Electron-beam irradiation-hard metal-halide perovskite nanocrystals

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 a...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2019, Vol.7 (18), p.10912-10917
Main Authors: Liu, Wenna, Zheng, Jinju, Shang, Minghui, Fang, Zhi, Chou, Kuo-Chih, Yang, Weiyou, Hou, Xinmei, Wu, Tom
Format: Article
Language:English
Subjects:
Absorption spectra
Bonding strength
Crystals
Dopants
Doping
Electron beams
Electron irradiation
Free energy
Heat of formation
High acceleration
High energy electrons
Irradiation
Lead
Metals
Nanocrystals
Nanomaterials
Nanotechnology
Organic chemistry
Perovskites
Phase stability
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Summary: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 Mn 2+ -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 Mn 2+ doping provide an enhanced chemical stability to the perovskite NCs. Furthermore, the enlarged tolerance factor of the NCs with Mn 2+ 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.
ISSN:2050-7488
2050-7496
DOI:10.1039/C9TA01898K