NDLI: Silicon web process development. [for low cost solar cells

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Silicon web process development. [for low cost solar cells

Content Provider	NASA Technical Reports Server (NTRS)
Author	Hill, F. E. Heimlich, M. E. Seidensticker, R. G. McHugh, J. P. Duncan, C. S. Driggers, J. M. Hopkins, R. H.
Copyright Year	1979
Description	Silicon dendritic web, a single crystal ribbon shaped during growth by crystallographic forces and surface tension (rather than dies), is a highly promising base material for efficient low cost solar cells. The form of the product smooth, flexible strips 100 to 200 microns thick, conserves expensive silicon and facilitates automation of crystal growth and the subsequent manufacturing of solar cells. These characteristics, coupled with the highest demonstrated ribbon solar cell efficiency-15.5%-make silicon web a leading candidate to achieve, or better, the 1986 Low Cost Solar Array (LSA) Project cost objective of 50 cents per peak watt of photovoltaic output power. The main objective of the Web Program, technology development to significantly increase web output rate, and to show the feasibility for simultaneous melt replenishment and growth, have largely been accomplished. Recently, web output rates of 23.6 sq cm/min, nearly three times the 8 sq cm/min maximum rate of a year ago, were achieved. Webs 4 cm wide or greater were grown on a number of occassions.
File Size	56502528
Page Count	234
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19790020551
Archival Resource Key	ark:/13960/t56f0nr26
Language	English
Publisher Date	1979-04-01
Access Restriction	Open
Subject Keyword	Energy Production And Conversion Solar Cells Single Crystals Silicon Production Engineering Cost Reduction 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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