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Effect of Interfacial Engineering in Solid-State Nanostructured Sb2S3 Heterojunction Solar Cells

Authors

  • Takafumi Fukumoto,

    1. Nissan Research Center, Nissan Motor Co., Ltd, Natsushima-cho, 1, Yokosuka, Kanagawa 237-8523, Japan
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  • Thomas Moehl,

    1. Department of Sciences and Chemical Engineering, École Polytechnique Fédérale de Lausanne- EPFL, Lausanne, Switzerland
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  • Yusuke Niwa,

    1. Nissan Research Center, Nissan Motor Co., Ltd, Natsushima-cho, 1, Yokosuka, Kanagawa 237-8523, Japan
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  • Md. K. Nazeeruddin,

    1. Department of Sciences and Chemical Engineering, École Polytechnique Fédérale de Lausanne- EPFL, Lausanne, Switzerland
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  • Michael Grätzel,

    1. Department of Sciences and Chemical Engineering, École Polytechnique Fédérale de Lausanne- EPFL, Lausanne, Switzerland
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  • Lioz Etgar

    Corresponding author
    1. Department of Sciences and Chemical Engineering, École Polytechnique Fédérale de Lausanne- EPFL, Lausanne, Switzerland
    2. Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
    • Department of Sciences and Chemical Engineering, École Polytechnique Fédérale de Lausanne- EPFL, Lausanne, Switzerland.
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Abstract

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Surface treatment by decyl-phosphonic acid (DPA) reduces the recombination and increases the open circuit voltage and the fill factor of the inorganic–organic Sb2S3 hetrojunction solar cell. It is revealed that the DPA attaches to both surfaces, the uncovered TiO2 surface and the Sb2S3 surface. This cell produces a power conversion efficiency of 3.9% under 1 sun intensity.

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