Side chain polymerization for non-conjugated polymer acceptors

The typical design strategy for non-conjugated polymer acceptors involves the alternating distribution of small molecule acceptor units and non-conjugated units along the main chain. In this study, we proposed a novel design strategy for non-conjugated polymer acceptors and synthesized a non-conjugated polymer acceptor (SPA-1) incorporating grafted A-DA'D-A type small molecule units within its side chain. The binary all-polymer solar cells (All-PSCs) based on PBDB-T:SPA-1 showed a power conversion efficiency (PCE) of 11.16%, and the ternary All-PSCs based on PM6:PY-IT:SPA-1 achieved a PCE of 17.91%.