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11 November 2016 The nature of dynamic disorder in lead halide perovskite crystals (Conference Presentation)
Omer Yaffe, Yinsheng Guo, Trevor Hull, Costas Stoumpos, Liang Z. Tan, David A. Egger, Fan Zheng, Guilherme Szpak, Octavi E. Semonin, Alexander N. Beecher, Tony F. Heinz, Leeor Kronik, Andrew M. Rappe, Mercouri G. Kanatzidis, Jonathan S. Owen, Marcos A. Pimenta, Louis E. Brus
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Proceedings Volume 9923, Physical Chemistry of Interfaces and Nanomaterials XV; 99231B (2016) https://doi.org/10.1117/12.2236330
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States
Abstract
We combine low frequency Raman scattering measurements with first-principles molecular dynamics (MD) to study the nature of dynamic disorder in hybrid lead-halide perovskite crystals. We conduct a comparative study between a hybrid (CH3NH3PbBr3) and an all-inorganic lead-halide perovskite (CsPbBr3). Both are of the general ABX3 perovskite formula, and have a similar band gap and structural phase sequence, orthorhombic at low temperature, changing first to tetragonal and then to cubic symmetry as temperature increases. In the high temperature phases, we find that both compounds show a pronounced Raman quasi-elastic central peak, indicating that both are dynamically disordered.
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View presentation recording on the SPIE Digital Library: http://dx.doi.org/10.1117/12.2236330.5161498054001
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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Omer Yaffe, Yinsheng Guo, Trevor Hull, Costas Stoumpos, Liang Z. Tan, David A. Egger, Fan Zheng, Guilherme Szpak, Octavi E. Semonin, Alexander N. Beecher, Tony F. Heinz, Leeor Kronik, Andrew M. Rappe, Mercouri G. Kanatzidis, Jonathan S. Owen, Marcos A. Pimenta, and Louis E. Brus "The nature of dynamic disorder in lead halide perovskite crystals (Conference Presentation)", Proc. SPIE 9923, Physical Chemistry of Interfaces and Nanomaterials XV, 99231B (11 November 2016); https://doi.org/10.1117/12.2236330
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Cited by 2 scholarly publications.
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KEYWORDS
Perovskite
Crystals
Lead
Crystallography
High temperature raman spectroscopy
Raman scattering
Raman spectroscopy
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