Unraveling the origin of improved photovoltaic performance in acceptor–acceptor-structured perylene-diimide-based polymeric acceptors through partially fluorinating benzo[<i>c</i>][1,2,5]thiadiazole
Junfeng Tong, Wuyan Liu, Yubo Huang, Zheyu Li, Yan Wang, Suiyan Bai, Zezhou Liang, Lihe Yan, Jianfeng Li, Yangjun Xia
Abstract
PPDI-DTFBT not only possessed better molecular planarity and lower exciton binding energy ( E b ) but also exhibited faster and efficient exciton dissociation and transfer, leading to an increased PCE of 6.04%.
Topics & Concepts
PeryleneDiimidePlanarity testingMaterials scienceAcceptorPhotochemistryDissociation (chemistry)ExcitonBond-dissociation energyMoleculeCrystallographyPhysical chemistryOrganic chemistryChemistryQuantum mechanicsCondensed matter physicsPhysicsOrganic Electronics and PhotovoltaicsConducting polymers and applicationsPerovskite Materials and Applications