Journal
NATIONAL SCIENCE REVIEW
Volume 8, Issue 8, Pages -Publisher
OXFORD UNIV PRESS
DOI: 10.1093/nsr/nwab031
Keywords
organic solar cell; low-cost; simple chemical structure; poly(thienylene vinylene)
Categories
Funding
- Guangdong Major Project of Basic and Applied Basic Research [2019B030302007]
- National Natural Science Foundation of China [22075017, 21835006, 51961135103]
- Fundamental Research Funds for the Central Universities, China [FRF-TP-19-047A2, FRF-BR-19-003B]
- China Postdoctoral Science Foundation [2019M660799]
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In this study, a new ester substituted poly(thiophene vinylene) derivative, PTVT-T, was successfully synthesized with commercially available raw materials. PTVT-T showed excellent compatibility with fullerene- and NF-based acceptors, exhibiting high efficiency in OSCs. With a power conversion efficiency of 16.20% in a PTVT-T:BTP-eC9-based device, this work demonstrates the huge potential of PTVT-T for the future commercialization of OSCs.
Developing photovoltaic materials with simple chemical structures and easy synthesis still remains a major challenge in the industrialization process of organic solar cells (OSCs). Herein, an ester substituted poly(thiophene vinylene) derivative, PTVT-T, was designed and synthesized in very few steps by adopting commercially available raw materials. The ester groups on the thiophene units enable PTVT-T to have a planar and stable conformation. Moreover, PTVT-T presents a wide absorption band and strong aggregation effect in solution, which are the key characteristics needed to realize high performance in non-fullerene-acceptor (NFA)-based OSCs. We then prepared OSCs by blending PTVT-T with three representative fullerene- and NF-based acceptors, PC71BM, IT-4F and BTP-eC9. It was found that PTVT-T can work well with all the acceptors, showing great potential to match new emerging NFAs. Particularly, a remarkable power conversion efficiency of 16.20% is achieved in a PTVT-T:BTP-eC9-based device, which is the highest value among the counterparts based on PTV derivatives. This work demonstrates that PTVT-T shows great potential for the future commercialization of OSCs.
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