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Proceedings Paper

Correlations of secondary phases (SPs) with mobility lifetime (μτe) of the electrons in CZT crystals using IR microscopy
Author(s): Sachin Bhaladhare; W. Gitau Munge II; Santosh Swain; Amlan Datta; Cody James Havrilak; Raji Soundararajan; Kelly Jones; Martine C. Duff; K. G. Lynn
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Paper Abstract

Cadmium Zinc Telluride (CdZnTe/CZT) crystals were grown using a modified vertical Bridgman growth technique with 10 % Zn concentration at Washington State University (WSU). Analyses of the effects of volume (vol.) %, number density (cm-3), mean diameter (μm) of secondary phases (SPs) and thickness (mm) of the CZT crystals on single crystal properties such as carrier mobility lifetime (μτe) and resistivity (ρ) were performed. Some correlations were observed between μτe values of different CZT crystals and vol. %, number density, mean diameter of SPs and thickness of the crystals. High μτe and lower SP vol. % values were obtained for the ingots grown with rapid cool down times and with no intentional amounts of excess Te/Cd. For the selected samples, the effects of the SPs on the μτe values were established for the SPs whose mean diameters were ≤4 μm and >4 μm. These studies indicate vol. % and mean diameter of SPs are the important parameters for CZT crystal performance as a radiation detector.

Paper Details

Date Published: 27 September 2011
PDF: 13 pages
Proc. SPIE 8142, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIII, 81421O (27 September 2011); doi: 10.1117/12.894643
Show Author Affiliations
Sachin Bhaladhare, Washington State Univ. (United States)
W. Gitau Munge II, Washington State Univ. (United States)
Santosh Swain, Washington State Univ. (United States)
Amlan Datta, Washington State Univ. (United States)
Cody James Havrilak, Washington State Univ. (United States)
Raji Soundararajan, Washington State Univ. (United States)
Kelly Jones, Washington State Univ. (United States)
Martine C. Duff, Savannah River National Lab. (United States)
K. G. Lynn, Washington State Univ. (United States)

Published in SPIE Proceedings Vol. 8142:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIII
Larry A. Franks; Ralph B. James; Arnold Burger, Editor(s)

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