摘要
CONSPECTUS:Over the past few years,the innovation of narrow bandgap acceptor combined with wide bandgap donor materials significantly promotes the power conversion efficiencies(PCEs)of organic solar cells(OSCs)to exceed 18%.To build a state-of-the-art OSC,absorption spectra,frontier molecular orbital energy levels,molecular packing and crystallinity,and charge carrier mobilities of the photovoltaic materials should be considered in their molecular design.The donor and acceptor materials are the key components determining the photovoltaic performance of the OSCs.The side chain engineering on the conjugated backbone is a critical strategy to optimize the photovoltaic properties of the donor materials.In this Account,we focus on the topic of heteroatom substitution on the molecular backbone of the donor materials for improving their photovoltaic performance,aiming to provide in-depth understanding of the molecular structure optimization for the design of stateof-the-art photovoltaic materials.
基金
We thank the National Natural Science Foundation of China(22022509,51873140,and 51820105003)
Jiangsu Provincial Natural Science Foundation(BK20190095)
Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD),and Collaborative Innovation Center of Suzhou Nano Science and Technology for financial support。
