Poster + Paper
3 October 2023 CsPbBr3 perovskite single crystals for X- and γ-radiation detectors
V. Sklyarchuk, P. Fochuk, O. Kopach, A. E. Bolotnikov, R. B. James
Author Affiliations +
Conference Poster
Abstract
Methods were developed for the synthesis and growth of the inorganic perovskite CsPbBr3, which can be used for detection of optical, x-ray, and γ-radiation. The growth of single crystals of these compounds was carried out by the Bridgman method in quartz ampoules using zone-refined starting materials. The electro-physical properties of the lead cesium tribromide CsPbBr3 were studied. Two types of structures with a Cr/CsPbBr3/Ni rectifying barrier and Ni/CsPbBr3/Ni ohmic contacts were created. The resistivity of the semiconductor material (ρ≈7×109 Ohm•cm) and the activation energy of the dark conductivity (▵E≈0.8 eV) were determined. From the measurements of the optical transmission spectra, the energy gap of CsPbBr3 at 300 K was found to be Еg = 2.27 eV. The temperature dependence of the forbidden gap (Eg(T) = 2.4 - 4*10-4 T, eV) was also determined. A significant increase in photosensitivity for the Cr/CsPbBr3/Ni structure was observed at elevated temperatures. The Cr/CsPbBr3/Ni structures were shown to be sensitive to γ radiation. The FWHM of the energy resolution for an 241Am source was measured to be 15.8 keV.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
V. Sklyarchuk, P. Fochuk, O. Kopach, A. E. Bolotnikov, and R. B. James "CsPbBr3 perovskite single crystals for X- and γ-radiation detectors", Proc. SPIE 12696, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXV, 126960K (3 October 2023); https://doi.org/10.1117/12.2676107
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KEYWORDS
Nickel

Crystals

Perovskite

Semiconductors

Resistance

Optical transmission

Chromium

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