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Low-bandgap mixed tin–lead iodide perovskites with reduced methylammonium for simultaneous enhancement of solar cell efficiency and stability

Author

Listed:
  • Chongwen Li

    (The University of Toledo)

  • Zhaoning Song

    (The University of Toledo)

  • Cong Chen

    (The University of Toledo)

  • Chuanxiao Xiao

    (Materials Science Center, National Renewable Energy Laboratory)

  • Biwas Subedi

    (The University of Toledo)

  • Steven P. Harvey

    (Materials Science Center, National Renewable Energy Laboratory)

  • Niraj Shrestha

    (The University of Toledo)

  • Kamala Khanal Subedi

    (The University of Toledo)

  • Lei Chen

    (The University of Toledo)

  • Dachang Liu

    (The University of Toledo)

  • You Li

    (The University of Toledo)

  • Yong-Wah Kim

    (The University of Toledo)

  • Chun-sheng Jiang

    (Materials Science Center, National Renewable Energy Laboratory)

  • Michael J. Heben

    (The University of Toledo)

  • Dewei Zhao

    (The University of Toledo)

  • Randy J. Ellingson

    (The University of Toledo)

  • Nikolas J. Podraza

    (The University of Toledo)

  • Mowafak Al-Jassim

    (Materials Science Center, National Renewable Energy Laboratory)

  • Yanfa Yan

    (The University of Toledo)

Abstract

High-performance perovskite/perovskite tandem solar cells require high-efficiency and stable low-bandgap perovskite subcells. State-of-the-art low-bandgap mixed tin–lead iodide perovskite solar cells exhibit either a high power-conversion efficiency or improved stability, but not both. Here we report a two-step bilayer interdiffusion growth process to simultaneously meet both requirements for formamidinium-based low-bandgap mixed tin–lead iodide perovskite solar cells. The bilayer interdiffusion growth process allows for the formation of high-quality and large-grained perovskite films with only 10 mol% volatile methylammonium. Additionally, one-dimensional pyrrolidinium perovskite was applied to passivate the perovskite film and improve the junction quality, which resulted in a carrier lifetime of 1.1 μs and an open circuit voltage of 0.865 V for our perovskite film and device with a bandgap of 1.28 eV. Our strategies enabled a power-conversion efficiency of 20.4% for low-bandgap perovskite solar cells under AM 1.5G illumination. More importantly, an encapsulated device can retain 92% of its initial efficiency after 450 h of continuous 1 sun illumination.

Suggested Citation

  • Chongwen Li & Zhaoning Song & Cong Chen & Chuanxiao Xiao & Biwas Subedi & Steven P. Harvey & Niraj Shrestha & Kamala Khanal Subedi & Lei Chen & Dachang Liu & You Li & Yong-Wah Kim & Chun-sheng Jiang &, 2020. "Low-bandgap mixed tin–lead iodide perovskites with reduced methylammonium for simultaneous enhancement of solar cell efficiency and stability," Nature Energy, Nature, vol. 5(10), pages 768-776, October.
    • Handle: RePEc:nat:natene:v:5:y:2020:i:10:d:10.1038_s41560-020-00692-7
    DOI: 10.1038/s41560-020-00692-7
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    Citations

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    Cited by:

    1. Bahram Abdollahi Nejand & David B. Ritzer & Hang Hu & Fabian Schackmar & Somayeh Moghadamzadeh & Thomas Feeney & Roja Singh & Felix Laufer & Raphael Schmager & Raheleh Azmi & Milian Kaiser & Tobias Ab, 2022. "Scalable two-terminal all-perovskite tandem solar modules with a 19.1% efficiency," Nature Energy, Nature, vol. 7(7), pages 620-630, July.
    2. Dhruba B. Khadka & Yasuhiro Shirai & Masatoshi Yanagida & Hitoshi Ota & Andrey Lyalin & Tetsuya Taketsugu & Kenjiro Miyano, 2024. "Defect passivation in methylammonium/bromine free inverted perovskite solar cells using charge-modulated molecular bonding," Nature Communications, Nature, vol. 15(1), pages 1-16, December.

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