期刊
SOLAR RRL
卷 3, 期 4, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/solr.201900005
关键词
complementary absorption; high open-circuit voltage; wide bandgap polymer
资金
- National Natural Science Foundation of China [51773220, 21805068, 51573205, 21502205, 61405209]
- Shandong Provincial Natural Science Foundation [ZR2017ZB0314]
- DICP & QIBEBT, Dalian National Laboratory for Clean Energy (DNL) CAS [DICPQIBEBT UN201709]
A novel phenyl substituted benzo(1,2-b:4,5-b')dithiophene (BDT) derivative containing both fluorine and sulfur atoms is designed and synthesized. Furthermore, a wide bandgap polymer PBTA-PSF based on the derivative shows a low highest occupied molecular orbital energy level and slightly reduces the donor materials' optical bandgap, which has a complementary absorption with a narrow-bandgap n-type small molecule ITIC. As a result, a power conversion efficiency of 13.91% is achieved with a high open-circuit voltage of 1.01V, and a large short-circuit current density of 18.51mAcm(-2). The result demonstrates that PBTA-PSF is a promising candidate for high-performance donor and phenyl-containing BDT derivatives and has potential in the design of high-performance polymers for organic photovoltaics.
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