A Thieno[3,4-<i>b</i>]thiophene-Based Non-fullerene Electron Acceptor for High-Performance Bulk-Heterojunction Organic Solar Cells
Feng Liu(Chinese Academy of Sciences), Zichun Zhou(Beijing National Laboratory for Molecular Sciences), Cheng Zhang(University of Chinese Academy of Sciences), Thomas Vergote(Beijing National Laboratory for Molecular Sciences), Haijun Fan(Chinese Academy of Sciences), Feng Liu(University of Chinese Academy of Sciences), Xiaozhang Zhu(Beijing National Laboratory for Molecular Sciences)
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Abstract
A thieno[3,4-b]thiophene-based electron acceptor, ATT-1, is designed and synthesized. ATT-1 exhibits a planar conjugated framework, broad absorption with a large absorption coefficient, and a slightly high LUMO energy level. Bulk-heterojunction (BHJ) solar cells based on PTB7-Th electron donor and ATT-1 electron acceptor delivered power conversion efficiencies of up to 10.07%, which is among the best performances reported for non-fullerene BHJ solar cells using PTB7-Th as the electron donor.
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