Perovskite CsPbBr₃ Single Crystal Detector for Alpha-Particle Spectroscopy.

Journal Article · Wed Jan 09 23:00:00 EST 2019 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2019.01.008· OSTI ID:1494552

He, Yihui ^[1]; Liu, Zhifu ^[1]; McCall, Kyle M. ^[1]; Lin, Wenwen ^[2]; Chung, Duck Young ^[2]; Wessels, Bruce W. ^[1]; Kanatzidis, Mercouri G. ^[1]

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1. Northwestern Univ., Evanston, IL (United States)
2. Argonne National Lab. (ANL), Argonne, IL (United States)

Here we report the first spectroscopic alpha particle detection based on CsPbBr₃ detectors with asymmetric contacts. The CsPbBr₃ single crystal was grown from melt using Bridgman method and then fabricated into detectors with different contacts. The In/CsPbBr₃/Au detector presented a low dark current (~100 nA/cm²) 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 ⁵⁷Co 122 keV γ ray. The CsPbBr₃ detector was capable of simultaneously resolving both the alpha particle (5.5 MeV) and γ ray (59.5 keV) peaks from ²⁴¹Am radiative isotope. The transport properties of CsPbBr₃ 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 cm²/(V∙s) respectively. The calculated electron and hole mobility-lifetime products were 4.5 x 10^-4 and 9.5 x 10^-4 cm²/V, respectively, demonstrating superior transport properties of holes over electrons in CsPbBr₃. As a result, 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.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); U. S. Department of Homeland Security
• Grant/Contract Number: AC02-06CH11357
• OSTI ID: 1494552
• Journal Information: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Journal Issue: none Vol. 922; ISSN 0168-9002
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CsPbBr3
alpha particle detection
crystal growth
perovskite single crystal