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

4 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

Fingerprint

Dive into the research topics of 'Surface Engineering of Methylammonium Lead Bromide Perovskite Crystals for Enhanced X-ray Detection: Journal of Physical Chemistry Letters'. Together they form a unique fingerprint.

Cite this