Encapsulating material for solar cell and solar cell module

摘要

An encapsulating material for solar cell that is capable of suppressing the corrosion of metal and the occurrence of yellowing at a high temperature and has excellent long-term reliability in a constant temperature and humidity is provided.;The encapsulating material for solar cell of the invention contains an ethylene/α-olefin copolymer, a hindered amine-based light stabilizer, a hindered phenol-based stabilizer, and a phosphorous-based stabilizer as essential components.

主权项

1. A solar cell module comprising:
a transparent surface protective member; a back surface protective member; a solar cell element; and an encapsulating layer which is formed by crosslinking an encapsulating material for solar cell and encapsulates the solar cell element between the transparent surface protective member and the back surface protective member, wherein the encapsulating material for solar cell comprises an ethylene/α-olefin copolymer, a hindered amine-based light stabilizer, a hindered phenol-based stabilizer, and a phosphorous-based stabilizer, a content of the hindered phenol-based stabilizer in the encapsulating material for solar cell is in a range of 0.01 parts by weight to 0.06 parts by weight with respect to 100 parts by weight of the ethylene/α-olefin copolymer, a content of the phosphorous-based stabilizer in the encapsulating material for solar cell is in a range of 0.02 parts by weight to 0.2 parts by weight with respect to 100 parts by weight of the ethylene/α-olefin copolymer, wherein the hindered phenol-based stabilizer includes octadecyl-3-(3,5-di-t-butyl-4-hydroxphenyl)propionic acid ester, and the phosphorous-based stabilizer includes tris(2,4-di-tert-butylphenyl)phosphite.