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Proceedings Paper

Electrochromic and optical properties of mixed WO3-TiO2 thin films produced by sputtering and the sol-gel technique
Author(s): J. F. Goettsche; Andreas Hinsch; Volker Wittwer
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Paper 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.

Paper Details

Date Published: 25 November 1992
PDF: 13 pages
Proc. SPIE 1728, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Chromogenics for Smart Windows, (25 November 1992); doi: 10.1117/12.130544
Show Author Affiliations
J. F. Goettsche, Fraunhofer-Institut fuer Solare Energiesysteme (Germany)
Andreas Hinsch, Fraunhofer-Institut fuer Solare Energiesysteme (Germany)
Volker Wittwer, Fraunhofer-Institut fuer Solare Energiesysteme (Germany)


Published in SPIE Proceedings Vol. 1728:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Chromogenics for Smart Windows

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