Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/168692
Title: Dual phases of crystalline and electronic structures in the nanocrystalline perovskite CsPbBr3
Authors: Whitcher, T. J. 
Gomes, L. C. 
Zhao, D.
Bosman, M. 
Chi, X. 
Wang Y.
Carvalho, A. 
Hui, H. K.
Chang, Q.
Breese, M. B. H. 
Castro Neto A. H. 
Wee, A. T. S. 
Sun, H. D.
Chia, E. E. M.
Rusydi, A. 
Issue Date: 22-Nov-2019
Publisher: Nature Research
Citation: Whitcher, T. J., Gomes, L. C., Zhao, D., Bosman, M., Chi, X., Wang Y., Carvalho, A., Hui, H. K., Chang, Q., Breese, M. B. H., Castro Neto A. H., Wee, A. T. S., Sun, H. D., Chia, E. E. M., Rusydi, A. (2019-11-22). Dual phases of crystalline and electronic structures in the nanocrystalline perovskite CsPbBr3. NPG ASIA MATERIALS 11 (1). ScholarBank@NUS Repository.
Abstract: Inorganic perovskites have recently attracted much attention as promising new nanocrystalline materials that have interesting fundamental phenomena and great potential in several applications. Herein, we reveal unusual structural and electronic changes in nanocrystalline cesium lead bromide (CsPbBr3) as a function of temperature using high-resolution spectroscopic ellipsometry, high-resolution transmission electron microscopy and terahertz spectroscopy measurements supported by first-principles calculations. New dual phases of crystalline and electronic structures are observed due to the nanocrystalline nature of the material. Interestingly, a change in the electronic structure occurs below 150 K, and the rate at which the nanocrystal transitions from the tetragonal to orthorhombic phase is found to be nonlinear with temperature. Our results show the importance of the charge and lattice interplay in determining the dual phases and fundamental properties of nanocrystalline materials. © 2019, The Author(s).
Source Title: NPG ASIA MATERIALS
URI: https://scholarbank.nus.edu.sg/handle/10635/168692
ISSN: 18844057
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