Comparison of PEDOT films obtained via three different routes through spectroelectrochemistry and the differential cyclic voltabsorptometry method (DCVA)

Sandrine Duluard (1) , Blanche Ouvrard (1) , A. Celik-Cochet (2) , Guy Campet (1) , U. Posset (2) , G. Schottner (2) , Marie-Hélène Delville (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 Fraunhofer ISC - Fraunhofer Institute for Silicate Research

The performance of different poly(3,4-ethylenedioxythiophene) (PEDOT) films was compared by electrochemical, spectroelectrochemical, and time-derivative measurements of absorbance versus potential (linear potential-scan voltabsorptometry) for an overall spectroelectrochemical characterization of the electrochromic properties in ionic liquids such as 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BMITFSI). The time-derivative signals were monitored at different wavelengths, and information obtained therefrom was complementary to that obtained from conventional cyclic voltammetry. PEDOT films prepared via in situ chemical oxidative polymerization appeared to be much more efficient than electropolymerized and PEDOT−poly(styrenesulfonate) (PSS) reference films, in terms of both contrast ratio and coloration efficiency, which was the case even for PEDOT films deposited on less conductive flexible plastic substrates.

Domaines: Matériaux

Sandrine Duluard, Blanche Ouvrard, A. Celik-Cochet, Guy Campet, U. Posset, et al.. Comparison of PEDOT films obtained via three different routes through spectroelectrochemistry and the differential cyclic voltabsorptometry method (DCVA). Journal of Physical Chemistry B, 2010, 114 (22), pp.7445-7451. ⟨10.1021/jp9111712⟩. ⟨hal-00491011⟩