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Silicon Solar Cell Process Development, Fabrication and AnalysisRibbon to Ribbon (RTR) solar cells processed from polycrystalline feedstock showed maximum AMO efficiency of 5.6%. Solar cells from single crystalline feedstock showed slightly higher efficiency than those from polycrystalline feedstock, indicating maximum efficiency of about 6.6% with SiO AR coating. Single crystalline control cells gave 11-12% AMO efficiencies demonstrating that the poor performance of the RTR solar was due to the low quality of material itself. Dendritic web solar cells from the standard process showed maximum AMO efficiency of 9.8% while efficiency of control solar cells were around 11-12%. Web solar cells from back surface field (BSF) process indicated maximum AMO efficiency of 10.9%. Some improvement in open circuit voltage was noticed from the BSF process. Small light spot scanning experiments were carried out on the solar cells from Wacker Silso, EFG, RTR, and dendritic web ribbons. Photoresponse results provided information on localized cell performance and grain size in polycrystalline material, and agreed quite well with the cell performance data, such as efficiency, minority carrier diffusion length, and spectral response.
Document ID
19790012314
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Yoo, H. I. (Optical Coating Lab., Inc. City of Industry, CA, United States)
Iles, P. A. (Optical Coating Lab., Inc. City of Industry, CA, United States)
Tanner, D. P. (Optical Coating Lab., Inc. City of Industry, CA, United States)
Date Acquired
September 3, 2013
Publication Date
December 31, 1978
Subject Category
Energy Production And Conversion
Report/Patent Number
NASA-CR-158363
DOE/JPL-955089-79/1
QR-2
Accession Number
79N20485
Funding Number(s)
CONTRACT_GRANT: JPL-955089
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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