Block-copolymer-nanowires with nanosized domain segregation and high charge mobilities as stacked p/n heterojunction arrays for repeatable photocurrent switching

Efficient performance requires well-controlled segregation of electron donor and acceptor moieties, which is achieved by using block copolymers of tetraphenylporphinatozinc(II) (donor) and [C.sub.60] fullerene (acceptor) using living ring-opening metathesis polymerization (ROMP). Thin films of the self-assembled nanophase-segregated copolymers have displayed high charge carrier mobilities and electrical conductivities as well as highly repeatable photocurrent switching with rapid ON/OFF responses upon white light irradiation.