POLYESTER FILM SOLAR CELL BACKSHEET AND SOLAR CELL

摘要

The present invention addresses the problem of providing a polyester film that does not experience a decline in wet heat resistance even when incorporated into a solar cell backsheet or solar cell. The problem is resolved by a polyester film having a peak count (SPc) (400 nm) of at least 100 and an SPc (4000 nm) of at most 10 on at least one surface the polyester film having a carboxyl terminal content of 0 25 eq/ton.