Optical Orientation and Alignment of Excitons in Ensembles of Inorganic Perovskite Nanocrystals

ORAL

Abstract

We demonstrate the optical orientation and alignment of excitons in a two-dimensional layer of CsPbI3 perovskite nanocrystals prepared by colloidal synthesis, and measure the anisotropic exchange splitting of exciton levels in the nanocrystals. From the experimental data at low temperature (2 K), we obtain the average value of anisotropic splitting of bright exciton states of the order of 80 microeV. Our calculations demonstrate that there is a significant contribution to the splitting due to the nanocrystal shape anisotropy for all inorganic perovskite nanocrystrals.

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Presenters

  • Serguei Goupalov

    • Department of Physics, Jackson State Univ

Authors

  • Mikhail Nestoklon

    • Ioffe Institute

  • Serguei Goupalov

    • Department of Physics, Jackson State Univ

  • Roslan Dzhioev

    • Ioffe Institute

  • Olga Ken

    • Ioffe Institute

  • Vladimir Korenev

    • Ioffe Institute

  • Yuri Kusrayev

    • Ioffe Institute

  • Victor Sapega

    • Ioffe Institute

  • Chris de Weerd

    • Van der Waals-Zeeman Institute, University of Amsterdam

  • Leyre Gomez

    • Van der Waals-Zeeman Institute, University of Amsterdam

  • Tom Gregorkiewicz

    • Van der Waals-Zeeman Institute, University of Amsterdam

  • Junhao Lin

    • National Institute of Advanced Industrial Science and Technology

  • Kazu Suenaga

    • National Institute of Advanced Industrial Science and Technology
    • Nanomaterials Research Institute, AIST
    • National Institute of Advanced Industrial Science and Technology (AIST)

  • Yasufumi Fujiwara

    • Division of Materials and Manufacturing Science, Graduate School of Engineering

  • Lev Matyushkin

    • St. Petersburg Electrotechnical University LETI

  • Irina Yassievich

    • Ioffe Institute