TY - GEN
T1 - Charge Transport Properties of CdTe X/γ-Rays Detectors with TiOx Schottky Contacts
AU - Maslyanchuk, O.
AU - Solovan, M.
AU - Brus, V.
AU - Fodchuk, I.
AU - Gnatyuk, V.
AU - Aoki, T.
PY - 2018/11
Y1 - 2018/11
N2 - 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.
AB - 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.
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U2 - 10.1109/NSSMIC.2018.8824468
DO - 10.1109/NSSMIC.2018.8824468
M3 - Conference contribution
AN - SCOPUS:85073100502
T3 - 2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings
BT - 2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018
Y2 - 10 November 2018 through 17 November 2018
ER -