Structure of ABX<sub>3</sub>: Exploring the PT Phase Diagram
ORAL
Abstract
Perovskite photovoltaic ABX3 systems possess high energy-conversion efficiencies. Understanding their atomic-level properties will lead to their optimization and utilization in real-world applications. Synchrotron-based structural measurements over a broad range of temperatures and pressures are being conducted. The detailed studies have revealed new space group symmetries, which have revised the existing assignments. High-pressure measurements reveal multiple low-pressure phases, one of which exists as a metastable phase at ambient pressure. This work should help guide research in the perovskite photovoltaic community by providing the structural details needed to develop accurate theoretical models.
*This work is supported by NSF grant DMR-1809931.
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Publication: S. Liu S, A. R. DeFilippo, M. Balasubramanian, Z. Liu, S. G. Wang, Y. S. Chen, S. Chariton, V. Prakapenka, X. Luo, L. Zhao, J. S. Martin, Y. Lin, Y. Yan, S. K. Ghose, and T. A. Tyson, "High-Resolution In-Situ Synchrotron X-Ray Studies of Inorganic Perovskite CsPbBr3 : New Symmetry Assignments and Structural Phase Transitions", Adv. Sci (Weinh). 2021 Sep;8(18):e2003046
Presenters
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Sizhan Liu
- NJIT