CN100490209C - Double phosphorescent dye co-doped white light organic electroluminescent device and method for fabricating the same - Google Patents
Double phosphorescent dye co-doped white light organic electroluminescent device and method for fabricating the same Download PDFInfo
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- CN100490209C CN100490209C CNB2007101935567A CN200710193556A CN100490209C CN 100490209 C CN100490209 C CN 100490209C CN B2007101935567 A CNB2007101935567 A CN B2007101935567A CN 200710193556 A CN200710193556 A CN 200710193556A CN 100490209 C CN100490209 C CN 100490209C
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Abstract
The invention pertains to double phosphorescent dyes co-doped white organic light-emitting device and discloses the preparation method. The invention adopts sandwich structure and intermingles the two high-efficient phosphorescent dyes together in the wide band gap body; and also takes use of the energy difference between emission layer and its bilateral function layers to form a structure of energy sink type; restricts exaction within the structure completely, thereby realizing composite luminescence. The structure of the device is indium tin oxide (ITO)/metal oxide/hole-transporting layer/electron blocking layer/emission layer composed of the co-doped blue and orange light phosphorescent dyes/electron transporting(hole blocking)layer/metal cathode. The prepared devices are driven by direct voltage and obtain high-efficient white light emission. The maximum electroluminescence current efficiency is 52.8cd/A; the maximum electroluminescence (EL) power efficiency is 42.5lm/W; the maximum luminance is19500 cd/m<SUP>2</SUP>. The devices show simultaneous emission of complementary colors of orange and blue and stable spectrum when at work. The device has simple manufacturing process, low cost and excellent stability.
Description
Technical field
The present invention relates to white light organic electroluminescent device of a kind of double phosphorescent coloring codope and preparation method thereof.
Background technology
ORGANIC ELECTROLUMINESCENCE DISPLAYS is regarded as emerging Display Technique the most popular in the Flat Panel Display Industry, has obtained extensive studies at present.Compare with inorganic electroluminescence device, organic electroluminescence device have the material range of choice wide, can realize by blue light region to the full color of red light district show, driving voltage is low, luminosity and luminous efficiency height, the visual angle is wide, response speed is fast, manufacture craft is simple, cost is low, and easily realize plurality of advantages such as large tracts of land and flexible demonstrations, thereby obtained developing rapidly in the past nearly 20 years.At present, the research in organic light emitting display field is not limited to academia already, nearly all internationally recognizable electronics major company and chemical company all drops into huge manpower and fund enters this research field, present the situation that research, exploitation and industrialization advance side by side, the industrialization of rapidly marching toward of ORGANIC ELECTROLUMINESCENCE DISPLAYS technology.
Organic Light Emitting Diode by people such as Deng of Kodak high official position invention in 1987 be a kind of double-deck sandwich structure (Deng Qingyun, ten thousand this come section, the Applied Physics wall bulletin, 51 phases, 913 pages, C.W.Tang in 1987, S.A.VanSlyke, Appl.Phys.Lett.51, pp913, (1987), United States Patent (USP), the patent No.: 4,769,292 and 4,885,211, U.S.Pat.Nos.4,769,292 and 4,885,211), it is made up of hole transmission layer and electric transmission/luminescent layer, and is clipped between indium tin oxide ITO and the metal electrode.Multilayer device comprises that hole injection layer, hole transmission layer, luminescent layer, electron transfer layer, electron injecting layer and dye adulterated type device also were designed to create afterwards, by organic layer thickness optimization and preparation technology's improvement, the electroluminescent properties of device has obtained improving greatly.
White light organic electroluminescent device can be divided into fluorescent device and phosphorescence device two classes according to luminous character.Fluorescent device is a class device of studying morely at present, and its technical study is also the most ripe, and part realizes industrialization.(family, city grinds two, island Kimura, the long chi of well forever since nineteen ninety-five is ground second-class people's reported first fluorescence white light organic electroluminescent device by family, Japanese city, science, 267 phases of nineteen ninety-five, Junji Kido, Masato Kimura, Katsutoshi Nagai, Science 1995,267, and 1332) since, the research of this respect has obtained significant progress, and the different components structure puts forward with the different luminescent material persons of being studied.People's reported first such as An Delie in 2002 with white light organic electroluminescent device (An Delie, Forrester, Tang Pusen, the advanced material of phosphor material preparation, 2002 14 147 phases of volume, B.W.D ' Andrade, S.R.Forrest, M.E.Thompson, Adv.Mater.2002,14,147).Subsequently, adopt the device of fluorescence and phosphor material also to be made simultaneously.But from present research, the large-scale commercial applications of white light organic assembly distance also has bigger distance, and the problem of existence is more outstanding.Therefore by rational design device architecture, effectively regulate and control the position of exciton recombination zone, thereby the high efficiency of obtaining, high brightness, stable white-light electroluminescence device are the further emphasis of research.
Summary of the invention
One of purpose of the present invention provides the white light organic electroluminescent device of double phosphorescent coloring codope as luminescent layer;
Another object of the present invention provides the preparation method of this double phosphorescent coloring codope as the white light organic electroluminescent device of luminescent layer.
Shown in attached Fig. 1 and 2, the double phosphorescent coloring codope that provides of invention is as the white light organic electroluminescent device of luminescent layer, it by: substrate 1, anode layer 2, metal oxide layer 3, hole transmission layer 4, electronic barrier layer 5, luminescent layer 6, electric transmission/hole blocking layer 7 and cathode layer 8 constitute; Wherein, evaporation layer of metal oxide skin(coating) 3 on anode layer 2, evaporation hole transmission layer 4, electronic barrier layer 5, luminescent layer 6, electric transmission/hole blocking layer 7 and cathode layer 8 successively afterwards;
What luminescent layer 6 adopted is that blue light and orange light organophosphor photoinitiator dye are entrained in the organic mixed material of forming in the material of main part jointly; The blue light dyestuff is two (2,4-diphenyl pyridine) iridium (dicarboxyl pyridine) (being called for short FIrpic), and orange photoinitiator dye is that 2-(9 ', 9 '-diethyl fluorenes-2 '-)-1-phenyl benzimidazole iridium (acetylacetone,2,4-pentanedione) (is called for short (fbi)
2Ir (acac)), material of main part is 4,4 ', 4 " in-three (N-carbazole) triphenylamine (be called for short TCTA) and 1, the 3 two carbazyl benzene (abbreviation mCP) any one;
The organic blue light dyestuff and the material of main part weight ratio of mixing are controlled between 4%-8.5%;
The organic orange photoinitiator dye and the material of main part weight ratio of mixing are controlled between 0.5%-1%;
What electric transmission/hole blocking layer 7 adopted is 3-phenyl-4-(1 '-naphthyl)-5-phenyl-1,2, and 4-triazole (being called for short TAZ) and two (2-methyl-oxines)-(4-phenylphenol) aluminium (are called for short BALq
3) in any;
The combination electrode that cathode layer 8 adopts metallic aluminium (Al) and boundary layer lithium fluoride (LiF) to form.
When applying voltage between two electrodes, white light organic electroluminescent device will send white light.When voltage when between 12 volts, changing for 7 volts, the chromaticity coordinates of device only moves to (0.31,0.38) from (0.34,0.39), demonstrates extraordinary spectrum stability.
The double phosphorescent coloring codope is as follows as the preparation method of the white light organic electroluminescent device of luminescent layer:
Earlier the ITO layer 2 on the ito glass is photo-etched into the electrode of fine strip shape, cleans then, nitrogen dries up, and it is transferred in the vacuum coating system after 2 to 5 minutes with oxygen plasma treatment, treats that vacuum degree reaches 1 to 5 * 10
-4During handkerchief, evaporation metal oxide skin(coating) 3 on ITO layer 2 successively, hole transmission layer 4, electronic barrier layer 5, luminescent layer 6, electric transmission/hole blocking layer 7 and cathode layer 8, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metal electrode layer 8 is 1 nanometer, the thickness of metallic aluminium is the 100-300 nanometer, and the thickness of metal oxide layer 3 is the 0-20 nanometer, and the gross thickness of hole transmission layer 4, electronic barrier layer 5, luminescent layer 6, electric transmission/hole blocking layer 7 is the 90-185 nanometer;
MoO in metal oxide layer 3, hole transmission layer 4, electronic barrier layer 5, luminescent layer 6 and the electric transmission/hole blocking layer 7
3, WoO
3, V
2O
5, NPB, TCTA, mCP, TAZ and BAlq
3Evaporation rate be controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer per second, and the evaporation rate of LiF is controlled at 0.02 nanometer per second in the cathode layer 8, and the evaporation rate of Al is controlled at 1 nanometer per second.When luminescent layer 6 mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff of doping and the weight ratio of material of main part are controlled between 4.5%-9.5%.
Advantage of the present invention be adopt two kinds of high efficiency phosphorescent coloring codopes in the main body of a broad-band gap as luminescent layer, two kinds of phosphorescent colorings rely on exciton generating mode separately respectively, such as: the mode that the blue light dyestuff utilizes main body-object energy to shift absorbs energy; The orange light then mode of the carrier capture of utilization own is captured exciton energy, guarantees that simultaneously these two kinds of complementary colours launch the white light emission that obtains simultaneously.The inventor is verified theoretically, under the acting in conjunction of these two kinds of mechanism, device can be converted into photo emissions fully with injecting electronics and the hole exciton through being composited of coming in, thereby realizes the internal quantum efficiency near 100%, and this also is extraordinary result in present bibliographical information.
Another advantage of the present invention is structural innovation, and the inventor utilizes the electronics of broad-band gap or the hole or the exciton barrier-layer double team of exciton barrier-layer and broad-band gap to live luminescent layer respectively, forms a kind of structure of quantum well formula.In case hole or electronics enter wherein, will be limited in the luminescent layer effectively, thereby have been guaranteed the effectively compound of electronics and hole.Because there is the difference of energy in boundary layer, exciton is fixed in the luminescent layer, thereby is absorbed fully by two kinds of phosphorescent colorings, obtains white light emission very efficiently.In addition, because the inventor has adopted single-shot photosphere structure, charge carrier recombination region and luminous zone are fixed on a very narrow zone, have guaranteed the spectrum stability of device in very wide voltage range.
Description of drawings
Fig. 1 is the structural representation of double phosphorescent coloring codope as the white light organic electroluminescent device of luminescent layer.Among the figure, 1 glass or flexible substrate, 2 anode layer ITO or the contour work function metal of silver (Ag), 3 metal oxide layers, 4 hole transmission layers, 5 electronic barrier layers, 6 luminescent layers, 7 electric transmission/hole blocking layer, 8 composite cathodes.Fig. 1 also is a Figure of abstract.
Fig. 2 is the generalized section of Fig. 1.
Fig. 3 is voltage-to-current density-luminosity response of the embodiment 1 of organic electroluminescence device of the present invention.Device brightness raises along with the rising of current density and voltage, and a bright voltage of device is 3.7 volts, is 14.9 volts at voltage, and current density is 230 milliamperes of every square centimeter of (mA/cm
2) time device high-high brightness be every square metre of (cd/m of 19500 candelas
2).
Fig. 4 is current efficiency-power efficiency-current density characteristic curve of organic electroluminescence device embodiment 1 of the present invention.The maximum current efficient of device is every ampere of 52.8 candela (cd/A).Maximum power efficiency is every watt of 42.5 lumen (lm/W).
Fig. 5 is the electroluminescent spectrum-voltage response among the organic electroluminescence device embodiment 1 of the present invention.Device shows the red, green, blue three-colour light-emitting.Spectrum is little with change in voltage.Device is under the driving voltage of 10V, and chromaticity coordinates is (0.31,0.38), is good white light emission.
Embodiment
Embodiment 1:
Earlier the ITO on the ito glass is photo-etched into the electrode of 4 mm wides, 30 millimeters long, cleans then, nitrogen dries up, and uses oxygen plasma treatment 2 minutes.In vacuum degree is 1 to 5 * 10
-4In the coating system of handkerchief, evaporation V on the ITO electrode successively
2O
5Vanadic oxide hole injection layer, NPB hole transmission layer, TCTA electronic barrier layer, FIrpic and (fbi)
2Ir (acac) is entrained in the luminescent layer of forming among the mCP jointly, the TAZ electron transfer layer, the composite cathode that LiF and metal A l form, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metallic cathode layer is 1 nanometer, and the thickness of Al is 100 nanometers, metal oxide V
2O
5Thickness be 5 nanometers, the thickness of NPB, TCTA, mCP and TAZ layer is respectively 80,5,20,40 nanometers and this which floor organic substance gross thickness is 145 nanometers; V
2O
5, NPB, TCTA, mCP and TAZ evaporation rate be controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer, the evaporation rate of LiF is controlled at 0.05 nanometer per second in the cathode layer, the evaporation rate of Al is controlled at 1 nanometer per second, when luminescent layer mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff FIrpic of doping, (fbi)
2Ir (acac) is controlled at 6.5%, 1% respectively with the weight ratio of material of main part mCP.Thereby be prepared into structure is ITO/V
2O
5/ NPB/TCTA/mCP:FIrpic:(fbi)
2The organic electroluminescence device of Ir (acac)/TAZ/LiF/Al.Accompanying drawing 3 has provided the voltage-current density-luminosity response of this white light organic electroluminescent device, and a bright voltage of device is 3.7 volts, and the high-high brightness of device is 19500cd/m
2, be 5570cd/m in the brightness of 10 volts of voltages
2Accompanying drawing 4 has provided the current density-power efficiency-current efficiency characteristic curve of device, and the maximum current efficient of device is 52.8cd/A, and maximum power efficiency is 42.5lm/W.Accompanying drawing 5 provides the electroluminescent spectrum-driving voltage characteristic curve of device, and device shows indigo plant, two kinds of complementary colours of orange are simultaneously luminous, and under the driving voltage of 10V, the chromaticity coordinates of device is (0.31,0.38).
Embodiment 2:
Earlier the ITO on the ito glass is photo-etched into the electrode of 4 mm wides, 30 millimeters long, cleans then, nitrogen dries up, and uses oxygen plasma treatment 2 minutes.In vacuum degree is 1 to 5 * 10
-4In the coating system of handkerchief, evaporation V on the ITO electrode successively
2O
5Vanadic oxide hole injection layer, NPB hole transmission layer, TCTA electronic barrier layer, FIrpic and (fbi)
2Ir (acac) is entrained in the luminescent layer of forming among the mCP jointly, the TAZ electron transfer layer, the composite cathode that LiF and metal A l form, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metallic cathode layer is 1 nanometer, and the thickness of Al is 200 nanometers, metal oxide V
2O
5Thickness be 10 nanometers, the thickness of NPB, TCTA, mCP and TAZ layer is respectively 80,7.5,20,40 nanometers and this which floor organic substance gross thickness is 147.5 nanometers; V
2O
5, NPB, TCTA, mCP and TAZ evaporation rate be controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer, the evaporation rate of LiF is controlled at 0.05 nanometer per second in the cathode layer, the evaporation rate of Al is controlled at 1 nanometer per second, when luminescent layer mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff FIrpic of doping, (fbi)
2Ir (acac) is controlled at 8.5%, 1% respectively with the weight ratio of material of main part mCP.Thereby be prepared into structure is ITO/V
2O
5/ NPB/TCTA/mCP:FIrpic:(fbi)
2The organic electroluminescence device of Ir (acac)/TAZ/LiF/Al.A bright voltage of device is 3.5 volts, and high-high brightness is 17900cd/m
2, be 5600cd/m in the brightness of 10 volts of voltages
2The maximum current efficient of device is 41cd/A, and maximum power efficiency is 32lm/W.Device shows indigo plant, two kinds of complementary colours of orange are simultaneously luminous, and under the driving voltage of 10V, the chromaticity coordinates of device is (0.32,0.38).
Embodiment 3:
Earlier the ITO on the ito glass is photo-etched into the electrode of 4 mm wides, 30 millimeters long, cleans then, nitrogen dries up, and uses oxygen plasma treatment 2 minutes.In vacuum degree is 1 to 5 * 10
-4In the coating system of handkerchief, evaporation MoO on the ITO electrode successively
3Molybdenum trioxide hole injection layer, NPB hole transmission layer, TCTA electronic barrier layer, FIrpic and (fbi)
2Ir (acac) is entrained in the luminescent layer of forming among the mCP jointly, the TAZ electron transfer layer, the composite cathode that LiF and metal A l form, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metallic cathode layer is 1 nanometer, and the thickness of Al is 200 nanometers, metal oxide MoO
5Thickness be 10 nanometers, the thickness of NPB, TCTA, mCP and TAZ layer is respectively 60,10,20,40 nanometers and this which floor organic substance gross thickness is 130 nanometers; MoO
3, NPB, TCTA, mCP and TAZ evaporation rate be controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer, the evaporation rate of LiF is controlled at 0.05 nanometer per second in the cathode layer, the evaporation rate of Al is controlled at 1 nanometer per second, when luminescent layer mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff FIrpic of doping, (fbi)
2Ir (acac) is controlled at 5%, 1% respectively with the weight ratio of material of main part mCP.Thereby be prepared into structure is ITO/MoO
3/ NPB/TCTA/mCP:FIrpic:(fbi)
2The organic electroluminescence device of Ir (acac)/TAZ/LiF/Al.A bright voltage of device is 4.1 volts, and high-high brightness is 26400cd/m
2, be 3420cd/m in the brightness of 10 volts of voltages
2The maximum current efficient of device is 47.9cd/A, and maximum power efficiency is 34.8lm/W.Device shows indigo plant, two kinds of complementary colours of orange are simultaneously luminous, and under the driving voltage of 10V, the chromaticity coordinates of device is (0.39,0.42).
Embodiment 4:
Earlier the ITO on the ito glass is photo-etched into the electrode of 4 mm wides, 30 millimeters long, cleans then, nitrogen dries up, and uses oxygen plasma treatment 2 minutes.In vacuum degree is 1 to 5 * 10
-4In the coating system of handkerchief, evaporation WO on the ITO electrode successively
5Tungstic acid hole injection layer, NPB hole transmission layer, mCP electronic barrier layer, FIrpic and (fbi)
2Ir (acac) is entrained in the luminescent layer of forming among the mCP jointly, the TAZ electron transfer layer, the composite cathode that LiF and metal A l form, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metallic cathode layer is 1 nanometer, and the thickness of Al is 300 nanometers, metal oxide WO
3Thickness be 4 nanometers, the thickness of NPB, TCTA, mCP and TAZ layer is respectively 50,7.5,20,40 nanometers and this which floor organic substance gross thickness is 117.5 nanometers; WO
3, NPB, TCTA, mCP and TAZ evaporation rate be controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer, the evaporation rate of LiF is controlled at 0.05 nanometer per second in the cathode layer, the evaporation rate of Al is controlled at 1 nanometer per second, when luminescent layer mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff FIrpic of doping, (fbi)
2Ir (acac) is controlled at 6%, 1% respectively with the weight ratio of material of main part mCP.Thereby be prepared into structure is ITO/WO
3/ NPB/mCP/mCP:FIrpic:(fbi)
2The organic electroluminescence device of Ir (acac)/TAZ/LiF/Al.A bright voltage of device is 4.1 volts, and high-high brightness is 18600cd/m
2, be 690cd/m in the brightness of 10 volts of voltages
2The maximum current efficient of device is 41.7cd/A, and maximum power efficiency is 29.2lm/W.Device shows indigo plant, two kinds of complementary colours of orange are simultaneously luminous, and under the driving voltage of 10V, the chromaticity coordinates of device is (0.39,0.42).
Embodiment 5:
Earlier the ITO on the ito glass is photo-etched into the electrode of 4 mm wides, 30 millimeters long, cleans then, nitrogen dries up, and uses oxygen plasma treatment 2 minutes.In vacuum degree is 1 to 5 * 10
-4In the coating system of handkerchief, evaporation NPB hole transmission layer, mCP electronic barrier layer, FIrpic and (fbi) on the ITO electrode successively
2Ir (acac) is entrained in the luminescent layer of forming among the mCP jointly, the TAZ electron transfer layer, the composite cathode that LiF and metal A 1 are formed, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metallic cathode layer is 1 nanometer, and the thickness of Al is 300 nanometers, and the thickness of NPB, mCP and TAZ layer is respectively 40,5,20,40 nanometers and this which floor organic substance gross thickness is 105 nanometers; The evaporation rate of NPB, mCP and TAZ is controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer, the evaporation rate of LiF is controlled at 0.05 nanometer per second in the cathode layer, the evaporation rate of Al is controlled at 1 nanometer per second, when luminescent layer mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff FIrpic of doping, (fbi)
2Ir (acac) is controlled at 4.5%, 0.5% respectively with the weight ratio of material of main part mCP.Thereby be prepared into structure is ITO/NPB/mCP/mCP:FIrpic:(fbi)
2The organic electroluminescence device of Ir (acac)/TAZ/LiF/Al.A bright voltage of device is 4.3 volts, and high-high brightness is 16400cd/m
2, be 1100cd/m in the brightness of 10 volts of voltages
2The maximum current efficient of device is 35.2cd/A, and maximum power efficiency is 23.6lm/W.Device shows indigo plant, two kinds of complementary colours of orange are simultaneously luminous, and under the driving voltage of 7V, the chromaticity coordinates of device is (0.28,0.38).
Embodiment 6:
Earlier the ITO on the ito glass is photo-etched into the electrode of 4 mm wides, 30 millimeters long, cleans then, nitrogen dries up, and uses oxygen plasma treatment 2 minutes.In vacuum degree is 1 to 5 * 10
-4In the coating system of handkerchief, evaporation NPB hole transmission layer, mCP electronic barrier layer, FIrpic and (fbi) on the ITO electrode successively
2Ir (acac) is entrained in the luminescent layer of forming among the mCP jointly, the TAZ electron transfer layer, the composite cathode that LiF and metal A l form, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metallic cathode layer is 1 nanometer, and the thickness of Al is 300 nanometers, and the thickness of NPB, mCP and TAZ layer is respectively 40,5,20,40 nanometers and this which floor organic substance gross thickness is 105 nanometers; The evaporation rate of NPB, mCP and TAZ is controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer, the evaporation rate of LiF is controlled at 0.05 nanometer per second in the cathode layer, the evaporation rate of Al is controlled at 1 nanometer per second, when luminescent layer mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff FIrpic of doping, (fbi)
2Ir (acac) is controlled at 4.5%, 1% respectively with the weight ratio of material of main part mCP.Thereby be prepared into structure is ITO/NPB/mCP/mCP:FIrpic:(fbi)
2The organic electroluminescence device of Ir (acac)/TAZ/LiF/Al.A bright voltage of device is 4.1 volts, and high-high brightness is 20400cd/m
2, be 1400cd/m in the brightness of 10 volts of voltages
2The maximum current efficient of device is 50cd/A, and maximum power efficiency is 38.3lm/W.Device shows indigo plant, two kinds of complementary colours of orange are simultaneously luminous, and under the driving voltage of 7V, the chromaticity coordinates of device is (0.39,0.44).
Embodiment 7:
Earlier the ITO on the ito glass is photo-etched into the electrode of 4 mm wides, 30 millimeters long, cleans then, nitrogen dries up, and uses oxygen plasma treatment 2 minutes.In vacuum degree is 1 to 5 * 10
-4In the coating system of handkerchief, evaporation MoO on the ITO electrode successively
3Molybdenum trioxide hole injection layer, NPB hole transmission layer, TCTA electronic barrier layer, FIrpic and (fbi)
2Ir (acac) is entrained in the luminescent layer of forming among the mCP jointly, the TAZ electron transfer layer, the composite cathode that LiF and metal A l form, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metallic cathode layer is 1 nanometer, and the thickness of Al is 200 nanometers, metal oxide MoO
5Thickness be 9 nanometers, the thickness of NPB, TCTA, mCP and TAZ layer is respectively 100,5,20,40 nanometers and this which floor organic substance gross thickness is 165 nanometers; MoO
3, NPB, TCTA, mCP and TAZ evaporation rate be controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer, the evaporation rate of LiF is controlled at 0.05 nanometer per second in the cathode layer, the evaporation rate of Al is controlled at 1 nanometer per second, when luminescent layer mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff FIrpic of doping, (fbi)
2Ir (acac) is controlled at 6%, 1% respectively with the weight ratio of material of main part mCP.Thereby be prepared into structure is ITO/MoO
3/ NPB/TCTA/mCP:FIrpic:(fbi)
2The organic electroluminescence device of Ir (acac)/TAZ/LiF/Al.A bright voltage of device is 3.9 volts, and high-high brightness is 23100cd/m
2, be 3700cd/m in the brightness of 10 volts of voltages
2The maximum current efficient of device is 53.1cd/A, and maximum power efficiency is 40.75lm/W.Device shows indigo plant, two kinds of complementary colours of orange are simultaneously luminous, and under the driving voltage of 10V, the chromaticity coordinates of device is (0.30,0.43).
Embodiment 8:
Earlier the ITO on the ito glass is photo-etched into the electrode of 4 mm wides, 30 millimeters long, cleans then, nitrogen dries up, and uses oxygen plasma treatment 2 minutes.In vacuum degree is 1 to 5 * 10
-4In the coating system of handkerchief, evaporation MoO on the ITO electrode successively
2Molybdenum trioxide hole injection layer, NPB hole transmission layer, TCTA electronic barrier layer, FIrpic and (fbi)
3Ir (acac) is entrained in the luminescent layer of forming among the mCP jointly, the TAZ electron transfer layer, the composite cathode that LiF and metal A l form, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metallic cathode layer is 1 nanometer, and the thickness of Al is 200 nanometers, metal oxide MoO
3Thickness be 10 nanometers, the thickness of NPB, TCTA, mCP and TAZ layer is respectively 100,5,20,40 nanometers and this which floor organic substance gross thickness is 165 nanometers; MoO
3, NPB, TCTA, mCP and TAZ evaporation rate be controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer, the evaporation rate of LiF is controlled at 0.05 nanometer per second in the cathode layer, the evaporation rate of Al is controlled at 1 nanometer per second, when luminescent layer mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff FIrpic of doping, (fbi)
2Ir (acac) is controlled at 6%, 0.75% respectively with the weight ratio of material of main part mCP.Thereby be prepared into structure is ITO/MoO
3/ NPB/TCTA/mCP:FIrpic:(fbi)
2The organic electroluminescence device of Ir (acac)/TAZ/LiF/Al.A bright voltage of device is 3.9 volts, and high-high brightness is 20200cd/m
2, be 2240cd/m in the brightness of 10 volts of voltages
2The maximum current efficient of device is 50.7cd/A, and maximum power efficiency is 38.6lm/W.Device shows indigo plant, two kinds of complementary colours of orange are simultaneously luminous, and under the driving voltage of 10V, the chromaticity coordinates of device is (0.31,0.41).
Embodiment 9:
Earlier the ITO on the ito glass is photo-etched into the electrode of 4 mm wides, 30 millimeters long, cleans then, nitrogen dries up, and uses oxygen plasma treatment 2 minutes.In vacuum degree is 1 to 5 * 10
-4In the coating system of handkerchief, evaporation MoO on the ITO electrode successively
3Molybdenum trioxide hole injection layer, NPB hole transmission layer, TCTA electronic barrier layer, FIrpic and (fbi)
2Ir (acac) is entrained in the luminescent layer of forming among the mCP jointly, the TAZ electron transfer layer, the composite cathode that LiF and metal A l form, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metallic cathode layer is 1 nanometer, and the thickness of Al is 200 nanometers, metal oxide MoO
3Thickness be 20 nanometers, the thickness of NPB, TCTA, mCP and TAZ layer is respectively 120,5,20,40 nanometers and this which floor organic substance gross thickness is 185 nanometers; MoO
3, NPB, TCTA, mCP and TAZ evaporation rate be controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer, the evaporation rate of LiF is controlled at 0.05 nanometer per second in the cathode layer, the evaporation rate of Al is controlled at 1 nanometer per second, when luminescent layer mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff FIrpic of doping, (fbi)
2Ir (acac) is controlled at 6%, 0.75% respectively with the weight ratio of material of main part mCP.Thereby be prepared into structure is ITO/MoO
3/ NPB/TCTA/mCP:FIrpic:(fbi)
2The organic electroluminescence device of Ir (acac)/TAZ/LiF/Al.A bright voltage of device is 3.9 volts, and high-high brightness is 15500cd/m
2, be 1520cd/m in the brightness of 10 volts of voltages
2The maximum current efficient of device is 40cd/A, and maximum power efficiency is 28.6lm/W.Device shows indigo plant, two kinds of complementary colours of orange are simultaneously luminous, and under the driving voltage of 10V, the chromaticity coordinates of device is (0.30,0.35).
Embodiment 10:
Earlier the ITO on the ito glass is photo-etched into the electrode of 4 mm wides, 30 millimeters long, cleans then, nitrogen dries up, and uses oxygen plasma treatment 2 minutes.In vacuum degree is 1 to 5 * 10
-4In the coating system of handkerchief, evaporation NPB hole transmission layer, FIrpic and (fbi) on the ITO electrode successively
2Ir (acac) is entrained in the luminescent layer of forming among the TCTA jointly, the TAZ electron transfer layer, the composite cathode that LiF and metal A l form, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metallic cathode layer is 1 nanometer, and the thickness of Al is 300 nanometers, and the thickness of NPB, TCTA and TAZ layer is respectively 40,20,40 nanometers and this which floor organic substance gross thickness is 100 nanometers; The evaporation rate of NPB, TCTA and TAZ is controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer, the evaporation rate of LiF is controlled at 0.05 nanometer per second in the cathode layer, the evaporation rate of Al is controlled at 1 nanometer per second, when luminescent layer mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff FIrpic of doping, (fbi)
2Ir (acac) is controlled at 4%, 1% respectively with the weight ratio of material of main part TCTA.Thereby be prepared into structure is ITO/NPB/TCTA:FIrpic:(fbi)
2The organic electroluminescence device of Ir (acac)/TAZ/LiF/Al.A bright voltage of device is 3.1 volts, and high-high brightness is 17390cd/m
2, be 12200cd/m in the brightness of 10 volts of voltages
2The maximum current efficient of device is 40.4cd/A, and maximum power efficiency is 37.3lm/W.Device shows indigo plant, two kinds of complementary colours of orange are simultaneously luminous, and under the driving voltage of 10V, the chromaticity coordinates of device is (0.39,0.42).
Embodiment 11:
Earlier the ITO on the ito glass is photo-etched into the electrode of 4 mm wides, 30 millimeters long, cleans then, nitrogen dries up, and uses oxygen plasma treatment 2 minutes.In vacuum degree is 1 to 5 * 10
-4In the coating system of handkerchief, evaporation NPB hole transmission layer, FIrpic and (fbi) on the ITO electrode successively
2Ir (acac) is entrained in the luminescent layer of forming among the TCTA jointly, the TAZ electron transfer layer, the composite cathode that LiF and metal A l form, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metallic cathode layer is 1 nanometer, and the thickness of Al is 300 nanometers, and the thickness of NPB, TCTA and TAZ layer is respectively 40,20,40 nanometers and this which floor organic substance gross thickness is 100 nanometers; The evaporation rate of NPB, TCTA and TAZ is controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer, the evaporation rate of LiF is controlled at 0.05 nanometer per second in the cathode layer, the evaporation rate of Al is controlled at 1 nanometer per second, when luminescent layer mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff FIrpic of doping, (fbi)
2Ir (acac) is controlled at 8.5%, 1% respectively with the weight ratio of material of main part TCTA.Thereby be prepared into structure is ITO/NPB/TCTA:FIrpic:(fbi)
2The organic electroluminescence device of Ir (acac)/TAZ/LiF/Al.The maximum current efficient of device is 38.8cd/A, and maximum power efficiency is 34.8lm/W.Device shows indigo plant, two kinds of complementary colours of orange are simultaneously luminous, and under the driving voltage of 10V, the chromaticity coordinates of device is (0.39,0.42).
Embodiment 12:
Earlier the ITO on the ito glass is photo-etched into the electrode of 4 mm wides, 30 millimeters long, cleans then, nitrogen dries up, and uses oxygen plasma treatment 2 minutes.In vacuum degree is 1 to 5 * 10
-4In the coating system of handkerchief, evaporation V on the ITO electrode successively
2O
5Vanadic oxide hole injection layer, NPB hole transmission layer, FIrpic and (fbi)
2Ir (acac) is entrained in the luminescent layer of forming among the TCTA jointly, the TAZ electron transfer layer, the composite cathode that LiF and metal A l form, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metallic cathode layer is 1 nanometer, and the thickness of Al is 300 nanometers, metal oxide V
2O
5Thickness be 7 nanometers, the thickness of NPB, TCTA and TAZ layer is respectively 70,20,40 nanometers and this which floor organic substance gross thickness is 130 nanometers; V
2O
5, NPB, TCTA and TAZ evaporation rate be controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer, the evaporation rate of LiF is controlled at 0.05 nanometer per second in the cathode layer, the evaporation rate of Al is controlled at 1 nanometer per second, when luminescent layer mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff FIrpic of doping, (fbi)
2Ir (acac) is controlled at 8%, 1% respectively with the weight ratio of material of main part TCTA.Thereby be prepared into structure is ITO/V
2O
5/ NPB/TCTA:FIrpic:(fbi)
2The organic electroluminescence device of Ir (acac)/TAZ/LiF/Al.A bright voltage of device is 3.1 volts, and high-high brightness is 18730cd/m
2, be 13200cd/m in the brightness of 10 volts of voltages
2The maximum current efficient of device is 38.1cd/A, and maximum power efficiency is 27.2lm/W.Device shows indigo plant, two kinds of complementary colours of orange are simultaneously luminous, and under the driving voltage of 10V, the chromaticity coordinates of device is (0.41,0.44).
Embodiment 13:
Earlier the ITO on the ito glass is photo-etched into the electrode of 4 mm wides, 30 millimeters long, cleans then, nitrogen dries up, and uses oxygen plasma treatment 2 minutes.In vacuum degree is 1 to 5 * 10
-4In the coating system of handkerchief, evaporation MoO on the ITO electrode successively
3Molybdenum trioxide hole injection layer, NPB hole transmission layer, FIrpic and (fbi)
2Ir (acac) is entrained in the luminescent layer of forming among the TCTA jointly, the TAZ electron transfer layer, the composite cathode that LiF and metal A l form, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metallic cathode layer is 1 nanometer, and the thickness of Al is 300 nanometers, metal oxide MoO
3Thickness be 3 nanometers, the thickness of NPB, TCTA and TAZ layer is respectively 80,20,40 nanometers and this which floor organic substance gross thickness is 140 nanometers; MoO
3, NPB, TCTA and TAZ evaporation rate be controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer, the evaporation rate of LiF is controlled at 0.05 nanometer per second in the cathode layer, the evaporation rate of Al is controlled at 1 nanometer per second, when luminescent layer mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff FIrpic of doping, (fbi)
2Ir (acac) is controlled at 8%, 1% respectively with the weight ratio of material of main part TCTA.Thereby be prepared into structure is ITO/MoO
3/ NPB/TCTA:FIrpic:(fbi)
2The organic electroluminescence device of Ir (acac)/TAZ/LiF/Al.A bright voltage of device is 3.1 volts, and high-high brightness is 18670cd/m
2, be 12450cd/m in the brightness of 10 volts of voltages
2The maximum current efficient of device is 39.8cd/A, and maximum power efficiency is 29.2lm/W.Device shows indigo plant, two kinds of complementary colours of orange are simultaneously luminous, and under the driving voltage of 10V, the chromaticity coordinates of device is (0.42,0.44).
Embodiment 14:
After earlier the wide glass that is 3 centimetres of a block length carefully being cleaned, dry up, be placed in the evaporator, insert the plate washer that processes in advance, when vacuum degree is 1-5 * 10 with nitrogen
-4During handkerchief, the argent Ag electrode of evaporation one deck 4 mm wides, 30 millimeters long on sheet glass, evaporation NPB hole transmission layer, FIrpic and (fbi) on the Ag electrode successively afterwards
2Ir (acac) is entrained in the luminescent layer of forming among the TCTA jointly, the TAZ electron transfer layer, the composite cathode that LiF and metal A l form, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metallic cathode layer is 1 nanometer, and the thickness of Al is 300 nanometers, and the thickness of NPB, TCTA and TAZ layer is respectively 40,20,30 nanometers and this which floor organic substance gross thickness is 90 nanometers; The evaporation rate of NPB, TCTA and TAZ is controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer, the evaporation rate of LiF is controlled at 0.05 nanometer per second in the cathode layer, the evaporation rate of electrode is controlled at 1 nanometer per second, when luminescent layer mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff FIrpic of doping, (fbi)
2Ir (acac) is controlled at 4%, 1% respectively with the weight ratio of material of main part TCTA.Thereby be prepared into structure is Ag/NPB/TCTA:FIrpic:(fbi)
2The organic electroluminescence device of Ir (acac)/TAZ/LiF/Al.A bright voltage of device is 3.1 volts, and high-high brightness is 14890cd/m
2, be 8830cd/m in the brightness of 10 volts of voltages
2The maximum current efficient of device is 34.9cd/A, and maximum power efficiency is 32.3lm/W.Device shows indigo plant, two kinds of complementary colours of orange are simultaneously luminous, and under the driving voltage of 10V, the chromaticity coordinates of device is (0.39,0.42).
Embodiment 15:
After earlier the wide glass that is 3 centimetres of a block length carefully being cleaned, dry up, be placed in the evaporator, insert the plate washer that processes in advance, when vacuum degree is 1-5 * 10 with nitrogen
-4During handkerchief, the metal nickel electrode of evaporation one deck 4 mm wides, 30 millimeters long on sheet glass, evaporation NPB hole transmission layer, FIrpic and (fbi) on the Ni electrode successively afterwards
2Ir (acac) is entrained in the luminescent layer of forming among the TCTA jointly, the TAZ electron transfer layer, the composite cathode that LiF and metal A l form, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metallic cathode layer is 1 nanometer, and the thickness of Al is 300 nanometers, and the thickness of NPB, TCTA and TAZ layer is respectively 40,20,40 nanometers and this which floor organic substance gross thickness is 100 nanometers; The evaporation rate of NPB, TCTA and TAZ is controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer, the evaporation rate of LiF is controlled at 0.05 nanometer per second in the cathode layer, the evaporation rate of electrode is controlled at 1 nanometer per second, when luminescent layer mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff FIrpic of doping, (fbi)
2Ir (acac) is controlled at 4%, 1% respectively with the weight ratio of material of main part TCTA.Thereby be prepared into structure is Ni/NPB/TCTA:FIrpic:(fbi)
2The organic electroluminescence device of Ir (acac)/TAZ/LiF/Al.A bright voltage of device is 3.1 volts, and high-high brightness is 16090cd/m
2, be 4930cd/m in the brightness of 10 volts of voltages
2The maximum current efficient of device is 42.3cd/A, and maximum power efficiency is 40lm/W.Device shows indigo plant, two kinds of complementary colours of orange are simultaneously luminous, and under the driving voltage of 10V, the chromaticity coordinates of device is (0.35,0.40).
Embodiment 16:
After earlier the wide glass that is 3 centimetres of a block length carefully being cleaned, dry up, be placed in the evaporator, insert the plate washer that processes in advance, when vacuum degree is 1-5 * 10 with nitrogen
-4During handkerchief, the metallic gold Au electrode of evaporation one deck 4 mm wides, 30 millimeters long on sheet glass, evaporation NPB hole transmission layer, FIrpic and (fbi) on the Au electrode successively afterwards
2Ir (acac) is entrained in the luminescent layer of forming among the TCTA jointly, the TAZ electron transfer layer, the composite cathode that LiF and metal A l form, wherein the mutual cross section of two electrodes forms the luminous zone of devices, the luminous zone area is 16 square millimeters, the thickness of LiF in the metallic cathode layer is 1 nanometer, and the thickness of Al is 300 nanometers, and the thickness of NPB, TCTA and TAZ layer is respectively 40,12,40 nanometers and this which floor organic substance gross thickness is 92 nanometers; The evaporation rate of NPB, TCTA and TAZ is controlled at 0.2 nanometer per second, dyestuff FIrpic and (fbi)
2The evaporation rate of Ir (acac) is controlled at 0.002 nanometer, the evaporation rate of LiF is controlled at 0.05 nanometer per second in the cathode layer, the evaporation rate of electrode is controlled at 1 nanometer per second, when luminescent layer mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic dyestuff FIrpic of doping, (fbi)
2Ir (acac) is controlled at 4%, 1% respectively with the weight ratio of material of main part TCTA.Thereby be prepared into structure is Au/NPB/TCTA:FIrpic:(fbi)
2The organic electroluminescence device of Ir (acac)/TAZ/LiF/Al.A bright voltage of device is 3.3 volts, and high-high brightness is 11820cd/m
2, be 7200cd/m in the brightness of 10 volts of voltages
2The maximum current efficient of device is 36.5cd/A, and maximum power efficiency is 34.5lm/W.Device shows indigo plant, two kinds of complementary colours of orange are simultaneously luminous, and under the driving voltage of 10V, the chromaticity coordinates of device is (0.34,0.39).
Claims (3)
1. double phosphorescent coloring codope white light organic electroluminescent device, it is characterized in that it is made of: substrate (1), anode layer (2), metal oxide layer (3), hole transmission layer (4), electronic barrier layer (5), luminescent layer (6), electric transmission/hole blocking layer (7) and cathode layer (8); Wherein, go up evaporation layer of metal oxide skin(coating) (3), afterwards evaporation hole transmission layer (4), electronic barrier layer (5), luminescent layer (6), electric transmission/hole blocking layer (7) and cathode layer (8) successively at anode layer (2);
Described substrate layer (1) is glass or Merlon flexible substrate;
Described anode layer (2) adopts indium tin oxide, argent, nickel, copper or gold;
Metal oxide layer (3) adopts any in vanadic oxide, molybdenum trioxide and the tungstic acid;
Hole transmission layer (4) adopts: N, N '-two (1-naphthyl)-N, N '-diphenyl-1,1 '-diphenyl-4,4 '-diamines;
Electronic barrier layer (5) adopts 4,4 ', 4 " in-three (N-carbazole) triphenylamines and 1, the 3 two carbazyl benzene any one;
What luminescent layer (6) adopted is that blue light and orange light organophosphor photoinitiator dye are entrained in the organic mixed material of forming in the material of main part jointly; The blue light dyestuff is two (2,4-diphenyl pyridine) iridium (dicarboxyl pyridine), and orange photoinitiator dye is 2-(9 ', 9 '-diethyl fluorenes-2 '-)-1-phenyl benzimidazole iridium (acetylacetone,2,4-pentanedione), material of main part is 4,4 '; 4 " in-three (N-carbazole) triphenylamines and 1, the 3 two carbazyl benzene any one;
The organic blue light dyestuff and the material of main part weight ratio of mixing are controlled between 4%-8.5%;
The organic orange photoinitiator dye and the material of main part weight ratio of mixing are controlled between 0.5%-1%;
What electric transmission/hole blocking layer (7) adopted is 3-phenyl-4-(1 '-naphthyl)-5-phenyl-1,2, any in 4-triazole and two (2-methyl-oxine)-(4-phenylphenol) aluminium;
The combination electrode that cathode layer (8) adopts metallic aluminium and boundary layer lithium fluoride to form.
2, double phosphorescent coloring codope white light organic electroluminescent device as claimed in claim 1, it is characterized in that, the luminous zone area that the mutual cross section of described two electrodes forms device is 16 square millimeters, the thickness of LiF in the cathode layer (8) is 1 nanometer, the thickness of metallic aluminium is the 100-300 nanometer, the thickness of metal oxide layer (3) is the 0-20 nanometer, and the gross thickness of hole transmission layer (4), electronic barrier layer (5), luminescent layer (6), electric transmission/hole blocking layer (7) is the 90-185 nanometer.
3, a kind of preparation method who prepares the described double phosphorescent coloring codope of claim 1 white light organic electroluminescent device is characterized in that step and condition are:
Earlier the ITO layer (2) on the ito glass is photo-etched into the electrode of fine strip shape, cleans then, nitrogen dries up, and it is transferred in the vacuum coating system after 2 to 5 minutes with oxygen plasma treatment, treats that vacuum degree reaches 1 to 5 * 10
-4During handkerchief, go up evaporation metal oxide skin(coating) (3) at ITO layer (2) successively, hole transmission layer (4), electronic barrier layer (5), luminescent layer (6), electric transmission/hole blocking layer (7) and cathode layer (8), wherein the luminous zone area of two the mutual cross section formation of electrode devices is 16 square millimeters, the thickness of LiF in the cathode layer (8) is 1 nanometer, the thickness of metallic aluminium is the 100-300 nanometer, the thickness of metal oxide layer (3) is the 0-20 nanometer, hole transmission layer (4), electronic barrier layer (5), luminescent layer (6), the gross thickness of electric transmission/hole blocking layer (7) is the 90-185 nanometer;
Vanadic oxide, molybdenum trioxide and the tungstic acid of metal oxide layer (3); The N of hole transmission layer (4), N '-two (1-naphthyl)-N, N '-diphenyl-1,1 '-diphenyl-4,4 '-diamines; Electronic barrier layer (5) 4,4 ', 4 "-three (N-carbazole) triphenylamines and 1,3 two carbazyl benzene; Luminescent layer (6) 4,4 ', 4 "-three (N-carbazole) triphenylamines and 1,3 two carbazyl benzene; 3-phenyl-4-(1 '-naphthyl)-5-phenyl-1 of electric transmission/hole blocking layer (7), 2, the evaporation rate of 4-triazole and two (2-methyl-oxine)-(4-phenylphenol) aluminium is controlled at 0.002 nanometer per second, two (2 of luminescent layer (6), 4-diphenyl pyridine) iridium (dicarboxyl pyridine) and 2-(9 ', 9 '-diethyl fluorenes-2 '-)-evaporation rate of 1-phenyl benzimidazole iridium (acetylacetone,2,4-pentanedione) is controlled at 0.002 nanometer per second, the evaporation rate of lithium fluoride is controlled at 0.02 nanometer per second in the cathode layer (8), the evaporation rate of metallic aluminium is controlled at 1 nanometer per second, when luminescent layer (6) mixes, two kinds of organic dyestuff that organic mixed material mixes and material of main part evaporation simultaneously in different evaporation sources, the organic blue light dyestuff and the material of main part weight ratio of doping are controlled between 4%-8.5%; The organic orange photoinitiator dye and the material of main part weight ratio of mixing are controlled between 0.5%-1%.
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| CN102916131A (en) * | 2011-08-05 | 2013-02-06 | 海洋王照明科技股份有限公司 | Organic light-emitting device and preparation method thereof |
| CN102916135A (en) * | 2011-08-05 | 2013-02-06 | 海洋王照明科技股份有限公司 | Inverted organic light-emitting device and preparation method thereof |
| CN102709483A (en) * | 2012-06-26 | 2012-10-03 | 吉林大学 | Single-layer white organic light emitting device |
| CN103219473A (en) * | 2013-04-26 | 2013-07-24 | 上海大学 | White organic light emitting device with single light emitting layer structure |
| CN104610370A (en) * | 2015-01-12 | 2015-05-13 | 苏州大学 | Iridium complex containing 4-phenylpyrimidine structure and application of iridium complex |
| CN104538554B (en) * | 2015-01-13 | 2017-01-25 | 北京科技大学 | Organic light-emitting diode with double-component-mixed electron-transport/hole barrier layer |
| CN105609653A (en) * | 2016-03-09 | 2016-05-25 | 苏州大学 | White-light OLED device and preparation method thereof |
| CN105679957B (en) | 2016-04-20 | 2017-12-05 | 京东方科技集团股份有限公司 | Organic luminescent device and preparation method thereof |
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