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Dimensional reduction in Cs2AgBiBr6 enables long-term stable Perovskite-based gas sensing

Author

Listed:
  • Wen Ye

    (Soochow University
    Suzhou University of Science and Technology)

  • Hong-Zhen Lin

    (Chinese Academy of Sciences)

  • Menglong Li

    (Soochow University)

  • Lihua Jiang

    (Soochow University)

  • Dongyun Chen

    (Soochow University)

  • Jian-Mei Lu

    (Soochow University)

Abstract

Halide perovskite gas sensors have a low gas detection limit at room temperature, surpassing the performance of traditional metal oxide chemiresistors. However, they are prone to structural decomposition and performance loss due to the lack of coordination unsaturated surface metal ions and sensitivity to environmental factors such as water, oxygen, heat, and light. To address this issue, we present a general strategy: replacing the cation Cs+ in inorganic perovskite Cs2AgBiBr6 with long-chain alkylamines. This modification synthesizes perovskite sensor materials that effectively block moisture and exhibit excellent stability under real-working conditions. The chemiresistors show high sensitivity and stability to CO gas, with (BA)4AgBiBr8 detecting CO at a limit of 20 ppb, maintaining performance after 270 days of continuous exposure to ambient air. The exceptional performance of (BA)4AgBiBr8 is elucidated through density functional theory calculations combined with sum frequency generation spectroscopy, marking a significant breakthrough in halide perovskite-based gas sensing by surpassing the stability and sensitivity of traditional sensors.

Suggested Citation

  • Wen Ye & Hong-Zhen Lin & Menglong Li & Lihua Jiang & Dongyun Chen & Jian-Mei Lu, 2025. "Dimensional reduction in Cs2AgBiBr6 enables long-term stable Perovskite-based gas sensing," Nature Communications, Nature, vol. 16(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-60206-5
    DOI: 10.1038/s41467-025-60206-5
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    References listed on IDEAS

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    1. Ashish Modi & Nikhil Koratkar & Eric Lass & Bingqing Wei & Pulickel M. Ajayan, 2003. "Miniaturized gas ionization sensors using carbon nanotubes," Nature, Nature, vol. 424(6945), pages 171-174, July.
    2. Wen Ye & Liangdan Zhao & Hong-Zhen Lin & Lifeng Ding & Qiang Cao & Ze-Kun Chen & Jia Wang & Qi-Meng Sun & Jing-Hui He & Jian-Mei Lu, 2023. "Halide Perovskite glues activate two-dimensional covalent organic framework crystallites for selective NO2 sensing," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
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