| 摘要 |
Disclosed is a back sheet for a solar cell, which has weather resistance that is improved advantageously in the viewpoint of cost. A back sheet (7) for a solar cell, which is a preferable embodiment of the present invention, is characterized in that the liquid crystal polyester constituting a liquid crystal polyester base is composed of structural units represented by the formulae (1), (2) and (3) shown below. When the total of divalent aromatic groups Ar1, Ar2 and Ar3 contained in the structural units represented by the formulae (1), (2) and (3) is taken as 100% by mole, not less than 40% by mole of 2,6-naphthalenediyl group is contained therein. (1) -O-Ar1-CO- (2) -CO-Ar2-CO- (3) -O-Ar3-O- (In the formulae, Ar1 represents one or more groups selected from the group consisting of a 2,6-naphthalenediyl group, a 1,4-phenylene group and a 4,4'-biphenylene group; and Ar2 and Ar3 each independently represents one or more groups selected from the group consisting of a 2,6-naphthalenediyl group, a 1,4-phenylene group, a 1,3-phenylene group and a 4,4'-biphenylene group.) |
