期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 35, 页码 15181-15185出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202005357
关键词
copolymerization; mechanical properties; polymers; solar cells; synthetic methods
资金
- NSFC [51820105003, 61904181, 21734008]
- Guangdong Major Project of Basic and Applied Basic Research [2019B030302007]
- ONR [N000141712204]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
Demonstrated in this work is a simple random ternary copolymerization strategy to synthesize a series of polymer acceptors, PTPBT-ETx, by polymerizing a small-molecule acceptor unit modified from Y6 with a thiophene connecting unit and a controlled amount of an 3-ethylesterthiophene (ET) unit. Compared to PTPBT of only Y6-like units and thiophene units, PTPBT-ETx(wherexrepresents the molar ratio of the ET unit) with an incorporated ET unit in the ternary copolymers show up-shifted LUMO energy levels, increased electron mobilities, and improved blend morphologies in the blend film with the polymer donor PBDB-T. And the all-polymer solar cell (all-PSC) based on PBDB-T:PTPBT-ET(0.3)achieved a high power conversion efficiency over 12.5 %. In addition, the PTPBT-ET0.3-based all-PSC also exhibits long-term photostability over 300 hours.
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