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arXiv · 2005.02900

Defect-related states in MAPbI$_3$ halide perovskite single crystals revealed by the photoluminescence excitation spectroscopy

A. O. Murzin·N. I. Selivanov·V. O. Kozlov·I. I. Ryzhov·A. V. Emeline·Yu. V. Kapitonov
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Abstract

The MAPbI$_3$ halide perovskite single crystals are studied at 5 K temperature using the photoluminescence excitation spectroscopy. Two non-interacting 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 defects 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 opens an area of low-density defects and dopants exploration in halide perovskite semiconductors.

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A. O. Murzin, N. I. Selivanov, V. O. Kozlov, I. I. Ryzhov, A. V. Emeline, Yu. V. Kapitonov. 2020-05-06. Defect-related states in MAPbI$_3$ halide perovskite single crystals revealed by the photoluminescence excitation spectroscopy. https://arxiv.org/abs/2005.02900

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