CN101051673B - Organic electroluminescence device capable of emitting green light, purple light and white light - Google Patents
Organic electroluminescence device capable of emitting green light, purple light and white light Download PDFInfo
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Abstract
The organic electroluminescence device includes transparence substrate, anode layer, and catodic layer. Organic functional layer (OFL) is setup on an electrode located on surface of transparence substrate between anode layer, and catodic layer. OFL includes at least luminous layer, which can be luminescent material layer (LML) of emitting blue light and yellow light or green light. Driven by external electrical source, LML of emitting green light and red light can emit white light, or blue, purple lights. Characters are that LML of emitting blue light is constituted from OFL including compounds of diamines in aromatic, or of star diphenylamine, or polymer in carbazole group, possessing capability of transferring cavities. Yellow LML can be rubrene or silole or DCM series. Green LML is OFL (can be 8- hydroxy quinoline aluminum) possessing capability of transferring electrons. Red LML is DCJTB etc series of red light material.
Description
Technical field
The present invention relates to technical field of organic electroluminescence in the electronic devices and components, relate to the organic electroluminescence device of a kind of white of new structure and cyan, purple.
Background technology
At present, Display Technique develops into the up-to-date display unit of present appearance by hot cathode ray tube (CRT), the LCD (LCD) in past.At the difference of application, it is particularly urgent that the demand of large-sized monitor and micro-display seems.Three kinds of novel flat-plate display-plasma displays (PDP) of Chu Xianing, Field Emission Display (FED) and display of organic electroluminescence (OLED) have in recent years all remedied the deficiency of CRT monitor and LCD (LCD) to a certain extent.Wherein, the organic electroluminescent technology provides technical support for little demonstration, because display of organic electroluminescence has significant advantage: from main light emission, low-voltage DC driven, high-low temperature resistant, complete curings, wide visual angle, color enrich, do not need backlight, the visual angle is big, power is low, response speed can reach LCD 1000 times, and its manufacturing cost is lower than the LCD of equal resolution, therefore, display of organic electroluminescence becomes the focus of people's research.
But the previous research work of OLED does not obtain the achievement that attracts people's attention, and what restrict its development is the application of material and the variation of device architecture.The device architecture of preparation is simple, mostly is single layer device greatly, and efficient is low, the driving voltage height, and luminosity is low.
Up to 1987, people such as the C.W.Tang of Kodak were summing up the device of having invented sandwich structure on forefathers' the basis: they adopt, and fluorescence efficiency is very high, electronic transmission performance and the good organic small molecule material oxine aluminium (Alq of filming performance
3), with the aromatic diamine with hole transport characteristic (diamine) derivative make low driving voltage (＜10V), high-quantum efficiency (1%), high brightness (〉 1000cd/m
2) organic EL device, this breakthrough has remotivated the enthusiasm of people for organic EL, makes people see the hope of organic electroluminescence device as flat-panel display device of new generation.From then on, organic electroluminescent has been gone on the road that develops rapidly, and people are synthetic at material, the device architecture design, and all many-sides such as carrier transport have been carried out deep research, make the performance of organic electroluminescence device move closer to the practicability level.Nineteen ninety Friend group has reported high molecule electroluminescent phenomenon under low-voltage, has opened the frontier of the organic flat panel display research of macromolecule; 1997, F
Rrest etc. find the phosphorescence electro optical phenomenon, break through the electroluminescent organic material quantum efficiency and be lower than 25% restriction, make the research of organic flat-panel display device enter a new period ... in short 10 years, the organic electroluminescent technology inorganic display material 30 years of development courses of having passed by, and the industrialization impetus is swift and violent unusually.
Organic elctroluminescent device is as a kind of novel photoconductive organic semiconductor information functional material and solid plate display device, and development in recent years is very fast.White light organic electroluminescent display device is the hot topic of OLED research and development in recent years especially, because white light is contained red, green, blue three kinds of primary colours of whole visible region, easily be converted to full color display device, this is one of best approach that obtains at present the full color demonstration, also will be OLED device practicability, a commercial cutting point.White light organic electroluminescent device life-span, problems such as colorimetric purity and stability are the stumbling-blocks of restriction its practicability and industrialization always.Complex devices structure and manufacturing process have had a strong impact on its industrialization especially at present, and high manufacturing cost all makes its application reduce with the device performance that is difficult to repetition.
Although the OLED technology has obtained significant progress in recent years, still there are a lot of bottlenecks in present technology in the organic electroluminescent field.No matter be that organic electroluminescence device is realized full-colorization demonstration, still use as single mains lighting supply, the device preparation that can send white light all is vital, and their constructional simplicity, high brightness, high efficiency, long-life all are the key factors that influences device practicability; Especially utilize known material, adopt the structure simple device of trying one's best,, realize the luminous of white, and obtain device aspect efficiently, be worth people to go continuous exploration especially as non-doping means with good photoelectric properties.
Summary of the invention
Technical problem to be solved by this invention is how to provide a kind of energy can send the organic electroluminescence device of blue or green light, purple light and white light, purpose is to utilize the fluorescent material of conventional function admirable, can be used as the functional material in the organic layer, the component of the 26S Proteasome Structure and Function layer by changing device prepares the organic luminescent device of high performance white or cyan, purple.
Technical problem proposed by the invention is to solve like this: construct and a kind ofly can send blue or green light, the organic electroluminescence device of purple light and white light, comprise transparent substrates, anode layer and cathode layer, wherein a kind of electrode is provided with organic function layer between transparent substrates described anode layer in surface and cathode layer, which comprises at least luminescent layer, this luminescent layer can be to send the fluorescent material layer of blue light and send the fluorescent material layer of gold-tinted or send the fluorescent material layer of green glow, send the fluorescent material layer and the fluorescent material layer that sends ruddiness of green glow, under the driving of additional power source, can send white light or blue or green light, purple light, it is characterized in that: the fluorescent material layer of described blue light is made of the organic functional material with cavity transmission ability, this has the organic functional material aromatic diamine compounds or the star triphenyl amine compound of cavity transmission ability, or carbazole polymer; Described Yellow luminous layer can be yellow fluorescent material itself as rubrene or silole, also can be (orange) red material such as DCM series; The fluorescent material layer of described green glow can be: have the organic functional material of electron transport ability, as: perhaps oxine aluminium (Alq
3) etc., the fluorescent material layer of described ruddiness is red light material series such as DCJTB.
Can send blue or green light according to provided by the present invention, the organic electroluminescence device of purple light and white light, it is characterized in that, described aromatic diamine compounds or star triphenyl amine compound can be N, N '-two-(3-aminomethyl phenyl)-N, N '-diphenyl-[1,1 '-xenyl]-4,4 '-diamines or N, N '-two (3-naphthyl)-N, N '-diphenyl-[1,1 '-diphenyl]-4,4 '-diamines or three-[4-(5-phenyl-2-thienyl) benzene] amine, described carbazole polymer can be a polyvinylcarbazole, m-TDATA, DPVBi, BAlq, BCzVB, Perylene, among the BczVBi etc. one or more.
According to the organic electroluminescence device that can send blue or green light, purple light and white light provided by the present invention, it is characterized in that, described cathode layer and anode layer are respectively arranged with implanted layer, described organic function layer also comprises electron transfer layer, hole transmission layer and the hole blocking layer with electron transport ability, described electron transfer layer and implanted layer can be metal complex material Huo person oxadiazole electron-like transferring material, perhaps imidazoles electron transport material; Described hole transport layer material can be aromatic diamine compounds or star triphenyl amine compound, or carbazole polymer.
According to the organic electroluminescence device that can send blue or green light, purple light and white light provided by the present invention, it is characterized in that, the described used material of hole blocking layer with electron transport ability is the class material with electron transport ability and energy blocking hole, can be in poly-N-vinylcarbazole, BCP, two (2-methyl-8-quinoline acid group closes) tri-phenyl-silane aluminium alcoholates (III), two (2-methyl-8-quinoline acid group closes) 4-phenol aluminium (III) or two (2-methyl-8-quinoline acid group closes) the 4-phenylphenol aluminium (III) one or more.
Can send the organic electroluminescence device that can send blue or green light, purple light and white light according to provided by the present invention, it is characterized in that, described metal complex material has the compounds that central metal atom constitutes, and can be oxine aluminium (A1q
3) or oxine gallium (Gaq
3) or two [2-(2-hydroxy phenyl-1)-pyridine] beryllium (Bepp
2) etc., transmission of Suo Shu oxadiazole electron-like and injection material can be 2-(4-diphenyl)-5-(4-2-methyl-2-phenylpropane base)-1,3,4-oxadiazole (PBD), described imidazoles electric transmission and injection material can be 1,3,5-three (N-phenyl-2-benzimidazolyl-2 radicals) benzene (TPBI); Described aromatic diamine compounds can be N, N '-two-(3-aminomethyl phenyl)-N, N '-diphenyl-[1,1 '-xenyl]-4,4 '-diamines (TPD) or N, N '-two (3-naphthyl)-N, N '-diphenyl-[1,1 '-diphenyl]-4,4 '-diamines (NPB) and derivative thereof, described star triphenyl amine compound can be three-[4-(5-phenyl-2-thienyl) benzene] amine (PTDATA series), and described carbazole polymer can be polyvinylcarbazole (PVK) or monomer whose.
According to the organic electroluminescence device that can send blue or green light, purple light and white light provided by the present invention, it is characterized in that, described transparent substrates can be glass or flexible substrate or sheet metal etc., and wherein flexible substrate can be ultra-thin solid-state thin slice, polyesters or poly-phthalimide compounds etc.; Described anode layer can be metal-oxide film or metallic film, and this metal-oxide film can be ito thin film or zinc-oxide film or zinc tin oxide film, and this metallic film also can be the higher metallic films of work function such as gold, copper, silver; Described anode layer can be PEDOT: PSS or PANI class organic conductive polymer; Described anode implanted layer and resilient coating can be the inorganic molecules compounds or have the organic compound of low the highest occupied energy level (HOMO) energy level, as phthalein cyanogen copper (CuPc) and silicon dioxide (SiO
2); Described cathode layer comprises resilient coating and metal level, described cushioning layer material is the inorganic molecules compound or has the organic compound of high minimum unoccupied energy level (LUMO) energy level, for example LiF or CsF, described metal layer material is metallic film or alloy firm, and this metallic film can be the alloy firm of the lower metallic film of lithium or work functions such as magnesium or calcium or strontium or aluminium or indium or they and copper or gold or silver etc.
The preparation method that this can send the organic electroluminescence device of blue or green light, purple light and white light may further comprise the steps:
1. utilize washing agent, ethanolic solution and deionized water that transparent substrates is carried out ultrasonic cleaning, clean the back and dry up with drying nitrogen;
2. transparent substrates is sent to the preparation of carrying out electrode in the vacuum evaporation chamber, described electrode comprises anode layer or cathode layer;
The transparent substrates that 3. will prepare electrode moves into vacuum chamber, under oxygen pressure ring border to carrying out the preliminary treatment of low energy oxygen plasma;
4. the transparent substrates after will handling begins to carry out the evaporation of organic film in the vaporization chamber of condition of high vacuum degree, according to device architecture evaporation organic function layer successively, described organic function layer comprise luminescent layer, carrier blocking layers and (or) implanted layer and resilient coating;
5. finish another electrode is carried out in the back in the vacuum evaporation chamber preparation at the organic layer evaporation, described electrode comprises cathode layer or anode layer;
6. ready-made device is sent to glove box and encapsulates, glove box is a nitrogen atmosphere;
7. electric current-the voltage of test component-light characteristic, the luminescent spectrum parameter of test component simultaneously.
Provide another kind can send the preparation method of the organic electroluminescence device of blue or green light, purple light and white light, it is characterized in that, may further comprise the steps:
1. utilize washing agent, ethanolic solution and deionized water that transparent substrates is carried out ultrasonic cleaning, clean the back and dry up with drying nitrogen;
2. transparent substrates is sent to the preparation of carrying out electrode in the vacuum evaporation chamber, described electrode comprises anode layer or cathode layer;
The transparent substrates that 3. will prepare electrode moves into vacuum chamber, under oxygen pressure ring border to carrying out the preliminary treatment of low energy oxygen plasma;
4. the transparent substrates after will handling is carried out the spin coating of organic film in spin coater, according to device architecture spin coating organic function layer successively, described organic function layer comprise luminescent layer, carrier blocking layers and (or) implanted layer and resilient coating;
5. finish to carry out in the vaporization chamber of back at condition of high vacuum degree the preparation of another electrode in the organic layer spin coating, described electrode comprises cathode layer or anode layer;
6. ready-made device is sent to glove box and encapsulates, glove box is a nitrogen atmosphere;
7. electric current-the voltage of test component-light characteristic, the luminescent spectrum parameter of test component simultaneously.
Organic electroluminescence device provided by the present invention, material therefor are organic substance/macromolecule, thereby range of choice is wide, can realize the demonstration of white light or blue or green light, purple light; Related material is the organic semiconducting materials of the function admirable of routine, obtain device efficiently, synthetic and the device technical maturity of material therefor, cost are low, compare with the device that obtains function admirable by synthetic new material of cost plenty of time, this research has been opened up an approach that shows unique characteristics from the angle of technology, used compound all has stronger fluorescence among the present invention in liquid and solid film, has quite high heat, light, electricity and physical chemistry equistability simultaneously again.Driving voltage is low, and luminosity and luminous efficiency height can be made into flexible display device; Response speed is fast, and luminous visual angle is wide; Device is ultra-thin, and volume is little, and is in light weight; What is more important, luminous organic material are that material selects to provide broad scope with its intrinsic diversity, by to the design of organic molecular structure, assemble and cut out, can satisfy many-sided different needs and be easy to realize that large tracts of land shows.Also have the preparation method rationally simple, easy to operate.
Description of drawings
Fig. 1 is the structural representation that can send the organic electroluminescence device of blue or green light, purple light and white light provided by the present invention;
Fig. 2 is the structural representation of embodiment 1 provided by the present invention;
Fig. 3 is the structural representation of embodiment 3 provided by the present invention;
Fig. 4 is the test curve figure of the luminescent spectrum of white device described in the embodiment provided by the present invention under the 10V forward voltage.
Wherein, 1, transparent substrates, 2, anode layer, 3, luminescent layer, 4, the double electron transfer layer of doing of hole blocking layer, 5, cathode layer, 6, additional power source, 7, hole transmission layer, 31, the double blue light-emitting layer of doing of hole transmission layer, 32, Yellow luminous layer, 33, blue light-emitting layer, 34, the Yellow light emitting layer.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
Technical scheme of the present invention provides a kind of organic electroluminescence device that can send blue or green light, purple light and white light, as shown in Figure 1, and 1, transparent substrates, 2, anode layer, 3, luminescent layer, 4, the double electron transfer layer of doing of hole blocking layer, 5, cathode layer, 6, additional power source.
As shown in Figure 2, the structure of device comprises transparent substrates 1, anode layer 2, luminescent layer 3, the double electron transfer layer 4 of doing of hole blocking layer, cathode layer 5, additional power source 6, the double blue light-emitting layer 31 of doing of hole transmission layer, Yellow luminous layer 32, device emits white light under the driving of additional power source 6.
As shown in Figure 3, the structure of device comprises transparent substrates 1, anode layer 2, luminescent layer 3, the double electron transfer layer 4 of doing of hole blocking layer, cathode layer 5, additional power source 6, hole transmission layer 7, blue light-emitting layer 33, Yellow luminous layer 34, device emits white light under the driving of additional power source 6.
Double blue light-emitting layer 31 materials of doing of hole transmission layer among the present invention are aromatic diamine compounds or star triphenyl amine compound, or carbazole polymer.Described aromatic diamine compounds can be N, N '-two-(3-aminomethyl phenyl)-N, N '-diphenyl-[1,1 '-xenyl]-4,4 '-diamines (TPD) or N, N '-two (3-naphthyl)-N, N '-diphenyl-[1,1 '-diphenyl]-4,4 '-diamines (NPB), described star triphenyl amine compound can be three-[4-(5-phenyl-2-thienyl) benzene] amine (PTDATA series), and described carbazole polymer can be polyvinylcarbazole (PVK), m-TDATA, DPVBi, BAlq, BCzVB, Perylene or BczVBi etc.。
Yellow luminous layer among the present invention can be the film that fluorescent material itself constitutes as rubrene, or the oxine aluminium (Alq after system after mixing such as the DCM doping
3).
Double electron transfer layer 4 materials of doing of hole blocking layer among the present invention are the hole barrier materials with electron transport ability, as poly N-vinyl carbazole, BCP, two (2-methyl-8-quinoline acid group closes) tri-phenyl-silane alcohol (silanolate) aluminium (III), two (2-methyl-8-quinoline acid group closes) 4-phenol aluminium (III) or two (2-methyl-8-quinoline acid group closes) 4-phenylphenol aluminium (III).
Adopt the blue light OLED device architecture of the present invention's preparation to be exemplified below:
1. the double double electron transfer layer/cathode layer of doing of blue light-emitting layer/Yellow luminous layer/hole blocking layer of doing of glass/ITO/ hole transmission layer
2. the double electron transfer layer/cathode layer of doing of glass/ITO/ hole transmission layer/blue light-emitting layer/Yellow luminous layer/hole blocking layer
3. the double blue light-emitting layer/Yellow luminous layer/hole blocking layer/hole blocking layer/electron transfer layer/cathode layer of doing of glass/ITO/ hole transmission layer
4. the double electron transfer layer/cathode layer of doing of glass/ITO/ hole transmission layer/Yellow luminous layer/blue light-emitting layer/hole blocking layer
5. glass/ITO/ hole transmission layer/Yellow luminous layer/blue light-emitting layer/hole blocking layer/electron transfer layer/cathode layer
6. the double double electron transfer layer/cathode layer of doing of blue light-emitting layer/Yellow luminous layer/hole blocking layer of doing of glass/conducting polymer/hole transmission layer
7. the double electron transfer layer/cathode layer of doing of glass/conducting polymer/hole transmission layer/blue light-emitting layer/Yellow luminous layer/hole blocking layer
8. the double electron transfer layer/cathode layer of doing of glass/conducting polymer/hole transmission layer/Yellow luminous layer/blue light-emitting layer/hole blocking layer
9. the double double electron transfer layer/cathode layer of doing of blue light-emitting layer/Yellow luminous layer/hole blocking layer of doing of flexible polymer substrate glass/ITO/ hole transmission layer
10. the double electron transfer layer/cathode layer of doing of flexible polymer substrate glass/ITO/ hole transmission layer/blue light-emitting layer/Yellow luminous layer/hole blocking layer
Below be specific embodiments of the invention:
As shown in Figure 2, the luminescent layer 3 in the structure of device comprises blue light-emitting layer 31, Yellow luminous layer 32, the double electron transfer layer 4 of doing of hole blocking layer.
The blue-light-emitting layer material of device is NPB, and Yellow luminous layer material is mbrene, the double electron transport material BCP that is of hole blocking layer, cathode layer Mg: Ag alloy.The entire device structrual description is:
Glass substrate/ITO/NPB (30nm)/rubrene (1nm)/BCP (20nm)/Mg: Ag (100nm)
The preparation method is as follows:
1. utilize washing agent, ethanolic solution and deionized water that the transparent conduction base sheet ito glass is carried out ultrasonic cleaning, clean the back and dry up with drying nitrogen.Wherein the ITO film above the glass substrate is as the anode layer of device, the square resistance of ITO film be 10 Ω/
, thickness is 180nm.
2. dried substrate being moved into vacuum chamber, is under the oxygen pressure ring border of 20Pa ito glass to be carried out low energy oxygen plasma preliminary treatment 10 minutes at air pressure, and sputtering power is～20W.
3. the substrate after will handling begins to carry out the evaporation of organic film in the vaporization chamber of condition of high vacuum degree.According to the device architecture as mentioned above double blue-light-emitting layer material NPB that is of hole transmission layer of evaporation successively is 30nm, and Yellow luminous material rubrene is 1nm, the double electron transport material BCP layer 20nm that be of hole blocking layer.The evaporation speed 0.1nm/s of each organic layer, evaporation speed and thickness are by near the film thickness gauge monitoring that is installed in the substrate.
4. finish the preparation of laggard row metal electrode at the organic layer evaporation.Its air pressure is 3 * 10
-3Pa, evaporation speed is～1nm/s, Mg in the alloy, the Ag ratio is～10: 1, thicknesses of layers is 100nm.Evaporation speed and thickness are by near the film thickness gauge monitoring that is installed in the substrate.
5. ready-made device is encapsulated at glove box, glove box is 99.9% nitrogen atmosphere.
6. electric current-the voltage of test component-light characteristic, the luminescent spectrum parameter of test component simultaneously.
The luminescent spectrum that device presses down in the 10V forward drive is referring to accompanying drawing 4.
As shown in Figure 3, the luminescent layer 3 in the structure of device comprises blue light-emitting layer 33, Yellow luminous layer 34, the double electron transfer layer 4 of doing of hole blocking layer.
The hole mobile material of device is NPB, and the blue-light-emitting layer material is NPB, and Yellow luminous layer material is rubrene, the double electron transport material BCP that is of hole blocking layer, cathode layer Mg: Ag alloy.The entire device structrual description is:
Glass substrate/ITO/NPB (20nm)/rubene (1nm)/NPB (5nm)/BCP (20nm)/Mg: Ag (100nm)
The preparation of devices flow process is similar to embodiment 1.
As shown in Figure 3, the luminescent layer 3 in the structure of device comprises blue light-emitting layer 33, Yellow luminous layer 34, the double electron transfer layer 4 of doing of hole blocking layer.
The hole mobile material of device is PVK, and the blue-light-emitting layer material is NPB, and Yellow luminous layer material is rubrene, the double electron transport material BCP that is of hole blocking layer, cathode layer Mg:Ag alloy.The entire device structrual description is:
Glass substrate/ITO/PVK (50nm)/rubene (1nm)/NPB (5nm)/BCP (20nm)/Mg: Ag (100nm)
1. utilize washing agent, ethanolic solution and deionized water that transparent substrates is carried out ultrasonic cleaning, clean the back and dry up with drying nitrogen;
2. transparent substrates is carried out the preparation of electrode in the vacuum evaporation chamber, described electrode comprises anode layer or cathode layer;
The transparent substrates that 3. will prepare electrode moves into vacuum chamber, under oxygen pressure ring border to carrying out the preliminary treatment of low energy oxygen plasma;
4. the transparent substrates after will handling is carried out the spin coating of organic film in spin coater, according to device architecture spin coating organic function layer successively, described organic function layer comprise luminescent layer, carrier blocking layers and (or) implanted layer and resilient coating;
5. finish to carry out in the vaporization chamber of back at condition of high vacuum degree the preparation of another electrode in the organic layer spin coating, described electrode comprises cathode layer or anode layer;
6. ready-made device is encapsulated at glove box, glove box is a nitrogen atmosphere;
7. electric current-the voltage of test component-light characteristic, the luminescent spectrum parameter of test component simultaneously.
As shown in Figure 3, the luminescent layer 3 in the structure of device comprises blue light-emitting layer 33, Yellow luminous layer 34, the double electron transfer layer 4 of doing of hole blocking layer.
The hole mobile material of device is PS: TPD, and the blue-light-emitting layer material is NPB, and Yellow luminous layer material is rubrene, the double electron transport material BCP that is of hole blocking layer, cathode layer Mg: Ag alloy.The entire device structrual description is:
Flexible substrate/ITO/PS: TPD (50nm)/rubene (1nm)/NPB (5nm)/BCP (20nm)/Mg: Ag (100nm)
The preparation of devices flow process is similar to embodiment 3.
As shown in Figure 3, the luminescent layer 3 in the structure of device comprises blue light-emitting layer 33, Yellow luminous layer 34, the double electron transfer layer 4 of doing of hole blocking layer.
The hole mobile material of device is m-TDATA, and the blue-light-emitting layer material is NPB, and Yellow luminous layer material is rubrene, the double electron transport material BCP that is of hole blocking layer, cathode layer Mg:Ag alloy.The entire device structrual description is:
Glass substrate/ITO/m-TDATA (30nm)/rubene (1nm)/NPB (5nm)/BCP (20nm)/Mg: Ag (100nm)
The preparation of devices flow process is similar to embodiment 1.
As shown in Figure 3, the luminescent layer 3 in the structure of device comprises blue light-emitting layer 33, Yellow luminous layer 34, the double electron transfer layer 4 of doing of hole blocking layer
The hole transport layer material of device is TPD, and the blue-light-emitting layer material is NPB, and the double electron transport material of doing of hole blocking layer is BCP, cathode layer Mg: Ag alloy.The entire device structrual description is:
Glass substrate/ITO/TPD (20nm)/rubene (1nm)/NPB (5nm)/BCP (20nm)/Mg: Ag (100nm)
The preparation of devices flow process is similar to embodiment 1.
Claims (1)
1. the organic electroluminescence device that can send white light, blue or green light or purple light comprises transparent substrates, anode layer and cathode layer, and wherein a kind of electrode is positioned at the transparent substrates surface; Between described anode layer and the cathode layer organic function layer is set; Described organic function layer comprises luminescent layer at least, and this luminescent layer comprises fluorescent material layer that sends blue light and the fluorescent material layer that sends gold-tinted; Described organic electroluminescence device is under the driving of additional power source, can send white light, blue or green light or purple light, it is characterized in that: the described fluorescent material layer that sends blue light is made of the organic functional material with cavity transmission ability, and this organic functional material with cavity transmission ability is aromatic diamine compounds or star-like triphenyl amine compound or carbazole polymer; The described material that sends the fluorescent material layer of gold-tinted is rubrene or silole or DCM series;
Concrete device architecture comprises:
(1) glass substrate/ITO/NPB 30nm/rubrene 1nm/BCP 20nm/Mg:Ag 100nm;
(2) glass substrate/ITO/NPB 20nm/rubrene 1nm/NPB 5nm/BCP 20nm/Mg:Ag 100nm;
(3) glass substrate/ITO/PVK 50nm/rubrene 1nm/NPB 5nm/BCP 20nm/Mg:Ag 100nm;
(4) flexible substrate/ITO/PS:TPD 50nm/rubrene 1nm/NPB 5nm/BCP 20nm/Mg:Ag100nm;
(5) glass substrate/ITO/m-TDATA 30nm/rubrene 1nm/NPB 5nm/BCP 20nm/Mg:Ag100nm;
(6) glass substrate/ITO/TPD 20nm/rubrene 1nm/NPB 5nm/BCP 20nm/Mg:Ag 100nm.
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| CN101217187B (en) * | 2008-01-14 | 2011-04-06 | 电子科技大学 | Preparation method if organic electroluminescence device with super-thin layer structure |
| CN101463253B (en) * | 2009-01-12 | 2012-03-07 | 太原理工大学 | White light electroluminescent organic material based on 8-hydroxyquinoline |
| CN102130301B (en) * | 2011-01-04 | 2012-08-29 | 上海大学 | White organic electroluminescence device based on color conversion and manufacturing method thereof |
| CN106058067A (en) * | 2016-08-19 | 2016-10-26 | 深圳市华星光电技术有限公司 | Organic electroluminescence diode and preparation method of cavity transmission layer thereof |
| CN115979907A (en) * | 2021-10-14 | 2023-04-18 | 比亚迪股份有限公司 | Electrode plate pore detection method and electrode plate |
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