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Crystal Growth of ZnSe and Related Ternary Compound Semiconductors by Vapor TransportThe objective of the project is to determine the relative contributions of gravity-driven fluid flows to the compositional distribution, incorporation of impurities and defects, and deviation from stoichiometry observed in the crystals grown by vapor transport as results of buoyance-driven convection and growth interface fluctuations caused by irregular fluid-flows. ZnSe and related ternary compounds, such as ZnSeS and ZnSeTe, were grown by vapor transport technique with real time in-situ non-invasive monitoring techniques. The grown crystals were characterized extensively to correlate the grown crystal properties with the growth conditions. The following are the research progress in the past two years. In-situ monitoring of partial pressure by optical absorption technique and visual observation of the growing crystal were performed during vapor growth of ZnSe. Low-temperature photoluminescence (PL) spectra and glow discharge mass spectroscopy (GDMS) were measured on ZnSe starting materials provided by various vendors and on bulk crystals grown from these starting materials by physical vapor transport (PVT) to study the effects of purification and contamination during crystal growth process. Optical characterization was performed on wafers sliced from the grown crystals of ZnSe, ZnTe and ZnSe(1-x),Te(x), (0
Document ID
20020066471
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Su, Ching-Hua
(NASA Marshall Space Flight Center Huntsville, AL United States)
Brebrick, R. F.
(Marquette Univ. Milwaukee, WI United States)
Dudley, M.
(State Univ. of New York Stony Brook, NY United States)
Ramachandran, N.
(Universities Space Research Association United States)
Curreri, Peter A.
Date Acquired
August 20, 2013
Publication Date
January 1, 2002
Subject Category
Solid-State Physics
Meeting Information
Meeting: 2002 NASA Materials Science Conference
Location: Huntsville, AL
Country: United States
Start Date: June 25, 2002
End Date: June 26, 2002
Sponsors: NASA Headquarters
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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