期刊
SCIENCE CHINA-CHEMISTRY
卷 64, 期 2, 页码 228-231出版社
SCIENCE PRESS
DOI: 10.1007/s11426-020-9868-8
关键词
organic solar cells; unfused nonfullerene acceptor; benzotriazole moiety
资金
- National Natural Science Foundation of China [21774130, 51925306]
- National Key R&D Program of China [2018FYA 0305800]
- Key Research Program of Frontier Sciences, CAS [QYZDB-SSW-JSC046]
- Key Research Program of the Chinese Academy of Sciences [XDPB08-2]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB28000000]
- International Partnership Program of Chinese Academy of Sciences [211211KYSB20170014]
- China Postdoctoral Science Foundation [2020M670425]
In recent years, significant improvements have been made in the power conversion efficiency (PCE) of organic solar cells (OSCs) by exploring new active layer materials, especially high efficiency acceptors. Unfused-ring acceptors (UFAs) have attracted attention for their advantages of simple synthesis and low cost compared to fused-ring acceptors. The synthesis of a new UFA BTzO-4F incorporating benzotriazole moiety and intramolecular noncovalent interactions has led to a record PCE of 13.8% for UFAs, demonstrating the great potential of UFAs for high performance OSCs.
In recent years, power conversion efficiency (PCE) of organic solar cells (OSCs) has made significant improvement. A large number of studies were reported to achieve high PCEs through exploring new active layer materials, especially the high efficiency fused ring acceptors (FRAs). Compared with FRAs, another type of so-called unfused-ring acceptors (UFAs), possessing some advantages such as simple synthesis and low cost, have attracted a lot of attention. Herein, a new UFA BTzO-4F, incorporating with a benzotriazole moiety and SMIDLINE HORIZONTAL ELLIPSISO intramolecular noncovalent interactions, has been successfully synthesized. The photovoltaic device based on PBDB-T:BTzO-4F achieved a record PCE of 13.8% for UFAs, which indicates that introducing the benzotriazole moiety is an effective strategy for high quality acceptors. Thus, these findings of this work demonstrate the great potential of UFAs for high performance OSCs.
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