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  • Functionalization of perovskite thin films with moisture-tolerant molecules

    Author(s)
    Yang, Shuang
    Wang, Yun
    Liu, Porun
    Cheng, Yi-Bing
    Zhao, Hui Jun
    Yang, Hua Gui
    Griffith University Author(s)
    Zhao, Huijun
    Liu, Porun
    Wang, Yun
    Year published
    2016
    Metadata
    Show full item record
    Abstract
    Organic–inorganic hybrid perovskites are particularly suited as light-harvesting materials in photovoltaic devices. The power conversion efficiency of perovskite solar cells has reached certified values of over 20% in just a few years. However, one of the major hindrances for application of these materials in real-world devices is the performance degradation in humid conditions, leading to a rapid loss of photovoltaic response. Here, we demonstrate that hydrophobic tertiary and quaternary alkyl ammonium cations can be successfully assembled on the perovskite surface as efficient water-resisting layers via a facile surface ...
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    Organic–inorganic hybrid perovskites are particularly suited as light-harvesting materials in photovoltaic devices. The power conversion efficiency of perovskite solar cells has reached certified values of over 20% in just a few years. However, one of the major hindrances for application of these materials in real-world devices is the performance degradation in humid conditions, leading to a rapid loss of photovoltaic response. Here, we demonstrate that hydrophobic tertiary and quaternary alkyl ammonium cations can be successfully assembled on the perovskite surface as efficient water-resisting layers via a facile surface functionalization technique. Such layers can protect the perovskite film under high relative humidity (90 ± 5%) over 30 days. More importantly, devices based on such films can retain the photovoltaic capacities of bulk perovskites, with power conversion efficiencies over 15%. Improving the humidity tolerance of perovskite materials is a necessary step towards large-scale production of high-performance perovskite-based devices under ambient humidity.
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    Journal Title
    Nature Energy
    Volume
    1
    DOI
    https://doi.org/10.1038/nenergy.2015.16
    Subject
    Physical properties of materials
    Environmental engineering
    Functional materials
    Nanomaterials
    Electrical engineering
    Mechanical engineering
    Publication URI
    http://hdl.handle.net/10072/142200
    Collection
    • Journal articles

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