Tuning plasma frequency for improved solar control glazing using mesoporous nanostructures

Geoff B. Smith; Abbas Maaroof; Annette Dowd; Angus Gentle; Michael Cortie

doi:10.1117/12.661198

12 May 2006 Tuning plasma frequency for improved solar control glazing using mesoporous nanostructures

Geoff B. Smith, Abbas Maaroof, Annette Dowd, Angus Gentle, Michael Cortie

Proceedings Volume 6197, Photonics for Solar Energy Systems; 61970T (2006) https://doi.org/10.1117/12.661198
Event: SPIE Photonics Europe, 2006, Strasbourg, France

Abstract

The role of the plasma frequency ω_p 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 ω_p for improved functionality are considered, including novel mesoporous metals and composites that can have an "apparent" or effective plasma frequency. While high ω_p 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 ω_p 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.

Citation Download Citation

Geoff B. Smith, Abbas Maaroof, Annette Dowd, Angus Gentle, and Michael Cortie "Tuning plasma frequency for improved solar control glazing using mesoporous nanostructures", Proc. SPIE 6197, Photonics for Solar Energy Systems, 61970T (12 May 2006); https://doi.org/10.1117/12.661198

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