Synthesis and photophysical properties of -alkyl dithieno[3,2-:2',3'-]pyrrole based donor/acceptor-π-conjugated copolymers for solar-cell application.

Two kinds of donor-acceptor π-conjugated copolymer based on poly{[-hexyl-dithieno(3,2-:2',3'-)pyrrole-2,6-diyl]-[isoindigo]} (PDTP-IID) and poly{[-hexyl-dithieno(3,2-:2',3'-)pyrrole-2,6-diyl]-[thiazol-2,5-diyl]} (PDTP-Thz) were investigated. These copolymers were synthesized a Stille coupling reaction. The results showed the structure-property relationships of different donor-acceptor (D-A) combinations.