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Advanced Materials

High-Efficiency Organic Solar Cells Based on End-Functional-Group-Modified Poly(3-hexylthiophene)

Authors

  • Jong Soo Kim,

    1. School of Environmental Science and Engineering Polymer Research Institute Pohang University of Science and Engineering Pohang, 790-784 (Korea)
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  • Youngmin Lee,

    1. Department of Chemical Engineering Polymer Research Institute Pohang University of Science and Engineering Pohang, 790-784 (Korea)
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  • Ji Hwang Lee,

    1. School of Environmental Science and Engineering Polymer Research Institute Pohang University of Science and Engineering Pohang, 790-784 (Korea)
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  • Jong Hwan Park,

    1. Department of Chemical Engineering Polymer Research Institute Pohang University of Science and Engineering Pohang, 790-784 (Korea)
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  • Jin Kon Kim,

    Corresponding author
    1. Department of Chemical Engineering Polymer Research Institute Pohang University of Science and Engineering Pohang, 790-784 (Korea)
    • Department of Chemical Engineering Polymer Research Institute Pohang University of Science and Engineering Pohang, 790-784 (Korea).
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  • Kilwon Cho

    Corresponding author
    1. Department of Chemical Engineering Polymer Research Institute Pohang University of Science and Engineering Pohang, 790-784 (Korea)
    • Department of Chemical Engineering Polymer Research Institute Pohang University of Science and Engineering Pohang, 790-784 (Korea).
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Abstract

Photovoltaic devices of end-functional-group-modified poly 3-(hexylthiophene)/[6,6]-phenyl-C61 butyric acid methyl ester (P3HT:PCBM; see figure) are fabricated with thermal annealing. The surface energies between donor and acceptor were matched by varying the end group, which can be used to control vertical and horizontal phase separation in the active layer, leading mixed nanomorphology with optimized phase separation, low series resistance, and high performance for solar cell devices.

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