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Proceedings Paper

Regular and random surface microstructures as antireflection coatings for solar absorbers
Author(s): A. Borne; Andreas Gombert; Wolfgang Graf; Michael Koehl; Volker Wittwer
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Paper Abstract

Broadband antireflection coatings can be made from multi-layer stacks or by microstructuring the surface. One approach for microstructuring is to prepare random rough surfaces by sputtering or evaporation technology. A second is the production of periodic holographic double gratings, so-called `moth eyes' with spatial periods of less than 1 micrometers . The effect of these two possibilities on the solar absorptance is demonstrated by the example of cermet solar absorber coatings.

Paper Details

Date Published: 25 November 1992
PDF: 9 pages
Proc. SPIE 1727, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Selective Materials, Concentrators and Reflectors, Transparent Insulation and Superwindows, (25 November 1992); doi: 10.1117/12.130508
Show Author Affiliations
A. Borne, Fraunhofer-Institut fuer Solare Energiesysteme (Germany)
Andreas Gombert, Fraunhofer-Institut fuer Solare Energiesysteme (Germany)
Wolfgang Graf, Fraunhofer-Institut fuer Solare Energiesysteme (Germany)
Michael Koehl, Fraunhofer-Institut fuer Solare Energiesysteme (Germany)
Volker Wittwer, Fraunhofer-Institut fuer Solare Energiesysteme (Germany)


Published in SPIE Proceedings Vol. 1727:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Selective Materials, Concentrators and Reflectors, Transparent Insulation and Superwindows

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