Electrochromism of electrodeposited tungsten trioxide films; 1: Electrochemical characterization

Journal Article · Fri Jul 01 00:00:00 EDT 1994 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2055000· OSTI ID:7021576

Shen, P K; Chen, K Y; Tseung, A C.C. ^[1]

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1. Univ. of Essex, Colchester (United Kingdom). Dept. of Chemistry and Biological Chemistry

Electrodeposited tungsten trioxide films show fast electrochromic response both in aqueous and in nonaqueous solutions. The values of x in the tungsten bronzes, M[sub x]WO[sub 3], were determined by using a chronopotentiometric technique combined with UV/Vis spectroscopic analysis. The effect of double-layer charging was discussed. A finite diffusion control model was used to analyze the insertion behavior of M[sup +] ions into the films. The apparent diffusion coefficient of Li[sup +] through the electrodeposited WO[sub 3] film is about two orders of magnitude higher than that of vacuum-evaporated WO[sub 3] films, indicating that electrodeposited films are more suitable for use as display devices than vacuum-evaporated films. The higher porosity of the electrodeposited WO[sub 3] films may be a main reason for the fast electrochromic response.

• OSTI ID: 7021576
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 141:7; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

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CHALCOGENIDES
COATINGS
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COMPUTER-GRAPHICS DEVICES
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