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Advanced Materials

PDT-S-T: A New Polymer with Optimized Molecular Conformation for Controlled Aggregation and ππ Stacking and Its Application in Efficient Photovoltaic Devices

Authors

  • Yue Wu,

    1. State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
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  • Zhaojun Li,

    1. State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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  • Wei Ma,

    Corresponding author
    1. Department of Physics, North Carolina State University Raleigh, NC 27695, USA
    • Department of Physics, North Carolina State University Raleigh, NC 27695, USA.
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  • Ye Huang,

    1. State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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  • Lijun Huo,

    Corresponding author
    1. State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    • State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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  • Xia Guo,

    1. State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
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  • Maojie Zhang,

    1. State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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  • Harald Ade,

    1. Department of Physics, North Carolina State University Raleigh, NC 27695, USA
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  • Jianhui Hou

    Corresponding author
    1. State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    • State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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Abstract

The correlation among molecular conformation, the crystallinity of the morphology, propensity for ππ stacking, J- versus H-aggregation, and photovoltaic performance have been studied based on two newly designed polymers, PBDTTT-S-T and PDT-S-T. The results show that more linear backbone structure is helpful to improve photovoltaic properties of the polymer, and therefore, molecular conformation should be considered for molecular design of photovoltaic polymers.

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