Palestine Technical University Research Journal

Article Title

Influence of Aging, Poisoning and Residual Charges on the Gasochromic Behavior of WO3 Thin Films


Hussein Shanak


Thin films of WO3 were deposited in a mixed atmosphere of O2 and Ar gas from a high purity target of 99.99 % tungsten using reactive DC-sputtering technique. Pt catalyst was sputtered on top of the WO3 films from a high purity target of 99.99 % platinum in Ar atmosphere. Coloration takes place in hydrogen gas and bleaching in oxygen gas. During the Coloration/bleaching process several optical and electrical parameters were determined. The influence of the aging time and poisoning in air was investigated, and the residual charges resulting from the coloring/bleaching processes were discussed. It was found that gasochromic coloration velocity decreases with increasing aging time.

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