CARBAZOLE MODIFIED POLYSILOXANES - ROLE OF COUNTERIONS IN THE DYNAMICPROPERTIES OF ELECTROCHEMICAL DISPLAYS

Authors
HEPBURN AR GOLDIE DM
Citation
Ar. Hepburn et Dm. Goldie, CARBAZOLE MODIFIED POLYSILOXANES - ROLE OF COUNTERIONS IN THE DYNAMICPROPERTIES OF ELECTROCHEMICAL DISPLAYS, Journal of materials science. Materials in electronics, 5(2), 1994, pp. 94-100
Citations number
8
Categorie Soggetti
Engineering, Eletrical & Electronic","Physics, Condensed Matter","Material Science
Journal title
Journal of materials science. Materials in electronics → ACNP
ISSN journal
09574522
Volume
5
Issue
2
Year of publication
1994
Pages
94 - 100
Database
ISI
SICI code
0957-4522(1994)5:2<94:CMP-RO>2.0.ZU;2-G
Abstract
Carbazole modified polysiloxanes (CMPs) have been electrochemically cr oss-linked to form composite thin films containing oxidized carbazole dimers(bicarbazolyls) together with associated counter-ions. These mat erials have been found to undergo reversible switching between a colou red (oxidized) and clear (reduced) state. Investigations of the dynami c response reveal that the colouration step is rate-limited by charge transfer across the electrolyte-film interface essentially independent of counter-ion, while the bleaching effects are controlled by a doubl e extraction mechanism dependent on counter-ion mobility.