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Title: Daily Fill Factor Variation as a Diagnostic Probe of Multijunction Concentrator Systems During Outdoor Operation

Abstract

The work presented here is for GaInP2/GaAs tandem cells, but the conclusions are equally valid for GaInP2/GaAs/Ge triple-junction cells. Optimizing a concentrator system which uses multijunction solar cells is challenging because: (a) the conditions are variable, so the solar cells rarely operate under optimal conditions and (b) the conditions are not controlled, so any design problems are difficult to characterize. Any change in the spectral content of direct-beam sunlight as it passes through the concentrator optics is of particular interest, as it can reduce the performance of multijunction cells and is difficult to characterize.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy Solar Energy Program
OSTI Identifier:
1120998
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: High and Low Concentration for Solar Electric Applications II: Proceedings of the SPIE Optics and Photonics Conference, 26-30 August 2007, San Diego, California; Proceedings of SPIE Vol. 6649
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 42 ENGINEERING; PV; MULTI-JUNCTION SOLAR CELL; CONCENTRATOR MODULE; CURRENT-MATCHING; FILL FACTOR; Solar Energy - Photovoltaics

Citation Formats

McMahon, W. E., Emery, K. E., Friedman, D. J., Ottoson, L., Young, M. S., Ward, J. S., Kramer, C. M., Duda, A., and Kurtz, S. Daily Fill Factor Variation as a Diagnostic Probe of Multijunction Concentrator Systems During Outdoor Operation. United States: N. p., 2007. Web.
McMahon, W. E., Emery, K. E., Friedman, D. J., Ottoson, L., Young, M. S., Ward, J. S., Kramer, C. M., Duda, A., & Kurtz, S. Daily Fill Factor Variation as a Diagnostic Probe of Multijunction Concentrator Systems During Outdoor Operation. United States.
McMahon, W. E., Emery, K. E., Friedman, D. J., Ottoson, L., Young, M. S., Ward, J. S., Kramer, C. M., Duda, A., and Kurtz, S. Mon . "Daily Fill Factor Variation as a Diagnostic Probe of Multijunction Concentrator Systems During Outdoor Operation". United States. doi:.
@article{osti_1120998,
title = {Daily Fill Factor Variation as a Diagnostic Probe of Multijunction Concentrator Systems During Outdoor Operation},
author = {McMahon, W. E. and Emery, K. E. and Friedman, D. J. and Ottoson, L. and Young, M. S. and Ward, J. S. and Kramer, C. M. and Duda, A. and Kurtz, S.},
abstractNote = {The work presented here is for GaInP2/GaAs tandem cells, but the conclusions are equally valid for GaInP2/GaAs/Ge triple-junction cells. Optimizing a concentrator system which uses multijunction solar cells is challenging because: (a) the conditions are variable, so the solar cells rarely operate under optimal conditions and (b) the conditions are not controlled, so any design problems are difficult to characterize. Any change in the spectral content of direct-beam sunlight as it passes through the concentrator optics is of particular interest, as it can reduce the performance of multijunction cells and is difficult to characterize.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
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