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Proceedings Paper

Preliminary results on Bridgman grown CdZnTe detector crystals assisted by ampoule rotation
Author(s): Amlan Datta; Santosh Swain; Yunlong Cui; Arnold Burger; Kelvin Lynn
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Paper Abstract

Different rotation profiles were applied to the ampoule during Vertical Bridgman (VB) growth of Cd0.9Zn0.1Te (CZT) for enhancing compositional homogeneity, minimizing radial and axial segregation and stabilizing growth interface. The radial Zinc (Zn) segregation was significantly minimized. Improvements in the axial Zn segregation were also noticeable. The modifications in interface shapes during the growth were prominent from the photoluminescence (PL) studies. Improved grain structure was observed with growths containing lower (0.5 wt. %) initial excess Te; however with higher amount of initial excess Te (7.5 wt. %) high resistivity ingots with improved carrier properties were grown consistently but with lower single crystal yield. With more intense rotations, resistivity values within the ingot varied by an order of magnitude showing non uniformity in distribution of dopants.

Paper Details

Date Published: 24 October 2012
PDF: 10 pages
Proc. SPIE 8507, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIV, 850711 (24 October 2012); doi: 10.1117/12.930437
Show Author Affiliations
Amlan Datta, Washington State Univ. (United States)
Santosh Swain, Washington State Univ. (United States)
Yunlong Cui, Fisk Univ. (United States)
Arnold Burger, Fisk Univ. (United States)
Kelvin Lynn, Washington State Univ. (United States)

Published in SPIE Proceedings Vol. 8507:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIV
Ralph B. James; Arnold Burger; Larry A. Franks; Michael Fiederle, Editor(s)

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