Solution processed small molecule bulk heterojunction organic photovoltaics based on a conjugated donor–acceptor porphyrin

Due to the π-conjugation of the whole molecule along with the push–pull property of a newly designed conjugated donor–acceptor porphyrin, the solution processed solar cells using the blend of the porphyrin small molecule with PC71BM exhibit a promising performance with a power conversion efficiency of up to 4.02%.