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), Vol. 141:7; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
TUNGSTEN OXIDES
ELECTROCHROMISM
DISPLAY DEVICES
ELECTRODEPOSITED COATINGS
LIGHT TRANSMISSION
LITHIUM
MATHEMATICAL MODELS
RESPONSE FUNCTIONS
SOLAR RADIATION
SPECTROSCOPY
ULTRAVIOLET RADIATION
VISIBLE RADIATION
WINDOWS
ALKALI METALS
CHALCOGENIDES
COATINGS
COMPUTER OUTPUT DEVICES
COMPUTER-GRAPHICS DEVICES
ELECTRO-OPTICAL EFFECTS
ELECTROMAGNETIC RADIATION
ELEMENTS
FUNCTIONS
METALS
OPENINGS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
REFRACTORY METAL COMPOUNDS
STELLAR RADIATION
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
320107* - Energy Conservation
Consumption
& Utilization- Building Systems- (1987-)
360104 - Metals & Alloys- Physical Properties