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Phase 2 of the array automated assembly task for the low cost solar array projectThe process sequence for the fabrication of dendritic web silicon into solar panels was modified to include aluminum back surface field formation. Plasma etching was found to be a feasible technique for pre-diffusion cleaning of the web. Several contacting systems were studied. The total plated Pd-Ni system was not compatible with the process sequence; however, the evaporated TiPd-electroplated Cu system was shown stable under life testing. Ultrasonic bonding parameters were determined for various interconnect and contact metals but the yield of the process was not sufficiently high to use for module fabrication at this time. Over 400 solar cells were fabricated according to the modified sequence. No sub-process incompatibility was seen. These cells were used to fabricate four demonstration modules. A cost analysis of the modified process sequence resulted in a selling price of $0.75/peak watt.
Document ID
19800013347
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Campbell, R. B. (Westinghouse Research and Development Center Pittsburgh, PA, United States)
Davis, J. R. (Westinghouse Research and Development Center Pittsburgh, PA, United States)
Ostroski, J. W. (Westinghouse Research and Development Center Pittsburgh, PA, United States)
Rai-Choudhury, P. (Westinghouse Research and Development Center Pittsburgh, PA, United States)
Rohatgi, A. (Westinghouse Research and Development Center Pittsburgh, PA, United States)
Seman, E. J. (Westinghouse Research and Development Center Pittsburgh, PA, United States)
Stapleton, R. E. (Westinghouse Research and Development Center Pittsburgh, PA, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1979
Subject Category
Energy Production And Conversion
Report/Patent Number
NASA-CR-162628
DOE/JPL-954873-79/08
Accession Number
80N21833
Funding Number(s)
CONTRACT_GRANT: NAS7-100
CONTRACT_GRANT: JPL-954873
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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