Charge Transport Properties of CdTe X/γ-Rays Detectors with TiOx Schottky Contacts

O. Maslyanchuk, M. Solovan, V. Brus, I. Fodchuk, V. Gnatyuk, T. Aoki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The structure and electrical properties of CdTe Schottky diode X/γ-rays detectors fabricated by DC reactive magnetron sputtering of Ti on the surface of semi-insulating p-like CdTe single crystals have been investigated. At relatively low voltages, the current transport processes in the Ti-TiOx/p-CdTe/MoOx-Mo structure are well described in the scope of the carrier generation in the space-charge region and space-charge limited current models. The charge carrier lifetime, energies of generation-recombination centers and hole traps, and density of discrete trapping centers were determined by comparing the experimental and calculation data. Because of the presence of a thin intermediate insulator layer in the p-CdTe/MoOx-Mo contact, a rapid increase in the reverse current due to the Poole-Frenkel emission is observed. The results obtained from the measurements of the I-V characteristics and model of space-charge limited current incorporating the Poole-Frenkel effect are compared and discussed.

Original languageEnglish
Title of host publication2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538684948
DOIs
Publication statusPublished - Nov 2018
Externally publishedYes
Event2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Sydney, Australia
Duration: Nov 10 2018Nov 17 2018

Publication series

Name2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings

Conference

Conference2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018
CountryAustralia
CitySydney
Period11/10/1811/17/18

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Nuclear and High Energy Physics

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