Regio-Specific Selenium Substitution in Non-Fullerene Acceptors for Efficient Organic Solar Cells

A set of isomeric ladder type non-fullerene acceptors (NFAs), SRID-4F and TRID-4F, was designed and synthesized to systematically investigate the structure–property relationship of selenium substitution on A-D-A type NFAs. It was found that regio-specific selenium substitution not only affects the o...

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Bibliographic Details
Published in:Chemistry of materials 2019-09, Vol.31 (17), p.6770-6778
Main Authors: Lin, Francis, Zuo, Lijian, Gao, Ke, Zhang, Ming, Jo, Sae Byeok, Liu, Feng, Jen, Alex K.-Y
Format: Article
Language:English
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Summary:A set of isomeric ladder type non-fullerene acceptors (NFAs), SRID-4F and TRID-4F, was designed and synthesized to systematically investigate the structure–property relationship of selenium substitution on A-D-A type NFAs. It was found that regio-specific selenium substitution not only affects the optical and electrochemical properties but also changes the morphology of thin films. Photovoltaic devices based on SRID-4F showed a high power conversion efficiency of >13% when paired with polymeric donor PBDB-T-2F.
ISSN:0897-4756
1520-5002
DOI:10.1021/acs.chemmater.9b01242