The influence of electrode material on charge transport properties of polypyrrole thin films

Authors
Valaski, R Ayoub, S Micaroni, L Hummelgen, IA
Citation
R. Valaski et al., The influence of electrode material on charge transport properties of polypyrrole thin films, THIN SOL FI, 388(1-2), 2001, pp. 171-176
Citations number
24
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
THIN SOLID FILMS
ISSN journal
00406090 → ACNP
Volume
388
Issue
1-2
Year of publication
2001
Pages
171 - 176
Database
ISI
SICI code
0040-6090(20010601)388:1-2<171:TIOEMO>2.0.ZU;2-L
Abstract
We investigated electrodeposited polypyrrole (PPy) thin films. Tin-oxide (T O) and Au were used as deposition substrate and it was found that film morp hology and roughness are strongly influenced by substrate choice. We determ ined the electrical conductivity of PPy, films in Au/PPy/Ni, Au/PPy/Al, TO/ PPy/Ni and TO/PPy/Al devices and estimated the positive charge carrier mobi lity and charge carrier concentration in PPy. Comparing the onset potential s for oxidation in the cyclic voltammograms of PPy and poly(3-methylthiophe ne) we constructed the energy levels diagram of PPy. (C) 2001 Elsevier Scie nce B.V. All rights reserved.