On the Optical Response of Tellurium Activated Zinc Selenide ZnSe:Te Single Crystal

Dionysios Linardatos; Anastasios Konstantinidis; Ioannis Valais; Konstantinos Ninos; Nektarios Kalyvas; Athanasios Bakas; Ioannis Kandarakis; George Fountos; Christos Michail

doi:10.3390/cryst10110961

Crystals (Oct 2020)

On the Optical Response of Tellurium Activated Zinc Selenide ZnSe:Te Single Crystal

Dionysios Linardatos,
Anastasios Konstantinidis,
Ioannis Valais,
Konstantinos Ninos,
Nektarios Kalyvas,
Athanasios Bakas,
Ioannis Kandarakis,
George Fountos,
Christos Michail

Affiliations

Dionysios Linardatos: Department of Biomedical Engineering, Radiation Physics, Materials Technology and Biomedical Imaging Laboratory, University of West Attica, Ag. Spyridonos, 12210 Athens, Greece
Anastasios Konstantinidis: Radiological Sciences Group, Department of Medical Physics, Portsmouth Hospitals University NHS Trust, Queen Alexandra Hospital, Portsmouth L8S 4L8, UK
Ioannis Valais: Department of Biomedical Engineering, Radiation Physics, Materials Technology and Biomedical Imaging Laboratory, University of West Attica, Ag. Spyridonos, 12210 Athens, Greece
Konstantinos Ninos: Department of Biomedical Sciences, University of West Attica, Ag. Spyridonos, 12210 Athens, Greece
Nektarios Kalyvas: Department of Biomedical Engineering, Radiation Physics, Materials Technology and Biomedical Imaging Laboratory, University of West Attica, Ag. Spyridonos, 12210 Athens, Greece
Athanasios Bakas: Department of Biomedical Sciences, University of West Attica, Ag. Spyridonos, 12210 Athens, Greece
Ioannis Kandarakis: Department of Biomedical Engineering, Radiation Physics, Materials Technology and Biomedical Imaging Laboratory, University of West Attica, Ag. Spyridonos, 12210 Athens, Greece
George Fountos: Department of Biomedical Engineering, Radiation Physics, Materials Technology and Biomedical Imaging Laboratory, University of West Attica, Ag. Spyridonos, 12210 Athens, Greece
Christos Michail: Department of Biomedical Engineering, Radiation Physics, Materials Technology and Biomedical Imaging Laboratory, University of West Attica, Ag. Spyridonos, 12210 Athens, Greece

DOI: https://doi.org/10.3390/cryst10110961
Journal volume & issue: Vol. 10, no. 11
p. 961

Abstract

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In this study, the light output of a zinc selenide activated with tellurium (ZnSe: Te) single crystal was measured for X-ray radiography applications. A cubic crystal (10 × 10 × 10 mm) was irradiated using X-rays with tube voltages from 50 to 130 kV. The resulting energy absorption efficiency, detective quantum efficiency, and absolute luminescence efficiency were compared to published data for equally sized GSO: Ce (gadolinium orthosilicate) and BGO (bismuth germanium oxide) crystals. The emitted light was examined to estimate the spectral compatibility with widely used optical sensors. Energy absorption efficiency and detective quantum efficiency of ZnSe: Te and BGO were found to be similar, within the X-ray energies in question. Light output of all three crystals showed a tendency to increase with increasing X-ray tube voltage, but ZnSe: Te stood at least 2 EU higher than the others. ZnSe: Te can be coupled effectively with certain complementary metal–oxide–semiconductors (CMOS), photocathodes, and charge-coupled-devices (CCD), as the effective luminescence efficiency results assert. These properties render the material suitable for various imaging applications, dual-energy arrays included.

Published in Crystals

ISSN: 2073-4352 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Crystallography
Website: http://www.mdpi.com/journal/crystals/

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