Polaron Masses in CH3NH3PbX3 Perovskites Determined by Landau Level Spectroscopy in Low Magnetic Fields

Abstract

We investigate the electron-phonon coupling in CH3NH3PbX3 lead halide perovskites through the observation of Landau levels and high-order excitons at weak magnetic fields, where the cyclotron energy is significantly smaller than the longitudinal optical phonon energy. The reduced masses of the carriers and the exciton binding energies obtained from these data are clearly influenced by polaron formation. We analyze the field-dependent polaronic and excitonic properties, and show that they can be quantitatively reproduced by the Frohlich large polaron model.

References in corpus (2)

• Steric engineering of metal-halide perovskites with tunable optical band gaps
• Modelization of charge carriers mobilities in halide perovskites: Fröhlich scattering and quantum localization effects in a dynamic disorder regime

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• Interband spectroscopy of Landau levels and magnetoexcitons in bulk black phosphorus