Surface Plasmon Enhancement of Optical Absorption in Thin-Film Silicon Solar Cells |
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Authors: | Yu A Akimov K Ostrikov E P Li |
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Institution: | (1) Advanced Photonics and Plasmonics Group, Institute of High Performance Computing, 1 Fusionopolis Way, #16-16 Connexis, Singapore, 138632, Singapore;(2) CSIRO Materials Science and Engineering, P. O. Box 218, Lindfield, New South Wales, 2070, Australia;(3) Plasma Nanoscience and Nanoplasmonics, School of Physics, The University of Sydney, Sydney, New South Wales, 2006, Australia |
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Abstract: | Strong electromagnetic field enhancement that occurs under conditions of the surface plasmon excitation in metallic nanoparticles
deposited on a semiconductor surface is a very efficient and promising tool for increasing the optical absorption within semiconductor
solar cells and, hence, their photocurrent response. The enhancement of the optical absorption in thin-film silicon solar
cells via the excitation of localized surface plasmons in spherical silver nanoparticles is investigated. Using the effective
medium model, the effect of the nanoparticle size and the surface coverage on that enhancement is analyzed. The optimum configuration
and the nanoparticle parameters leading to the maximum enhancement in the optical absorption and the photocurrent response
in a single p-n junction silicon cell are obtained. The effect of coupling between the silicon layer and the surface plasmon fields on the
efficiency of the above enhancement is quantified as well. |
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Keywords: | Surface plasmons Solar cells Silicon Nanoparticles Effective medium |
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