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Proceedings Paper

Coloration behavior of hybrid electrochromic films
Author(s): Matthew Denesuk; John P. Cronin; S. R. Kennedy; K. J. Law; G. F. Nielson; Donald R. Uhlmann
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Paper Abstract

A novel synthesis of a sol-gel precursor for WO3 thin films is presented. Through addition of oxalic acid dihydrate to the precursor solution, films with different microstructures may be obtained; and these microstructures are characterized using TEM, FESEM, and SAXS. Without the additive, the films are relatively homogeneous and amorphous; with the additive, the films are multiphase, containing amorphous and crystalline regions. In addition, the latter films contain numerous small regions of apparently much higher electron density, which likely correspond to a dispersed W-rich phase. Optoelectrochemical analysis of the films under galvanostatic conditions demonstrates that the homogeneous, amorphous films display a pronounced cycling effect in both the response of the electrode potential and the optical efficiency. In contrast, the multiphase films show no significant cycling effect.

Paper Details

Date Published: 9 September 1994
PDF: 10 pages
Proc. SPIE 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, (9 September 1994); doi: 10.1117/12.185416
Show Author Affiliations
Matthew Denesuk, Univ. of Arizona (United States)
John P. Cronin, Donnelly Corp. (United States)
S. R. Kennedy, Donnelly Corp. (United States)
K. J. Law, Univ. of Arizona (United States)
G. F. Nielson, Univ. of Arizona (United States)
Donald R. Uhlmann, Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 2255:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII
Volker Wittwer; Claes G. Granqvist; Carl M. Lampert, Editor(s)

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