Diffuse Neutron and X-ray Scattering from Cesium Lead Bromide

ORAL

Abstract

Cesium lead bromide has attracted recent attention, along with other lead halide perovskites, due to its optoelectronic properties. It has been proposed that the long carrier life supporting these properties is due to local polar fluctuations. To investigate the short-range lattice distortions that such fluctuations would imply, diffuse neutron and x-ray scattering experiments were performed on single crystals of CsPbBr3 across range of temperatures spanning two structural phase transitions. Significant diffuse scattering indicating short-range displacement correlations was found in all three structural phases. In particular, diffuse neutron scattering from CsPbBr3 shows distinct elastic and inelastic features, distinguishing between static and dynamic forms of local displacement correlations.

*This work was funded by DOE, BES, DMSE.

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Presenters

  • Matthew Krogstad

    • Materials Science Division, Argonne National Laboratory
    • Argonne National Laboratory

Authors

  • Matthew Krogstad

    • Materials Science Division, Argonne National Laboratory
    • Argonne National Laboratory

  • Alex Rettie

    • Materials Science Division, Argonne National Laboratory

  • Stephan Rosenkranz

    • Materials Science Division, Argonne National Laboratory
    • Argonne National Laboratory

  • Duck Young Chung

    • Materials Science Division, Argonne National Laboratory
    • Materials Science Division, Argonne National Lab
    • Argonne National Laboratory

  • Mercouri Kanatzidis

    • Department of Chemistry, Northwestern University
    • Chemistry, Northwestern University
    • Chemistry, Northwestern University, Evanston, IL 60208
    • Northwestern University
    • Materials Science Division, Argonne National Laboratory
    • Argonne National Laboratory

  • Feng Ye

    • Quantum Condensed Matter Division, Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National LaboratoryOak Ridge, Tennessee 37381, USA
    • Quantum Condensed Matter Division, Oak Ridge National Laboratory, TN 37831
    • Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Laboratory

  • Xing He

    • Department of Mechanical Engineering and Materials Science, Duke University
    • Mechanical Engineering and Materials Science, Duke University

  • Olivier Delaire

    • Department of Mechanical Engineering and Materials Science, Duke University
    • Mechanical Engineering and Materials Science, Physics, Duke University
    • Duke University
    • Department of Mechanical Engineering & Materials Science, Duke University

  • Raymond Osborn

    • Materials Science Division, Argonne National Laboratory
    • Argonne National Laboratory