (ja) | 2014-12-04 |
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