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A kind of packaging film for flexible solar cell

A solar cell and encapsulation film technology, applied in circuits, electrical components, photovoltaic power generation, etc., can solve problems such as difficulty in maintaining adhesion, reduced efficiency of photovoltaic modules, and failure, so as to improve the ability to withstand ultraviolet aging and avoid migration And bleaching, to ensure long-term adhesion effect

Active Publication Date: 2020-04-10
LUCKY HUAGUANG GRAPHICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large difference in properties between different film layers in this composite film, the stress generated during later use often leads to interlayer peeling, resulting in a decrease in the efficiency of photovoltaic modules
During the actual use, it was also found that due to the limited water vapor and ultraviolet blocking ability of the fluoropolymer layer itself, long-term humid and hot environment and ultraviolet radiation will also cause damage between the fluoropolymer layer and the adhesive layer and between the adhesive layer and the barrier layer. In addition, the composite film needs to withstand thermal shock above 150°C during the later component packaging process, and different thermomechanical properties will also lead to delamination between the fluoropolymer layer, adhesive layer, and barrier layer
Corona treatment on the bonding interface can improve the initial adhesion to a certain extent, but it is difficult to maintain the adhesion for a long time

Method used

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  • A kind of packaging film for flexible solar cell
  • A kind of packaging film for flexible solar cell
  • A kind of packaging film for flexible solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Preparation of gas barrier films

[0053] The first step: use a PET film with a thickness of 100 μm as the substrate, and coat a planarization layer with a thickness of 2 μm on its surface through a micro-gravure plate. The matrix resin of the planarization layer is a polyurethane-modified acrylic polymer;

[0054] Step 2: On the above-mentioned planarization layer, a silicon oxycarbide inorganic barrier layer is deposited using PECVD equipment, and the thickness of the inorganic barrier layer is 200 nm.

[0055] Preparation of adhesion-promoting layer:

[0056] 500g of acryltrimethoxysilane and 500g of butyl acrylate were dissolved in 5kg of toluene, 50g of dibenzoyl peroxide was added, and reacted at 80°C for 24h under nitrogen protection to obtain a polymer with a number average molecular weight of 30,000, which was used as Component B1 is used. Dissolve 10g of A1 and 90g of B1 in 400g of toluene, add 1g of dibutyltin dilaurate, stir to dissolve and let it stand fo...

Embodiment 2

[0060] The process of gas barrier layer, tackifying layer and adhesive compounding is the same as that of Example 1, except that the weight ratio of A1 and B1 in the tackifying layer is 20:80.

[0061] The interlayer structure and the thickness of each layer of the encapsulation film are the same as in Example 1.

Embodiment 3

[0063] The process of gas barrier layer, tackifying layer and adhesive compounding is the same as that of Example 1, except that the weight ratio of A1 and B1 in the tackifying layer is 30:70. The interlayer structure and the thickness of each layer of the encapsulation film are the same as in Example 1.

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Abstract

The invention relates to a packaging film for flexible solar cells, which sequentially comprises a substrate, a barrier layer, an adhesive layer, an adhesion-promoting layer, and a fluorine-containing polymer layer. A layer of adhesion-promoting layer is arranged between the fluorine-containing polymer layer and the bonding layer, and the adhesion-promoting layer is mainly composed of organosilicon compound A containing ultraviolet absorbing groups and organosilicon-modified acrylic polymer B, so The weight ratio of component A to component B is 1:99-50:50, and the obtained packaging film for flexible solar cells has excellent gas barrier properties, moisture and heat aging resistance, thermal shock resistance, and ultraviolet radiation resistance.

Description

technical field [0001] The invention relates to the technical field of thin films, in particular to a packaging film for flexible solar cells. Background technique [0002] In recent years, due to global environmental issues and the consumption of fossil fuels, renewable clean energy has attracted much attention. Among them, solar energy, as an inexhaustible clean energy, has been paid more and more attention by people. [0003] As a new type of solar cell, flexible thin-film solar cell has been paid more and more attention by people because of its advanced technology, excellent performance and wide application. When used to build power stations, thin-film solar modules need to be used outdoors for more than 25 years without reducing output efficiency. Therefore, encapsulation films for flexible thin film solar cells need to have excellent light transmittance, weather resistance, flexibility and high water barrier properties. [0004] In order to meet the above requiremen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0216H01L31/048H01L51/44
CPCH01L31/02167H01L31/0481H10K30/88Y02E10/549
Inventor 王群宣玉凤刘墨宁王亚丽霍弘宋鑫
Owner LUCKY HUAGUANG GRAPHICS
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