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Electrochromism in WO_3 evaporated films

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 31 Issue 2 Page 305-310
published_at 1981-03
KJ00000156368.pdf
[fulltext] 477 KB
Title
WO_3蒸着膜のエレクトロクロミズム (III)
Electrochromism in WO_3 evaporated films
Creators Ozaki Satoru
Creators Kaneko Hiroko
Creators Miyata Naoyuki
Creators Miyake Kiyoshi
Source Identifiers
The performance characteristics of EC display devices were investigated. The devices used in this study were EC cells having a SnO_2 : Sb-WO_3-liquid electrolyte-SnO_2 : Sb structure. The WO_3 films were prepared on SnO_2 : Sb coated glass substrate by thermal evaporation at pressure below 1.5×(10)^<-5> Torr. The thickness of the WO_3 films were in the range of 2000-3900A. The liquid electrolytes used were H_2SO_4,Li_2SO_4,Na_2SO_4 and K_2SO_4. For any liquid electrolyte, a bule color appeared for EC devices with transparent electrode negatively biased. The optical transmission spectrum of the WO_3 films showed a peak at around 3800A and a broad bottom peaked around 9000A. Coloration current response of the liquid EC cells showed a t^<-1/2> dependence of current, and bleaching current response of the EC cells did a t^<-3/4> dependence of current under the condition of dc applied voltage below 2 V across the EC cells. Under the dynamic condition, corrosion of the counter electrode were with the forward biased (bleaching) greated than with the reverse biased (coloration).
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1981-03
File Version Version of Record
Access Rights open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools 工学部