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Fluorescent fluoropolymer thin film for solar cell encapsulation and preparation method thereof

A technology of solar cells and polymer films, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of stability of fluorescent substances, unstable EVA film, accelerated yellowing of EVA, etc., to improve stability and fluorescence. Efficiency, Avoidance of Potential-Induced Attenuation Effect, Effect of Solving Deterioration Problems

Active Publication Date: 2016-08-31
ZHONGTIAN PHOTOVOLTAIC MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the stability of the fluorescent material itself, there will be degradation problems under long-term ultraviolet radiation.
In addition, the EVA film itself is unstable, and it is very prone to hydrolysis. Adding some fluorescent substances often causes or accelerates the yellowing of EVA. Therefore, the EVA film with wavelength conversion function can only stay in the laboratory so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0017] The fluorescent fluoropolymer film for solar cell encapsulation disclosed in the present invention is applied to the solar photovoltaic industry. Its raw material components are: 100 parts by weight of ethylene-tetrafluoroethylene copolymer powder and 0.5 parts of gold quantum The size of the gold quantum dot is 50nm.

[0018] The above materials are mixed uniformly in a high-speed mixer in advance, and then added to a twin-screw extruder, heated to 190°C, melted and extruded, and cast into a film. The film is tempered at 130°C for 3 minutes, air After cooling to room temperature, the film is wound up into a box.

specific Embodiment 2

[0019] The fluorescent fluorine-containing polymer film for solar cell encapsulation disclosed in the present invention is applied to the solar photovoltaic industry. The raw material components are: 100 parts of ethylene-tetrafluoroethylene copolymer powder and 0.01 parts of fluorescent enhancement Whitening agent KCN.

[0020] The above materials are mixed uniformly in a high-speed mixer, and then added to a twin-screw extruder, heated to 215°C, melted and extruded, and cast into a film. The film is tempered at 145°C for 7 minutes, air After cooling to room temperature, the film is wound up into a box.

specific Embodiment 3

[0021] The fluorescent fluoropolymer film for solar cell encapsulation disclosed in the present invention is applied to the solar photovoltaic industry, and its raw material components are: 100 parts by weight of FEP powder, 0.5 parts of rare earth Metal complex EuTP.

[0022] The above-mentioned materials are mixed uniformly in a high-speed mixer, and then added to a twin-screw extruder, heated to 230°C, melted and extruded, and cast into a film. The film is tempered at 160°C After 10 minutes, the air is cooled to room temperature, and the film is reeled into a box.

[0023] The parameters of the finished products prepared in the above three embodiments are as shown in Table 1:

[0024] Table 1 Comparison of performance of materials after UV aging

[0025] project

[0026] The UV aging test condition is in the UV aging experiment box, 15KWh ultraviolet light is irradiated for 3000h, it can be seen that the fluorescent fluoropolymer film has good UV aging resistance.

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Abstract

In the fluorescent fluoropolymer film for encapsulating solar cells disclosed in the present invention, a fluorescent conversion substance is added to the fluoropolymer, and the fluorescent conversion substance accounts for 0.01-20% by mass. The substance is a mixture of one or more of organic fluorescent fuels, quantum dots, rare earth complexes, and inorganic fluorescent powders. The fluorescent fluoropolymer film for encapsulating solar cells disclosed in the present invention solves the problem of material deterioration caused by fluorescent substances, and at the same time, the fluoropolymer film has excellent hydrophobicity and weather resistance, and improves the fluorescence Substance stability and fluorescence efficiency.

Description

Technical field [0001] The invention relates to a fluorine-containing polymer film, in particular to a fluorescent fluorine-containing polymer film for solar cell packaging and a preparation method thereof. Background technique [0002] The short-wavelength ultraviolet light below 360nm and the long-wavelength part of 1200nm in the sunlight spectrum do not contribute to the power generation of silicon solar cells. At the same time, the short-wavelength part of light such as ultraviolet light will accelerate the aging and degradation of packaging materials. Usually for To avoid the harm of ultraviolet light to photovoltaic modules, the method of adding ultraviolet absorber to the packaging material EVA film is used to convert ultraviolet light into heat and dissipate energy. However, this method will increase the operating temperature of the component during power generation and reduce the power generation efficiency of the battery. [0003] In order to make better use of ultraviol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/055H01L31/048C08L23/08C08L27/18C08K3/08C08K11/00
CPCY02E10/52
Inventor 王同心陈坤刘晓娇王强蒋贤明
Owner ZHONGTIAN PHOTOVOLTAIC MATERIALS