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Issue 18, 2019
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Electron-beam irradiation-hard metal-halide perovskite nanocrystals

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Recently, regardless of numerous works reporting on the instability of metal-halide perovskites against humidity/oxygen/heat, another intrinsic weakness under high-energy electron-beam (e-beam) irradiation has emerged. Here, e-beam irradiation-hard perovskite nanocrystals (NCs) are reported, which are based on a doping strategy. The lifetime of Mn2+-doped perovskite NCs under e-beam irradiation at a high acceleration voltage of 200 keV is 10-fold prolonged, in comparison to that of their undoped counterpart. It is discovered that the stronger Mn–Cl and Pb–Cl bonds triggered by Mn2+ doping provide an enhanced chemical stability to the perovskite NCs. Furthermore, the enlarged tolerance factor of the NCs with Mn2+ dopants improves the phase stability of the perovskites. Consequently, both enhanced chemical and phase stabilities offer a more negative formation energy for perovskite NCs with fundamentally increased stability under e-beam irradiation. The present work offers a new route towards irradiation-hard perovskite nanomaterials.

Graphical abstract: Electron-beam irradiation-hard metal-halide perovskite nanocrystals

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The article was received on 19 Feb 2019, accepted on 02 Apr 2019 and first published on 04 Apr 2019

Article type: Communication
DOI: 10.1039/C9TA01898K
J. Mater. Chem. A, 2019,7, 10912-10917

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    Electron-beam irradiation-hard metal-halide perovskite nanocrystals

    W. Liu, J. Zheng, M. Shang, Z. Fang, K. Chou, W. Yang, X. Hou and T. Wu, J. Mater. Chem. A, 2019, 7, 10912
    DOI: 10.1039/C9TA01898K

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