EVA (ethylene-vinyl acetate) film for flexible or thin-film solar cells and preparation method thereof

A solar cell and thin film technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as low solar cell efficiency, and achieve the effects of improving overall efficiency, preventing light escape, and improving performance

Inactive Publication Date: 2014-07-02
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the optical resonance also causes the nanoparticles to absorb light, which means the solar cell will be less efficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) 8kg of EVA resin (vinyl acetate content of 28%, Guangzhou Xieyu Chemical Co., Ltd.); 91kg of solvent, stirred and blended uniformly with an emulsifier at a temperature of 80~140°C;

[0022] (2) Add 0.0001kg of nano-aluminum powder to the above solution at room temperature and mix with an emulsifier, and then ultrasonically treat to obtain a uniformly mixed colloidal blend;

[0023] (3) The above blend is introduced into a screw mixing extruder for blending and extrusion, and the temperature is controlled at 80~90 ° C. The extrudate is filtered, metered, extruded, cast, cooled, understretched, drawn, and coiled process, the EVA film for solar energy encapsulation was obtained.

[0024] The performance of the thin-film solar cell using this film is 9.6% higher than that of the unused thin-film solar cell.

Embodiment 2

[0026] (1) 8kg of EVA resin (vinyl acetate content of 36%, Guangzhou Xieyu Chemical Co., Ltd.); 91kg of solvent, stirred and blended uniformly with an emulsifier at a temperature of 80~140°C;

[0027] (2) Add 0.0001kg of nano-aluminum powder to the above solution at room temperature and mix with an emulsifier, and then ultrasonically treat to obtain a uniformly mixed colloidal blend;

[0028] (3) The above blend is introduced into a screw mixing extruder for blending and extrusion, and the temperature is controlled at 80~90 ° C. The extrudate is filtered, metered, extruded, cast, cooled, understretched, drawn, and coiled process, the EVA film for solar energy encapsulation was obtained.

[0029] The performance of the thin-film solar cell using the thin film is 12.1% higher than that of the unused thin-film solar cell.

Embodiment 3

[0031] (1) 8kg of EVA resin (vinyl acetate content of 32%, Guangzhou Xieyu Chemical Co., Ltd.); 91kg of solvent, stirred and blended uniformly with an emulsifier at a temperature of 80~140°C;

[0032] (2) Add 0.0001kg of nano-aluminum powder to the above solution at room temperature and mix with an emulsifier, and then ultrasonically treat to obtain a uniformly mixed colloidal blend;

[0033] (3) The above blend is introduced into a screw mixing extruder for blending and extrusion, and the temperature is controlled at 80~90 ° C. The extrudate is filtered, metered, extruded, cast, cooled, understretched, drawn, and coiled process, the EVA film for solar energy encapsulation was obtained.

[0034] The performance of the thin-film solar cell using the thin film is 6.6% higher than that of the unused thin-film solar cell.

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Abstract

The invention relates to an EVA (ethylene-vinyl acetate) film for flexible or thin-film solar cells and a preparation method thereof. The film is prepared from the following components in parts by weight: 8-12 parts of EVA resin, 0.0001-0.1 part of nano aluminum powder and 88-92 parts of solvent. The preparation method comprises the following steps: blending the materials, filtering, introducing into a running die head, cooling, drawing, coiling and the like to obtain the EVA film for solar cells. The product is attached to the photic surface of the thin-film solar cell or used as an upper packaging film of the solar cell to directly enhance the generating efficiency of the flexible or thin-film solar cell.

Description

technical field [0001] The invention relates to an EVA film for flexible or thin-film solar cells and a preparation method thereof. By using the film to be packaged on the surface of the light-incident surface of the flexible or thin-film solar cell, the efficiency of the flexible or thin-film solar cell can be directly improved. Background technique [0002] Among the projects of effective utilization of solar energy: Photovoltaic utilization is the fastest growing and most dynamic research field in recent years. The production of general solar cells is mainly based on semiconductor materials, and photoelectric conversion reactions occur after photoelectric materials absorb light energy to generate electricity. According to the different materials used, solar cells can be divided into: 1. Silicon solar cells; 2. Solar cells made of inorganic salts such as gallium arsenide III-V compounds, cadmium sulfide, copper indium selenide and other multi-component compounds; 3. Solar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/28C08L23/26C08K3/08B29C47/92H01L31/048B29C48/92
CPCB29C2947/92676B29C47/0057B29C2947/92647B29C47/8815B29C47/0021B29C2947/92923B29C47/92B29C48/92B29C2948/92704C08K3/08C08K3/34C08K2003/0812C08K2201/011C08L2203/16C08L2203/204H01L31/0481C08L23/0853C08L31/04C08L23/28B29C48/0018B29C48/08B29C48/365B29C48/911B29C2948/92514B29C2948/92647B29C2948/92676B29C2948/92895B29C2948/92904B29C2948/92923Y02E10/50
Inventor 张迎晨吴红艳
Owner ZHONGYUAN ENGINEERING COLLEGE
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