EVA film for packaging high-transmittance solar cell and preparation method thereof

A solar cell, high light transmittance technology, applied in photovoltaic power generation, circuits, adhesives, etc., can solve the problems of strength and toughness enhancement, light transmittance to be improved, etc., to increase strength, improve photoelectric efficiency, and improve light transmittance. Effect

Inactive Publication Date: 2012-04-11
陈光伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of this type of adhesive film are: first, the light transmittance still needs to be improved in order to improve the photoelectric conversion efficiency of solar cell components; second, the strength and toughness of the adhesive film need to be strengthened in order to prolong the service life of the adhesive film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Commercially available fumed silica was selected as the nucleating antireflection agent. In parts by weight, add 0.1 part of nucleating antireflection agent fumed silica, directly add 0.15 part of tackifier 3-glycidyl etheroxypropyl trimethoxysilane, mix evenly, add 100 parts of EVA pellets and mix Uniformly, then add hindered amine light stabilizer namely 0.1 part of polysuccinic acid (4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol) ester and 0.1 part of bis(2,2, 6,6-Tetramethyl-4-piperidinyl) sebacate, 0.3 part antioxidant?-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate n-octadecyl , 1.3 parts of cross-linking curing agent, that is, a mixture of 2.5-dimethyl-2,5-bis(tert-butylperoxy)hexane and peroxy-2-ethylhexyl tert-butyl carbonate (weight ratio 1:3 ), and mix well. Pour the above mixture into the extruder for blending and extrusion. The temperature is controlled at 90°C. The extruded product is cast, cooled, drawn, and coiled to obtain an EVA film with a thic...

Embodiment 2

[0037]Commercially available fumed silica was grafted and modified as a nucleating antireflection agent, and 3-aminopropyltriethoxysilane was selected as a modifier. In terms of parts by weight, disperse 0.1 part of fumed silica and 0.05 part of modifier in an appropriate amount of toluene, reflux and stir for 2 hours, and then heat up (110°C-120°C) and cure for 2 hours to obtain modified silica Silicon; add 0.15 parts of tackifier 3-glycidyl etheroxypropyl trimethoxysilane and mix evenly, add 100 parts of EVA pellets and mix evenly, then add hindered amine light stabilizer, namely 0.1 part of polysuccinic acid ( 4-Hydroxy-2,2,6,6-tetramethyl-1-piperidinyl ethanol) ester and 0.1 part of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate , 0.3 parts of antioxidant?-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate, add 2 parts of cross-linking curing agent namely 2.5-dimethyl-2,5 - Bis(tert-butylperoxy) hexane and peroxy-2-ethylhexyl tert-butyl carbonate mixture (weight ...

Embodiment 3

[0039] Select high-purity nano-silica (prepared by hydrolysis of silicon tetrachloride) for graft modification as a nucleating anti-reflection agent, and select dimethylvinylmethoxysilane as a modifier. In parts by weight, disperse 0.1 part of high-purity nano-silica and 0.05 part of modifier in toluene, reflux and stir for 2 hours, then heat up (110°C-120°C) and cure for 2 hours to obtain modified high-purity Nano silica; add 0.15 parts of tackifier 3-glycidyl etheroxypropyl trimethoxysilane and mix evenly, add 100 parts of EVA pellets and mix evenly, then add hindered amine light stabilizer, namely 0.1 part of polybutylene Diacid (4-hydroxy-2,2,6,6-tetramethyl-4-piperidinyl ethanol) ester and 0.1 part of bis(2,2,6,6-tetramethyl-4-piperidinyl)decane Diacid ester, 0.3 parts of antioxidant?-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate, 1.3 parts of cross-linking curing agent, namely 2.5-dimethyl-2 ,5-bis(tert-butylperoxy)hexane and peroxy-2-ethylhexyl tert-butyl ...

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Abstract

The invention relates to an EVA (Ethylene Vinyl Acetate) film and a preparation method thereof. The purpose of the invention is to provide the film having higher transmittance and high stability. The technical proposal adopted is as follows: the EVA film for packaging a high-transmittance solar cell comprises an ethylene-vinylacetate copolymer, wherein the EVA film comprises the following components according to part by weight: 100 parts by weight of ethylene-vinylacetate copolymer, 0.1-6 parts by weight of cross-linking curing agent, 0.05-5 parts by weight of nucleating transparent agent, 0.02-3 parts by weight of light stability, 0.05-5 parts by weight of antioxidant and 0.01-4.0 parts by weight of tackifier. The preparation method comprises the following steps of: (1) mixing the nucleating transparent agent with the tackifir; (2) evenly mixing the light stability with the antioxidant; (3) evenly mixing the cross-linking curing agent with the ethylene-vinylacetate copolymer particles; and (4) adding the mixtures obtained in the steps (1) and (2) to the mixture obtained in the step (3), and evenly mixing the mixtures together and then performing blending extrusion.

Description

technical field [0001] The invention relates to a solar cell packaging material, in particular to an EVA adhesive film with high light transmittance and used for solar cell packaging and a preparation method thereof. Background technique [0002] Solar cells are packaged with silicon wafers by means of two layers of polymer encapsulation films, and then bonded with upper and lower protective layer materials. In order to ensure that the packaged solar cell module has sufficient photoelectric conversion efficiency, the packaging material must be transparent, and the higher the light transmittance, the more light received by the silicon wafer in the cell module, and the higher the photoelectric conversion efficiency. In addition, the packaging material must have strong adhesive properties and aging resistance to ensure the stability and reliability of solar modules. [0003] EVA (Ethylene-Vinyl Acetate Copolymer; Ethylene-vinyl acetate copolymer) resin is a non-crystalline pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J123/08C09J11/04C09J11/06H01L31/048
CPCY02E10/50
Inventor 陈光伟
Owner 陈光伟
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