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Organic electroluminescent display panel and preparation method thereof

An electroluminescent display and display panel technology, applied in organic light-emitting devices, organic semiconductor devices, circuits, etc., can solve the problems of poor cathode conductivity and high power consumption, and achieve improved conductivity, improved light transmittance, and prevention of ohmic contact Effect

Inactive Publication Date: 2017-10-17
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, under the premise of satisfying the light transmittance, the conductivity of the cathode is still poor, resulting in high power consumption.

Method used

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  • Organic electroluminescent display panel and preparation method thereof
  • Organic electroluminescent display panel and preparation method thereof
  • Organic electroluminescent display panel and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0039] This embodiment provides a method for preparing an organic electroluminescent display panel, such as Figure 1-Figure 6 As shown, it includes: sequentially forming an anode 2, a pixel defining layer 3, an organic light-emitting functional layer 4, and a cathode 5 on a substrate 1. The pixel defining layer 3 is located between adjacent pixel regions and is used to surround each pixel region. The method includes: forming a protective layer 6 on the substrate 1 , forming a metal conductive layer 7 in a region corresponding to the pixel defining layer 3 , and the metal conductive layer 7 is buried in the protective layer 6 and is in contact with the cathode 5 .

[0040] Wherein, the pixel area corresponds to a sub-pixel in the pixel unit.

[0041]By making the metal conductive layer 7 contact with the cathode 5, the resistance of the cathode 5 can be reduced, and at the same time, the cathode 5 with a thin film thickness capable of light transmission can be prevented from b...

Embodiment 2

[0060] Based on the preparation method of the organic electroluminescence display panel provided in Example 1, this embodiment provides an organic electroluminescence display panel prepared by the preparation method, such as Figure 6 and Figure 7 As shown, it includes: a substrate 1, an anode 2, a pixel defining layer 3, an organic light-emitting functional layer 4, and a cathode 5 sequentially arranged on the substrate 1. The pixel defining layer 3 is located between adjacent pixel regions 15 and is used to surround each Each pixel area 15 also includes a metal conductive layer 7 and a protective layer 6 arranged above the cathode 5, the metal conductive layer 7 is correspondingly located in the area where the pixel definition layer 3 is located, the metal conductive layer 7 and the protective layer 6 are arranged in the same layer, and the metal conductive layer 7 is embedded in the protective layer 6 and is in contact with the cathode 5 .

[0061] Wherein, the pixel area...

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Abstract

The invention provides an organic electroluminescent display panel and preparation method thereof. The preparation method includes that an anode, a pixel defining layer, an organic light emitting function layer and a cathode are successively formed on a substrate, wherein the pixel defining layer is located between adjacent pixel regions and is used to surround each pixel region, and the preparation method further includes that a protective layer is formed on the substrate, a metal conductive layer is formed in a region corresponding to the pixel defining layer, and the metal conductive layer is embedded in the protective layer and is in contact with the cathode. The preparation method can reduce the resistance of the cathode, thereby improving the conductivity of the cathode while ensuring good light transmittance of the cathode, and further improving the display uniformity of the organic electroluminescent display panel; the preparation step of the organic electroluminescent display panel is not additionally increased; the pixel aperture of the organic electroluminescent display panel is not influenced, meanwhile, the segment difference of the upper surface of the organic electroluminescent display panel is not additionally increased.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to an organic electroluminescence display panel and a preparation method thereof. Background technique [0002] OLED is an Organic Light-Emitting Diode (Organic Light-Emitting Diode), which has the characteristics of self-illumination, high brightness, wide viewing angle, high contrast, flexibility, and low energy consumption. It began to gradually replace traditional liquid crystal displays and was widely used in mobile phone screens, computer monitors, full-color TVs, etc. Unlike traditional liquid crystal display technology, OLED display technology does not require a backlight and uses very thin coatings of organic materials and glass substrates that emit light when an electric current passes through them. OLED displays have many advantages, including the ability to realize flexible displays. For example, using a bendable plastic substrate as a carrier, combined with a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/32H01L51/52H01L51/56
CPCH10K59/122H10K2102/301H10K59/80522H10K59/1315H10K59/873H10K59/35H10K2102/3026H10K50/844H10K71/00H10K59/131
Inventor 宫奎段献学
Owner BOE TECH GRP CO LTD