EVA (ethylene vinyl acetate copolymer) packaging adhesive film capable of improving light spectrum conversion efficiency of solar cell module

A solar cell and spectrum conversion technology, applied in electrical components, circuits, adhesives, etc., can solve the problems of increasing the burden of backplane protection, not being able to significantly improve the photoelectric conversion efficiency of cells, and reducing the service life of components, so as to improve photoelectric conversion efficiency Effect

Active Publication Date: 2012-10-17
GUANGZHOU LUSHAN NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cell Response Curve ( figure 1 ) shows that the quantum efficiency in the ultraviolet region is less than 60%, plus the energy loss, this part of the ultraviolet light passing through the adhesive film can not significantly improve the photoelectric conversion efficiency of the cell
And due to the high energy of ultraviolet light, long-term exposure to components will lead to changes in the color and structure of the EVA film, degradation of packaging performance and increased backplane protection burden, reducing the service life of components. In terms of long-term benefits, this method can improve component conversion Efficiency is a trade-off

Method used

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  • EVA (ethylene vinyl acetate copolymer) packaging adhesive film capable of improving light spectrum conversion efficiency of solar cell module
  • EVA (ethylene vinyl acetate copolymer) packaging adhesive film capable of improving light spectrum conversion efficiency of solar cell module
  • EVA (ethylene vinyl acetate copolymer) packaging adhesive film capable of improving light spectrum conversion efficiency of solar cell module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A kind of EVA encapsulating adhesive film that improves the spectral conversion efficiency of solar cell module, it is that 100 mass parts vinyl acetate content is 28%, melt index is 30g / 10min EVA raw material, adds 0.5 parts of cross-linking agent tert-butyl peroxide 2-ethylhexyl carbonate, 0.5 parts of m-phenylbismaleimide, an auxiliary cross-linking agent, 0.5 parts of antioxidant tris(nonylphenyl) phosphite, 0.1 parts of UV absorber 2-(2 '-Hydroxy-5'-tert-octylphenyl) benzotriazole, 1 part light stabilizer bis 2,2,6,6-tetramethyl-4-pyridinol fatty acid ester, 0.3 part coupling agentγ -(Methacryloyloxy)propyltrimethoxysilane, 0.005 parts of spectral conversion material 2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene, mixed uniformly through a mixer, Put it into the casting machine, at 80 ℃, through plasticizing extrusion, stretching, traction, winding to make an EVA film with a thickness of about 0.1mm.

Embodiment 2

[0050] A kind of EVA encapsulating adhesive film that improves the spectral conversion efficiency of solar cell module, it is that 100 mass parts vinyl acetate content is 33%, and melt index is 25g / 10min EVA raw material, adds 1.0 parts of cross-linking agent diphenyl peroxide Acyl, 0.3 parts of co-crosslinking agent ethylene glycol dimethacrylate, 0.4 parts of antioxidant tris(nonylphenyl) phosphite, 0.5 parts of UV absorber 2-hydroxy-4-n-octyloxydiphenyl Methanone, 0.1 part light stabilizer bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 0.8 part coupling agent γ-glycidyl etheroxypropyl trimethoxysilane , 0.01 part of the spectral conversion material distyryl bisbenzoxazole, mixed evenly by the mixer, put into the casting machine, at 80 ℃, plasticized extrusion, stretching, pulling, winding to make a thickness of about 0.5mm EVA film.

Embodiment 3

[0052] A kind of EVA encapsulation adhesive film that improves the spectral conversion efficiency of solar cell module, it is that 100 mass parts vinyl acetate content is 28%, melt index is 30g / 10min EVA raw material, adds 0.8 parts of cross-linking agent diisopropyl peroxide Benzene, 0.9 parts of co-crosslinking agent ethylene glycol dimethacrylate, 0.1 part of antioxidant triphenyl phosphite, 0.3 parts of UV absorber 2-hydroxy-4-n-octyloxybenzophenone, 0.2 parts Light stabilizer bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 0.5 part coupling agent γ-glycidyl etheroxypropyl triethoxysilane, 0.05 part spectrum The conversion material 2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene is mixed evenly by a mixer, put into a casting machine, and plasticized, extruded, stretched, Traction and winding are made into an EVA film with a thickness of about 0.8mm.

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Abstract

The invention particularly relates to an EVA (ethylene vinyl acetate copolymer) packaging adhesive film capable of improving light spectrum conversion efficiency of a solar cell module. The EVA packaging adhesive film is formed by mixing the following components by weight: 80-150 parts of ethylene-vinyl acetate copolymer, 0.5-1.5 parts of a cross-linking agent, 0.1-1 parts of an assistant cross-linking agent, 0.1-0.5 parts of antioxidant, 0.1-1 part of ultraviolet absorbent, 0.1-1s part of light stabilizer, 0.3-1.5 parts of a coupling agent and 0.005-0.3 parts of light spectrum conversion material. According to the EVA packaging adhesive film, owing to addition of the light spectrum conversion material, the ultraviolet light with the wavelength of 300-400 nm can be converted into visible light with the wavelength of 400-550 nm, namely the light spectrum waveband with low quantum efficiency of a crystalline silicon cell is converted to the light spectrum waveband with high quantum efficiency, so that the light spectrum energy is reasonably utilized, and therefore the photoelectric conversion efficiency of the solar cell is improved, and the solar cell is beneficial to popularization and development.

Description

[0001] technical field [0002] The invention relates to an EVA encapsulation film, in particular to an EVA encapsulation adhesive film for improving the spectral conversion efficiency of a solar battery module. [0003] Background technique [0004] Solar energy is a green, non-polluting and inexhaustible energy source. Compared with other energy sources, solar energy is universal and can be used locally in most areas of the earth. Therefore, in the past ten years, the solar energy industry has become a The focus of the development of countries around the world. At present, it is mainly converted into electrical energy through solar panels, and then used for other purposes, such as street lights, refrigerators, electric vehicles, etc. [0005] Solar cells are generally used outdoors in harsh environments, so they need to be protected for use. At present, glass plate (front plate), encapsulation film and back plate are commonly used to package it. Among them, the funct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J123/08C09J11/06H01L31/048
CPCY02E10/50
Inventor 余鹏石俊杰唐舫成汪加胜
Owner GUANGZHOU LUSHAN NEW MATERIALS
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