NDLI: Optimization of three and four junction solar cell CPV systems using ray tracing and SPICE modeling

Content Provider	IEEE Xplore Digital Library
Author	Sharma, P. Wilkins, M. Schriemer, H. Hinzer, K.
Copyright Year	2015
Description	Author affiliation: SUNLAB, Univ. of Ottawa, Ottawa, ON, Canada (Sharma, P.; Wilkins, M.; Schriemer, H.; Hinzer, K.)
Abstract	Concentrating optics generally produce spatially and spectrally non-uniform optical profiles across the multijunction solar cells typically used in a concentrator photovoltaic (CPV) systems, degrading fill factors and thereby reducing module efficiencies. These effects maybe more pronounced if the primary-to-secondary distance is sub-optimal and if the system does not track the sun accurately. We integrate ray tracing with a distributed equivalent circuit model to simulate the performance of a three and four junction solar cells under a Fresnel-lens-based CPV system of 1250X geometric concentration. The impact on system efficiency of varying the primary-to-secondary distance is evaluated. Our results indicate a relative enhancement of 11.5 % for the triple junction lattice matched, 9.2% for the triple junction inverted metamorphic design and 8% for the four junction lattice matched design when we optimize the primary-to-secondary distance based on an integrated systems approach using the full optical distribution as an input to a 2-D distributed equivalent circuit model of the MJSC, as opposed to a uniform profile 1-D treatment.
Starting Page	1
Ending Page	6
File Size	4040383
Page Count	6
File Format	PDF
e-ISBN	9781479979448
DOI	10.1109/PVSC.2015.7356184
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-06-14
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Junctions Photovoltaic cells Integrated circuit modeling Lattices Equivalent circuits Optical design Optical reflection triple junction chromatic aberrations concentrated four junction photovoltaic cells
Content Type	Text
Resource Type	Article

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