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Water- and heat-activated dynamic passivation for perovskite photovoltaics

Author

Listed:
  • Wei-Ting Wang

    (City University of Hong Kong)

  • Philippe Holzhey

    (University of Oxford
    Monash University)

  • Ning Zhou

    (City University of Hong Kong)

  • Qiang Zhang

    (Xi’an Jiaotong University)

  • Suer Zhou

    (University of Oxford)

  • Elisabeth A. Duijnstee

    (University of Oxford)

  • Kevin J. Rietwyk

    (Monash University)

  • Jeng-Yu Lin

    (Tunghai University)

  • Yijie Mu

    (City University of Hong Kong
    The University of Hong Kong)

  • Yanfeng Zhang

    (Xi’an Jiaotong University)

  • Udo Bach

    (Monash University)

  • Chun-Guey Wu

    (National Central University)

  • Hin‐Lap Yip

    (City University of Hong Kong
    City University of Hong Kong
    City University of Hong Kong
    City University of Hong Kong)

  • Henry J. Snaith

    (University of Oxford)

  • Shien-Ping Feng

    (City University of Hong Kong
    City University of Hong Kong)

Abstract

Further improvements in perovskite solar cells require better control of ionic defects in the perovskite photoactive layer during the manufacturing stage and their usage1–5. Here we report a living passivation strategy using a hindered urea/thiocarbamate bond6–8 Lewis acid–base material (HUBLA), where dynamic covalent bonds with water and heat-activated characteristics can dynamically heal the perovskite to ensure device performance and stability. Upon exposure to moisture or heat, HUBLA generates new agents and further passivates defects in the perovskite. This passivation strategy achieved high-performance devices with a power conversion efficiency (PCE) of 25.1 per cent. HUBLA devices retained 94 per cent of their initial PCE for approximately 1,500 hours of ageing at 85 degrees Celsius in nitrogen and maintained 88 per cent of their initial PCE after 1,000 hours of ageing at 85 degrees Celsius and 30 per cent relative humidity in air.

Suggested Citation

  • Wei-Ting Wang & Philippe Holzhey & Ning Zhou & Qiang Zhang & Suer Zhou & Elisabeth A. Duijnstee & Kevin J. Rietwyk & Jeng-Yu Lin & Yijie Mu & Yanfeng Zhang & Udo Bach & Chun-Guey Wu & Hin‐Lap Yip & He, 2024. "Water- and heat-activated dynamic passivation for perovskite photovoltaics," Nature, Nature, vol. 632(8024), pages 294-300, August.
    • Handle: RePEc:nat:nature:v:632:y:2024:i:8024:d:10.1038_s41586-024-07705-5
    DOI: 10.1038/s41586-024-07705-5
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