Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 139, Issue 21, Pages 7148-7151Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b02677
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Funding
- NSFC [91333204, 21325419, 51673201]
- Chinese Academy of Sciences [XDB12030200, KJZD-EW-J01]
- National Basic Research Program 973 [2014CB643501]
- CAS-Croucher Funding Scheme for Joint Laboratories [CAS14601]
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A new polymer donor (PBDB-T-SF) and a new small molecule acceptor (IT-4F) for fullerene-free organic solar cells (OSCs) were designed and synthesized. The influences of fluorination on the absorption spectra, molecular energy levels, and charge mobilities of the donor and acceptor were systematically studied. The PBDB-T-SF:IT-4F-based OSC device showed a record high efficiency of 13.1%, and an efficiency of over 12% can be obtained with a thickness of 100-200 nm, suggesting the promise of fullerene-free OSCs in practical applications.
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