High-performance wide-bandgap copolymers with dithieno3,2-b:20 ,30 -dpyridin-5(4H)-one units

摘要

Two wide-bandgap copolymers (PBD and PBD2T) containing dithieno[3,2-b:20 ,30 -d]pyridin-5(4H)-one units were designed. They have large optical bandgaps and deep HOMO levels. Solar cells based on them and a nonfullerene acceptor IT-M gave high open-circuit voltages up to 1.00 V and decent power conversion efficiencies up to 10.34%.