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Configuration optimization of a nanosphere array on top of a thin film solar cell

Grandidier, J. and Callahan, D. M. and Atwater, H. A. (2012) Configuration optimization of a nanosphere array on top of a thin film solar cell. In: 38th IEEE Photovoltaic Specialists Conference. IEEE , Piscataway, NJ, pp. 3325-3327. ISBN 978-1-4673-0064-3.

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Resonant dielectric structures placed on top of a solar cell can enhance light absorption and therefore increase its efficiency. Freely propagating sunlight diffractively couples into the resonant modes of a low loss sphere array. We numerically demonstrate this enhancement using 3D full field finite difference time domain simulations. The coupled energy is then transferred into the active layer underneath and significantly contributes to increase the calculated photocurrent of the solar cell. On a typical thin film amorphous silicon solar cell, a parametric analysis is done. For a hexagonally close packed sphere configuration, we vary the size of the spheres as well as the type of material used. Finally, we study a configuration where high index spheres are embedded in a lower index polymer. This last configuration has the advantage that it can easily be integrated upon solar cell fabrication.

Item Type:Book Section
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URLURL TypeDescription
Grandidier, J.0000-0002-3384-6083
Atwater, H. A.0000-0001-9435-0201
Additional Information:© 2011 IEEE. Date of Current Version: 04 October 2012. One of us (DMC) acknowledges the Office of Basic Energy Sciences under Contract No. DE-FG02-07ER46405 and two of us (JG and HAA) acknowledge the Department of Energy Basic Energy Sciences, Office of Science through the Light Material Interactions Energy Frontier Research Center under contract number DE-SC0001293.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-07ER46405
Department of Energy (DOE)DE-SC0001293
Subject Keywords:Nanospheres, Whispering gallery modes, Photovoltaic systems, amorphous silicon
Record Number:CaltechAUTHORS:20121010-161030164
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Official Citation:Grandidier, J.; Callahan, D. M.; Atwater, H. A.; , "Configuration optimization of a nanosphere array on top of a thin film solar cell," Photovoltaic Specialists Conference (PVSC), 2012 38th IEEE , vol., no., pp.003325-003327, 3-8 June 2012 doi: 10.1109/PVSC.2012.6318285 URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:34836
Deposited By: Tony Diaz
Deposited On:11 Oct 2012 18:44
Last Modified:09 Nov 2021 23:10

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