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Organic light-emitting diode device

A technology for electroluminescent devices and organic light-emitting layers, which is applied in the fields of electric solid devices, electrical components, semiconductor devices, etc., can solve the problems of affecting the life of OLEDs, insufficient electron mobility, etc., so as to improve the carrier matching degree and simplify the structure. And the effect of improving the preparation process and device stability

Active Publication Date: 2011-05-25
KUNSHAN VISIONOX DISPLAY TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Alq 3 The electron mobility of is still not high enough, and holes enter Alq 3 Easy to form Alq 3 Positive ions seriously affect the life of OLED

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Device structure: ITO / NPB(40nm) / Alq 3 (50nm) / C5:CsCO 3 (20nm, 10%) / Al(150nm)

[0052] With the ITO conductive glass substrate etched with specific patterns as the substrate, the substrate is ultrasonically cleaned in deionized water containing cleaning solution. The temperature of the cleaning solution is about 60°C, and then the cleaned substrate is cleaned Dry it, put it into the evaporation chamber to evaporate the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer, the electron injection layer, and the cathode structure in sequence, and the chamber pressure during the evaporation process is lower than 5.0×10- 3Pa.

[0053] In this example, the first 40nm of N,N'-bis-(1-naphthyl)-N,N'-diphenyl-1,1'-biphenyl-4,4'-diamine (NPB) on the ITO anode acts as a hole Transport layer; continue to vapor-deposit 50nm thick octahydroxyquinoline aluminum (Alq 3 ) as the light-emitting layer; a 20nm electron injection and trans...

Embodiment 2

[0055] Device structure: ITO / NPB(40nm) / Alq 3 (50nm) / C8:CsF(20nm, 10%) / Al(150nm)

[0056] The device with the above structure was prepared according to the method of Example 1, except that CsF doped with 10% by weight of C8 in the compound of the present invention was used as the electron injection and transport functional layer of the device.

Embodiment 3

[0058] Device structure: ITO / NPB(40nm) / Alq 3 (50nm) / C20:KBH(20nm, 10%) / Al(150nm)

[0059] The device with the above structure was prepared according to the method of Example 1, except that KBH doped with 10% (weight) of C20 was used as the electron injection and transport functional layer of the device.

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Abstract

The invention relates to a novel organic light-emitting device and provides an organic light-emitting diode device, which comprises a pair of electrodes and an organic light-emitting medium which is arranged between the pair of electrodes, wherein an electron injection and transmission functional layer is arranged between an organic light-emitting layer and a cathode and comprises at least one compound which is selected from a general formula; Ar is selected from sub-condensed aromatic with 6 to 30 carbon atoms and sub-polynuclear aromatic with 6 to 30 carbon atoms; n is an integer from 1 to 3; meanwhile, the electron injection and transmission functional layer also comprises a dopant which is selected from an alkali metal, an alkali metal oxide, an alkali metal halide, an alkali metal nitride and an alkali metal salt. The stability of the device can be improved; the current carrier matching degree of the organic light-emitting diode device can be improved; and cavities and electrons can be effectively limited in the light-emitting layer to obtain a high-efficiency stable light-emitting device.

Description

technical field [0001] The invention relates to a novel organic electroluminescence device, which belongs to the technical field of organic electroluminescence display. Background technique [0002] Today, with the development of multimedia technology and the advent of the information society, the requirements for the performance of flat panel displays are getting higher and higher. Organic electroluminescent displays have a series of advantages such as self-luminescence, low-voltage DC drive, full curing, wide viewing angle, and rich colors. The response speed is 1000 times that of liquid crystal displays, but its manufacturing cost is lower than that of liquid crystal displays with the same resolution. Therefore, organic electroluminescent displays have broad application prospects. [0003] The research on organic electroluminescent display (also known as organic light-emitting diode, organic light-emitting diode, OLED) began in the 1960s, Pope et al. (Pope M, Kallmann HP...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/52H01L51/54
Inventor 邱勇谢静张国辉段炼
Owner KUNSHAN VISIONOX DISPLAY TECH
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