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Accelerated degradation of methylammonium lead iodide perovskites induced by exposure to iodine vapour

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  • Shenghao Wang

    (Energy Materials and Surface Sciences Unit (EMSS), Okinawa Institute of Science and Technology Graduate University (OIST)
    † Present address: Institute of Applied Physics, University of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan.)

  • Yan Jiang

    (Energy Materials and Surface Sciences Unit (EMSS), Okinawa Institute of Science and Technology Graduate University (OIST))

  • Emilio J. Juarez-Perez

    (Energy Materials and Surface Sciences Unit (EMSS), Okinawa Institute of Science and Technology Graduate University (OIST))

  • Luis K. Ono

    (Energy Materials and Surface Sciences Unit (EMSS), Okinawa Institute of Science and Technology Graduate University (OIST))

  • Yabing Qi

    (Energy Materials and Surface Sciences Unit (EMSS), Okinawa Institute of Science and Technology Graduate University (OIST))

Abstract

Efficiencies of organic–inorganic lead halide perovskite solar cells (PSCs) have significantly increased in recent years, but instability issues impede their further development and application. Previous studies reported that volatile species (for example, iodine, I2) were generated when perovskites were subjected to moisture, oxygen, light illumination, applied electric field, and thermal stress (all of which are relevant to the operation of PSCs in practical applications). Here we show that I2 vapour causes severe degradation of MAPbI3 (MA: CH3NH3+) perovskite, due to chemical chain reactions. Furthermore, I2 vapour could also induce degradation of other iodide-based perovskites, such as FAPbI3 (FA: HC(NH2)2+) and FA0.8Cs0.2PbI3. The results reveal a universal degradation factor for iodide-based perovskite by I2. As the release of I2 is nearly inevitable during practical applications, this work suggests that MAPbI3 may not be suitable for long-term stable solar cells and it is imperative to develop other types of perovskite material to achieve stable PSCs.

Suggested Citation

  • Shenghao Wang & Yan Jiang & Emilio J. Juarez-Perez & Luis K. Ono & Yabing Qi, 2017. "Accelerated degradation of methylammonium lead iodide perovskites induced by exposure to iodine vapour," Nature Energy, Nature, vol. 2(1), pages 1-8, January.
    • Handle: RePEc:nat:natene:v:2:y:2017:i:1:d:10.1038_nenergy.2016.195
    DOI: 10.1038/nenergy.2016.195
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    Cited by:

    1. 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.
    2. Ke Wang & Benjamin Ecker & Yongli Gao, 2021. "Photoemission Studies on the Environmental Stability of Thermal Evaporated MAPbI 3 Thin Films and MAPbBr 3 Single Crystals," Energies, MDPI, vol. 14(7), pages 1-18, April.

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