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Proceedings Paper

Tuning plasma frequency for improved solar control glazing using mesoporous nanostructures
Author(s): Geoff B. Smith; Abbas Maaroof; Annette Dowd; Angus Gentle; Michael Cortie
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Paper Abstract

The role of the plasma frequency ωp of conductors in their use for various solar energy and energy efficiency tasks, especially in transparent solar control window coatings, is analysed for a range of materials including noble and other metals, transparent compound conductors and the metallic phase of VO2. Ways of adjusting ωp for improved functionality are considered, including novel mesoporous metals and composites that can have an "apparent" or effective plasma frequency. While high ωp is needed for high thermal infra-red (IR) reflectance and strong surface plasmon resonant absorption, it is not the only requirement. The location of inter-band terms relative to ωp and the solar infra-red, effective bandwidth, and a high relaxation frequency can each alter these responses substantially. Two materials with elevated carrier relaxation rates, in one case when intrinsic, and in another due to mesostructure, are used to demonstrate this impact. Solar control and visible performance of a mesoporous gold film is analysed.

Paper Details

Date Published: 12 May 2006
PDF: 9 pages
Proc. SPIE 6197, Photonics for Solar Energy Systems, 61970T (12 May 2006); doi: 10.1117/12.661198
Show Author Affiliations
Geoff B. Smith, Univ. of Technology, Sydney (Australia)
Abbas Maaroof, Univ. of Technology, Sydney (Australia)
Annette Dowd, Univ. of Technology, Sydney (Australia)
Angus Gentle, Univ. of Technology, Sydney (Australia)
Michael Cortie, Univ. of Technology, Sydney (Australia)

Published in SPIE Proceedings Vol. 6197:
Photonics for Solar Energy Systems
Andreas Gombert, Editor(s)

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