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Optimization of a structured selective coating

Authors
Journal
Thin Solid Films
0040-6090
Publisher
Elsevier
Publication Date
Volume
135
Issue
1
Identifiers
DOI: 10.1016/0040-6090(86)90085-4

Abstract

Abstract The spectral selectivity and optical properties of a structured (multilayer) coating comprising an anodized porous Al 2O 3 film sequentially impregnated with zinc and nickel on an aluminium substrate were theoretically investigated employing the effective media concept and using the Maxwell Garnett and Bruggeman approaches to determine the dielectric constant of the constituent inhomogeneous layers. The best performance of this structured selective coating for solar energy applications is indicated for a porous Al 2O 3 film 0.135 μm thick and zinc- and nickel-impregnated layers with thicknesses of 0.020 μm and 0.005 μm respectively.

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