Mg-Ti-H thin films as switchable solar absorbers

A. Baldi, D.M. Borsa, H. Schreuders, J.H. Rector, T. Atmakidis, M.J.W. Bakker, H. A. Zondag, W. G. J. van Helden, B. Dam, R.P. Griessen

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The reflection and transmission spectra of Pd capped MgyTi1-y thin films (y = 0.7, 0.8 and 0.9) are measured in the 0.5-5.5 eV energy range, both in the as-prepared and hydrogenated states. Upon hydrogenation these films switch reversibly from a shiny metallic state into a "black" absorbing one. The composition and thicknesses can be tailored to achieve high solar absorptance and low thermal emittance in the hydrogenated state. The combination of these two characteristics is interesting for the application of this material as switchable absorber in solar collectors. The use of a MgyTi1-y switchable absorber in solar collectors allows to lower the stagnation temperature from 180 to 80 degrees C. The collector efficiency is affected only minimally. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)3188-3192
Number of pages5
JournalInternational Journal of Hydrogen Energy
Volume33
Issue number12
DOIs
Publication statusPublished - Jun 2008

Bibliographical note

Times Cited: 4 2nd World Congress of Young Scientists on Hydrogen Energy JUN 06-08, 2007 Turin, ITALY

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