High Magnetic Field Spectroscopy of 2D Hybrid Organic Inorganic Perovskites

ORAL

Abstract

We have studied films of two-dimensional (2D) hybrid organic inorganic perovskites (2D-HOIP) using magneto-circular-dichroism (MCD), magneto-electro-absorption (MEA) and field-induced circularly polarized (FICPO) emission at high magnetic fields (up to 25 Tesla) at liquid-He temperature. Particular attention was given to the exciton fine structure in these materials including the exciton substate energy splitting and the Landé g-values. We found evidence for a dark exciton substate at the bottom of the exciton manifold having negative effective g-factor. We also studied the Landau levels related to the continuum bands in these materials from which we determined the energy gap and effective charge currier mass.

*The measurements were supported by the Department of Energy, Office of Science, Grant DESC0014579. The high field measurements were performed at the National High Magnetic Field Laboratory, which is supported by National Science Foundation Cooperative Agreement No. DMR-1644779 and the State of Florida.

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Presenters

  • Daniel Nikiforov

    • The University of Utah

Authors

  • Daniel Nikiforov

    • The University of Utah

  • Heshan S Hewa Walpitage

    • The University of Utah
    • University of Utah

  • Valy Z Vardeny

    • The University of Utah
    • University of Utah
    • University of Utah, Salt Lake City