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Making Ultrathin Solar CellsProcess produces extremely thin silicon solar cells - only 50 micrometers or less in thickness. Electrons and holes have less opportunity to recombine before collected at cell surfaces. Efficiency higher and because volume of silicon small, less chance of radiation damage in new cells. Initial steps carried out at normal thickness to reduce breakage and avoid extra cost of special handling. Cells then thinned mechanically and chemically. Final cell includes reflective layer on back surface. Layer bounces unabsorbed light back into bulk silicon so it absorbs and produces useful electrical output.
Document ID
19910000024
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Cogan, George W.
(SERA Solar Corp.)
Christel, Lee A.
(SERA Solar Corp.)
Merchant, J. Thomas
(SERA Solar Corp.)
Gibbons, James F.
(SERA Solar Corp.)
Date Acquired
August 14, 2013
Publication Date
January 1, 1991
Publication Information
Publication: NASA Tech Briefs
Volume: 15
Issue: 1
ISSN: 0145-319X
Subject Category
Fabrication Technology
Report/Patent Number
NPO-17798
Accession Number
91B10024
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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