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Aerosol OT/Water System Coupled with Triiodide/Iodide (I3/I) Redox Electrolytes for Highly Efficient Dye-Sensitized Solar Cells

Authors

  • Eui-Hyun Kong,

    1. Department of Materials Science and Engineering, and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
    Current affiliation:
    1. These authors contributed equally to this work.
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  • Jongchul Lim,

    1. Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
    Current affiliation:
    1. These authors contributed equally to this work.
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  • Yong-June Chang,

    1. Department of Materials Science and Engineering, and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
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  • Yeon-Hee Yoon,

    1. Department of Materials Science and Engineering, and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
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  • Taiho Park,

    Corresponding author
    1. Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
    • Taiho Park, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea.

      Hyun Myung Jang, Department of Materials Science and Engineering, and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea

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  • Hyun Myung Jang

    Corresponding author
    1. Department of Materials Science and Engineering, and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
    • Taiho Park, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea.

      Hyun Myung Jang, Department of Materials Science and Engineering, and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea

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Abstract

Dye-sensitized solar cells (DSCs) are considered to be a promising alternative to Si-based photovoltaic cells. The electrolyte of the DSC primarily uses triiodide/iodide (I3/I) as a redox couple. Therefore, it is essential to understand the regeneration and recombination kinetics of the I3/I redox couples in the device. In this context, controlling the total and local concentrations of the I3/I redox couples is an important parameter that can influence the DSC performance. Here, we propose that the introduction of a sodium bis (2-ethylhexyl) sulfosuccinate (AOT)/water system to the I3/I electrolyte enables the control of the concentration of the redox couples, which consequently achieves a high power conversion efficiency of ∼11% for ∼1000 h (under 1 sun illumination) owing to the enhanced dye-regeneration efficiency and the reduced recombination rate. This novel concept assists in the comprehension of the regeneration and recombination kinetics and develops highly efficient DSCs.

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