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Mechanisms limiting the performance of large grain polycrystalline silicon solar cellsThe open-circuit voltage and short-circuit current of large-grain (1 to 10 mm grain diameter) polycrystalline silicon solar cells is determined by the minority-carrier diffusion length within the bulk of the grains. This was demonstrated by irradiating polycrystalline and single-crystal (Czochralski) silicon solar cells with 1 MeV electrons to reduce their bulk lifetime. The variation of short-circuit current with minority-carrier diffusion length for the polycrystalline solar cells is identical to that of the single-crystal solar cells. The open-circuit voltage versus short-circuit current characteristic of the polycrystalline solar cells for reduced diffusion lengths is also identical to that of the single-crystal solar cells. The open-circuit voltage of the polycrystalline solar cells is a strong function of quasi-neutral (bulk) recombination, and is reduced only slightly, if at all, by grain-boundary recombination.
Document ID
19850029278
Document Type
Conference Paper
Authors
Culik, J. S. (Solarex Corp. Rockville, MD, United States)
Alexander, P. (Solarex Corp. Rockville, MD, United States)
Dumas, K. A. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Wohlgemuth, J. W. (Cabot Corp. Billerica, MA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1984
Subject Category
ENERGY PRODUCTION AND CONVERSION
Meeting Information
Photovoltaic Solar Energy Conference(Athens)
Funding Number(s)
CONTRACT_GRANT: JPL-955902
Distribution Limits
Public
Copyright
Other