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An organic EL part with ultra-thin layer structure

A layered, electroluminescent technology, applied in electroluminescent light sources, electric light sources, electrical components, etc., can solve the problems of difficult to repeat device performance impact, impact on industrialization, high manufacturing costs, etc., to achieve fast response speed, selection Wide range, reasonable and simple preparation method

Inactive Publication Date: 2008-04-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the complex device structure and manufacturing process have seriously affected its industrialization, and the high manufacturing cost and difficult-to-repeat device performance have seriously affected its competitiveness in the display device market.

Method used

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  • An organic EL part with ultra-thin layer structure
  • An organic EL part with ultra-thin layer structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] As shown in FIG. 2 , the light emitting layer 3 in the structure of the device includes a fluorescent material layer 31 emitting blue light, a phosphorescent material layer 32 emitting yellow light, and the hole blocking layer doubles as the electron transport layer 4 .

[0073] The fluorescent material layer emitting blue light of the device is NPB, and the phosphorescent material layer emitting yellow light is (tbt) 2 Ir(acac), the hole blocking layer is also used as the electron transport material BCP, and the cathode layer uses Mg:Ag alloy. The entire device structure is described as:

[0074] Glass substrate / ITO / NPB(30nm) / (tbt) 2 Ir(acac)(1nm) / BCP(20nm) / Mg:Ag100nm) preparation method is as follows:

[0075] ①Use detergent, ethanol solution and deionized water to ultrasonically clean the transparent conductive substrate ITO glass, and dry it with dry nitrogen after cleaning. Wherein the ITO film on the glass substrate is used as the anode layer of the device, the...

Embodiment 2

[0083] As shown in FIG. 3 , the light emitting layer 3 in the structure of the device includes a fluorescent material layer 31 emitting blue light, a phosphorescent material layer 32 emitting yellow light, and the hole blocking layer doubles as the electron transport layer 4 .

[0084] The hole transport material of the device is NPB, the fluorescent material layer emitting blue light is NPB, and the phosphorescent material layer material emitting yellow light is (tbt) 2 Ir(acac), the hole blocking layer is also used as the electron transport material BCP, and the cathode layer uses Mg:Ag alloy. The entire device structure is described as:

[0085] Glass substrate / ITO / NPB(20nm) / (tbt) 2 Ir(acac)(1nm) / NPB(5nm) / BCP(20nm) / Mg:Ag(100nm)

[0086] The fabrication process of the device is similar to that of Example 1.

Embodiment 3

[0088] As shown in FIG. 3 , the light emitting layer 3 in the structure of the device includes a fluorescent material layer 31 emitting blue light, a phosphorescent material layer 32 emitting yellow light, and the hole blocking layer doubles as the electron transport layer 4 .

[0089] The hole transport material of the device is PVK, the fluorescent material layer emitting blue light is NPB, and the phosphorescent material layer emitting yellow light is (tbt) 2 Ir(acac), the hole blocking layer is also used as the electron transport material BCP, and the cathode layer uses Mg:Ag alloy. The entire device structure is described as:

[0090] Glass substrate / ITO / PVK(50nm) / (tbt) 2 Ir(acac)(1nm) / NPB(5nm) / BCP(20nm) / Mg:Ag(100nm)

[0091] ①Use detergent, ethanol solution and deionized water to ultrasonically clean the transparent substrate, and dry it with dry nitrogen after cleaning;

[0092] ②Transfer the transparent substrate to the vacuum evaporation chamber to prepare the elec...

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PUM

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Abstract

The invention discloses an organic electrofluorescence device with an ultrathin layer structure, which includes a transparent underlay, an anode layer, a cathode layer and an organic function layer equipped between the anode layer and the cathode layer, wherein, an electrode is positioned on the surface of the transparent underlay and the organic function layer includes a luminous layer. The invention is characterized in that: the luminous layer includes a plurality of combination layers and phosphorescence material layers with yellow light, blue light, green light and red light all adopt ultrathin layer structure, with the thickness no more than 5nm. The purpose is to utilize common fluorescent material and phosphorescence material with good performance as the functional material in organic layer and to manufacture high-performance organic luminous device with all colors, by changing the device structure and function layer components.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence in electronic components, in particular to an organic electroluminescence device with an ultra-thin layer structure. Background technique [0002] Organic electroluminescent displays have significant advantages: self-luminescence, low-voltage DC drive, high and low temperature resistance, full curing, wide viewing angle, rich colors, no need for backlight, large viewing angle, low power, and a response speed of up to 1000 times that of liquid crystal displays. times, but its manufacturing cost is lower than that of liquid crystal displays with the same resolution. Therefore, organic electroluminescent displays have become a research hotspot. [0003] Until 1987, C.W.Tang and others from the American Kodak Company invented a sandwich structure device on the basis of summarizing their predecessors: they used 8-hydroxyquinoline, an organic small molecule material with high fluores...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/12H05B33/14H05B33/26H05B33/20H05B33/22
Inventor 于军胜蒋亚东王军李璐
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA