Resolving the Energy of γ-Ray Photons with MAPbI3 Single Crystals

Yihui He, Weijun Ke, Grant C.B. Alexander, Kyle M. McCall, Daniel G. Chica, Zhifu Liu, Ido Hadar, Constantinos C. Stoumpos, Bruce W. Wessels, Mercouri G. Kanatzidis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

97 Scopus citations


Halide perovskites exhibit remarkably high-performance as semiconductors compared to conventional materials because of an unusually favorable combination of optoelectronic properties. We demonstrate here that solution-grown single-crystals of organic-inorganic hybrid perovskite CH3NH3PbI3 (MAPbI3), implemented in a Schottky-type device design, can produce outstanding hard radiation detectors with high spectral response and low dark current for the first time. Schottky-type MAPbI3 detector achieves an excellent energy resolution of 6.8% for 57Co 122 keV gamma ray. The high detector performance is achieved due to the balanced charge collection efficiency for both electrons and holes, reflected in the high mobility-lifetime (μτ) products of both carriers (∼0.8 × 10-3 cm2/V). MAPbI3 also demonstrates remarkably long electron and hole lifetimes (τe = 10 μs and τh = 17 μs) and impressive operational stability over time. Furthermore, dual-source detection of α particle (5.5 MeV) and γ-ray (59.5 keV) from the 241Am radiation source is achieved simultaneously by Schottky-type MAPbI3 detector. These results reveal the great potential of MAPbI3 as a high-performance, low-cost radiation detection material.

Original languageAmerican English
Pages (from-to)4132-4138
Number of pages7
JournalACS Photonics
Issue number10
StatePublished - 17 Oct 2018
Externally publishedYes

Bibliographical note

Publisher Copyright:
© Copyright 2018 American Chemical Society.


  • charge transport
  • hybrid halide perovskite
  • radiation detection
  • semiconductor detector
  • γ-ray spectroscopy


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