On-Sun Comparison of GaInP2/GaAs Tandem Cells with Top-Cell Thickness Varied

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This study compares the on-sun performance of a set of GaInP2/GaAs tandem cells with different GaInP2 top-cell thicknesses. Because high-efficiency III-V cells are best suited to concentrating photovoltaic (CPV) applications, the cells were mounted on a two-axis tracker with the incident sunlight collimated to exclude all except the direct beam. Current-voltage (I-V) curves were taken throughout the course of several days, along with the direct solar spectrum. Our two major conclusions are: (1) GaInP2/GaAs tandem cells designed for an ''air mass 1.5 global'' (AM 1.5G) or a ''low aerosol optical depth'' (Low AOD) spectrum perform the best, and (2) a ... continued below

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McMahon, W. E.; Emery, K. A.; Friedman, D. J.; Ottoson, L.; Young, M. S.; Ward, J. S. et al. January 1, 2005.

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This study compares the on-sun performance of a set of GaInP2/GaAs tandem cells with different GaInP2 top-cell thicknesses. Because high-efficiency III-V cells are best suited to concentrating photovoltaic (CPV) applications, the cells were mounted on a two-axis tracker with the incident sunlight collimated to exclude all except the direct beam. Current-voltage (I-V) curves were taken throughout the course of several days, along with the direct solar spectrum. Our two major conclusions are: (1) GaInP2/GaAs tandem cells designed for an ''air mass 1.5 global'' (AM 1.5G) or a ''low aerosol optical depth'' (Low AOD) spectrum perform the best, and (2) a simple device model using the measured direct spectra as an input gives the same result. These results are equally valid for GaInP2/GaAs/Ge triple-junction cells.

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5 p.

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  • Related Information: Presented at the 2004 DOE Solar Energy Technologies Program Review Meeting, 25-28 October 2004, Denver, Colorado. Also included in the proceedings available on CD-ROM (DOE/GO-102005-2067; NREL/CD-520-37140)

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  • Report No.: NREL/CP-520-37022
  • Grant Number: AC36-99-GO10337
  • Office of Scientific & Technical Information Report Number: 860697
  • Archival Resource Key: ark:/67531/metadc782718

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  • January 1, 2005

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  • Dec. 3, 2015, 9:30 a.m.

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  • April 6, 2017, 12:45 p.m.

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McMahon, W. E.; Emery, K. A.; Friedman, D. J.; Ottoson, L.; Young, M. S.; Ward, J. S. et al. On-Sun Comparison of GaInP2/GaAs Tandem Cells with Top-Cell Thickness Varied, article, January 1, 2005; Golden, Colorado. (digital.library.unt.edu/ark:/67531/metadc782718/: accessed June 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.