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Electrochromism in WO_3 Evaporated Films

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 30 Issue 2 Page 317-323
published_at 1980
KJ00000156311.pdf
[fulltext] 490 KB
Title
WO_3 蒸着膜のエレクトロクロミズム (I)
Electrochromism in WO_3 Evaporated Films
Creators Okamura Kazuo
Creators Ozaki Satoru
Creators Kaneko Hiroko
Creators Miyata Naoyuki
Creators Miyake Kiyoshi
Source Identifiers
The electrical and optical properties of electrochromic WO_3 amorphous films have been investigated. It was found that the coloration of WO_3 films occurred with various electrolytes (H_2SO_4,Li_2SO_4,Na_2SO_4,K_2SO_4). The coloring current at constant voltage decreases monotonically due to electrode process. The bleaching current cuts off when the charge extracted equals the charge injected, at least at moderate coloration density. The position of the broad absorption peak in colored WO_3 films was about 1.4eV. The electronic charge injected up to the saturated transmission of WO_3 films (250Å-6550Å thick) with a H_2SO_4 electolyte was about 2.0×(10)^3 C/(cm)^3 at the voltage of 3V. A model for electrochromic effect is presented whereby the WO_3 film forms hydrogen tungsten bronze (H_xWO_3,x=0.67).
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