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Effect of Core Size on Performance of Fused-Ring Electron Acceptors

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Download Hi-Res ImageDownload to MS-PowerPointCite This:Chem. Mater. 2018, 30, 15, 5390-5396
    Article

    Effect of Core Size on Performance of Fused-Ring Electron Acceptors
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    • Shuixing Dai
      Shuixing Dai
      Department of Materials Science and Engineering, College of Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China
      More by Shuixing Dai
    • Yiqun Xiao
      Yiqun Xiao
      Department of Physics, The Chinese University of Hong Kong, New Territories, Hong Kong, China
      More by Yiqun Xiao
    • Peiyao Xue
      Peiyao Xue
      Department of Materials Science and Engineering, College of Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China
      More by Peiyao Xue
    • Jeromy James Rech
      Jeromy James Rech
      Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
      More by Jeromy James Rech
    • Kuan Liu
      Kuan Liu
      Department of Materials Science and Engineering, College of Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China
      More by Kuan Liu
    • Zeyuan Li
      Zeyuan Li
      Department of Materials Science and Engineering, College of Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China
      More by Zeyuan Li
    • Xinhui Lu
      Xinhui Lu
      Department of Physics, The Chinese University of Hong Kong, New Territories, Hong Kong, China
      More by Xinhui Lu
    • Wei You
      Wei You
      Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
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    • Xiaowei Zhan*
      Xiaowei Zhan
      Department of Materials Science and Engineering, College of Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China
      *E-mail: [email protected]
      More by Xiaowei Zhan
      Orcidhttp://orcid.org/0000-0002-1006-3342
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    Chemistry of Materials

    Cite this: Chem. Mater. 2018, 30, 15, 5390–5396
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    https://doi.org/10.1021/acs.chemmater.8b02222
    Published July 2, 2018
    Copyright © 2018 American Chemical Society
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    Abstract

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    We report 4 fused-ring electron acceptors (FREAs) with the same end-groups and side-chains but different cores, whose sizes range from 5 to 11 fused rings. The core size has considerable effects on the electronic, optical, charge transport, morphological, and photovoltaic properties of the FREAs. Extending the core size leads to red-shift of absorption spectra, upshift of the energy levels, and enhancement of molecular packing and electron mobility. From 5 to 9 fused rings, the core size extension can simultaneously enhance open-circuit voltage (VOC), short-circuit current density (JSC), and fill factor (FF) of organic solar cells (OSCs). The best efficiency of the binary-blend devices increases from 5.6 to 11.7%, while the best efficiency of the ternary-blend devices increases from 6.3 to 12.6% as the acceptor core size extends.

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    The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acs.chemmater.8b02222.

    • Materials synthesis and characterization; TGA and DSC curves, SCLC, AFM images, GIWAXS, and GISAXS data; device fabrication, optimization, and characterization (PDF)

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    Cited By

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    This article is cited by 101 publications.

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    Cite this: Chem. Mater. 2018, 30, 15, 5390–5396
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