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Organic electroluminescent device

An electroluminescent device and electroluminescent technology, which is applied in the fields of electro-solid devices, electrical components, organic chemistry, etc., can solve the problems of increasing the complexity of the device manufacturing process, reducing the cost of OLEDs, disadvantages, etc., and enhancing the ability to provide electrons, Effects of high electron transport capability, high electron injection capability

Inactive Publication Date: 2009-02-11
TSINGHUA UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Devices based on this hybrid electron transport layer have improved efficiency and lifetime, but increase the complexity of the device manufacturing process, which is not conducive to reducing the cost of OLEDs

Method used

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  • Organic electroluminescent device
  • Organic electroluminescent device
  • Organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Device structure: ITO / NPB(40nm) / AND(30nm):7%TBPe / Compound C1(30nm) / LiF / Al

[0042] 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. In this embodiment, the organic layer is first vapor-deposited 40nm thick N, N'-bis-(1-naphthyl)-N, N'-diphenyl-1,1'-biphenyl-4,4'-diamine (NPB) as the empty Hole transport layer; 30nm thick 9,10-Di(naphth-2-yl)anthracene (ADN) and 2,5,8,11-Tetra-tert-butylperylene (TBPe) were evaporated by double source co...

Embodiment 2

[0044] Device structure: ITO / NPB(40nm) / AND(30nm):7%TBPe / PADN(20nm) / compound C5(10nm) / LiF / Al

[0045] 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. In this embodiment, the organic layer is first vapor-deposited 40nm thick N, N'-bis-(1-naphthyl)-N, N'-diphenyl-1,1'-biphenyl-4,4'-diamine (NPB) as the empty Hole transport layer; 30nm thick 9,10-Di(naphth-2-yl)anthracene (ADN) and 2,5,8,11-Tetra-tert-butylperylene (TBPe) were evaporated by doubl...

Embodiment 3

[0047] Device structure: ITO / NPB(40nm) / AND(30nm):7%TBPe / Compound C11(20nm) / Alq3(10nm) / LiF / Al

[0048] 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. In this embodiment, the organic layer is first vapor-deposited 40nm thick N, N'-bis-(1-naphthyl)-N, N'-diphenyl-1,1'-biphenyl-4,4'-diamine (NPB) as the empty Hole transport layer; 30nm thick 9,10-Di(naphth-2-yl)anthracene (ADN) and 2,5,8,11-Tetra-tert-butylperylene (TBPe) were evaporated by doub...

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Abstract

The invention relates to a novel organic luminescent device, in particular to an organic electroluminescent device, which comprises a pair of electrodes and an organic luminescent media arranged between the electrodes, wherein an electron transport functional layer is arranged between the organic luminescent media and the negative electrode; the electron transport functional layer includes at least one of the compounds selected from the following general formulae I or II, wherein Ar is selected from sub-polycyclic aromatic hydrocarbon or sub-heterocyclic aromatic hydrocarbon with the carbon atomicity being 6 to 30; and n is an integer ranging from 2 to 4. The organic luminescent device has higher electron injection capacity and electron transport capacity, increases the capacity for providing electrons for a luminescent layer, and further improves the luminous efficiency of the devices as well as the luminance at the same voltage.

Description

technical field [0001] The invention relates to a novel organic electroluminescence device, in particular to an organic electroluminescence device using a compound containing a pyridine phenyl group, and belongs to the technical field of organic electroluminescence display. Background technique [0002] The organic electroluminescent device is composed of two opposite motors and an organic medium between the electrodes. The organic medium layer includes a hole injection layer, a hole transport layer, a light emitting layer, and an electron transport layer. The electron mobility of most organic materials is lower than the hole mobility. Therefore, in organic light-emitting media, electrons are often in a state of minority carriers. The ability to inject electrons into the light-emitting layer can significantly improve the overall performance of the device. [0003] Organic light-emitting devices have relatively stringent requirements for electron transport materials, which re...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54C07D213/24C07D401/14
Inventor 邱勇刘嵩
Owner TSINGHUA UNIV
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