Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 139, Issue 9, Pages 3356-3359Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b00566
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Funding
- National Natural Science Foundation of China [91233205, 20774099, 21574013, 51673028]
- Program for Changjiang Scholars and Innovative Research Team in University
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We have developed a kind of novel fused ring small molecular acceptor, whose planar conformation can be locked by intramolecular noncovalent interaction. The formation of planar supramolecular fused-ring structure by conformation locking can effectively broaden its absorption spectrum, enhance the electron mobility, and reduce the nonradiative energy loss. Polymer solar cells (PSCs) based on this acceptor afforded a power conversion efficiency (PCE) of 9.6%. In contrast, PSCs based on similar acceptor, which cannot form a flat conformation, only gave a PCE of 2.3%. Such design strategy, which can make the synthesis of small molecular acceptor much easier, will be promising in developing a new acceptor for high efficiency polymer solar cells.
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