期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 39, 页码 12911-12915出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201807865
关键词
chlorination; intra/intermolecular charge transfer; molecular orientation; polymer donors; polymer solar cells
资金
- NSFC [51703228, 51673201, 21734008]
- Chinese Academy of Sciences [XDB12030200]
Chlorinated conjugated polymers not only show great potential for the realization of highly efficient polymer solar cells (PSCs) but also have simple and high-yield synthetic routes and low-cost raw materials available for their preparation. However, the study of the structure-property relationship of chlorinated polymers is lagging. Now two chlorinated conjugated polymers, PCl(3)BDB-T and PCl(4)BDB-T are investigated. When the polymers were used to fabricate PSCs with the nonfullerene acceptor (IT-4F), surprisingly, the PCl(3)BDB-T:IT-4F-based device exhibited a negligible power conversion efficiency (PCE) of 0.18%, while the PCl(4)BDB-T:IT-4F-based device showed an outstanding PCE of 12.33%. These results provide new insight for the rational design and synthesis of novel chlorinated polymer donors for further improving the photovoltaic efficiencies of PSCs.
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