Journal
ELECTROCHIMICA ACTA
Volume 46, Issue 13-14, Pages 1951-1956Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0013-4686(01)00384-X
Keywords
electrochromism; WO3 films; TiO2 doping; adsorbed water; cyclic voltammetry
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TiO2 (10 at.%)-doped WO3 thin films were deposited on ITO-coated glass substrates by spin-coating a peroxotungstic acid solution which was stabilized by the addition of Ti(OBun)(4). Effects of annealing temperature and water content on the electrochromic properties of the WO3-TiO2 films were investigated by cyclic voltammograms coupled with in situ monochromatic transmittance measurements. The poor electrochromic properties of the 350 degreesC-annealed films were found to have been largely improved by storing in air for 1 week, presumably due to the accelerating role of adsorbed water in the lithium insertion into the WO3-TiO2 films. (C) 2001 Elsevier Science Ltd. All rights reserved.
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