| abstract |
An object of the present invention is to provide a novel fullerene derivative usable in n-type semiconductor materials for organic thin-film solar cells and the like. The object is achieved by a fullerene derivative represented by formula (1) n nwherein R 1 represents aryl optionally substituted with at least one substituent, R 2 represents an organic group, R 3 represents an organic group, with the proviso that at least one of R 2 and R 3 is alkyl optionally substituted with at least one substituent or alkyl ether optionally substituted with at least one substituent, R 4 represents hydrogen or an organic group, and a ring A represents a fullerene ring. |