ELECTROCHROMISM IN THE TRANSITION-METAL PHTHALOCYANINES .4. COMPLEMENTARY COLORS IN COBALT PHTHALOCYANINE FILMS DURING ELECTROCHROMIC CYCLING

Authors
SILVER J LUKES P HOULTON A HEY P AHMET MT
Citation
J. Silver et al., ELECTROCHROMISM IN THE TRANSITION-METAL PHTHALOCYANINES .4. COMPLEMENTARY COLORS IN COBALT PHTHALOCYANINE FILMS DURING ELECTROCHROMIC CYCLING, International journal of electronics, 77(2), 1994, pp. 155-171
Citations number
22
Categorie Soggetti
Engineering, Eletrical & Electronic
Journal title
International journal of electronics → ACNP
ISSN journal
00207217
Volume
77
Issue
2
Year of publication
1994
Pages
155 - 171
Database
ISI
SICI code
0020-7217(1994)77:2<155:EITTP.>2.0.ZU;2-K
Abstract
The electrochromic behaviour of cobalt phthalocyanine [Co(Pc)] films h as been studied using electronic absorption spectroscopy combined with applied potential changes and cyclic voltammetry (where appropriate). The cyan [Co(Pc)] films gave some interesting colours; green and yell ow when reduced and magenta when oxidized. These are the 'complementar y' colours and are essential for high resolution, front-view light ref lection screens. During reduction of the film, evidence for a [Co(I)(P c)]- anion in the films was found, before (Pc) ring reduction occurred . Cycling the [Co(Pc)] films between reduced and neutral states was li mited to a few thousand cycles.