摘要
Strategic design of solid additives for regulating molecular aggregation and crystallinity in organic photovoltaic systems is crucial for enhancing device efficiency and stability.Herein,we introduce 3,5-dibromoanisole(DBA),a volatile solid additive synergistically integrating halogen and alkoxy functionalities,to optimize the PM6:Y6 active layer.DBA simultaneously interacts with both PM6 and Y6,promoting face-on molecular orientation and fibrillar network formation.Consequently,DBA-treated devices achieve a power conversion efficiency(PCE)of 18.34%,with a short-circuit current density(J_(SC))of 28.24 mA·cm^(–2) and a fill factor(FF)of 78.6%,surpassing the control device(PCE=17.13%).Notably,the DBA additive exhibits exceptional stability and demonstrates broad applicability across multiple material systems.This study establishes a universal framework for designing multifunctional solid additives,paving the way for scalable,high-efficiency organic solar cells(OSCs).
基金
support from the National Natural Science Foundation of China(52303259,52373176)
Open Cooperation Foundation of the Department of Chemical Science of Henan University.
