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Experimental Studies on Mass Transport of Cadmium-Zinc Telluride by Physical Vapor TransportExperimental studies on mass transport of ternary compound, Cd(1-x)Zn(x)Te by physical vapor transport (PVT) for source compositions up to X = 0.21 are presented. The effect of thermochemical (temperatures, vapor composition) and other factors (preparation of the source, crystal growth rate, temperature gradient) on composition and composition profiles of the grown crystals were investigated. A steep decrease in the mass flux with an increase in X(crystal) for X less than 0.1, and a difference in composition between the source and the deposited material have been observed. The composition profiles of the crystals were found to depend on the density and pretreatment of the source, and on the temperature gradient in the source zone. The homogeneity of the crystals improves at low undercoolings and/or when an appropriate excess of metal constituents is present in the vapor phase. The experimental results are in good agreement with our thermochemical model of this system.
Document ID
19970007588
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Palosz, W.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Szofran, F. R.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Lehoczky, S. L.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Date Acquired
August 17, 2013
Publication Date
January 1, 1995
Publication Information
Publication: Journal of Crystal Growth
Publisher: Elsevier Science B.V.
Issue: 148
ISSN: 0022-0248
Subject Category
Solid-State Physics
Report/Patent Number
NAS 1.15:111919
NASA-TM-111919
Accession Number
97N70575
Distribution Limits
Public
Copyright
Public Use Permitted.
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