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Intramolecular Donor–Acceptor Regioregular Poly(hexylphenanthrenyl-imidazole thiophene) Exhibits Enhanced Hole Mobility for Heterojunction Solar Cell Applications

Authors

  • Yao-Te Chang,

    1. Department of Materials Science and Engineering National Chiao Tung University 1001 Ta Hsueh Road Hsinchu, 30049 Taiwan (R.O.C.)
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  • So-Lin Hsu,

    1. Department of Materials Science and Engineering National Chiao Tung University 1001 Ta Hsueh Road Hsinchu, 30049 Taiwan (R.O.C.)
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  • Ming-Hsin Su,

    1. Department of Materials Science and Engineering National Chiao Tung University 1001 Ta Hsueh Road Hsinchu, 30049 Taiwan (R.O.C.)
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  • Kung-Hwa Wei

    Corresponding author
    1. Department of Materials Science and Engineering National Chiao Tung University 1001 Ta Hsueh Road Hsinchu, 30049 Taiwan (R.O.C.)
    • Department of Materials Science and Engineering National Chiao Tung University 1001 Ta Hsueh Road Hsinchu, 30049 Taiwan (R.O.C.).
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Abstract

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PHPIT, a new kind of intramolecular donor–acceptor side-chain-tethered hexylphenanthrenyl-imidazole polythiophene is synthesized. The more-balanced electron and hole mobilities and the enhanced visible- and internal-light absorptions in the devices consisting of annealed PHPIT/PCBM blends both contribute to a much higher short-circuit current density, which in turn led to a power conversion efficiency as high as 4.1%.

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