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Rugate filter for light-trapping in solar cells

Fahr, S.; Ulbrich, C.; Kirchartz, T.; Rau, U.; Rockstuhl, C.; Lederer, F.


We suggest a design for a coating that could be applied on top of any solar cell having at least one diffusing surface. This coating acts as an angle and wavelength selective filter, which increases the average path length and absorptance at long wavelengths without altering the solar cell performance at short wavelengths. The filter design is based on a continuous variation of the refractive index in order to minimize undesired reflection losses. Numerical procedures are used to optimize the filter for a 10 μm thick monocrystalline silicon solar cell, which lifts the efficiency above the Auger limit for unconcentrated illumination. The feasibility to fabricate such filters is also discussed, considering a finite available refractive index range.

Verlagsausgabe §
DOI: 10.5445/IR/1000040825
Veröffentlicht am 09.05.2018
DOI: 10.1364/OE.16.009332
Zitationen: 67
Web of Science
Zitationen: 56
Zitationen: 59
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Theoretische Festkörperphysik (TFP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2008
Sprache Englisch
Identifikator ISSN: 1094-4087
KITopen-ID: 1000040825
Erschienen in Optics express
Verlag Optica Publishing Group (OSA)
Band 16
Heft 13
Seiten 9332-9343
Schlagwörter Photovoltaic, Concentrators, Multilayers, Thin films, Filters, interference, Solar energy
Nachgewiesen in Dimensions
Web of Science
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