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Single junction CsPbBr3 solar cell coupled with electrolyzer for solar water splitting

Author

Listed:
  • Jin Hyun Kim

    (Ecole Polytechnique Fédérale de Lausanne (EPFL))

  • Jongdeuk Seo

    (Ulsan National Institute of Science & Technology (UNIST))

  • Dongjun Lim

    (Ulsan National Institute of Science & Technology (UNIST))

  • Jaehwi Lee

    (Ulsan National Institute of Science & Technology (UNIST))

  • Jinhee Kim

    (Ulsan National Institute of Science & Technology (UNIST))

  • Jin Uk Lee

    (Ulsan National Institute of Science & Technology (UNIST))

  • Jong Ah Moon

    (Ulsan National Institute of Science & Technology (UNIST))

  • Jaeki Jeong

    (Ecole Polytechnique Fédérale de Lausanne (EPFL)
    Sungkyunkwan University)

  • Shaik Mohammed Zakeeruddin

    (Ecole Polytechnique Fédérale de Lausanne (EPFL))

  • Heunjeong Lee

    (University of Ulsan)

  • Shinuk Cho

    (University of Ulsan)

  • Michael Graetzel

    (Ecole Polytechnique Fédérale de Lausanne (EPFL))

  • Hankwon Lim

    (Ulsan National Institute of Science & Technology (UNIST)
    Ulsan National Institute of Science and Technology (UNIST)
    Ulsan National Institute of Science & Technology (UNIST))

  • Jae Sung Lee

    (Ulsan National Institute of Science & Technology (UNIST))

  • Jin Young Kim

    (Ulsan National Institute of Science & Technology (UNIST)
    Ulsan National Institute of Science & Technology (UNIST))

Abstract

Artificial photosynthesis system to realize Solar overall water splitting has been regarded as sustainable and renewable solution for energy and environmental issues. While artificial photosynthesis system (efficiency of 12.4%) greatly exceeds efficiency of natural photosynthesis, yet such high efficiency needs multiple, 2 or more light absorbers to achieve, total photovoltage above 1440 mV. In this report, we demonstrate visible light active Single light absorber –2 photons to 1 hydrogen (S2) overall water splitting via photovoltaic–electrochemical system that can be achieved by single junction solar cell, composed with CsPbBr3 (band gap of 2.3 eV) solar cell with open circuit voltage larger than 1600 mV can power up water electrolyzer cell and achieves Solar to hydrogen efficiency of 1.7% with confirmed H2 gas generation. Operating point shows possible STH of 5.0%. This result demonstrates its prospective on efficiency increment (max 12%) and Technoeconomic analysis (modest cost of 5.5 $/kg of hydrogen) in near future, as benchmark for S2 PV-EC system.

Suggested Citation

  • Jin Hyun Kim & Jongdeuk Seo & Dongjun Lim & Jaehwi Lee & Jinhee Kim & Jin Uk Lee & Jong Ah Moon & Jaeki Jeong & Shaik Mohammed Zakeeruddin & Heunjeong Lee & Shinuk Cho & Michael Graetzel & Hankwon Lim, 2025. "Single junction CsPbBr3 solar cell coupled with electrolyzer for solar water splitting," Nature Communications, Nature, vol. 16(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-58980-3
    DOI: 10.1038/s41467-025-58980-3
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    References listed on IDEAS

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