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Light trapping in ultrathin silicon photonic crystal superlattices with randomly-textured dielectric incouplers

Callahan, Dennis M. and Horowitz, Kelsey A. W. and Atwater, Harry A. (2013) Light trapping in ultrathin silicon photonic crystal superlattices with randomly-textured dielectric incouplers. Optics Express, 21 (25). pp. 30315-30326. ISSN 1094-4087. doi:10.1364/OE.21.030315. https://resolver.caltech.edu/CaltechAUTHORS:20140117-082042199

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Abstract

We report here several different superlattice photonic crystal based designs for 200nm thick c-Si solar cells, demonstrating that these structures have the ability to increase broadband absorption from λ = 300nm to 1100nm by more than 100% compared to a planar cell with an optimized anti-reflection coating. We show that adding superlattices into photonic crystals introduces new optical modes that contribute to enhanced absorption. The greatest improvements are obtained when combining a superlattice photonic crystal with a randomly textured dielectric coating that improves incoupling into the modes of the absorbing region. Finally, we show that our design methodology is also applicable to layers 1 to 4 microns in thickness, where absorbed currents competitive with conventional thick Si solar cells may be achieved.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1364/OE.21.030315DOIArticle
http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-21-25-30315PublisherArticle
ORCID:
AuthorORCID
Atwater, Harry A.0000-0001-9435-0201
Additional Information:© 2013 Optical Society of America. Received 22 Aug 2013; revised 5 Nov 2013; accepted 21 Nov 2013; published 3 Dec 2013. D. M. C. acknowledges the Department of Energy Basic Energy Sciences, Office of Science through the ‘Light Material Interactions Energy Frontier Research Center’ under contract number DE-SC0001293. K. A. W. H. acknowledges the Bay Area Photovoltaic Consortium under award number DE-EE0004946 and a graduate research fellowship from the National Science Foundation.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0001293
Department of Energy (DOE)DE-EE0004946
NSF Graduate Research FellowshipUNSPECIFIED
Bay Area Photovoltaic ConsortiumUNSPECIFIED
Issue or Number:25
Classification Code:OCIS codes: (350.4238) Nanophotonics and photonic crystals; (350.6050) Solar energy; (050.5298) Photonic crystals
DOI:10.1364/OE.21.030315
Record Number:CaltechAUTHORS:20140117-082042199
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140117-082042199
Official Citation:D. Callahan, K. Horowitz, and H. Atwater, "Light trapping in ultrathin silicon photonic crystal superlattices with randomly-textured dielectric incouplers," Opt. Express 21, 30315-30326 (2013)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:43420
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:17 Jan 2014 17:10
Last Modified:10 Nov 2021 16:37

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