| Abstract: | Bulk-heterojunction polymer solar cells(PSCs)as a clean and renewable energy resource have attracted great atten-tion from both academia and industry[1-20].Recently non-fullerene PSCs based on polymer donors(PDs)and small mo-lecule acceptors(SMAs)have achieved remarkable success with the power conversion efficiencies(PCEs)over 18％[21-26].Among various PSCs,all-polymer solar cells(all-PSCs)consist of PDs and polymer acceptors(PAs),showing unique merits including superior stability and mechanical robustness.How-ever,the development of all-PSCs lag behind SMAs-based PSCs due to the scarcity of high-performance PAs[6]. |
