"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Influence of the electrodeposition conditions on the energetics of polypyrrole thin films

V. FIGÁ1,* , Z. ESSAIDI2

Affiliation

  1. Department of Chemical, Process and Materials Engineering, Viale delle Scienze, 90123 Palermo, Italy
  2. University of Angers, FRE CNRS 2988, Laboratoire des Propriétés Optiques des Matériaux et Applications, 2 Boulevard Lavoisier, 49045 Angers Cedex 01, France

Abstract

The influence of the solvent used for the electrodeposition and that of the dopant anion on the energetics of electrochemically grown polypyrrole were studied by means of a non-destructive optical technique: Photocurrent Spectroscopy. Polypyrrole films doped with the same anion and grown in different solvents, both aqueous and nonaqueous, show the same HOMO-LUMO gap and the same Fermi level location in respect to HOMO. Polypyrrole films doped with different anions in aqueous solutions, present different values of indirect band gap and flat band potential, indicating that dopant anion influences both the defects band and the Fermi level locations..

Keywords

Photocurrent Spectroscopy, Band gap, Flat Band Potential, Fermi Level, Polypyrrole.

Submitted at: Nov. 7, 2008
Accepted at: Dec. 10, 2008

Citation

V. FIGÁ, Z. ESSAIDI, Influence of the electrodeposition conditions on the energetics of polypyrrole thin films, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 12, pp. 3392-3397 (2008)