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Electrochromism in WO_3 Evaporated Films

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 32 Issue 1 Page 183-188
published_at 1981
KJ00000156401.pdf
[fulltext] 486 KB
Title
WO_3 蒸着膜のエレクトロクロミズム (IV)
Electrochromism in WO_3 Evaporated Films
Creators Kaneko Hiroko
Creators Miyata Naoyuki
Creators Miyake Kiyoshi
Creators Suedomi Nobuyuki
Source Identifiers
The characteristics of WO_3-ECC display devices consisting of a SnO_2 : Sb-WO_3-liquid electrolyte-SnO_2 : Sb structure were investigated. The SnO_2 : Sb films (sheet resistance of 6-35Ω/□) were prepared by chemical spray deposition method at a substrate temperature of 600℃, and the WO_3 films were prepared by thermal evaporation at a pressure below 3×(10)^<-5>Torr. The liquid electrolytes (containing 10 vol.% glycerol) used were 1N H_2SO_4,1N MgCl_2,1N CdCl_2,1N SnCl_4 and saturated InCl_3,aqueous solution. For any liquid electrolyte, a blue color appears in the area of WO_3 film with the counter electrode positively biased. The optical transmission spectrum of colored WO_3 films shows a broad bottom around 9500 A. The injected charge per unit volume in films has a constant value for the ECC cells with saturated coloration under an applied voltage of 2.5V. For the electrolyte of 1N H_2SO_4,1N MgCl_2,1N CdCl_3,1N SnCl_4 and sat. InCl_3,the constant value were 1.12×(10)^3C/(cm)^3,1.26×(10)^3C/(cm)^3,0.79×(10)^3C/(cm)^3,1.08×(10)^3C/(cm)^3 and 0.8×(10)^3C/(cm)^3,respectively. From the assumption of double injection of cations and electrons, tungsten bronze M_xWO_3 were found to be H_<0.38>WO_3,Mg_<0.21>WO_3,Cd_<0.14>WO_3,Sn_<0.09>WO_3 and In_<0.09>WO_3,respectively. Bleaching of the ECC cells was also described.
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 1981
File Version Version of Record
Access Rights open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools 工学部