Surface Engineering of Methylammonium Lead Bromide Perovskite Crystals for Enhanced X-ray Detection: Journal of Physical Chemistry Letters

  • A.T. Gidey
  • , Y. Haruta
  • , A.P. Herman
  • , M. Grodzicki
  • , A.M. Melnychenko
  • , D. Majchrzak
  • , S. Mahato
  • , E. Rogowicz
  • , M. Syperek
  • , R. Kudrawiec
  • , M.I. Saidaminov
  • , A.L. Abdelhady

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The surface quality of lead halide perovskite crystals can extremely influence their optoelectronic properties and device performance. Here, we report a surface engineering crystallization technique in which we in situ grow a polycrystalline methylammonium lead tribromide (MAPbBr3) film on top of bulk mm-sized single crystals. Such MAPbBr3 crystals with a MAPbBr3 passivating film display intense green emission under UV light. X-ray photoelectron spectroscopy demonstrates that these crystals with emissive surfaces are compositionally different from typical MAPbBr3 crystals that show no emission under UV light. Time-resolved photoluminescence and electrical measurements indicate that the MAPbBr3 film/MAPbBr3 crystals possess less surface defects compared to the bare MAPbBr3 crystals. Therefore, X-ray detectors fabricated using the surface-engineered MAPbBr3 crystals provide an almost 5 times improved sensitivity to X-rays and a more stable baseline drift with respect to the typical MAPbBr3 crystals. © 2023 The Authors. Published by American Chemical Society.
Original languageBritish English
Pages (from-to)9136-9144
Number of pages9
JournalJ. Phys. Chem. Lett.
Volume14
Issue number40
DOIs
StatePublished - 2023

Keywords

  • Chemical detection
  • Lead compounds
  • Passivation
  • Perovskite
  • Single crystals
  • Surface defects
  • X ray detectors
  • American Chemical Society
  • Device performance
  • Halide perovskites
  • Optoelectronics devices
  • Optoelectronics property
  • Perovskite crystal
  • Polycrystalline
  • Surface engineering
  • UV-light
  • X-ray detections
  • X ray photoelectron spectroscopy

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