Photoluminescence Excitation Spectroscopy of Defect-Related States in MAPbI3 Perovskite Single Crystals

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Abstract

The MAPbI3 halide perovskite single crystals are studied at 5 K temperature using the photoluminescence excitation spectroscopy. Two noninteracting types of states are determined: bound excitons and defect-related states. Excitation of the crystal with light energy below the bound exciton resonance reveals the complex low-density defect emission, otherwise hidden by the emission of bound excitons. A way to separate these defect-related luminescence spectra is proposed, and the thorough study of this emission regime is carried out. The results of this study open an area of low-density defect and dopant exploration in halide perovskite semiconductors.

Translated title of the contributionСпектроскопия возбуждения фотолюминесценции дефектных состояний в монокристаллах перовскита MAPbI3
Original languageEnglish
Article number2001327
Number of pages4
JournalAdvanced Optical Materials
Early online date10 Nov 2020
DOIs
StatePublished - 10 Nov 2020

Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Keywords

  • defect‐related states
  • excitons
  • halide perovskites
  • photoluminescence excitation spectroscopy
  • defect-related states
  • related states
  • defect&#8208
  • ABSORPTION
  • EXCITONS

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