Solar cell sealing film and solar cell using the sealing film

摘要

The object of the present invention is to provide a solar cell sealing film obtained from a composition comprising chiefly ethylene-vinyl acetate copolymer and organic peroxides for giving crosslinked structure, which suppresses the occurrence of blisters without reduction of crosslink rate, even if the film contains silane-coupling agents for improving adhesive strength. The solar cell sealing film comprises ethylene-vinyl acetate copolymer, an organic peroxide, a silane-coupling agent, and a phosphite compound represented by formula (I):
P(OR1)3  (I)
wherein, R1 is a branched-chain aliphatic alkyl group having 8 to 14 carbon atoms, and three R1s are the same as or different from each other and further wherein the content of the vinyl acetate recurring unit of the ethylene-vinyl acetate copolymer is in the range of 20 to 35% by weight.

主权项

1. A solar cell sealing film obtained from a composition consisting essentially of:
ethylene-vinyl acetate copolymer, an organic peroxide, a silane-coupling agent, and a phosphite compound, wherein the phosphite compound is triisodecyl phosphite, wherein the organic peroxide is 2,5-dimethyl-2,5-di(2-ethylhexanoylperoxy)hexane, wherein the silane-coupling agent is γ-methacryloxypropyl trimethoxysilane, the organic peroxide is contained in an amount of 1.3 to 1.8 parts by weight based on 100 parts by weight of the ethylene-vinyl acetate copolymer, the silane-coupling agent is contained in an amount of 0.05 to 1 part by weight based on 100 parts by weight of the ethylene-vinyl acetate copolymer and the phosphite compound is contained in an amount of 0.05 to 1 part by weight based on 100 parts by weight of the ethylene-vinyl acetate copolymer, and wherein the content of the vinyl acetate recurring unit of the ethylene-vinyl acetate copolymer is in the range of 20 to 35% by weight.