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The effect of water on the electrochromic properties of WO3 films prepared by vacuum and chemical methods

Papaefthimiou Spiros, P. Yianoulis, G. Leftheriotis

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URIhttp://purl.tuc.gr/dl/dias/A052A8C8-2E9B-41ED-BCDA-D8AEA1563296-
Identifierhttps://doi.org/10.1016/j.solmat.2004.02.019-
Identifierhttp://www.sciencedirect.com/science/article/pii/S0927024804001059-
Languageen-
TitleThe effect of water on the electrochromic properties of WO3 films prepared by vacuum and chemical methodsen
CreatorPapaefthimiou Spirosen
CreatorΠαπαευθυμιου Σπυριδωνel
CreatorP. Yianoulisen
CreatorG. Leftheriotisen
PublisherElsevieren
Content SummaryWe present a comparative study on the effect of absorbed water on the properties of tungsten oxide films prepared by two different methods (e-gun evaporation, and an aqueous sol–gel technique). Scanning electron microscopy, Fourier transform infrared spectroscopy and electrochemical techniques have been used to assess the film properties. It has been found that the preparation method of the films greatly affects their water content and thus, electron gun evaporated films have less water incorporated into their structure than their sol–gel counterparts. The former are closely packed and transparent with most of their water content adsorbed on their surface, while the latter have a porous structure, being opaque, highly hydroxylated and hydrated to a lesser extent. Both types of films exhibit reversible electrochromism, with the evaporated films being stable up to 5000 coloration-bleaching cycles and the sol–gel ones gradually degrading after 1000 cycles. Irreversible Li+ trapping related to the presence of water and hydroxyl radicals has been envisaged as the cause of the inferior cycling stability of the sol–gel films.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2015-10-24-
Date of Publication2004-
Bibliographic CitationG. Leftheriotis, S. Papaefthimiou and P. Yianoulis, "The effect of water on the electrochromic properties of WO3 films prepared by vacuum and chemical methods", Solar Energy Materials and Solar Cells, Vol. 83, no. 1, pp. 115–124, Jun. 2004. Doi:10.1016/j.solmat.2004.02.019.en

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