Selective halogenation of central and end-units of nonfullerene acceptors enables enhanced molecular packing and photovoltaic performance
Meiling Xie, Yanan Shi, Lingyun Zhu, Jianqi Zhang, Qian Cheng, Hao Zhang, Yangjun Yan, Mingquan Zhu, Huiqiong Zhou, Kun Lü, Zhixiang Wei
Abstract
Qx- p -4Cl with both a para -fluorinated central unit and chlorinated end groups exhibits enhanced molecular packing, facilitating efficient charge transport, and thus achieving a power conversion efficiency (PCE) of 18.78% when blended with donor PM6.
Topics & Concepts
HalogenationPhotovoltaic systemEnergy conversion efficiencyMaterials scienceUnit (ring theory)NanotechnologyChemistryChemical engineeringOptoelectronicsOrganic chemistryElectrical engineeringEngineeringMathematicsMathematics educationOrganic Electronics and PhotovoltaicsOrganic and Molecular Conductors ResearchPerovskite Materials and Applications