CsPbBr3 perovskite single crystals for X- and gamma-radiation detectors

V. Sklyarchuk; P. Fochuk; O. Kopach; A. E. Bolotnikov; R. B. James

doi:10.1117/12.2676107

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

Proceedings Volume 12696, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXV; 126960K (2023) https://doi.org/10.1117/12.2676107
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

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 Е_g = 2.27 eV. The temperature dependence of the forbidden gap (E_g(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.

Citation Download Citation

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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