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Surface plasmon enhanced photocurrent in thin GaAs solar cells

Nakayama, Keisuke and Tanabe, Katsuaki and Atwater, Harry A. (2008) Surface plasmon enhanced photocurrent in thin GaAs solar cells. In: Nanoscale Photonic and Cell Technologies for Photovoltaics. Proceedings of SPIE. No.7047. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 704708. ISBN 9780819472670.

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We report fabrication of size-controlled plasmonic nanoparticle arrays by which optically thin GaAs single junction solar cells are decorated. Ordered Ag and Al nanoparticles with average diameters of 60-150 nm and interparticle spacings of 100-300 nm were templated onto the window layers of the GaAs solar cells using nanoporous anodic aluminum oxide membrane templates. Near the surface plasmon resonances, 60nm-diameter Ag and Al nanoparticles serve as light-absorbers so that non-radiative surface plasmon resonances reduce the photocurrent of the cells, which is improved by increasing the nanoparticle size. Photocurrent enhancements are seen at wavelengths longer than surface plasmon resonance which is maximized near the band gap edge of GaAs. These enhancements can be attributed to the increased optical path in the photovoltaic layers resulting from multi-angle scattering by the nanoparticles, while high scattering efficiency nanoparticles in turn increase the back scattering light out of the cell reducing the photocurrent.

Item Type:Book Section
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Atwater, Harry A.0000-0001-9435-0201
Additional Information:© 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). This work was supported by the Department of Energy, Basic Energy Sciences under grant DE-FG02-07ER46405, and Nippon Oil Corporation. We also acknowledge support from the Center for Science and Engineering of Materials (CSEM), an NSF Material Research Science and Engineering Center at Caltech, for facilities use.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-07ER46405
Nippon Oil CorporationUNSPECIFIED
Subject Keywords:plasmonic nanoparticle, Ag, Al, anodic aluminum oxide, GaAs solar cel
Series Name:Proceedings of SPIE
Issue or Number:7047
Record Number:CaltechAUTHORS:20180706-140504826
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Official Citation:Keisuke Nakayama, Katsuaki Tanabe, Harry A. Atwater, "Surface plasmon enhanced photocurrent in thin GaAs solar cells", Proc. SPIE 7047, Nanoscale Photonic and Cell Technologies for Photovoltaics, 704708 (11 September 2008); doi: 10.1117/12.795469;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87609
Deposited By: George Porter
Deposited On:09 Jul 2018 15:08
Last Modified:15 Nov 2021 20:49

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