| abstract |
A solar cell, comprising a solar cell unit and a protective layer formed on the solar cell unit, wherein said protective layer comprises a polymer formed by polymerization of a cyclotriphosphazene monomer represented by the following formula (I): <IMAGE> (I) wherein R1 to R6 independently denote an ethylenically unsaturated polymerizable group. The cyclophosphazene monomer preferably contains R1 to R6 which are represented by the formula (I): <IMAGE> (II) wherein R7 denotes an alkylene group, arylene group, alkyl-substituted arylene group, alkylamide group arylamide group or polyoxyalkylene group, and R8 denotes a hydrogen atom or a methyl group. The polymer obtained from the cyclotriphosphazene monomer is effective for providing a solar cell having high and stable output efficiency, mechanical durability, and good environmental stability. |