Sputtered solar absorber coatings with high-spectral selectivity and good durability

Wolfgang Graf; Franz Brucker; Michael Koehl; Thomas Troescher; Volker Wittwer; Rolf Blessing; Lothar Herlitze

doi:10.1117/12.217337

23 August 1995 Sputtered solar absorber coatings with high-spectral selectivity and good durability

Wolfgang Graf, Franz Brucker, Michael Koehl, Thomas Troescher, Volker Wittwer, Rolf Blessing, Lothar Herlitze

Proceedings Volume 2531, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIV; (1995) https://doi.org/10.1117/12.217337
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Sputtering is a well established coating technology for glass panes. This technology is also interesting for the production of selective solar absorber coatings because the environmental impact is much less than for electroplating. There are already several sputtered absorber coatings for evacuated tubular collectors existing on the market. The application in ventilated collectors requires better durability of the absorbers and a technology which can be applied to planar substrates. The coatings presented here are produced by dc-magnetron sputtering. The maximum sample size was 2 m multiplied by 3 m. A thermal emittance (at 373 K) below 5% was achieved together with a solar absorptance (AM 1.5) above 90%. The coating is deposited directly onto copper sheets without the commonly used anti-corrosion nickel coating in between. The durability of the absorbers was found to be sufficient for the application in ventilated flat-plate collectors containing moisture according to the tests and requirements proposed by Task X of the Solar Heating and Cooling Programme of the International Energy Agency.

Citation Download Citation

Wolfgang Graf, Franz Brucker, Michael Koehl, Thomas Troescher, Volker Wittwer, Rolf Blessing, and Lothar Herlitze "Sputtered solar absorber coatings with high-spectral selectivity and good durability", Proc. SPIE 2531, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIV, (23 August 1995); https://doi.org/10.1117/12.217337

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available