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Proceedings Paper

In silico design of metal-dielectric nanocomposites for solar energy applications
Author(s): Justin Trice; Hernando Garcia; Radhakrishna Sureshkumar; Ramki Kalyanaraman
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Paper Abstract

Recently, a homogenization procedure has been proposed, based on the tight lower bounds of the Bergman- Milton formulation, and successfully applied to dilute ternary nanocomposites to predict optical data without using any fitting parameters [Garcia et al. Phys. Rev. B, 75, 045439 (2007)]. The procedure has been extended and applied to predict the absorption coefficient of a quaternary nanocomposite consisting of Cu, Ag, and Au nanospheres embedded in a SiO2 host matrix. Significant enhancement of the absorption coefficient is observed over the spectral range 350-800 nm. The magnitude of this enhancement can be controlled by varying the nanosphere diameter and the individual metal volume fraction with respect to the host matrix. We have determined the optimal composition resulting in enhanced broadband (350nm-800nm) absorption of the solar spectrum using a simulated annealing algorithm. Fabricating such composite materials with a desired optical absorption has potential applications in solar energy harvesting.

Paper Details

Date Published: 10 September 2007
PDF: 8 pages
Proc. SPIE 6648, Instrumentation, Metrology, and Standards for Nanomanufacturing, 66480L (10 September 2007); doi: 10.1117/12.734531
Show Author Affiliations
Justin Trice, Washington Univ. in St. Louis (United States)
Hernando Garcia, Southern Illinois Univ. (United States)
Radhakrishna Sureshkumar, Washington Univ. in St. Louis (United States)
Ramki Kalyanaraman, Washington Univ. in St. Louis (United States)

Published in SPIE Proceedings Vol. 6648:
Instrumentation, Metrology, and Standards for Nanomanufacturing
Michael T. Postek; John A. Allgair, Editor(s)

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