NDLI: Silicon web process development (Document No: 19800020363)

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Silicon web process development (Document No: 19800020363)

Content Provider	NASA Technical Reports Server (NTRS)
Author	Hill, F. E. Skutch, M. E. Seidensticker, R. G. McHugh, J. P. Duncan, C. S. Driggers, J. M. Hopkins, R. H.
Copyright Year	1980
Description	A barrier crucible design which consistently maintains melt stability over long periods of time was successfully tested and used in long growth runs. The pellet feeder for melt replenishment was operated continuously for growth runs of up to 17 hours. The liquid level sensor comprising a laser/sensor system was operated, performed well, and meets the requirements for maintaining liquid level height during growth and melt replenishment. An automated feedback loop connecting the feed mechanism and the liquid level sensing system was designed and constructed and operated successfully for 3.5 hours demonstrating the feasibility of semi-automated dendritic web growth. The sensitivity of the cost of sheet, to variations in capital equipment cost and recycling dendrites was calculated and it was shown that these factors have relatively little impact on sheet cost. Dendrites from web which had gone all the way through the solar cell fabrication process, when melted and grown into web, produce crystals which show no degradation in cell efficiency. Material quality remains high and cells made from web grown at the start, during, and the end of a run from a replenished melt show comparable efficiencies.
File Size	10666821
Page Count	172
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19800020363
Archival Resource Key	ark:/13960/t7wm63d59
Language	English
Publisher Date	1980-06-30
Access Restriction	Open
Subject Keyword	Energy Production And Conversion Solar Cells Crystal Growth Dendritic Crystals Melts Crystal Growth Crucibles Silicon Cost Analysis Webs Sheets Pellets Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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