Journal
CHEMICAL COMMUNICATIONS
Volume 53, Issue 90, Pages 12213-12216Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cc07494h
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Funding
- National Key Basic Research and Development Program of China (973 program) [2015CB655001]
- National Natural Science Foundation of China [51373165, 21625403]
- Jilin Scientific and Technological Development Program [20170519003JH]
- Chinese Academy of Sciences [XDB12010200]
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Organoboron compounds offer new approaches to tune the electronic structures of pi-conjugated molecules. In this work, an electron acceptor (M-BNBP4P-1) is developed by endcapping an organoboron core unit with two strong electron-withdrawing groups. M-BNBP4P-1 exhibits a unique wide absorption spectrum with two strong absorption bands in the long wavelength region (lambda(max) = 771 nm) and the short wavelength region (lambda(max) = 502 nm), which indicate superior sunlight harvesting capability. This is due to its special electronic structure, i.e. a delocalized LUMO and a localized HOMO. Prototype solution-processed organic solar cells based on M-BNBP4P-1 show a power conversion efficiency of 7.06% and a wide photoresponse from 350 nm to 880 nm.
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