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Proceedings Paper

Aluminum thin reflective films for evacuated CPC-type collectors
Author(s): Clarisse M. Nunes; Joao Farinha Mendes; Manuel Collares-Pereira; M. P. Maneira
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Paper Abstract

The efficiency of low concentration CPC type collectors depends greatly on the quality of the reflecting films used in the case of evacuated glass tub, specially shaped to become a low concentration CPC type collector, it is of great importance to have a mirror of good quality, namely with good reflectivity and adhesion as well as low degasing of the deposited films. In this paper a technique to obtain such reflecting film is described. Magnetron sputtering of an aluminum post cathode was used. Several configurations were tested and the design was optimized taking into account both discharge stability and industrial constraints, like equipment volume and energy consumption. Discharge characteristic, deposition rate and general features are shown. Film reflectivity dependence on discharge pressure is discussed. The results obtained are encouraging and foreseen to be easily industrialized.

Paper Details

Date Published: 9 September 1994
PDF: 9 pages
Proc. SPIE 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, (9 September 1994); doi: 10.1117/12.185401
Show Author Affiliations
Clarisse M. Nunes, INETI-DER (Portugal)
Joao Farinha Mendes, INETI-DER (Portugal)
Manuel Collares-Pereira, INETI-DER (Portugal)
M. P. Maneira, FCT/UNL (Portugal)


Published in SPIE Proceedings Vol. 2255:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII
Volker Wittwer; Claes G. Granqvist; Carl M. Lampert, Editor(s)

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