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Characterization of Electrochromic WO3-Layers Prepared by Sol-Gel Nanotechnology

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Abstract

Stable tungsten oxide coating sols suitable for electrochromic applications were prepared by a modified peroxotungstic acid route. Layers up to 250 nm thickness could be deposited on ITO-coated and/or FTO-coated glass substrates in a single dip-coating process. Optoelectrochemical measurements were employed to determine the variation of the electrochromic properties (change in optical density (ΔOD) and switching times) of WO3-layers, investigated as a function of coating parameters, such as chamber humidity and the temperature of heat treatment. High resolution transmission electron microscopy (HR-TEM) has shown that the optimized layers possess a partially crystalline morphology with nanocrystalline regions 2–3 nm in size.

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Authors and Affiliations

  1. Institut für Neue Materialien, Im Stadtwald, Geb. 43, D-66123, Saarbrücken, Germany

    B. Munro, S. KrÄmer, P. Zapp & H. Krug

Authors
  1. B. Munro
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  2. S. KrÄmer
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  3. P. Zapp
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  4. H. Krug
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Munro, B., KrÄmer, S., Zapp, P. et al. Characterization of Electrochromic WO3-Layers Prepared by Sol-Gel Nanotechnology. Journal of Sol-Gel Science and Technology 13, 673–678 (1998). https://doi.org/10.1023/A:1008684720378

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  • DOI: https://doi.org/10.1023/A:1008684720378

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