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Advanced Materials

Highly Crystalline and Low Bandgap Donor Polymers for Efficient Polymer Solar Cells

Authors

  • Jun Liu,

    1. Department of Macromolecular Science and Engineering, Case School of Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA
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  • Hyosung Choi,

    1. Interdisciplinary School of Green Energy, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Republic of Korea
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  • Jin Young Kim,

    1. Interdisciplinary School of Green Energy, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Republic of Korea
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  • Chris Bailey,

    1. Materials and Manufacturing Directorate, Air Force Research Laboratory, RXBP, Wright-Patterson Air Force Base, OH 45433, USA
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  • Michael Durstock,

    1. Materials and Manufacturing Directorate, Air Force Research Laboratory, RXBP, Wright-Patterson Air Force Base, OH 45433, USA
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  • Liming Dai

    Corresponding author
    1. Department of Macromolecular Science and Engineering, Case School of Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA
    • Department of Macromolecular Science and Engineering, Case School of Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA.

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Abstract

A highly crystalline and low bandgap donor polymer, EI-PFDTBT, is developed by inserting ethylene bridging units to ensure a coplanar configuration between the side chains and the main chain. Polymer solar cells based on the EI-PFDTBT and PC71BM blends spincoated at elevated temperatures exhibit a power conversion efficiency of 5.1%.

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