Towards coloured glazed thermal solar collectors

Multilayers of TiO 2 and SiO 2 dielectric coatings deposited by reactive sputtering have been characterized by X-ray photoelectron spectroscopy, in situ real-time laser reflectometry, spectroscopic ellipsometry and spectrophotometry. Measurements have been performed on individual dielectric layers o...

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Bibliographic Details
Published in:Solar energy materials and solar cells 2004-10, Vol.84 (1), p.225-239
Main Authors: Boudaden, J., Ho, R.S.-C., Oelhafen, P., Schüler, A., Roecker, C., Scartezzini, J.-L.
Format: Article
Language:English
Subjects:
Dielectic oxides
Multilayers
Thermal solar collectors
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Summary:Multilayers of TiO 2 and SiO 2 dielectric coatings deposited by reactive sputtering have been characterized by X-ray photoelectron spectroscopy, in situ real-time laser reflectometry, spectroscopic ellipsometry and spectrophotometry. Measurements have been performed on individual dielectric layers of TiO 2, SiO 2 and multilayers. The experiments show a good agreement between the different techniques. Optical properties can be modelled properly using a Cauchy dispersion model. The optical constants of an individual layer are confirmed by the optical measurements on more complex multilayer structures. Reflectivity of the three-layer films fulfils the requirements for a first step towards coloured glazed thermal solar collectors.
ISSN:0927-0248
1879-3398
DOI:10.1016/j.solmat.2004.02.042