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Advanced Materials

Thiophene–Thiazolothiazole Copolymers: Significant Impact of Side Chain Composition on Backbone Orientation and Solar Cell Performances

Authors

  • Itaru Osaka,

    Corresponding author
    1. Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
    2. Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency, Chiyoda-ku, Japan
    3. Emergent Molecular Function Research Group, RIKEN Center for Emergent Matter Science (CEMS) Wako, Saitama, Japan
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  • Masahiko Saito,

    1. Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
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  • Tomoyuki Koganezawa,

    1. Japan Synchrotron Radiation Research Institute, Hyogo, Japan
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  • Kazuo Takimiya

    1. Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
    2. Emergent Molecular Function Research Group, RIKEN Center for Emergent Matter Science (CEMS) Wako, Saitama, Japan
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Abstract

The backbone orientation in the thiophene–thiazolothiazole (TzTz) copolymer system can be altered by tuning of the alky side chain composition. We highlight that the orientation significantly impact their solar cell efficiency in particular when using thicker active layers.

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