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Top and bottom surfaces limit carrier lifetime in lead iodide perovskite films

Author

Listed:
  • Ye Yang

    (Chemistry and Nanoscience Center, National Renewable Energy Laboratory)

  • Mengjin Yang

    (Chemistry and Nanoscience Center, National Renewable Energy Laboratory)

  • David T. Moore

    (Chemistry and Nanoscience Center, National Renewable Energy Laboratory)

  • Yong Yan

    (Chemistry and Nanoscience Center, National Renewable Energy Laboratory
    New Jersey Institute of Technology)

  • Elisa M. Miller

    (Chemistry and Nanoscience Center, National Renewable Energy Laboratory)

  • Kai Zhu

    (Chemistry and Nanoscience Center, National Renewable Energy Laboratory)

  • Matthew C. Beard

    (Chemistry and Nanoscience Center, National Renewable Energy Laboratory)

Abstract

Carrier recombination at defects is detrimental to the performance of solar energy conversion systems, including solar cells and photoelectrochemical devices. Point defects are localized within the bulk crystal while extended defects occur at surfaces and grain boundaries. If not properly managed, surfaces can be a large source of carrier recombination. Separating surface carrier dynamics from bulk and/or grain-boundary recombination in thin films is challenging. Here, we employ transient reflection spectroscopy to measure the surface carrier dynamics in methylammonium lead iodide perovskite polycrystalline films. We find that surface recombination limits the total carrier lifetime in perovskite polycrystalline thin films, meaning that recombination inside grains and/or at grain boundaries is less important than top and bottom surface recombination. The surface recombination velocity in polycrystalline films is nearly an order of magnitude smaller than that in single crystals, possibly due to unintended surface passivation of the films during synthesis.

Suggested Citation

  • Ye Yang & Mengjin Yang & David T. Moore & Yong Yan & Elisa M. Miller & Kai Zhu & Matthew C. Beard, 2017. "Top and bottom surfaces limit carrier lifetime in lead iodide perovskite films," Nature Energy, Nature, vol. 2(2), pages 1-7, February.
    • Handle: RePEc:nat:natene:v:2:y:2017:i:2:d:10.1038_nenergy.2016.207
    DOI: 10.1038/nenergy.2016.207
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    Cited by:

    1. Yurou Zhang & Miaoqiang Lyu & Tengfei Qiu & Ekyu Han & Il Ku Kim & Min-Cherl Jung & Yun Hau Ng & Jung-Ho Yun & Lianzhou Wang, 2020. "Halide Perovskite Single Crystals: Optoelectronic Applications and Strategical Approaches," Energies, MDPI, vol. 13(16), pages 1-27, August.
    2. Stefania Cacovich & Guillaume Vidon & Matteo Degani & Marie Legrand & Laxman Gouda & Jean-Baptiste Puel & Yana Vaynzof & Jean-François Guillemoles & Daniel Ory & Giulia Grancini, 2022. "Imaging and quantifying non-radiative losses at 23% efficient inverted perovskite solar cells interfaces," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    3. Yu Pu & Haijun Su & Congcong Liu & Min Guo & Lin Liu & Hengzhi Fu, 2023. "A Review on Buried Interface of Perovskite Solar Cells," Energies, MDPI, vol. 16(13), pages 1-30, June.
    4. Nour El Islam Boukortt & Claudia Triolo & Saveria Santangelo & Salvatore Patanè, 2023. "All-Perovskite Tandem Solar Cells: From Certified 25% and Beyond," Energies, MDPI, vol. 16(8), pages 1-24, April.

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