Linear and Circularly Polarized Raman and Photoluminescence of a Chiral 2D Hybrid Lead-Halide Perovskite

ORAL

Abstract

Two-dimensional (2D) hybrid organic−inorganic lead halide perovskites are an exciting class of semiconducting materials for both fundamental study and applications in spin-based electronic devices. Single crystals of needle shaped, enantiomerically-pure methylbenzylammonium lead iodide (R-MBA)2PbI4 [R = right handed; MBA = C6H5C2H4NH3] perovskites were probed optically using CW, visible lasers. Raman and photoluminescence spectra were collected as a function of both linear and circular polarized beams, permitting assignment of the phonons and excitons based on symmetry. Low frequency Raman modes (<20 cm-1) are particularly sensitive to the differences in rotation of the circular polarization. The temperature dependence [down to 1.6 K] of both sets of the optical spectra were also analyzed. Present measurements include magneto-Raman and magneto-PL via unique instrumentation at NIST at fields up to 9 Tesla.

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Presenters

  • Angela R. Hight Walker

    • National Institute of Standards and Technology (NIST)

Authors

  • Maria F Munoz

    • National Institute of Standards and Technology (NIST)

  • Riccardo Torsi

    • National Institute of Standards and Technology (NIST)

  • Tehseen Adel

    • Department of Physical Sciences, University of Findlay
    • University of Findlay

  • Alan James Phillips

    • Colorado School of Mines

  • Jeffrey L Blackburn

    • NREL

  • Matthew Hautzinger

    • NREL

  • David B Mitzi

    • Duke Univeristy

  • Volker Blum

    • Duke University

  • Rayan Chakraborty

    • Duke University

  • Xixi Qin

    • SLAC National Accelerator Laboratory
    • SLAC

  • Angela R. Hight Walker

    • National Institute of Standards and Technology (NIST)