Perovskite CsPbBr 3 single crystal detector for alpha-particle spectroscopy

Yihui He, Zhifu Liu, Kyle M. McCall, Wenwen Lin, Duck Young Chung, Bruce W. Wessels, Mercouri G. Kanatzidis

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Here we report the first spectroscopic alpha particle detection based on CsPbBr 3 detectors with asymmetric contacts. The CsPbBr 3 single crystal was grown from the melt using Bridgman method and then fabricated into detectors with different contacts. The In/CsPbBr 3 /Au detector presented a low dark current density (∼100 nA/cm 2 ) and temporal stable performance under high electric field (1000 V/cm). Such detector demonstrated excellent gamma ray resolving capability with a full-width at half maximum (FWHM) of ∼5.9 keV for the 57 Co 122 keV γ ray. The CsPbBr 3 detector was capable of simultaneously resolving both the alpha particle (5.5 MeV) and γ ray (59.5 keV) peaks from 241 Am radioactive isotope. The transport properties of CsPbBr 3 were then determined based on the alpha particle spectra and corresponding rise time distributions. The equivalent values of electron and hole mobilities were indicated as 63 and 49 cm 2 /(V ⋅ s) respectively. The calculated electron and hole mobility-lifetime products were 4.5 × 10 −4 and 9.5 × 10 −4 cm 2 /V, respectively, demonstrating superior transport properties of holes over electrons in CsPbBr 3 . This work widens the scope of perovskite detectors to encompass charged radiation as well as high energy X/γ rays, and will significantly promote and guide further studies on perovskite materials for radiation detection applications.

Original languageEnglish
Pages (from-to)217-221
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume922
DOIs
Publication statusPublished - Apr 1 2019

Keywords

  • Alpha particle detection
  • Crystal growth
  • CsPbBr
  • Perovskite single crystal

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

Fingerprint Dive into the research topics of 'Perovskite CsPbBr <sub>3</sub> single crystal detector for alpha-particle spectroscopy'. Together they form a unique fingerprint.

Cite this