A highly crystalline non-fused ring small-molecule acceptor as a third component significantly enhances the efficiency of all-polymer solar cells

Abstract

Introducing the small molecule receptor DFTQA-2FIC into the PBDB-T: N2200 binary system resulted in an increase in PCE from 6.45% to 8.07%, which is one of the highest reported values for organic solar cells based on PBDB-T: N2200 to date.