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Spectrum splitting photovoltaics: Light trapping filtered concentrator for ultrahigh photovoltaic efficiency

Kosten, Emily D. and Lloyd, John and Warmann, Emily and Atwater, Harry A. (2013) Spectrum splitting photovoltaics: Light trapping filtered concentrator for ultrahigh photovoltaic efficiency. In: IEEE 39th Photovoltaic Specialists Conference. IEEE , Piscataway, NJ, pp. 3053-3057. ISBN 978-1-4799-3299-3.

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We investigate a spectrum splitting approach where light is trapped in a textured dielectric slab and coupled into underlying solar cells of different bandgaps through filters. We describe a specific design featuring an SiO_2 textured slab coated with angle restricting incoupling elements and four underlying dual junction subcells, based on light trapping and efficiency considerations. We then design a full set of four omnidirectional filters based on aperiodic dielectric multilayer films to split the light entering each subcell into spectral bands tuned to the cell bandgaps. Based on the calculated filter performance, we estimate a receiver efficiency of 45% with this initial design.

Item Type:Book Section
Related URLs:
URLURL TypeDescription DOIArticle
Warmann, Emily0000-0002-2810-4608
Atwater, Harry A.0000-0001-9435-0201
Additional Information:© 2013 IEEE. This project was supported by the Dow Chemical Company and the DOE ‘Light-Material Interactions in Energy Conversion’ Energy Frontier Research Center under grant DESC0001293. E. Kosten is supported by the Resnick Institute Graduate Fellowship. The authors wish to thank M. Escarra, C. Eisler, S. Darbe, and C. Flowers for helpful discussions and comments on the manuscript.
Group:Resnick Sustainability Institute
Funding AgencyGrant Number
Dow Chemical CompanyUNSPECIFIED
Department of Energy (DOE)DE-SC0001293
Resnick Sustainability InstituteUNSPECIFIED
Subject Keywords:photovoltaic cells, optical filters, geometrical optics, III-V semiconductor materials, photonic crystals
Record Number:CaltechAUTHORS:20140918-140006156
Persistent URL:
Official Citation:Kosten, E.D.; Lloyd, J.; Warmann, E.; Atwater, H.A, "Spectrum splitting photovoltaics: Light trapping filtered concentrator for ultrahigh photovoltaic efficiency," Photovoltaic Specialists Conference (PVSC), 2013 IEEE 39th , vol., no., pp.3053,3057, 16-21 June 2013 doi: 10.1109/PVSC.2013.6745105 URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49830
Deposited By: Tony Diaz
Deposited On:18 Sep 2014 21:36
Last Modified:10 Nov 2021 18:48

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