CN101022156A - Blue organic electroluminescent device and producing method thereof - Google Patents
Blue organic electroluminescent device and producing method thereof Download PDFInfo
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- CN101022156A CN101022156A CN 200710048647 CN200710048647A CN101022156A CN 101022156 A CN101022156 A CN 101022156A CN 200710048647 CN200710048647 CN 200710048647 CN 200710048647 A CN200710048647 A CN 200710048647A CN 101022156 A CN101022156 A CN 101022156A
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Abstract
This invention discloses a blue organic electroluminescent device including a transparent substrate, an anode layer and a cathode layer, in which, a kind of electrode is placed on the surface of the substrate, an organic functional layer set between the anode and the cathode layers including at least a light emission layer characterizing that said light emission layer can be a fluorescent material layer emitting blue light driven by an extra supply. This invention utilizes ordinary fluorescent materials of good performance as the functional material in the organic layer to prepare high performance blue organic light emission devices.
Description
Technical field
The present invention relates to technical field of organic electroluminescence in the electronic devices and components, be specifically related to a kind of blue organic electroluminescent device and preparation method thereof.
Background technology
Along with improving constantly of the level of informatization of human society, people are also more and more higher to the performance requirement of the carrier-information display spare of man-machine interface.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 technology of organic electroluminescent just of technical support is provided for little demonstration, because display of organic electroluminescence have from main light emission, low-voltage DC driven,, high-low temperature resistant, complete curings, wide visual angle, color a series of advantage such as enrich, compare with LCD, display of organic electroluminescence does 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 has broad application prospects.
Organic electroluminescent is meant luminous organic material under electric field action, is subjected to electric current and electric field excites and luminous phenomenon, and it is an a kind of luminescence process that electric energy is converted into luminous energy.The device of making according to this principle is called organic electroluminescence device, is called for short OLED.
Organic electroluminescent research starts from the sixties in 20th century.1963, people's reported first such as the Pope of New York Univ USA the electro optical phenomenon of organic material monocrystalline anthracene, but because the thickness of monocrystalline luminescent layer reaches 20 μ m, its driving voltage is up to 400V, therefore fail to cause extensive studies interest, but this working mark the prelude of organic electroluminescent research and has been drawn back.Nineteen eighty-two, Vincett research group prepares the anthracene single crystal film that successful thickness is 0.6 μ m, operating voltage is dropped in the 30V, but the quantum efficiency of device is still very low, so still be not subject to people's attention.
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.
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 of three kinds of independent color of RGB all is vital, this wherein blue luminescent device the most difficult realization of preparation and also be that cost is the highest, and their constructional simplicity, high brightness, high efficiency, long-life all are the key factors that influences device practicability; Especially can realize blue luminously with the structure simple device architecture of trying one's best, the industrialization that can be the white light parts of simple structure is paved the way.
Summary of the invention
Technical problem to be solved by this invention is how a kind of blue organic electroluminescent device and preparation method thereof is provided, 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, the organic luminescent device for preparing high performance blueness, utilize the organic semiconducting materials of related material among the present invention for the function admirable of routine, obtain device efficiently, synthetic and the device technical maturity of material therefor, cost is 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, chemical equistability simultaneously again.
First technical problem proposed by the invention is to solve like this: construct a kind of blue organic electroluminescent device, comprise transparent substrates, anode layer and cathode layer, wherein a kind of electrode is positioned at the transparent substrates surface, also comprise the organic function layer that is arranged between described anode layer and the cathode layer, this organic function layer comprises luminescent layer at least, it is characterized in that, described luminescent layer can be the fluorescent material layer that sends blue light, under the driving of described additional power source, send blue light.
According to blue organic electroluminescent device provided by the present invention, it is characterized in that, the fluorescent material layer of described blue light can be: the organic functional material with cavity transmission ability, aromatic diamine compounds or star triphenyl amine compound, or carbazole polymer, 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 (TPD) or N, N '-two (3-naphthyl)-N, N '-diphenyl-[1,1 '-diphenyl]-4,4 '-diamines (NPB) or three-[4-(5-phenyl-2-thienyl) benzene] amine (PTDATA series), described carbazole polymer can be polyvinylcarbazole (PVK), m-TDATA, DPVBi, BAlq, BCzVB, Perylene, among the BczVBi one or more.
According to blue organic electroluminescent device provided by the present invention, it is characterized in that described organic functional material with cavity transmission ability can be one or more in 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), two (2-methyl-8-quinoline acid group closes) the 4-phenylphenol aluminium (III).
According to blue organic electroluminescent device provided by the present invention, it is characterized in that described transparent substrates can be glass or flexible substrate or sheet metal etc., wherein flexible substrate can be 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 also 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.
According to blue organic electroluminescent device 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 and hole transmission layer, 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 blue organic electroluminescent device provided by the present invention, it is characterized in that described metal complex material can be oxine aluminium (Alq
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), 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).
Second technical problem proposed by the invention is to solve like this: a kind of preparation method of blue organic electroluminescent device is provided, 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 in the vaporization chamber of condition of high vacuum degree, begin to carry out the evaporation of organic film, 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, described luminescent layer is a blue light-emitting layer.
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. current-voltage-the light characteristic of test component, the luminescent spectrum parameter of test component simultaneously.
The preparation method of another kind of blue organic electroluminescent device is provided, 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. current-voltage-the light characteristic of test component, the luminescent spectrum parameter of test component simultaneously.
Blue organic electroluminescent device provided by the present invention, material therefor are organic substance/macromolecule, thereby range of choice is wide, can realize that blue light shows; 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 of organic electroluminescence device provided by the present invention;
Fig. 2 is the structural representation of embodiment 1-5 provided by the present invention;
Wherein, 1, transparent substrates, 2, anode layer, 3, organic function layer, 4, cathode layer, 5, additional power source, 31, the double blue light-emitting layer of doing of hole transmission layer, 32, the double electron transfer layer of doing of hole blocking layer.
Fig. 3 is the structural representation of embodiment 6-8 provided by the present invention;
Wherein, 1, transparent substrates, 2, anode layer, 3, organic function layer, 4, cathode layer, 5, additional power source, 33, hole transmission layer, 34, blue light-emitting layer, 35, the double electron transfer layer of doing of hole blocking layer.
Fig. 4 is the brightness-voltage characteristic test curve figure of blue device described in the embodiment 1 provided by the present invention.
Fig. 5 is the test curve figure of the luminescent spectrum of blue device under the 10V forward voltage described in the embodiment 1 provided by the present invention
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
Technical scheme of the present invention provides a kind of blue-ray organic electroluminescent device, as shown in Figure 2, the structure of device comprises transparent substrates 1, anode layer 2, organic function layer 3, cathode layer 4, wherein anode layer 2 is positioned at transparent substrates 1 surface, and organic function layer 3 is between anode layer 2 and cathode layer 4, and organic function layer 3 can comprise the double blue light-emitting layer 31 of doing of hole transmission layer, the double electron transfer layer 32 of doing of hole blocking layer, device is blue light-emitting under the driving of additional power source 5.
As shown in Figure 3, Figure 4, the structure of device comprises transparent substrates 1, anode layer 2, organic function layer 3, cathode layer 4, wherein anode layer 2 is positioned at transparent substrates 1 surface, organic function layer 3 is between anode layer 2 and cathode layer 4, and organic function layer 3 can comprise hole transmission layer 33, blue light-emitting layer 34, the double electron transfer layer 35 of doing of hole blocking layer, device is blue light-emitting under the driving of additional power source 5.
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.。
Double electron transfer layer 32 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 monomethyls-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/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/hole blocking layer
3. the double double electron transfer layer/cathode layer of doing of blue light-emitting layer/hole blocking layer of doing of glass/conducting polymer/hole transmission layer
4. the double electron transfer layer/cathode layer of doing of glass/conducting polymer/hole transmission layer/blue light-emitting layer/hole blocking layer
5. the double double electron transfer layer/cathode layer of doing of blue light-emitting layer/hole blocking layer of doing of flexible polymer substrate glass/ITO/ hole transmission layer
6. the double electron transfer layer/cathode layer of doing of flexible polymer substrate glass/ITO/ hole transmission layer/blue light-emitting layer/hole blocking layer
Below be specific embodiments of the invention:
As shown in Figure 2, the organic function layer 3 in the structure of device comprises the double blue light-emitting layer 31 of doing of hole transmission layer, the double electron transfer layer 32 of doing of hole blocking layer.
The double blue-light-emitting layer material of doing of the hole transmission layer of device is NPB, and the double electric transmission layer material of doing of hole blocking layer is BCP, cathode layer Mg:Ag alloy.The entire device structrual description is:
Glass substrate/ITO/NPB (50nm)/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, and the square resistance of ITO film is 10O/, and 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 50nm, 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 sent to glove box and encapsulates, glove box is 99.9% nitrogen atmosphere.
6. current-voltage-the light characteristic of test component, the luminescent spectrum parameter of test component simultaneously.
The brightness of described blue device-voltage characteristic test curve figure is referring to accompanying drawing 4.
The luminescent spectrum that device presses down in the 10V forward drive is referring to accompanying drawing 5.
As shown in Figure 2, the organic function layer 3 in the structure of device comprises the double blue light-emitting layer 31 of doing of hole transmission layer, the double electron transfer layer 32 of doing of hole blocking layer.
The double blue-light-emitting layer material of doing of the hole transmission layer of device is TPD, and the double electric transmission layer material of doing of hole blocking layer is BCP, cathode layer Mg:Ag alloy.The entire device structrual description is:
Glass substrate/ITO/TPD (50nm)/BCP (20nm)/Mg:Ag (100nm)
The preparation of devices flow process is similar to embodiment 1.
As shown in Figure 2, the organic function layer 3 in the structure of device comprises the double blue light-emitting layer 31 of doing of hole transmission layer, the double electron transfer layer 32 of doing of hole blocking layer.
The double blue-light-emitting layer material of doing of the hole transmission layer of device is PVK, and the double electric transmission layer material of doing of hole blocking layer is BCP, cathode layer Mg:Ag alloy.The entire device structrual description is:
Glass substrate/ITO/PVK (50nm)/BCP (20nm)/Mg:Ag (100nm)
The preparation of devices method is as follows:
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. current-voltage-the light characteristic of test component, the luminescent spectrum parameter of test component simultaneously.
As shown in Figure 2, the organic function layer 3 in the structure of device comprises the double blue light-emitting layer 31 of doing of hole transmission layer, the double electron transfer layer 32 of doing of hole blocking layer.
The double blue-light-emitting layer material of doing of the hole transmission layer of device is PS:TPD, and the double electric transmission layer material of doing of hole blocking layer is BCP, cathode layer Mg:Ag alloy.The entire device structrual description is:
Glass substrate/ITO/PS:TPD (50nm)/BCP (20nm)/Mg:Ag (100nm)
The preparation of devices flow process is similar to embodiment 3.
As shown in Figure 2, the organic function layer 3 in the structure of device comprises the double blue light-emitting layer 31 of doing of hole transmission layer, the double electron transfer layer 32 of doing of hole blocking layer.
The double blue-light-emitting layer material of doing of the hole transmission layer of device is m-TDATA, and the double electric transmission layer material of doing of hole blocking layer is BCP, cathode layer Mg:Ag alloy.The entire device structrual description is:
Glass substrate/ITO/m-TDATA (50nm)/BCP (20nm)/Mg:Ag (100nm)
The preparation of devices flow process is similar to embodiment 1.
As shown in Figure 3, the organic function layer 3 in the structure of device comprises hole transmission layer 33, blue light-emitting layer 34, the double electron transfer layer 35 of doing of hole blocking layer.
The hole transport layer material of device is m-TDATA, 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/m-TDATA (20nm)/NPB (40nm)/BCP (20nm)/Mg:Ag (100nm)
The preparation of devices flow process is similar to embodiment 1.
Embodiment 7
As shown in Figure 3, the organic function layer 3 in the structure of device comprises hole transmission layer 33, blue light-emitting layer 34, the double electron transfer layer 35 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)/NPB (40nm)/BCP (20nm)/Mg:Ag (100nm)
The preparation of devices flow process is similar to embodiment 1.
As shown in Figure 3, the organic function layer 3 in the structure of device comprises hole transmission layer 33, blue light-emitting layer 34, the double electron transfer layer 35 of doing of hole blocking layer.
The hole transport layer material of device is PVK, 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/PVK (20nm)/NPB (40nm)/BCP (20nm)/Mg:Ag (100nm)
The preparation of devices flow process is similar to embodiment 3.
Claims (8)
1, a kind of blue organic electroluminescent device, comprise transparent substrates, anode layer and cathode layer, wherein a kind of electrode is positioned at the transparent substrates surface,, also comprising the organic function layer that is arranged between described anode layer and the cathode layer, this organic function layer comprises luminescent layer at least, it is characterized in that, described luminescent layer can be the fluorescent material layer that sends blue light, under the driving of described additional power source, sends blue light.
2, blue organic electroluminescent device according to claim 1, it is characterized in that, the fluorescent material layer of described blue light can be: the organic functional material with cavity transmission ability, aromatic diamine compounds or star triphenyl amine compound, or carbazole polymer, 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 one or more.
3, blue organic electroluminescent device according to claim 2, it is characterized in that described organic functional material with cavity transmission ability can be one or more in poly N-vinyl carbazole, 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), two (2-methyl-8-quinoline acid group closes) the 4-phenylphenol aluminium (III).
4, blue organic electroluminescent device according to claim 1 is characterized in that, described transparent substrates can be glass or flexible substrate or sheet metal, and wherein flexible substrate can be polyesters or poly-phthalimide compounds; 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 metallic film of gold, copper, silver; Described anode layer also 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; 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, described metal layer material is metallic film or alloy firm, and this metallic film can be the alloy firm of the metallic film of lithium or magnesium or calcium or strontium or aluminium or indium or they and copper or gold or silver etc.
5, blue organic electroluminescent device according to claim 1, 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 and hole transmission layer, 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.
6, blue organic electroluminescent device according to claim 4, it is characterized in that, described metal complex material can be that oxine aluminium or oxine gallium or two [2-(2-hydroxy phenyl-1)-pyridine] beryllium Suo Shu oxadiazole electron-like pass can be 2-(4-diphenyl)-5-(4-2-methyl-2-phenylpropane base)-1,3, the 4-oxadiazole, described imidazoles electron transport material can be 1,3,5-three (N-phenyl-2-benzimidazolyl-2 radicals) benzene; Described aromatic diamine compounds 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, described star triphenyl amine compound can be three-[4-(5-phenyl-2-thienyl) benzene] amine, and described carbazole polymer can be a polyvinylcarbazole.
7, a kind of preparation method of blue organic electroluminescent device 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 in the vaporization chamber of condition of high vacuum degree, begin to carry out the evaporation of organic film, 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, described luminescent layer is a blue light-emitting layer.
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. current-voltage-the light characteristic of test component, the luminescent spectrum parameter of test component simultaneously.
8, the preparation method of blue organic electroluminescent device according to claim 7 is characterized in that, the transparent substrates after handling can be carried out the spin coating of organic film in spin coater, according to device architecture spin coating organic function layer successively; Also can adopt the method that spin-coating method combines in the vapour deposition method and spin coater in the high vacuum chamber.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738414A (en) * | 2012-06-29 | 2012-10-17 | 中国科学院长春应用化学研究所 | Blue-ray fluorescent organic light emitting diode and manufacturing method thereof |
| CN106854252A (en) * | 2017-01-04 | 2017-06-16 | 南京工业大学 | The design synthesis of one class new bipolar polymer host material and its performance study |
| CN110952311A (en) * | 2019-12-16 | 2020-04-03 | 大连理工大学 | Preparation method of large-area flexible electroluminescent nano fiber net |
| WO2020244095A1 (en) * | 2019-06-06 | 2020-12-10 | 武汉华星光电半导体显示技术有限公司 | Oled display panel and preparation method therefor |
| CN114057505A (en) * | 2021-12-13 | 2022-02-18 | 西安邮电大学 | Preparation method of porous flaky alumina framework |
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2007
- 2007-03-16 CN CN 200710048647 patent/CN101022156A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738414A (en) * | 2012-06-29 | 2012-10-17 | 中国科学院长春应用化学研究所 | Blue-ray fluorescent organic light emitting diode and manufacturing method thereof |
| CN106854252A (en) * | 2017-01-04 | 2017-06-16 | 南京工业大学 | The design synthesis of one class new bipolar polymer host material and its performance study |
| WO2020244095A1 (en) * | 2019-06-06 | 2020-12-10 | 武汉华星光电半导体显示技术有限公司 | Oled display panel and preparation method therefor |
| CN110952311A (en) * | 2019-12-16 | 2020-04-03 | 大连理工大学 | Preparation method of large-area flexible electroluminescent nano fiber net |
| CN114057505A (en) * | 2021-12-13 | 2022-02-18 | 西安邮电大学 | Preparation method of porous flaky alumina framework |
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