Journal
SMALL
Volume 19, Issue 3, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202205594
Keywords
all-small molecule organic solar cells; morphology modulation; non-fullerene acceptors; power conversion efficiency; small molecule donors
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This review summarizes recent progress in small-molecule donors and non-fullerene acceptors in organic solar cells, highlighting the structure-property relationships and morphology regulation strategies. Challenges and outlook for all-small-molecule organic solar cells are also discussed.
Active layer material plays a critical role in promoting the performance of an organic solar cell (OSC). Small-molecule (SM) materials have the merits of well-defined chemical structures, few batch-to-batch variations, facile synthesis and purification procedures, and easily tuned properties. SM-donor and non-fullerene acceptor (NFA) innovations have recently produced all-small-molecule (ASM) devices with power conversion efficiencies that exceed 17% and approach those of their polymer-based counterparts, thereby demonstrating their great future commercialization potential. In this review, recent progress in both SM donors and NFAs to illustrate structure-property relationships and various morphology-regulation strategies are summarized. Finally, ASM-OSC challenges and outlook are discussed.
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