Figure 1

Chemical structures of (a) poly(methyl methacrylate) (PMMA) and (b) [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM).

Chemical structures of (a) poly(methyl methacrylate) (PMMA) and (b) [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM).