An efficient medium-bandgap nonfullerene acceptor for organic solar cells?
Journal of Materials Chemistry A Pub Date: 2020-04-15 DOI: 10.1039/D0TA02427A
Abstract
A medium-bandgap acceptor IBCT based on an 2-(1-oxo-1,2-dihydro-3H-benzo[b]cyclopenta[d]thiophen-3-ylidene)malononitrile end unit was developed. IBCT has an optical bandgap of 1.65 eV and afforded a power conversion efficiency of 11.26% and an open-circuit voltage of 1.02 V in single-junction organic solar cells when blending with a wide-bandgap copolymer donor L1. The L1:IBCT solar cell was further used as the front cell in tandem solar cells, yielding a 15.25% efficiency. IBCT is among the best medium-bandgap acceptors.
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Journal Name：Journal of Materials Chemistry A
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CAS no.: 89640-58-4
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