Journal
NANOSCALE
Volume 11, Issue 3, Pages 820-825Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nr05684f
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Funding
- National Key R&D Program of China [2018YFA0305900]
- National Science Foundation of China [21725304, 11774125, 21673100, 91227202, 11774120]
- Chang Jiang Scholars Program of China [T2016051]
- Changbai Mountain Scholars Program [2013007]
- National Defense Science and Technology Key Laboratory Fund [6142A0306010917]
- Scientific Research Planning Project of the Education Department of Jilin Province [JJKH20180118KJ]
- Program for Innovative Research Team (in Science and Technology) in Jilin University
- JLU Science and Technology Innovative Research Team [2017TD-01]
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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.
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