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- Title
Molecular design revitalizes the low-cost PTV-polymer for highly efficient organic solar cells.
- Authors
Ren, Junzhen; Bi, Pengqing; Zhang, Jianqi; Liu, Jiao; Wang, Jingwen; Xu, Ye; Wei, Zhixiang; Zhang, Shaoqing; Hou, Jianhui
- Abstract
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.
- Subjects
SOLAR cells; PHOTOVOLTAIC power systems; FULLERENE polymers; CHEMICAL structure; RAW materials; THIOPHENES
- Publication
National Science Review, 2021, Vol 8, Issue 8, p1
- ISSN
2095-5138
- Publication type
Article
- DOI
10.1093/nsr/nwab031