Photo-induced defects in MAPbBr3 single crystals

Yunae Cho, Hye Ri Jung, William Jo

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Single crystals of hybrid organic-inorganic halide perovskite have exhibited significantly good stability and a low trap density, leading to advantageous applications in optoelectronics. Even with recent development of high-quality perovskite single crystals, a defect analysis should be addressed to improve device performance in addition to understand the interaction between photo-generated carriers and defects. In this paper, we present a photo-induced defect characterization of CH3NH3PbBr3 (MAPbBr3) perovskite single crystals using an interpretation of photo-current and photo-capacitance measurement. The bulk and the interfacial defect densities of MAPbBr3 crystals with a gold electrode are examined by the characterization of photo-capacitive response under three different wavelengths of light. The transient photo-response of the single crystals reveals the occurrence of carrier trapping and a recombination process. The photo-response under the various light conditions provides a possible origin of defects in MAPbBr3 single crystals. Our comprehensive optoelectronic analysis provides the establishment of the link between the carrier transport and device performance depending on the illuminations. The fundamental understanding of photo-induced defects in perovskites can be helpful to realize the origin of electrical loss and develop highly efficient optoelectronic devices.

Original languageEnglish
Article number044005
JournalJPhys Energy
Volume3
Issue number4
DOIs
StatePublished - Oct 2021

Keywords

  • CH3NH3PbBr3
  • Defect characterization
  • Perovskite single crystals
  • Transient photoresponse

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