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Structural stability and optical properties of two-dimensional perovskite-like CsPb2Br5 microplates in response to pressure

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Abstract

Here, we report the structural stability and visible light response of two-dimensional (2D) layered perovskite-like CsPb2Br5 microplates (MPs) under high pressure. In situ high-pressure emission, optical absorption, and angle dispersive synchrotron X-ray diffraction indicated that CsPb2Br5 MPs experienced an isostructural phase transformation at roughly 1.6 GPa. The shrinkage of Pb–Br bond lengths and the marked change of Br–Pb–Br bond angles within the lead-bromide pentahedral motif were responsible for the pressure-induced structural modulation and the sudden band-gap change of CsPb2Br5 MPs.

Graphical abstract: Structural stability and optical properties of two-dimensional perovskite-like CsPb2Br5 microplates in response to pressure

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Publication details

The article was received on 14 Jul 2018, accepted on 21 Nov 2018 and first published on 22 Nov 2018


Article type: Communication
DOI: 10.1039/C8NR05684F
Citation: Nanoscale, 2019, Advance Article
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    Structural stability and optical properties of two-dimensional perovskite-like CsPb2Br5 microplates in response to pressure

    Z. Ma, F. Li, G. Qi, L. Wang, C. Liu, K. Wang, G. Xiao and B. Zou, Nanoscale, 2019, Advance Article , DOI: 10.1039/C8NR05684F

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