Non-fullerene polymer acceptors based on perylene diimides in all-polymer solar cells.

Abstract All-polymer solar cells (All-PSCs) have attracted a lot of attention in the recent years due to broad absorption spectra, adjustable chemical structures, high morphological stability, better donor-acceptor compatibility and better mechanical durability. This review summarizes the recent development of perylene diimides (PDI)-based electron acceptors used in all-PSCs because these polymers are promising candidates. The photovoltaic performances of non-fullerene polymer acceptors were compared, and the structure-performance relationship was discussed when the same donor material was used. Highlights • Perylene diimides-based (PDI) n-type copolymers are promising electron-acceptor. • D-A alternating copolymers based on PDI is the most promising kind. • Constructing fused-PDI benefit the photovoltaic performance. • Good morphology should be maintained while enhance the electron mobility. [ABSTRACT FROM AUTHOR]