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Multilayer thin film sealing technology of organic light emitting display

A light-emitting display and multi-layer thin film technology, which is applied in the fields of electric solid-state devices, semiconductor devices, semiconductor/solid-state device manufacturing, etc., can solve the problems affecting the lifetime of OLEDs, multiple sealants, etc.

Active Publication Date: 2009-11-11
YUNNAN NORTH OLIGHTEK OPTO ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

This packaging method requires a lot of sealant, and the porosity of the sealant on the frame is easy to allow oxygen and moisture to penetrate in, thus affecting the life of the OLED.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The display with the organic light-emitting layer prepared on the single crystal silicon wafer is sealed according to the following steps:

[0017] 1. In a high-vacuum low-temperature environment with a pressure of 5×10-2Pa and a temperature of 130°C, a high-density amorphous alumina film is formed on the surface of an organic light-emitting device by atomic precipitation technology; trimethyltryptophan aluminum is used in the reaction And ozone as the reaction gas, nitrogen as the flushing gas.

[0018] 2. At a pressure of 5×10 -2 Pa, in a high vacuum and low temperature environment with a temperature of 70°C, a layer of amorphous tantalum oxide film is formed on the high-density amorphous aluminum oxide film by atomic precipitation technology; tert-butyliminotri-diethyl is used in the reaction Aminotantalum tantalum and ozone are used as reactive gases, and nitrogen is used as flushing gas.

[0019] 3. After the ALD technology is used for sealing, the display is fur...

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Abstract

The invention relates to the water-oxygen isolation sealing of an organic light emitting display, in particular to a multilayer thin film sealing technology of the organic light emitting display. The technology is characterized in that two layers of metal oxide films and one layer of high molecular organic film are adopted for sealing the organic light emitting display. The metal oxide film can isolate water and oxygen impurities that are greatly harmful to the organic light emitting display and simultaneously prevent the oxidation of metal layer, thereby improving the corrosion resistance, obviously reducing the degeneration rate of the device, and improving the service life of the organic light emitting display.

Description

technical field [0001] The invention relates to the field of organic light-emitting technology, in particular to the water-oxygen isolation and sealing of display devices. Background technique [0002] The most important problem to be solved to realize the commercialization of OLED is the stable light emission of the device. Most organic substances in the OLED light-emitting layer are very sensitive to pollutants, oxygen, and water vapor in the atmosphere. Oxygen and carbonyl compounds formed after oxidation of the light-emitting layer are effective quenchers, which will significantly reduce the quantum efficiency of OLED light emission. It may even cause the display to lose its luminous function. Water vapor hydrolyzes the organic layer and affects conductivity, resulting in greatly reduced stability. Similarly, because most of the metals used for OLED cathode materials are very active materials, they are easily corroded in air or other atmospheres containing oxygen, espe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/56H01L51/52
Inventor 李牧词季华夏
Owner YUNNAN NORTH OLIGHTEK OPTO ELECTRONICS TECH
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