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A Depletion-Free, Ionic, Self-Assembled Recombination Layer for Tandem Polymer Solar Cells

Authors

  • Jinho Lee,

    1. Department of Nanobio Materials and Electronics, School of Materials Science and Engineering, Heeger Center for Advanced Materials (HCAM), Research Institute for Solar and Sustainable Energies (RISE), Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
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  • Hongkyu Kang,

    1. Department of Nanobio Materials and Electronics, School of Materials Science and Engineering, Heeger Center for Advanced Materials (HCAM), Research Institute for Solar and Sustainable Energies (RISE), Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
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  • Jaemin Kong,

    1. Department of Nanobio Materials and Electronics, School of Materials Science and Engineering, Heeger Center for Advanced Materials (HCAM), Research Institute for Solar and Sustainable Energies (RISE), Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
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  • Kwanghee Lee

    Corresponding author
    1. Department of Nanobio Materials and Electronics, School of Materials Science and Engineering, Heeger Center for Advanced Materials (HCAM), Research Institute for Solar and Sustainable Energies (RISE), Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
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Abstract

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An innovative method for achieving depletion-free recombination layers (RLs) in inverted tandem polymer solar cells is demonstrated using ionic self-assembly of a cationic non-conjugated polyelectrolyte and an anionic metallic polymer. These RLs form tunnel junctions with different work functions of 5.1 eV and 3.9 eV on each of their surfaces. The tandem solar cells containing these RLs exhibit solar power conversion efficiencies exceeding 8.3%.

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