Concentrating optical system optimization for 3- and 4-junction solar cells: impact of illumination profiles

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dc.contributor.authorSharma, Pratibha
dc.contributor.authorWilkins, Matthew
dc.contributor.authorSchriemer, Henry
dc.contributor.authorHinzer, Karin
dc.date.accessioned2017-01-17T20:46:42Z
dc.date.available2017-01-17T20:46:42Z
dc.date.issued2017-01-12
dc.identifier.citationPratibha Sharma, Matthew M. Wilkins, Henry P. Schriemer, Karin Hinzer, “Concentrating optical system optimization for 3- and 4-junction solar cells: impact of illumination profiles,” J. Photon. Energy 7(1), 014501 (2017), doi: 10.1117/1.JPE.7.014501
dc.identifier.urihttp://photonicsforenergy.spiedigitallibrary.org/article.aspx?articleid=2598579
dc.identifier.urihttp://hdl.handle.net/10393/35719
dc.description.abstractOptical component designs for concentrating photovoltaic systems with three different multijunction solar cells (MJSCs) are optimized to yield maximum system efficiencies under standard test conditions, specifically uniform illumination. Optimization uses an integrated optoelectrical approach with ray tracing of the optical train to generate an irradiance profile for input to the cell’s distributed circuit model. These cells, a three-junction lattice-matched (3JLM) solar cell, a three-junction lattice-mismatched inverted metamorphic (3JIMM) solar cell, and a four junction lattice-matched (4JLM) solar cell, were individually designed for maximum efficiency at 1000×. The optical train introduces losses, modifies the spectrum, and produces a spatially nonuniform profile across the cell. We decouple spectral modification from spatial nonuniformity to separately determine their individual impacts on system efficiencies, finding the optimal set of optical design parameters for each case. Spectral modification yields modest loss penalties (from 1.0% to 1.6%, relative to the MJSC), but the impact of nonuniformity is more significant and cell dependent, with relative loss penalties of 1.1%, 3.8%, and 2.3%, for 3JLM, 3JIMM, and 4JLM, respectively. While spectral modification does not significantly impact design parameters, spatial nonuniformity does, with absolute losses of 1% and 3.4% if 3JIMM and 4JLM cells are used in a 3JLM optimized system, respectively.
dc.language.isoen
dc.subjectconcentrated PV
dc.subjectmodeling
dc.subjectmultijunction
dc.subjectsolar
dc.subjectnonuniform illumination
dc.subjectspectral variations
dc.titleConcentrating optical system optimization for 3- and 4-junction solar cells: impact of illumination profiles
dc.typeArticle
dc.identifier.doi10.1117/1.JPE.7.014501
CollectionScience informatique et génie électrique // Electrical Engineering and Computer Science

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