Aluminum thin reflective films for evacuated CPC-type collectors

Clarisse M. Nunes; Joao Farinha Mendes; Manuel Collares-Pereira; M. P. Maneira

doi:10.1117/12.185401

9 September 1994 Aluminum thin reflective films for evacuated CPC-type collectors

Clarisse M. Nunes, Joao Farinha Mendes, Manuel Collares-Pereira, M. P. Maneira

Proceedings Volume 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII; (1994) https://doi.org/10.1117/12.185401
Event: Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, 1994, Freiburg, Germany

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.

Citation Download Citation

Clarisse M. Nunes, Joao Farinha Mendes, Manuel Collares-Pereira, and M. P. Maneira "Aluminum thin reflective films for evacuated CPC-type collectors", Proc. SPIE 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, (9 September 1994); https://doi.org/10.1117/12.185401

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