Electrochromic and optical properties of mixed WO3-TiO2 thin films produced by sputtering and the sol-gel technique

J. F. Goettsche; Andreas Hinsch; Volker Wittwer

doi:10.1117/12.130544

25 November 1992 Electrochromic and optical properties of mixed WO₃-TiO₂ thin films produced by sputtering and the sol-gel technique

J. F. Goettsche, Andreas Hinsch, Volker Wittwer

Author Affiliations +

Proceedings Volume 1728, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Chromogenics for Smart Windows; (1992) https://doi.org/10.1117/12.130544
Event: Optical Materials Technology for Energy Efficiency and Solar Energy, 1992, Toulouse-Labege, France

Abstract

Because of their dense structure, electrochromic sputtered tungsten oxide thin films often show low coloration efficiency, low ion mobility, and the tendency to incorporate lithium ions irreversibly. An interesting possibility to modify the structure is the admixture of other non- absorbing metal oxides. Recent results from Japan indicate improved electrochromic behavior of evaporated WO₃ - TiO₂ mixed films. In order to verify this effect for different deposition techniques, we examined thin films of WO₃ - TiO₂ produced by the sol-gel method and dc magnetron sputtering. Both types of films were characterized optically and electrochemically in organic LiClO₄ solutions. The cycling stability as a function of titania concentration was recorded. Improved electrochromic properties were found for both sputtered and sol-gel films.

Citation Download Citation

J. F. Goettsche, Andreas Hinsch, and Volker Wittwer "Electrochromic and optical properties of mixed WO₃-TiO₂ thin films produced by sputtering and the sol-gel technique", Proc. SPIE 1728, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Chromogenics for Smart Windows, (25 November 1992); https://doi.org/10.1117/12.130544

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