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Electrochromism in WO_3 Evaporated Films

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 31 Issue 1 Page 99-104
published_at 1980
KJ00000156339.pdf
[fulltext] 459 KB
Title
WO_3 蒸着膜のエレクトロクロミズム (II)
Electrochromism in WO_3 Evaporated Films
Creators Kaneko Hiroko
Creators Miyata Naoyuki
Creators Miyake Kiyoshi
Source Identifiers
This investigation was made on the electrochemichromic mechanism in liquid-EC cell systems. WO_3 film were prepared by thermal evaporation in vacuum below 1×(10)^<-5> Torr on a SnO_2 : Sb coated glass substrate. The deposition rate of the films was in tee range of 250-600 Å/min.. X-ray analysis indicated the films to be amorphous. In an electrochemichromic cell containing H_2SO_4 electrolyte, the color of WO_3 film changes from trans-arent to blue by applying an electric field. The response of coloration and bleaching greatly depended upon the sheet resistance of both transparent electrodes, and the spacing between WO_3 film and counter electrode. Upon the application of 2-3 Volt across the EC cell, it was found that under the following experimental conditions the cell current shows t^<-1/2> dependence (Butler-Volmer's law) in coloring process and t^<-3/4> dependence (Faughnan's law) in the bleaching process : the thickness of films was in the range of 2000-3000 Å, and sheet resistance of transparent electrodes was below 10 ohm/□, and WO_3 film-counter electrode spacing was below 0.2mm.
Subjects
電気電子工学 ( Other)
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1980
File Version Version of Record
Access Rights open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools 工学部