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Energy Express

  • Editor: Bernard Kippelen
  • Vol. 20, Iss. S4 — Jul. 2, 2012
  • pp: A496–A501

Light trapping limits in plasmonic solar cells: an analytical investigation

Xing Sheng, Juejun Hu, Jurgen Michel, and Lionel C. Kimerling  »View Author Affiliations


Optics Express, Vol. 20, Issue S4, pp. A496-A501 (2012)
http://dx.doi.org/10.1364/OE.20.00A496


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Abstract

We analytically investigate the light trapping performance in plasmonic solar cells with Si/metallic structures. We consider absorption enhancements for surface plasmon polaritons (SPPs) at planar Si/metal interfaces and localized surface plasmon resonances (LSPRs) for metallic spheres in a Si matrix. We discover that the enhancement factors at Si/metal interfaces are not bound to the conventional Lambertian limit, and strong absorption can be achieved around plasmonic resonant frequencies. In addition, those enhancements are greatly reduced as the fields decay away from the Si/metal interfaces. Therefore, localized plasmonic resonances can be used as efficient light trapping schemes for ultrathin Si solar cells (< 50 nm), while photonic guided mode enhancement is more appropriate for thicker films.

© 2012 OSA

OCIS Codes
(040.5350) Detectors : Photovoltaic
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Photovoltaics

History
Original Manuscript: January 23, 2012
Revised Manuscript: April 3, 2012
Manuscript Accepted: May 22, 2012
Published: May 25, 2012

Citation
Xing Sheng, Juejun Hu, Jurgen Michel, and Lionel C. Kimerling, "Light trapping limits in plasmonic solar cells: an analytical investigation," Opt. Express 20, A496-A501 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-S4-A496


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