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Efficiency of tandem solar cell systems as function of temperature and solar energy concentration ratioThe results of a comprehensive theoretical analysis of tandem photovoltaic solar cells as a function of temperature and solar concentration ratio are presented. The overall efficiencies of tandem cell stacks consisting of as many as 24 cells having gaps in the 0.7 to 3.6 eV range were calculated for temperatures of 200, 300, 400, and 500 K and for illumination by an AMO solar spectrum having concentration ratios of 1, 100, 500, and 1000 suns. For ideal diodes (A = B = 1), the calculations show that the optimized overall efficiency has a limiting value eta sub opt of approximately 70 percent for T = 200 K and C = 1000; for T = 300 K and C = 1000, this limiting efficiency approaches 60 percent.
Document ID
19790024500
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Gokcen, N. A. (Bureau of Mines Washington, DC, United States)
Loferski, J. J. (Brown Univ.)
Date Acquired
August 9, 2013
Publication Date
August 1, 1979
Publication Information
Publication: NASA. Lewis Res. Center Solar Cell High Efficiency and Radiation Damage, 1979
Subject Category
Energy Production And Conversion
Accession Number
79N32671
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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