C71 butyric acid methyl ester (PC71BM) and indene-C60 bisadduct (ICBA), in a poly (3-
hexylthiophene) blend solar cell during a prolonged thermal aging process. High electron
mobility does not correlate with the best device performance in our study of the P3HT:
PC71BM and P3HT: ICBA systems. Very little changes are observed in the polymer
crystallinity as a function of time. The evolution of the acceptor appears to be the dominant …