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Vapor Transport Crystal Growth of Mercury-Cadmium-Telluride in MicrogravityTwo epitaxial growth experiments of Hg1-xCdxTe layers on (100) CdTe substrates in closed ampoules using HgI2 as a transport agent have been performed during the USML-1 mission. The characterization results to date demonstrate a considerable improvement of the space-grown epitaxial layers relative to ground-control specimens in terms of morphology, compositional uniformity, and structural micro homogeneity. These results show the effects of microgravity and fluid dynamic disturbances on-ground on the deposition and growth processes. The continued analysis of this technologically important system is designed to further elucidate the observed crystallographic improvements and their relation to mass flow.
Document ID
19950007802
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Heribert Wiedemeier
(Rensselaer Polytechnic Institute Troy, United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1994
Publication Information
Publication: Joint Launch + One Year Science Review of USML-1 and USMP-1 with the Microgravity Measurement Group
Publisher: National Aeronautics and Space Administration
Subject Category
Materials Processing
Report/Patent Number
NASA-CP-3272-VOL-1
Meeting Information
Meeting: Joint Launch + One Year Science Review of USML-1 and USMP-1 with the Microgravity Measurement Group
Location: Huntsville, AL
Country: US
Start Date: September 22, 1993
End Date: September 24, 1993
Sponsors: National Aeronautics and Space Administration
Accession Number
95N14216
Distribution Limits
Public
Copyright
Portions of document may include copyright protected material.
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