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Attempted Inversion of Semiconducting Features of Platinum Polyyne Polymers: A New Approach for All-Polymer Solar Cells

Authors

  • Yuping Yuan,

    1. Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan
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  • Tsuyoshi Michinobu,

    Corresponding author
    1. Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan
    2. Global Edge Institute, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
    • Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan.
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  • Jun Oguma,

    1. Tsukuba Research Laboratory, Sumitomo Chemical Co., Ltd., 6 Kitahara, Tsukuba 300-3294, Japan
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  • Takehito Kato,

    1. Tsukuba Research Laboratory, Sumitomo Chemical Co., Ltd., 6 Kitahara, Tsukuba 300-3294, Japan
    Current affiliation:
    1. Department of Mechanical Engineering, Oyama National College of Technology, Japan
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  • Kunihito Miyake

    1. Tsukuba Research Laboratory, Sumitomo Chemical Co., Ltd., 6 Kitahara, Tsukuba 300-3294, Japan
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Abstract

Platinum(II) polyyne polymers containing thiophene-acceptor-thiophene units are synthesized, and their main chain alkynes are functionalized by the formal cycloaddition–retro-electrocyclization reaction with tetracyanoethylene (TCNE). The polymer energy levels are significantly decreased by the TCNE addition. Bulk-heterojunction solar cells are fabricated using the TCNE-adducted platinum(II) polyyne polymers. The use of these polymers as p-type semiconductors in combination with n-type fullerene derivatives indicates that the p-type semiconducting ability decreases by approximately five to ten times after the TCNE addition. On the contrary, when the TCNE-adducted polymers are employed as a substitute for the fullerene derivatives, the all-polymer solar cells are initially fabricated.

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