CN109256472A - A kind of white light organic electroluminescent device of the double precursor structures of bilayer without wall - Google Patents

A kind of white light organic electroluminescent device of the double precursor structures of bilayer without wall Download PDF

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CN109256472A
CN109256472A CN201810900336.1A CN201810900336A CN109256472A CN 109256472 A CN109256472 A CN 109256472A CN 201810900336 A CN201810900336 A CN 201810900336A CN 109256472 A CN109256472 A CN 109256472A
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white light
luminescent
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organic electroluminescent
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陈平
李啊苏
段羽
欧世峰
程刚
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Jilin University
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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
    • H10K50/13—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 comprising stacked EL layers within one EL unit
    • 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
    • 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
    • H10K50/121—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising dopants for assisting energy transfer, e.g. sensitization
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60—Organic compounds having low molecular weight
    • H10K85/649—Aromatic compounds comprising a hetero atom
    • H10K85/656—Aromatic compounds comprising a hetero atom comprising two or more different heteroatoms per ring
    • H10K85/6565—Oxadiazole compounds
    • 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
    • H10K2101/00—Properties of the organic materials covered by group H10K85/00
    • H10K2101/10—Triplet emission

Abstract

The invention discloses a kind of white light organic electroluminescent devices of double precursor structures of the bilayer without wall, belong to organic electroluminescence device technical field.The device is successively made of substrate, anode, hole transmission layer, luminescent layer, electron transfer layer, cathode.There are two double parent organic luminous layers between hole transmission layer and electron transfer layer, organic luminescent dyes are entrained in double fertile materials in the form of dopant.Double precursor structures adulterate completion by hole transport layer material and electron transport layer materials according to a certain percentage, wherein the material doped ratio of luminescent layer hole-transporting layer close to anode is greater than the doping ratio in the luminescent layer of cathode.The present invention reduces interface potential barrier, is conducive to luminescent layer carriers balance transmission and exciton is uniformly distributed, it is easy to accomplish the high efficiency white light emission of spectrum-stable since luminescent layer uses the double precursor structures of the bilayer without wall.

Description

A kind of white light organic electroluminescent device of the double precursor structures of bilayer without wall
Technical field
The invention belongs to organic electroluminescence device technical fields, are related to a kind of double precursor structures of the bilayer without wall White light organic electroluminescent device.
Background technique
Organic electroluminescence device (OLED) becomes a new generation's display product after liquid crystal display (LCD), and solid State illumination aspect has huge potential advantages and broad application prospect.It is thin that the advantage of OLED is mainly reflected in thickness, quality Gently, high efficiency, high brightness is flexible, and wide viewing angle, low-voltage, manufacture craft is simple, and temperature-controllable is high, and material source is extensive, Without backlight etc..By the effort of nearly 30 years domestic and international researchers, OLED is progressed by phase of basic research Industrialization rank has been arrived, has been had an optimistic view of in the development prospect of lighting area by industry.It is issued according to market survey mechanism UBI Research OLED in 2017 illuminate annual report, OLED illumination market will rise to 21.1 hundred million from 6,400,000 dollars from 2017 to 2025 Dollar, average annual amplification is up to 107%.Although OLED illumination has huge market potential, there are also some in industrialized development Key Common Technologies need to break through, and all in all, the research of OLED illuminating device is still at an early stage.
Meet market needs to prepare the lighting source of high quality, the research of white light OLED (WOLED) seems outstanding For necessity [Adv. Mater. 2014,26,2459-2473；Chem. Soc. Rev. 2009, 38, 3391-3340； Chem. Soc. Rev. 2014, 43, 6439-6469；Chem. Soc. Rev. 2010, 39, 2387-2398]. WOLED not only can be complementary with inorganic light-emitting diode (LED) formation in lighting area, can also be in display field as liquid crystal The backlight of display technology, thus it is known as the main force of next-generation illumination, display technology.First WOLED device is in the world Report [Appl. Phys. Lett., 1994,64,815-817] for the first time is taught in 1994 by the J.Kido of Japan, it should The peak efficiency of device and maximum brightness are respectively 0.83 lm/W and 3400 cd/m2, which has established the research base of WOLED Plinth.
The half-peak breadth of luminous organic material can achieve 150-200 nm, therefore can be using red, green, blue three primary colours even The luminescent material of blue, yellow (or red) two kinds of complementary colors realizes high performance WOLED.Researcher reports various WOLED's Structure: (1) luminescent dye of different colours single layer more doped structures: is mixed in single luminescent layer；(2) multi-luminescent layer structure: The light of each luminescent layer transmitting different colours.(3) laminated construction: using intermediate electrode layer by the luminescence unit of different colours Vertical stacking gets up.Wherein the WOLED with multi-luminescent layer due to manufacture craft it is simple, high-efficient and cause the special of people Concern.By the effort of researcher and academia over more than 20 years, the performance of WOLED is improved rapidly, has multiple scientific researches Unit reports the WOLED that efficiency is more than energy-saving lamp.In addition the colour temperature of WOLED, colour rendering index obtain important breakthrough [Appl. Phys. Lett., 2009, 95, 013307-013309].In recent years, Jilin University realizes the yellow based on indigo plant of 70 cd/A The WOLED of complementary colours；South China Science & Engineering University has prepared the polymer white light device and headlamp of 30 lm/W using printing technology Tool；University Of Suzhou successfully develops the maximum WOLED illuminatian plate (110mm × 110mm) of state's inside dimension；Japanese Panasonic is public Department is using the efficiency of the WOLED of optical coupling technology preparation in 1000 cd/m2It is 133 lm/W under brightness；Toshiba develops Luminous efficiency is the WOLED of 91 lm/W；NEC and chevron university illustrate the white light parts of the cm of 2 cm × 2, which exists 1000 cd/m2When power efficiency reached 156 lm/W.
WOLED is compared with monochromatic light OLED device, and power efficiency is still lower.Influence WOLED device power efficiency because Element mainly has the following: 1. three or two luminescent materials are entrained in different luminescent layers by multi-luminescent layer structure respectively, The fertile material that each luminescent layer uses usually is different, the interface potential barrier between luminescent layer affect carrier transmission and The distribution of exciton.In addition, wall can also generate additional interface potential barrier between luminescent layer；2. lacking bipolarity fertile material； Since most of common fertile materials all have unipolarity carrier transmission characteristics, by electron transport material and hole transport material Material is doped the injection and transmission for capableing of equilbrium carrier as double parents.3. lacking the luminous material of high performance blue emitting phosphor Material；Up to the present, it is concentrated mainly in monochromatic OLED device using the luminescent device research of double precursor structures, white light parts report Road is less.
Summary of the invention
The present invention provides a kind of white light organic electroluminescent device of double precursor structures of bilayer without wall and its Preparation method.WOLED device of the present invention using blue, yellow (or red) two kinds of complementary colors, three color of red, green, blue is even red, Yellow, green, Lan Si kind color generates white light.WOLED device of the present invention uses the double parent knots of bilayer without wall Structure reduces the interface potential barrier between luminescent layer, is advantageously implemented the balance of luminescent layer carriers, while exciton is distributed It is more uniform, to obtain lower efficiency roll-off and stable luminescent spectrum.
The technical solution adopted by the invention is as follows:
A kind of white light organic electroluminescent device of the double precursor structures of bilayer without wall, including substrate, anode, hole biography Defeated layer, luminescent layer, electron transfer layer and cathode.There are 2 double parent organic luminous layers between hole transmission layer and electron transfer layer, Luminescent layer 1 and 2 overall thickness of luminescent layer are 10-30 nm, and organic luminescent dyes are entrained in double fertile materials in the form of dopant In.Double fertile materials adulterate completion by hole transport layer material and electron transport layer materials according to a certain percentage, and double parents shine The doping concentration of dyestuff is the wt% of 0.1 wt% ~ 30.Wherein the hole transport layer material doping ratio of double parents is big in luminescent layer 1 In the doping ratio of luminescent layer 2.Luminescent layer selects the triplet of fertile material that need to be greater than organic light emission dye in the luminescent layer The triplet of material is in favor of the energy transfer between parent, luminescent dye.Since luminescence unit uses double-deck double parent knots Structure reduces interface energy level potential barrier, is conducive to luminescent layer carriers balance transmission and exciton is uniformly distributed, to be conducive to reality The high efficiency WOLED of existing spectrum-stable.
Fertile material: fertile material can be TCTA, MCP, CBP, TPBi, BmPyPhB, Tmpypb, 9,9'- (2,6- pyrroles Pyridine diyl two -3, the Asia 1- benzene) double -9H- carbazoles (26DCzPPy), 9,9- two fluorenes of spiral shell-diphenyl phosphine oxide (SPPO1) or 2,2'- (1,3- phenyl) two [5- (4- tert-butyl-phenyl) -1,3,4- oxadiazoles] (OXD-7), any efficient fertile material are ok It uses.
Organic luminescent dyes: fluorescence luminescent material or phosphorescent light-emitting materials, such as two (4,6- difluorophenyls can be used Pyridine-C2, N) pyridinecarboxylic conjunction iridium Bis [2- (4,6-difluorophenyl) pyridinato-C2, N] (picolinato) Iridium (III), FIrPic), three (2- phenylpyridine-C2, N) close iridium (III) (Tris (2-phenylpyridinato- C2,N)iridium(III), Ir(ppy)3), acetopyruvic acid two (1- phenyl isoquinolin quinoline-C2, N) closes iridium (III) (Bis (1- phenyl-isoquinoline-C2,N) (acetylacetonato)iridium (III),Ir(piq)2(acac)), acetyl Pyruvic acid two (2- phenylbenzothiazol-C2, N) closes (III) (Bis (2-phenyl-benzothiazole-C2, N) (acetylacetonate)iridium(III), Ir(bt)2(acac)), (1- phenyl isoquinolin quinoline) iridium (Tris (1- phenylisoquinoline)iridium(III), Ir(piq)3) or (acetylacetone,2,4-pentanedione) bis- (2- methyldiphenyl simultaneously [f, h] quinolines Quinoline) close iridium ((Bis (2-methyldibenzo [f, h] quinoxaline) (acetylacetonate) iridium (III), Ir(MDQ)2(acac)) etc., any efficient luminescent dye can use.Electron transfer layer；Electron transfer layer Material uses the higher organic material of electron mobility, such as 1,3,5- tri- (1- phenyl -1H- benzimidazolyl-2 radicals-yl) benzene (1,3, 5-Tris (1-phenyl-1H-benzimidazol-2-yl)-benzene, TPBi), 1,3,5- tri- [(3- pyridyl group) -3- Phenyl] benzene (1,3,5-Tri [(3-pyridyl)-phen-3-yl] benzene, Tmpypb), 2,9- dimethyl -4,7- biphenyl - 1,10- phenanthroline (2,9-Dimethyl- 4,7-diphenyl-1,10-phenanhroline, BCP), 4,7- diphenyl -1, 10- phenanthroline (4,7-diphenyl-1,10-Phenanthroline, Bphen), three (8-hydroxyquinoline) aluminium (Aluminum Tris (8-Hydroxyquinolinate), Alq3), 1,3- bis- (3,5- bis- (pyridin-3-yl) phenyl] benzene (1,3-Bis [3, 5-di (pyridin-3-yl) phenyl] benzene, BmPyPhB) etc..
Hole transmission layer；Hole transport layer material uses the higher organic material of hole mobility, such as 4,4'- cyclohexyl Two [N, N- bis- (4- aminomethyl phenyl) aniline] (Di- [4- (N, N-ditolyl-amino)-phenyl] cyclohexane, TAPC), N, N'- diphenyl-N, N'- (1- naphthalene) -1,1'- biphenyl -4,4'- diamines, (N, N'-Bis- (1- Naphthalenyl) N, N'-bis-phenyl- (1,1'-biphenyl) -4,4'-diamine, NPB), 4,4', 4''- tri- (carbazole -9- base) triphenylamine (4,4', 4''-Tris (carbazol-9-yl)-triphenylamine, TCTA), 1,3- bis- - 9- carbazyl benzene (1,3-Di-9-carbazolylbenzene, MCP), (the N-3- methylphenyl-N-phenyl ammonia of 4,4', 4''- tri- Base) triphenylamine (4,4', 4''-Tris (N-3-methylphenyl-N-phenyl-amino, triphenylamine), m- MTDATA), 4,4'- bis- (9- carbazole) biphenyl (4,4'-Bis (N-carbazolyl) -1,1'-biphenyl, CBP), N, N'- Diphenyl-N, N'- bis- (3- aminomethyl phenyl) -1,1'- biphenyl -4,4'- diamines (N, N'-Bis (3-methylphenyl)-N, N'- Bis (phenyl) benzidine, TPD) etc..
Substrate；Substrate material can be rigid substrate such as glass, silicon etc. or flexible substrate such as poly terephthalic acid second two Alcohol ester, polymethyl methacrylate etc.；
Anode；Anode can be any anode material such as transparent metal oxide ITO, FTO, high-work-function metal Ag, Au, Cu Deng graphene, graphene composite film.Anode modification layer uses the Al of atomic layer deposition (ALD) technology preparation2O3, zinc oxide aluminum (ZnO:Al) etc., anode buffer layer can be inserted among anode and luminescence unit layer and improve the injection in hole.Anode is repaired The thickness of decorations layer is generally less than 2 nm.
Cathode；Cathode can such as have Al, Ca, Ba metal of low work function, graphene, graphene for any cathode material Laminated film.Cathodic modification layer uses ZnO, TiO of ALD technique preparation2、ZrO2Deng being inserted between cathode and electron transfer layer For improving the injection of electronics.The thickness of cathodic modification layer is generally less than 2 nm.
WOLED fertile material of the present invention by hole mobile material and electron transport material with certain proportion doping and At.Luminescent layer is using double-deck double precursor structures, wherein double parent luminescent layer hole transport performances close to hole transmission layer side Good, another double parent luminescent layer electronic transmission performance close to electron transfer layer are good.The double parent knots of the bilayer that the present invention designs The injection of structure carrier more balances, and is distributed in inside luminescent layer so that exciton is highly uniform, without being collected on interface, Reduce being quenched for triplet excitons, is very beneficial for the recombination luminescence of exciton.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the current density voltage curve of white light organic electroluminescent device of the invention.
Fig. 3 is the brightness-voltage curve of white light organic electroluminescent device of the present invention；
Fig. 4 is the Current efficiency-voltage curve of white light organic electroluminescent device of the present invention.
Fig. 5 is the electroluminescent spectrum of white light organic electroluminescent device of the present invention at different brightnesses.
In figure: 1 substrate；2 anodes；3 hole transmission layers；4 luminescent layers；5 electron transfer layers；6 cathodes.
Specific embodiment
Specific embodiments of the present invention are described in detail below in conjunction with technical solution and attached drawing.
The material that the embodiment of the present invention refers to is all from commercial product.
ITO: tin indium oxide；As transparent anode.
ZnO:Al: zinc oxide aluminum；Decorative layer as ito anode is conducive to the injection in hole.
TCTA:4,4', 4''- tri- (carbazole -9- base) triphenylamine；As hole transport layer material, cavity transmission ability is strong. BmPyPhB:1,3- bis- (3,5- bis- (pyridin-3-yl) phenyl] benzene；It is used as electron transport layer materials, electron transport ability is strong.
TCTA:BmPyPhB: the parent as blue emitting phosphor and yellow phosphor material adulterates according to a certain percentage, improves electricity Sub, hole transmittability.
FIrPic: two (4,6- difluorophenyl pyridinato-C2, N) pyridinecarboxylics close iridium；Efficient blue emitting phosphor shines material Material.
Tetra-Pt-N: efficient yellow phosphor platinum complex luminescent material.
ZnO: zinc oxide；Cathodic modification layer is conducive to the injection of electronics.
Al: aluminium；Thickness uses 10nm, is used as cathode.
Embodiment 1:
The preparation of organic luminescent device can be by carrying out in multi-source organic molecule gas-phase deposition system, and detailed process is as follows:
[1] the selected substrate of experiment is ITO electro-conductive glass.Firstly, with acetone, dehydrated alcohol, deionized water to ito glass Tow sides are cleaned repeatedly to remove the impurity on surface and metal ion.
[2] the ITO substrate of wiped clean is successively used into acetone, ethyl alcohol, deionized water ultrasound 10 minutes, is carried out after drying purple Outer processing 10 minutes.
[3] ito glass handled well is placed on multi-source organic-metal molecules glove box in a manner of face down In gas-phase deposition system.(referring to Chinese patent: ZL03110977.2, " the increasing cooking-pot type for organic electroluminescent coating machine evaporates Source "), vapor deposition platform is interior to contain 10 organic evaporating sources, and 4 devices, each evaporation can be deposited in 3 metal electrode evaporation sources every time It is independent of each other between source, avoids the pollution of storeroom.In device fabrication process, multi-source organic molecule gas-phase deposition system Vacuum degree is about 3 × 10-4Start growth material when Pa, the vacuum degree highest of system can achieve 10-5Pa.The thickness of Material growth Degree and growth rate are controlled by film-thickness monitoring, and organic material growth rate is controlled in 1/s.The electroluminescent light of device Spectrum and chromaticity coordinates are measured by spectrometer PR655, and luminance-voltage and current-voltage characteristic are by spectrometer and programmable electricity Flowmeter Keithley 2400, which is combined, to be measured.All tests are completed in atmosphere at room temperature.
[4] this example is a kind of high performance white light organic electroluminescent device, device architecture are as follows: ITO/ ZnO:Al (2 Nm)/TCTA (50 nm)/TCTA:BmPyPhB:tetra-Pt-N (1:1,10%, 5 nm)/TCTA:BmPyPhB: FIrPic (1:2,10 wt %, 15 nm)/BmPyPhB (30 nm)/ZnO (1 nm)/Al (100 nm).Yellow light emitting TCTA:BmPyPhB=1:1 in layer, TCTA:BmPyPhB=1:2 in blue light-emitting.
Current density voltage curve, brightness-voltage curve, the Current efficiency-voltage curve of WOLED device of the invention With normalization electroluminescent spectrum respectively such as Fig. 2, Fig. 3, Fig. 4, shown in Fig. 5.It can be seen from the figure that based on double-deck double parent knots The high performance white light organic electroluminescent device of structure has good photoelectric properties, and maximum current efficiency is up to 59.2 cd/A. Light emission luminance is by 1000 cd/m2Change to 10000 cd/m2, current efficiency is down to 49.6 cd/ A, efficiency from 58.5 cd/A It roll-offs very slowly, the reduction that this is attributed to the broadening of exciton recombination region and triplet-triplet exciton is buried in oblivion.Due to adopting With double-deck double precursor structures, the interface potential barrier between two luminescent layers is being eliminated under suitable doping ratio, is achieving 2.7 V Low turn-on voltage, realize the power efficiency of up to 60.4 lm/W.In addition, from fig. 5, it can be seen that under different brightness Electroluminescent spectrum be kept approximately constant, obtain quite stable warm white.

Claims (10)

1. a kind of white light organic electroluminescent device of the double precursor structures of bilayer without wall, including substrate, anode, hole Transport layer, luminescent layer, electron transfer layer and cathode；It is characterized by:
There are two double parent organic luminous layers between the hole transmission layer and the electron transfer layer, two luminescent layers are total With a thickness of 10-30nm, it is entrained in double fertile materials and is constituted in the form of dopant by organic luminescent dyes, machine luminescent dye Doping concentration is 0.1 wt% ~ 30wt%；Double fertile materials by hole transport layer material and electron transport layer materials according to Ratio doping is completed, and the material doped ratio of luminescent layer hole-transporting layer close to anode is greater than in the luminescent layer of cathode Doping ratio；Luminescent layer selects the triplet of fertile material need to be greater than the triplet state energy of organic luminescent dyes in the luminescent layer Grade；
The fertile material be TCTA, MCP, CBP, TPBi, BmPyPhB, Tmpypb, 9,9'- (2,6- pyridine diyls two -3, The Asia 1- benzene) double -9H- carbazoles (26DCzPPy), 9,9- two fluorenes of spiral shell-diphenyl phosphine oxide (SPPO1) or 2,2'- (1,3- phenyl) two [5- (4- tert-butyl-phenyl) -1,3,4- oxadiazoles] (OXD-7)；
The hole transmission layer organic material high using hole mobility, including 4, [(the 4- first of N, N- bis- of 4'- cyclohexyl two Base phenyl) aniline], N, N'- diphenyl-N, N'- (1- naphthalene) -1,1'- biphenyl -4,4'- diamines, 4,4', tri- (carbazole-of 4''- 9- yl) triphenylamine, bis- -9- carbazyl benzene of 1,3-, 4,4', 4''- tri- (N-3- methylphenyl-N-phenyl amino) triphenylamine, 4, (9- carbazole) biphenyl of 4'- bis- or N, N'- diphenyl-N, N'- bis- (3- aminomethyl phenyl) -1,1'- biphenyl -4,4'- diamines；
The electron transport layer materials are 1,3,5- tri- (1- phenyl -1H- benzimidazolyl-2 radicals-yl) benzene, [(the 3- pyrrole of 1,3,5- tri- Piperidinyl) -3- phenyl] benzene, 2,9- dimethyl -4,7- biphenyl -1,10- phenanthroline, 4,7- diphenyl -1,10- phenanthroline, three (8- Oxyquinoline) and aluminium or 1,3- bis- (3,5- bis- (pyridin-3-yl) phenyl] benzene.
2. white light organic electroluminescent device according to claim 1, it is further characterized in that: the organic luminescent dyes For acetopyruvic acid two (1- phenyl isoquinolin quinoline-C2, N) close iridium, two (4,6- difluorophenyl pyridinato-C2, N) pyridinecarboxylics close iridium, Acetopyruvic acid two (2- phenylbenzothiazol-C2, N) closes iridium, three (2- phenylpyridine-C2, N) close iridium or (1- phenyl isoquinolin quinoline) Iridium or (acetylacetone,2,4-pentanedione) bis- (2- methyldiphenyls simultaneously [f, h] quinoxaline) close iridium.
3. white light organic electroluminescent device according to claim 1 or 2, it is further characterized in that: the substrate is rigid Property substrate or flexible substrate.
4. white light organic electroluminescent device according to claim 3, it is further characterized in that: the rigid substrate is glass Glass or silicon, the flexible substrate are polyethylene terephthalate or polymethyl methacrylate.
5. white light organic electroluminescent device according to claim 1 or 2, it is further characterized in that: the anode material For ITO, FTO, Ag, Au, Cu, graphene or graphene composite film；Anode modification layer is using technique for atomic layer deposition preparation Al2O3Or zinc oxide aluminum.
6. white light organic electroluminescent device according to claim 3, it is further characterized in that: the anode material is ITO, FTO, Ag, Au, Cu, graphene or graphene composite film；Anode modification layer is using technique for atomic layer deposition preparation Al2O3Or zinc oxide aluminum.
7. white light organic electroluminescent device according to claim 4, it is further characterized in that: the anode material is ITO, FTO, Ag, Au, Cu, graphene or graphene composite film；Anode modification layer is using technique for atomic layer deposition preparation Al2O3Or zinc oxide aluminum.
8. white light organic electroluminescent device described according to claim 1 or 2 or 4 or 6 or 7, it is further characterized in that: it is described Cathode is Al, Ca, Ba, graphene or graphene composite film；Cathodic modification layer uses ZnO, TiO of ALD technique preparation2Or ZrO2。
9. white light organic electroluminescent device according to claim 3, it is further characterized in that: the cathode be Al, Ca, Ba, graphene or graphene composite film；Cathodic modification layer uses ZnO, TiO of ALD technique preparation2Or ZrO2。
10. white light organic electroluminescent device according to claim 5, it is further characterized in that: the cathode be Al, Ca, Ba, graphene or graphene composite film；Cathodic modification layer uses ZnO, TiO of ALD technique preparation2Or ZrO2。
CN201810900336.1A 2018-08-09 2018-08-09 A kind of white light organic electroluminescent device of the double precursor structures of bilayer without wall Pending CN109256472A (en)

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WO2021189498A1 (en) * 2020-03-27 2021-09-30 京东方科技集团股份有限公司 Display device, and display panel and manufacturing method therefor
CN114725293A (en) * 2022-03-09 2022-07-08 吉林大学 Stable white light OLED (organic light emitting diode) with multi-luminescent layer mixed matrix structure without transmission layer

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