Spectroelectrochemical behaviour of poly (3-octylthiophene): application to electrochromic windows with polyaniline and iridium oxide |
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| Authors: | M-N Collomb-Dunand-Sauthier S Langlois E Genies |
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| Affiliation: | (1) Laboratoire d'Electrochimie Moléculaire, Service des Systèmes et Architectures Moléculaires, Département de Recherche Fondamentale sur la Matière Condensée, Centre d'Etudes Nucléaires de Grenoble, 85X, 38041 Grenoble, France;(2) Present address: Laboratoire d'Electrochimie Organique et de Photochimie Rédox (URA CNRS 1210), Université Joseph Fourier, 53X, 38041 Grenoble, France |
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| Abstract: | The spectroelectrochemical behaviour of cast poly(3-octylthiophene) (POT) films (0.2 and 0.5  m) on indium-tin-oxide (ITO) glass electrodes has been investigated in organic media. These thin films exhibit interesting electrochromic properties and their application in electrochromic devices has been examined in liquid (CH3CN + LiClO4 0.3 M) and viscous electrolyte (PEO + CH3CH + LiClO4). Polyaniline (PANI) film appears to be a convenient complementary counter electrode since its transmission maximum corresponds to its oxidized state and that of POT film to its reduced state. Thin films of iridium oxide (IrO2) are also possible counter electrodes, even in acetonitrile, the electrochemical behaviour being mostly capacitive with a low transmission change. However, the best contrast is obtained with the POT/PANI system. |
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