Optimized molecular aggregation and photophysical process synergistically promoted photovoltaic performance in low-regularity benzo[<i>c</i>][1,2,5]thiadiazole-based medium-bandgap copolymers <i>via</i> modulating π bridges
Junfeng Tong, Yubo Huang, Wuyan Liu, Mengdie Shou, Lili An, Xuefeng Jiang, Pengzhi Guo, Yang Han, Zezhou Liang, Jianfeng Li, Yangjun Xia
Abstract
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.
Topics & Concepts
Materials scienceExcitonPhotovoltaic systemBand gapDiffusionCopolymerOptoelectronicsCharge (physics)RecombinationPhotochemistryPolymerChemistryComposite materialPhysicsGeneBiologyThermodynamicsEcologyQuantum mechanicsBiochemistryOrganic Electronics and PhotovoltaicsPerovskite Materials and ApplicationsConducting polymers and applications