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Solar cell efficiency enhancement via light trapping in printable resonant dielectric nanosphere arrays

Grandidier, Jonathan and Weitekamp, Raymond A. and Deceglie, Michael G. and Callahan, Dennis M. and Battaglia, Corsin and Bukowsky, Colton R. and Ballif, Christophe and Grubbs, Robert H. and Atwater, Harry A. (2013) Solar cell efficiency enhancement via light trapping in printable resonant dielectric nanosphere arrays. Physica Status Solidi A, 210 (2). pp. 255-260. ISSN 0031-8965. doi:10.1002/pssa.201228690.

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Resonant dielectric structures are a promising platform for addressing the key challenge of light trapping in thin-film solar cells. We experimentally and theoretically demonstrate efficiency enhancements in solar cells from dielectric nanosphere arrays. Two distinct amorphous silicon photovoltaic architectures were improved using this versatile light-trapping platform. In one structure, the colloidal monolayer couples light into the absorber in the near-field acting as a photonic crystal light-trapping element. In the other, it acts in the far-field as a graded index antireflection coating to further improve a cell which already included a state-of-the-art random light-trapping texture to achieve a conversion efficiency over 11%. For the near-field flat cell architecture, we directly fabricated the colloidal monolayer on the device through Langmuir–Blodgett deposition in a scalable process that does not degrade the active material. In addition, we present a novel transfer printing method, which utilizes chemical crosslinking of an optically thin adhesion layer to tether sphere arrays to the device surface. The minimally invasive processing conditions of this transfer method enable the application to a wide range of solar cells and other optoelectronic devices. False-color SEM image of an amorphous silicon solar cell with resonant spheres on top.

Item Type:Article
Related URLs:
URLURL TypeDescription
Grandidier, Jonathan0000-0002-3384-6083
Battaglia, Corsin0000-0002-5003-1134
Bukowsky, Colton R.0000-0003-3577-8050
Ballif, Christophe0000-0001-8989-0545
Grubbs, Robert H.0000-0002-0057-7817
Atwater, Harry A.0000-0001-9435-0201
Additional Information:© 2013 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Received 5 October 2012; revised 24 October 2012; accepted 24 October 2012; Published online 22 November 2012. The authors wish to thank A. J. Leenheer. A. Mihi. P. V. Braun, M. Charrière. and K Söderström for useful technical input. The work at Caltech was supported by the "Light-Material Interactions in Energy Conversion" Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001293. The work at EPFL was supported by the Swiss Federal Energy Office. RAW thanks the Resnick Sustainability Institute for a graduate fellowship.
Group:Resnick Sustainability Institute
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0001293
Swiss Federal Energy OfficeUNSPECIFIED
Resnick Sustainability InstituteUNSPECIFIED
Subject Keywords:amorphous silicon; nanospheres; photonic crystal; photovoltaics; resonant dielectric structures; solar cells
Issue or Number:2
Record Number:CaltechAUTHORS:20130424-160158368
Persistent URL:
Official Citation:Grandidier, J., Weitekamp, R. A., Deceglie, M. G., Callahan, D. M., Battaglia, C., Bukowsky, C. R., Ballif, C., Grubbs, R. H. and Atwater, H. A. (2013), Solar cell efficiency enhancement via light trapping in printable resonant dielectric nanosphere arrays. Phys. Status Solidi A, 210: 255–260. doi: 10.1002/pssa.201228690
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38108
Deposited On:25 Apr 2013 14:56
Last Modified:09 Nov 2021 23:33

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