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The Combination of S⋯N and S⋯Cl Noncovalently Conformational Locks for Constructing High-Planarity and Low-Cost Non-fused-Ring Electron Acceptors
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  • Ziyang Han,
  • Congqi Li,
  • Xiaobin Gu,
  • Xiao Han,
  • Sixuan Wang,
  • Yanan Wei,
  • Jinhua Gao,
  • Zhixiang Wei,
  • Yunhao Cai,
  • Xin Zhang,
  • Hui Huang
Ziyang Han
University of the Chinese Academy of Sciences
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Congqi Li
University of the Chinese Academy of Sciences
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Xiaobin Gu
University of the Chinese Academy of Sciences
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Xiao Han
University of the Chinese Academy of Sciences
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Sixuan Wang
University of the Chinese Academy of Sciences
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Yanan Wei
University of the Chinese Academy of Sciences
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Jinhua Gao
University of the Chinese Academy of Sciences
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Zhixiang Wei
National Center for Nanoscience and Technology
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Yunhao Cai
University of the Chinese Academy of Sciences
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Xin Zhang
University of the Chinese Academy of Sciences

Corresponding Author:[email protected]

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Hui Huang
University of the Chinese Academy of Sciences
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Abstract

By employing thiazole and 4-chlorothiazole as the A′ units, two A-D-A′-D-A type nonfused-ring electron acceptors (NFREAs) Tz-H and Tz-Cl were designed and synthesized. Replacing thiazole in Tz-H with 4-chlorothiazole can not only remarkably shorten the synthetic route through C-H direct arylation but also enhance molecular planarity with the simultaneous incorporation of S···N and S···Cl non-covalently conformational locks (NoCLs). The photovoltaic devices based on PM6:Tz-Cl exhibited a power conversion efficiency as high as 11.10%, much higher than that of PM6:Tz-H (6.41%), mainly due to more efficient exciton dissociation, better and more balanced carrier mobility, less charge recombination, and more favorable morphology. These findings demonstrate the great potential of NoCLs in achieving low-cost and high-performance NFREAs.
19 Feb 20231st Revision Received
20 Feb 2023Submission Checks Completed
20 Feb 2023Assigned to Editor
20 Feb 2023Review(s) Completed, Editorial Evaluation Pending
20 Feb 2023Reviewer(s) Assigned
02 Mar 2023Editorial Decision: Accept