Organic electro-luminescence device

Inactive Publication Date: 2006-09-28
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0013] It is an object of the present invention to provide an organic

Problems solved by technology

Said wires or TFTs would restrict the light utilizing efficiency because of a limited aperture ratio.
While applying conductive transparent material like ITO for the electron injection layer 150, a major issue is that sputtering process of the ITO material would damage the organic materials (140) beneath.
However, while practical estimated, the el

Method used

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  • Organic electro-luminescence device

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Example

[0023] The invention aims at providing an organic electro-luminescence devices and particularly to a top-emission organic electro-luminescence device, which has high current injection efficiency, relatively loner life time, and can be fabricated with relatively simplified processes.

[0024] Please refer to FIG. 4, which is a cross section view of an organic electro-luminescence device of the present invention. While fabricating the organic electro-luminescence device 200, a substrate 202 is provided first, then a hole injection layer 204 is disposed on the substrate 202. In one embodiment, the substrate 202 is made of light transparent materials or opaque materials with light reflection character. The hole injection layer 204 is made of conductive transparent materials (for instance, ITO, IZO) via sputtering process.

[0025] Next, an organic layer 23 is disposed on the hole injection layer 204. Wherein the organic layer 23 is an multi-layer structure. It at least comprises a light-emi...

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Abstract

An organic electro-luminescence device includes a substrate, a hole injection layer disposed on the substrate, an organic layer disposed on the hole injection layer, a buffer layer disposed on the organic layer, and an electron injection layer forming above the buffer layer. The buffer layer is needed for protecting the organic layer while the electron injection layer is being formed. Within, the organic layer includes a light-emitting layer and an electron transporting layer disposed on the light-emitting layer. The electron transporting layer includes Cesium fluoride.

Description

BACKGROUND OF THE INVENTION [0001] (1) Field of the Invention [0002] The present invention relates generally to organic electro-luminescence devices (OLEDs) and particularly to a top-emission organic electro-luminescence device. [0003] (2) Description of the Prior Art [0004] Organic electro-luminescence devices become popular in display technology these days. Comparing to another popular display—liquid crystal display (LCD), the organic electro-luminescence devices have the advantage of self light-emitting. Hence, backlight module is no more needed in a panel display applied OLEDs. [0005] Please refer to FIG. 1, which is a cross-section view of the structure of an organic electro-luminescence device. The electro-luminescence device 100 comprises, in the sequence from bottom to top, a substrate 102, a hole injection layer 104, a hole transport layer 110, a light-emitting layer 120, an electron transporting layer 140, and an electron injection layer 150. Wherein the hole transport lay...

Claims

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Application Information

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IPC IPC(8): H01L51/54H05B33/12
CPCC09K11/06C09K2211/186H01L51/0059H01L51/0078H01L51/0081H01L51/5052H01L51/5092H01L51/5234H01L2251/5315H05B33/14H10K85/311H10K85/631H10K85/324H10K50/165H10K50/171H10K50/828H10K2102/3026
Inventor LI, SHI-HAOIOU, CHUNG-YEH
Owner AU OPTRONICS CORP
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