摘要
The exquisite design and persistent development of fused-ring-acceptor-unit-based copolymer donors and Yseries nonfullerene acceptors(NFAs)have pushed the power conversion efficiencies(PCEs)for organic solar cells onto the18%level[1-21].Our group invented copolymer donors D18 and D18-Cl[2,3].D18:Y6,D18-Cl:N3 and D18:N3 solar cells have delivered outstanding PCEs of 18.22%,18.13%and18.56%,respectively[2-4].Ternary solar cells based on a polymer donor,a NFA and a fullerene acceptor show great potential since they combine good light-harvesting capability of NFA and good electron-mobility of fullerene[5].
基金
National Key Research and Development Program of China(2017YFA0206600)
the National Natural Science Foundation of China(51773045,21772030,51922032,21961160720)for financial support。
