Adhesive Reliability Study at the Encapsulant/Backsheet Interface of Solar Modules for Various Ethylene-Vinyl Acetate Copolymer White Films

White EVA film has recently been widely applied between the solar cells and the backsheet to improve the light reflection and gain more power. The peel strength between EVA layer and backsheet may decrease in damp heat environments. The decline in peel strength may vary for different EVA films as we...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2021-03, Vol.696 (1), p.12014
Main Authors: Zhuang, Hao, Huang, Guoping, Jiang, Yashuai, Sun, Guan, Bai, Xueliang, Li, Jingnan
Format: Article
Language:English
Subjects:
Acetic acid
Bonding strength
Copolymers
Ethylene vinyl acetates
Heat
Light reflection
Peel strength
Performance degradation
Photovoltaic cells
Reliability analysis
Solar cells
Vinyl acetate
Weather
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Summary:White EVA film has recently been widely applied between the solar cells and the backsheet to improve the light reflection and gain more power. The peel strength between EVA layer and backsheet may decrease in damp heat environments. The decline in peel strength may vary for different EVA films as well as different match with backsheets. In this work, the weather resistance performance of four different white EVA films were comparatively studied with four different backsheets. Peel strength before and after the damp heat test for 1000h and 1500h was measured. For the interface with low initial peel strength, increase in bonding force was observed after the damp heat test. For the interface with high initial peel strength, degradation in bonding force may probably occur. These results suggest that a higher initial performance cannot always ensure a higher performance after degradation.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/696/1/012014