WO2015109677A1 - 发光器件及其制作方法和显示面板 - Google Patents
发光器件及其制作方法和显示面板 Download PDFInfo
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- WO2015109677A1 WO2015109677A1 PCT/CN2014/076133 CN2014076133W WO2015109677A1 WO 2015109677 A1 WO2015109677 A1 WO 2015109677A1 CN 2014076133 W CN2014076133 W CN 2014076133W WO 2015109677 A1 WO2015109677 A1 WO 2015109677A1
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- Prior art keywords
- light
- light emitting
- quantum dots
- emitting device
- polyfluorene
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000002096 quantum dot Substances 0.000 claims abstract description 123
- 239000000463 material Substances 0.000 claims abstract description 82
- 229920002098 polyfluorene Polymers 0.000 claims abstract description 73
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000000758 substrate Substances 0.000 claims description 34
- 150000001875 compounds Chemical class 0.000 claims description 15
- 239000003960 organic solvent Substances 0.000 claims description 14
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 claims description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 8
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 8
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 6
- 229920005603 alternating copolymer Polymers 0.000 claims description 6
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 claims description 6
- 229930192474 thiophene Natural products 0.000 claims description 6
- 229910052733 gallium Inorganic materials 0.000 claims description 5
- 229910052738 indium Inorganic materials 0.000 claims description 5
- 239000004065 semiconductor Substances 0.000 claims description 5
- 235000010290 biphenyl Nutrition 0.000 claims description 4
- 239000004305 biphenyl Substances 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 4
- -1 octyl disubstituted anthracene Chemical class 0.000 claims description 4
- FNQJDLTXOVEEFB-UHFFFAOYSA-N 1,2,3-benzothiadiazole Chemical compound C1=CC=C2SN=NC2=C1 FNQJDLTXOVEEFB-UHFFFAOYSA-N 0.000 claims description 3
- 239000005964 Acibenzolar-S-methyl Substances 0.000 claims description 3
- 229910017115 AlSb Inorganic materials 0.000 claims description 3
- 229910004613 CdTe Inorganic materials 0.000 claims description 3
- 229910002601 GaN Inorganic materials 0.000 claims description 3
- 229910005540 GaP Inorganic materials 0.000 claims description 3
- 229910005542 GaSb Inorganic materials 0.000 claims description 3
- 229910001218 Gallium arsenide Inorganic materials 0.000 claims description 3
- 229910004262 HgTe Inorganic materials 0.000 claims description 3
- 229910007709 ZnTe Inorganic materials 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910052787 antimony Inorganic materials 0.000 claims description 3
- 229910052785 arsenic Inorganic materials 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 229910052793 cadmium Inorganic materials 0.000 claims description 3
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 claims description 3
- 239000003086 colorant Substances 0.000 claims description 3
- PJULCNAVAGQLAT-UHFFFAOYSA-N indeno[2,1-a]fluorene Chemical class C1=CC=C2C=C3C4=CC5=CC=CC=C5C4=CC=C3C2=C1 PJULCNAVAGQLAT-UHFFFAOYSA-N 0.000 claims description 3
- WPYVAWXEWQSOGY-UHFFFAOYSA-N indium antimonide Chemical compound [Sb]#[In] WPYVAWXEWQSOGY-UHFFFAOYSA-N 0.000 claims description 3
- 229910052753 mercury Inorganic materials 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 229910052711 selenium Inorganic materials 0.000 claims description 3
- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 229910052714 tellurium Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- AQLJEYYBSZJZAQ-UHFFFAOYSA-N 2-ethenylperoxythiophene Chemical compound C=COOc1cccs1 AQLJEYYBSZJZAQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910000673 Indium arsenide Inorganic materials 0.000 claims description 2
- RPQDHPTXJYYUPQ-UHFFFAOYSA-N indium arsenide Chemical compound [In]#[As] RPQDHPTXJYYUPQ-UHFFFAOYSA-N 0.000 claims description 2
- 229920000123 polythiophene Polymers 0.000 claims description 2
- VKYBUEJAQKBUFU-UHFFFAOYSA-N hexylhydrazine Chemical compound CCCCCCNN VKYBUEJAQKBUFU-UHFFFAOYSA-N 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 8
- 238000002360 preparation method Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 88
- 238000006862 quantum yield reaction Methods 0.000 description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 229910052732 germanium Inorganic materials 0.000 description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- YMMGRPLNZPTZBS-UHFFFAOYSA-N 2,3-dihydrothieno[2,3-b][1,4]dioxine Chemical compound O1CCOC2=C1C=CS2 YMMGRPLNZPTZBS-UHFFFAOYSA-N 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 2
- GPXJNWSHGFTCBW-UHFFFAOYSA-N Indium phosphide Chemical compound [In]#P GPXJNWSHGFTCBW-UHFFFAOYSA-N 0.000 description 2
- 229920000144 PEDOT:PSS Polymers 0.000 description 2
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- NIHNNTQXNPWCJQ-UHFFFAOYSA-N fluorene Chemical compound C1=CC=C2CC3=CC=CC=C3C2=C1 NIHNNTQXNPWCJQ-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 229920005604 random copolymer Polymers 0.000 description 2
- 230000001568 sexual effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- GKWLILHTTGWKLQ-UHFFFAOYSA-N 2,3-dihydrothieno[3,4-b][1,4]dioxine Chemical compound O1CCOC2=CSC=C21 GKWLILHTTGWKLQ-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000005424 photoluminescence Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000172 poly(styrenesulfonic acid) Polymers 0.000 description 1
- 229940005642 polystyrene sulfonic acid Drugs 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 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
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
- H10K85/10—Organic polymers or oligomers
- H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
- H10K85/115—Polyfluorene; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/88—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing selenium, tellurium or unspecified chalcogen elements
- C09K11/881—Chalcogenides
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- 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
- H10K50/115—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising active inorganic nanostructures, e.g. luminescent quantum dots
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- 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
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- 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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- 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
- H10K85/10—Organic polymers or oligomers
- H10K85/151—Copolymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/14—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/14—Macromolecular compounds
- C09K2211/1408—Carbocyclic compounds
- C09K2211/1416—Condensed systems
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/1201—Manufacture or treatment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Definitions
- the present invention relates to the field of display technologies, and in particular, to a light emitting device, a method for fabricating the same, and a display panel. Background technique
- Quantum dots are quasi-zero-dimensional nano-semiconductor materials composed of a small number of atoms or atomic groups. Usually, the three-dimensional scale is 1-10 nm.
- the quantum dots have unique photoluminescence and electroluminescence properties, and have low power consumption, high efficiency, and high response speed. Fast and light weight, with high academic value and good business prospects.
- Quantum dots can be applied to organic light-emitting devices by using the luminescent properties of quantum dots.
- quantum light is used to obtain white light in a light-emitting device, and is realized by a multilayer structure, that is, red light quantum dots, green light quantum dots, and blue light quantum dots are used.
- a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer are respectively formed, and the three light-emitting layers are in the form of hierarchical accumulation to obtain white light.
- An object of the present invention is to provide a light-emitting device and a method of fabricating the same, which simplifies the fabrication process of the light-emitting device and improves the performance of the light-emitting device.
- An aspect of the present invention provides a light emitting device including a white light emitting layer, wherein the white light emitting layer includes a polyfluorene blue light material, and red light quantum dots and green light quantum dots doped in the poly germanium blue light material .
- the white light emitting layer comprises a polyfluorene blue light material
- the polyfluorene blue light material has high thermal stability and chemical stability, has high fluorescence quantum yield, and has high luminous efficiency
- the white light emitting layer is doped with red light quantum dots and green light quantum dots in the polyfluorene blue light material
- the white light emitting layer is a single film layer structure, which can be formed at one time, and does not need to separately prepare a red light emitting layer, a green light emitting layer and a blue light emitting layer. Therefore, the process is simplified, the structure is simple, and mass production is easy.
- the doping ratio of the red light quantum dot, the green light quantum dot, and the polyfluorene blue light material is 0.5-0.8 : 1 : 1.1-1.4, to control the color gamut of white light within an acceptable range.
- the doping ratio of the red light quantum dots, the green light quantum dots, and the polyfluorene blue light material is 0.6-0.7:1: 1.2-1.3 to increase the color gamut of white light.
- the polyfluorene blue material is selected from one or more of the group consisting of: poly(9,9-dialkylfluorene), copolymer of bishexylfluorene and hydrazine, side
- the chain contains dendritic biphenyl, tetraalkyl-substituted indenofluorene polymer, polythiophene thiophene alternating copolymer, octyl disubstituted anthracene and benzothiadiazole alternating copolymer, hydrazine and thiophene, vinyl dioxythiophene , 4.7-dithiophene-2, 1,3-benzothiadiazole or 4.7-dithiophene-2, 1,3-benzoselenadiazole binary and ternary random copolymer.
- the red light quantum dots are II-VI compound compounds and the like.
- the red light quantum dots are compound semiconductor materials formed from Group II elements Zn, Cd, Hg and VI elements S, Se, Te, and the like.
- the red light quantum dots are ZnS, ZnSe, ZnTe, CdS, CdSe, CdTe, HgS, HgSe or HgTe.
- the green light quantum dots are Group III-V elemental compounds.
- the green light quantum dots are compounds formed from Group III B, Al, Ga, In and Group V N, P, As, Sb.
- the green light quantum dots are BN, BP, BAs, BSb, A1N, AlP, AlAs, AlSb, GaN, GaP, GaAs, GaSb, InAs, InP or InSb.
- a display panel includes: a color filter substrate and an array substrate, wherein the array substrate is provided with a plurality of pixel units, each of the pixel units having a plurality of sub-pixel units displaying different colors,
- the color filter is located between the white light emitting layer of the light emitting device and the color filter substrate.
- the white light emitting layer of the light emitting device comprises a polyfluorene blue light material, and the polyfluorene blue light material has high thermal stability and chemical stability, and has high fluorescence quantum yield and high luminous efficiency.
- the white light emitting layer is doped with the red light quantum dot and the green light quantum dot in the polyfluorene blue light material, and the white light emitting layer is a single film layer structure, which can be formed at one time, and does not need to separately prepare a red light emitting layer, a green light emitting layer and blue light emitting.
- the layer is simplified, the structure is simple, and it is easy to mass-produce.
- Another aspect of the present invention provides a method of fabricating a light emitting device, including: Forming an anode and a hole injection layer in sequence on the base substrate;
- the white light emitting layer comprising a polyfluorene blue light material, and red light quantum dots and green light quantum dots doped in the polyfluorene blue light material;
- An electron transport layer and a cathode are sequentially formed on the white light emitting layer.
- the method for fabricating a light emitting device forms a white light emitting layer comprising a polyfluorene blue light material and doping red light quantum dots and blue light quantum dots in the polyfluorene blue light material, because the polyfluorene blue light material has high thermal stability sexual and chemical stability, and high fluorescence quantum yield, so the luminous efficiency is high, and the white light emitting layer has a single film structure, which can be formed at one time, without separately preparing a red light emitting layer, a green light emitting layer and blue
- the luminescent layer is simplified, the structure is simple, and mass production is easy.
- the forming a white light emitting layer on the hole injecting layer comprises: dispersing polyfluorene and its derivative, red light quantum dot and green light quantum dot in a common ratio in an organic solvent. Forming a polyfluorene blue light material doped with red light quantum dots and green light quantum dots;
- a polyfluorene blue material doped with a red light quantum dot and a green light quantum dot is spin-coated on the hole injection layer to form a white light emitting layer.
- the doping ratio of polyfluorene and its derivatives, red light quantum dots, and green light quantum dots is controlled to adjust the color gamut of the desired white light.
- the polyfluorene and its derivatives, red light quantum dots, and green light quantum dots are co-dissolved in an organic solvent at a set ratio to form a polyfluorene blue light material doped with red light quantum dots and green light quantum dots, specifically including : Red light quantum dots, green light quantum dots, and polyfluorene and their derivatives are dissolved in an organic solvent at a doping ratio of 0.5 0.8 : 1 : 1.1 1.4 to form a polyfluorene doped with red quantum dots and green quantum dots.
- Blue light material to control the color gamut of white light within the effective range.
- the polyfluorene and its derivative, the red light quantum dot and the green light quantum dot are co-dissolved in an organic solvent at a set ratio to form a polyfluorene blue light material doped with a red light quantum dot and a green light quantum dot, and specifically include:
- the red light quantum dots, the green light quantum dots, and the polyfluorene and its derivatives are dissolved in an organic solvent at a doping ratio of 0.6-0.7:1: 1.2-1.3 to form a poly-doped quantum dot and a green quantum dot. ⁇ Blue light material to enhance the color gamut of white light.
- the organic solvent comprises toluene, chlorobenzene or chloroform to increase the yield of polyfluorene blue material doped with red light quantum dots and green light quantum dots.
- DRAWINGS Ml is a schematic cross-sectional structure of a light emitting device provided by an embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view of a display panel according to an embodiment of the present invention.
- FIG. 3 is a flowchart of a method for fabricating a light emitting device according to an embodiment of the present invention. detailed description
- Polyfluorene homopolymer has a large band gap and is a blue light-emitting material. It has high thermal stability and chemical stability due to its rigid in-plane biphenyl unit. It has a high solid state. Fluorescence quantum yield, high luminous efficiency.
- Embodiments of the present invention provide a light-emitting device of a quantum dot doped polyfluorene blue light emitting material, wherein the light emitting device includes a white light emitting layer 4, the white light emitting layer includes a poly germanium blue light material 401, and is doped in the poly germanium blue light material 401.
- a light emitting device includes a base substrate 1, an anode 2, a hole injection layer 3, a white light emitting layer 4, an electron transport layer 5, and a cathode 6.
- the base substrate 1 may be a substrate based on a transparent inorganic material such as a glass substrate or a quartz substrate, or may be a substrate of a transparent organic material, and the preparation process is simple and the technical threshold is low.
- the anode 2 formed on the base substrate 1 is a transparent electrode, and Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), Indium Gallium Zinc Oxide (Indium Gallium) may be used.
- ITO Indium Tin Oxide
- IZO Indium Zinc Oxide
- Indium Gallium Zinc Oxide Indium Gallium
- ITO Indium Tin Oxide
- IGZO Indium Tin Oxide
- IGZO Indium Zinc Oxide
- the hole injecting layer 3 is formed between the anode 2 and the white light emitting layer 4 in the embodiment of the present invention, and a material such as PEDOT: PSS (poly 3,4-ethylenedioxythiophene: polystyrenesulfonic acid) can be used.
- PEDOT poly 3,4-ethylenedioxythiophene: polystyrenesulfonic acid
- the white light emitting layer 4 is a single layer structure, and the white light emitting layer 4 includes a polyfluorinated blue light material 401 having high luminous efficiency, and red light quantum dots 402 and green light quantum dots doped in the polyfluorene blue light material 401. 403.
- the polyfluorene blue material 401 is a polyfluorene and a derivative thereof, including P17 poly(9,9-dialkylfluorene) (PDAFs), P18 (copolymer of bishexyl fluorene and hydrazine), P19 (side chain containing dendritic biphenyl), P21a (tetraalkyl substituted indenofluorene polymer), P23 (polyfluorene thiophene alternating copolymer), P24 ( An alternating copolymer of octyl disubstituted anthracene and benzothiadiazole), and anthracene with thiophene (Th;), ethylene dioxythiophene (EDT), 4.7-dithiophene-2, 1, 3-benzothiadiazole Binary and ternary random copolymers of (DBT), 4.7-dithiophene-2,1,3-benzoselenadiazole (BTSe).
- the red light quantum dot 402 and the green light quantum dot 403 are II-VI element compound and III-V element compound.
- the II-VI compound is a compound semiconductor material formed of Group II elements Zn, Cd, Hg and VI elements S, Se, Te.
- the II-VI compound has the formula ACIDB Vi;), namely ZnS, ZnSe, ZnTe, CdS, CdSe, CdTe, HgS, HgSe and HgTe.
- the III-V element compound is a compound formed by Group III B, Al, Ga, In and V group N, P, As, Sb, and the III-V compound is represented by ACin; >B (such as BN, BP, BAs, BSb, A1N, A1P, AlAs, AlSb, GaN, GaP, GaAs, GaSb, In As, InN, InP and InSb, and the like.
- the electron transport layer 5 is formed on the white light-emitting layer 4, and a material such as Alq3 can be used.
- the cathode 6 formed on the electron transport layer 5 in the embodiment of the present invention may be made of a material such as Ca/Al.
- the white light emitting layer comprises a polyfluorene blue light material, and the polyfluorene blue light material has high thermal stability and chemical stability, and has high fluorescence quantum yield, high luminous efficiency, and
- the polyfluorene blue material is doped with red light quantum dots and green light quantum dots, and the white light emitting layer has a single film layer structure, which can be formed into a film at one time, and does not need to separately prepare a red light emitting layer, a green light emitting layer and a blue light emitting layer, so the process is simplified.
- the structure is simple and easy to mass produce.
- the doping ratios of the red light quantum dot 402, the green light quantum dot 403, and the polyfluorene blue light material 401 are controllable by controlling the red light quantum dot 402 and the green light quantum.
- the doping ratio of point 403 and polyfluorene blue material 401 is adjusted to adjust the color gamut of the desired white light.
- the doping ratio of the red light quantum dot 402, the green light quantum dot 403, and the polyfluorene blue light material 401 is preferably 0.5 0.8 : 1: 1.1 to 1.4.
- the doping ratio of the red light quantum dot 402, the green light quantum dot 403, and the polyfluorene blue light material 401 is 0.6 ⁇ 0.7:1: 1.2 ⁇ 1.3, to improve the color gamut of white light.
- an embodiment of the present invention provides a display panel.
- the display panel includes a color filter substrate 10 and an array substrate 20.
- the array substrate 20 is provided with a plurality of pixel units (not shown). Each pixel unit has a plurality of sub-pixel units that display different colors.
- a light emitting device is disposed at a position of the array substrate 20 corresponding to each sub-pixel unit. 30.
- the light emitting device 30 is the light emitting device according to the above embodiment, comprising a substrate substrate 1, an anode 2, a hole injection layer 3, a white light emitting layer 4, an electron transport layer 5, and a cathode 6, wherein the white light emitting layer 4 includes a poly
- the ⁇ blue light material 401, and the red light quantum dots 402 and the green light quantum dots 403 doped in the polyfluorene blue light material 401 are capable of emitting white light when excited.
- a color filter 40 corresponding to each sub-pixel unit is disposed in the display panel, and the color filter 40 is located between the white light emitting layer 4 of the light emitting device 30 and the color filter substrate to achieve full color. display.
- the color filter 40 is located on the side of the color filter substrate 10 facing the array substrate 20, and is not limited thereto, and may be located on the array substrate 20. One side of the color filter substrate 10.
- the white light emitting layer of the light emitting device comprises a polyfluorene blue light material, and the polyfluorene blue light material has high thermal stability and chemical stability, and has high fluorescence quantum yield and high luminous efficiency.
- the white light emitting layer is doped with the red light quantum dot and the green light quantum dot in the polyfluorene blue light material, and the white light emitting layer is a single film layer structure, which can be formed at one time, and does not need to separately prepare a red light emitting layer, a green light emitting layer and blue light emitting.
- the display panel provided by the embodiment of the invention has the advantages of simple preparation process, good color rendering, high repeatability and low cost, and is combined with more mature color filter. The combination of light film technology enables full color display.
- the embodiment of the invention further provides a method for fabricating a light emitting device. As shown in FIG. 3, the method includes:
- the material of the base substrate may be a light-transmitting material such as glass or quartz, or an opaque material such as ceramic or semiconductor material, or a flexible material such as plastic.
- the anode is formed on the substrate, for example, by depositing.
- the anode may be made of an indium tin oxide (ITO) material as a transparent anode.
- ITO indium tin oxide
- a method such as spin coating, evaporation, or the like may be used to form on the ⁇ anode.
- PEDOT PSS hole injection layer.
- the polyfluorene and its derivative, the red light quantum dot and the green light quantum dot can be dissolved together in an organic solvent at a set ratio to form a polyfluorene blue light doped with a red light quantum dot and a green light quantum dot.
- the polyfluorene blue material doped with red quantum dots and green quantum dots is spin-coated on the hole injection layer to form a red light-emitting material including a polyfluorene blue light material and doped in the polyfluorene blue light material. And a white light emitting layer of green light quantum dots.
- the white light-emitting layer is formed on the hole injection layer, and the method of spin coating is not limited, and a method such as sputtering may be employed.
- red light quantum dots, green light quantum dots, and polyfluorene and derivatives thereof are dissolved in an organic solvent at a doping ratio of 0.5 0.8 : 1 : 1.1 1.4 to form a doping.
- a polyfluorene blue material having red light quantum dots and green light quantum dots to control the color gamut of white light within an effective range.
- the red light quantum dot, the green light quantum dot, the polyfluorene and the derivative thereof are preferably dissolved in an organic solvent at a doping ratio of 0.6-0.7: 1 : 1.2-1.3 to form a doped red light quantum dot.
- a green light quantum dot polyfluorene blue material to enhance the color gamut of white light.
- organic solvent involved in the above embodiments may be toluene, chlorobenzene or chloroform, etc., preferably toluene, to improve the yield of the polyfluorene blue material doped with red light quantum dots and green light quantum dots.
- S105 Forming an electron transport layer.
- Alq3 may be evaporated onto the white light emitting layer by vapor deposition on the white light emitting layer to form an electron transporting layer.
- a Ca/Al mixed electrode can be formed as a cathode by, for example, vapor deposition.
- the method for fabricating a light emitting device forms a white light emitting layer comprising a polyfluorene blue light material and doping red light quantum dots and blue light quantum dots in the polyfluorene blue light material, because the polyfluorene blue light material has high thermal stability sexual and chemical stability, and high fluorescence quantum yield, so the luminous efficiency is high, and the white light emitting layer has a single film structure, which can be formed at one time, without separately preparing a red light emitting layer, a green light emitting layer and blue
- the luminescent layer is simplified, the structure is simple, and mass production is easy.
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Abstract
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