Optimized molecular aggregation and photophysical process synergistically promoted photovoltaic performance in low-regularity benzo[c][1,2,5]thiadiazole-based medium-bandgap copolymers via modulating π bridges

Low regularity PClBDT-TBT not only effectively improved molecular aggregation but also prolonged exciton diffusion time in order to suppress recombination and ameliorate charge transfer, leading to an excellent PCE of 13.04% when paired with Y6.