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Effects of Non-equilibrium Solidification on the Material Properties of Brick Silicon for PhotovoltaicsSilicon ingot growth technologies like the Ubiquitous Crystallization Process (UCP) are solidified within a shaping crucible. The rate at which heat can be lost from this crucible minus the rate at which heat is input from an external source determines the rate at which crystallization will occur. Occasionally, when the process parameters for solidification are exceeded, the normally large multi-centimeter grain size material assocated with the UCP will break down into regions containing extremely small, millimeter or less, grain size material. Accompanying this breakdown in grain growth is the development of so called sinuous grain boundaries. The breakdown in grain growth which results in this type of small grain structure with sinuous boundaries is usually associated with the rapid crystallization that would accompany a system failure. This suggests that there are limits to the growth velocity that one can obtain and still expect to produce material that would possess good photovoltaic properties. It is the purpose to determine the causes behind the breakdown of this material and what parameters will determine the best rates of solidification.
Document ID
19840020579
Document Type
Conference Paper
Authors
Regnault, W. F. (Semix, Inc. Gaithersburg, MD, United States)
Yoo, K. C. (Semix, Inc. Gaithersburg, MD, United States)
Soltani, P. K. (Semix, Inc. Gaithersburg, MD, United States)
Johnson, S. M. (Solarex Corp. Rockville, Md., United States)
Date Acquired
August 12, 2013
Publication Date
April 15, 1984
Publication Information
Publication: JPL Proc. of the Flat-Plate Solar Array Proj. Res. Forum on the High-Speed Growth and Characterization of Crystals for Solar Cells
Subject Category
SOLID-STATE PHYSICS
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19840020545Analytic PrimaryProceedings of the Flat-plate Solar Array Project Research Forum on the High-speed Growth and Characterization of Crystals for Solar Cells
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