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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.

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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

  • Sizhan Liu

    NJIT

Authors

  • Sizhan Liu

    NJIT

  • Mahalingam Balasubramanian

    Argonne National Laboratory

  • Zhenxian Liu

    University of Illinois at Chicago

  • Yu-Sheng Chen

    University of Chicago

  • Stella Chariton

    Center for Advanced Radiation Sources, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637, USA, Center for Advanced Radiation Sources, University of Chicago, University of Chicago, GSECARS, Advanced Photon Source, Argonne National Laboratory

  • Vitali B Prakapenka

    Center for Advanced Radiation Sources, University of Chicago, University of Chicago, Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 60439, USA, GSECARS, Advanced Photon Source, Argonne National Laboratory

  • Xiangpeng Luo

    University of Michigan

  • Liuyan Zhao

    University of Michigan

  • Yong Yang

    San Diego State University

  • Sanjit Ghose

    Brookhaven National Laboratory

  • Trevor A Tyson

    New Jersey Inst of Tech