Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 6, Issue 2, Pages 423-433Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta08669e
Keywords
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Funding
- National Natural Science Foundation of China (NSFC) [51473075, 51673092, 21402080, 21762029]
- National Science Fund for Distinguished Young Scholars [51425304]
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The molecular design strategy for high-performance photoelectric materials emphasizes the intrinsic charge transfer/transport as well as the role of the polymer chemical structure and chain conformation. Here, we report a new interface engineering strategy for non-fullerene polymer solar cells (PSCs) by employing highly conductive polyelectrolyte interface layers with a fluorinated conjugated backbone. The fluorine atom-induced strong n-type self-doping effect and optimized expanded conformation were observed to substantially improve their intrinsic charge mobility. An outstanding power conversion efficiency of 11.51% was obtained when applying the new polyelectrolyte interlayer in PSCs based on a PBDB-T:ITIC active layer.
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