A di(1-benzothieno)[3,2-b:2′,3′-d]pyrrole and isoindigo-based electron donating conjugated polymer for efficient organic photovoltaics

We have synthesized a novel isoindigo-based electron donor polymer (PDBTPI) for organic photovoltaics. The alternating polymer comprising isoindigo and di(1-benzothieno)[3,2-b:2′,3′-d]pyrrole (DBTP) moieties provides the highest power conversion efficiency of over 7% among DBTP-based polymers and a promising efficiency among isoindigo-based polymers.