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Method for improving performance of macromoledule substrate in obstructing water

A polymer and barrier technology, which is applied to the device and coating of the surface coating liquid, can solve the problems of reduced luminous efficiency and device life, reduced luminous quantum efficiency, and reduced device life.

Inactive Publication Date: 2004-10-27
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although plastic has good toughness and transparency, it has a fatal weakness, which is its poor barrier performance to water and oxygen.
OLED devices are particularly sensitive to the intrusion of oxygen and water vapor: oxygen is a triplet quencher, which significantly reduces the quantum efficiency of light emission; oxygen oxidizes the hole transport layer (generally aromatic amine compounds) and the light emitting layer (generates carbonyl compounds) , so that the luminous efficiency and device life are greatly reduced
The influence of water vapor is more obvious, and its hydrolysis on electrode materials, transport materials and luminescent materials will greatly reduce the life of the device

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] After the PET film was cleaned with toluene, acetone, ethanol, and deionized water, and ultrasonically cleaned, it was treated with O in a plasma-enhanced chemical deposition system (PECVID). 2 Take it out after 5 minutes of plasma treatment, then spread the acetone solution of 20fluorododecyl acrylate on the treated side to form a thin layer, press it with a cleaned glass plate, and react for 24 hours. That is, a layer of dense 20-fluorododecyl acrylate polymer film is formed on the PET substrate, and the film thickness is about 300nm. The formation of the film makes the wetting angle of water on the surface of the modified PET film greater than 130 degrees. The water vapor transmission rate is about 50% lower than that of unmodified PET. On the non-plasma-treated side of the modified PET substrate, a layer of ITO conductive film (film thickness about 150nm) was deposited by magnetron sputtering, and then the hole transport layer, the light-emitting layer, and the ele...

Embodiment 2

[0031] The PET surface polymerization modification method is as in Example 1. On the non-plasma-treated side of the modified PET substrate, a layer of diamond-like film (about 120 nm) was first deposited by magnetron sputtering. At this time, the water vapor transmission rate of the modified PET film deposited with the diamond-like film is about 90% lower than that of the unmodified PET film. Then deposit one deck of ITO conductive thin film (thickness about 150nm) on the diamond-like layer, and deposit hole transport layer, luminescent layer, electron transport layer and electrode successively to make electroluminescent device, and under the same condition, use without Compared with the device prepared under the same conditions and the same process, the time required for the luminous efficiency of the device to decrease by half is extended by about 30% when the treated PET is used as the substrate.

Embodiment 3

[0033] The PET surface polymerization modification method and the method of diamond-like carbon are as embodiment 2, deposit a layer of silicon nitride on the diamond-like carbon layer, then vapor-deposit ITO, and according to the method in embodiment 2, make a flexible device;

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Abstract

A process for improving the water imperviousness of high-molecular substrate features that the fluoric acrylic acid or fluoric acrylate is attached on the surface by plasma polymerization, or optical or thermal polymerization to generate a (5-500)-nm high-molecular film. It is suitable for the substrate of microelectronic device.

Description

technical field [0001] The invention relates to a method for preparing a flexible substrate material or packaging with good barrier properties to water and related methods. This material and preparation technology are suitable for the substrate or packaging of flexible electronic devices. Background technique [0002] With the rapid development of information technology, micro-nano electronic devices such as organic field-effect transistors (FETs), organic / polymer electroluminescent diodes (OLEDs), organic photovoltaic cells, organic lasers, organic optical fibers, organic chemical and biological sensors, Organic nano-information memory and so on have appeared one after another, and are playing a very important role day by day. Taking display technology as an example, OLED technology has developed rapidly since 1987, when Kodak Corporation of the United States first published the use of organic materials to make light-emitting diodes, and in 1990, the University of Cambridg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/04B29C41/00C09D127/12
Inventor 黄维冯嘉春
Owner FUDAN UNIV
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