A facilely synthesized lactam acceptor unit for high-performance polymer donors

Abstract

An aromatic lactam acceptor unit, [2,2′-bidithieno[3,2-b:2′,3′-d]pyridine]-5,5′(4H,4′H)-dione (BDTP_i), was developed for making D–A copolymer donors. Two D–A copolymers, PThBDTP_i and PSeBDTP_i, gave power conversion efficiencies (PCEs) of 8.11% and 6.50%, respectively, when using PC₇₁BM as the acceptor.