A chlorinated phenazine-based donor–acceptor copolymer with enhanced photovoltaic performance†
Abstract
Chlorinated phenazine-based donor–acceptor conjugated copolymer PCTClP was designed and synthesized through Suzuki coupling polymerization. Compared to the unsubstituted copolymer PCTP, PCTClP exhibited a narrower band gap and a lower HOMO energy level. PCTClP/PC71BM based polymer solar cells show improved photovoltaic performance with power conversion efficiencies up to 4.06%.