Starting from two e?cient photovoltaic polymers, a novel two-dimensional conjugated BDT-basedpolymer, PBDT-TS1 was designed, synthesized by introducing linear side chain and a high PCE of 9.48% was achieved by PBDT-TS1:PC71BM-based PSC evaluating with the simple conventional device. More importantly, due to the high starting point acquired in simple conventional device, PCEs of 10% or even higher would be realized in single-junction PSC by integrating more e?cient device structures, such as inverted, plasmonic, or microcavity architectures
