Abstract
In this study, the polyaniline (PANI) and the poly(3-methylthiophene)
(PMeT) of the conductive polymer electrochromic thin films had been
deposited on the indium tin oxide/glass (ITO/Glass) substrate by electrochemical
polymerization, respectively. The cycling stability of the electrochromic
thin film prepared with the variety of the different charge densities
was investigated. The electrochromic behaviors of the PMeT/ITO/Glass
and PANI/ITO/Glass were performed in the electrolytes of 0.1 M lithium
perchlorate
$({{LiClO}}_{4})$
/propylene carbonate (PC) and 0.1 M
${{LiClO}}_{4}+0.001\
{{M}}$
perchloric acid
$({{HClO}}_{4})/{{PC}}$
, respectively. The colors of the PMeT thin film exhibited
blue and red in oxidation and reduction states, respectively. And
the colors of the PANI thin film exhibited green and yellow in oxidation
and reduction states, respectively. Furthermore, the absorbance and
transmittance (T%) of the electrochromic thin film were measured by
ultraviolet-visible (UV-Visible) spectrometer in this study. Besides,
in order to find the optimal manufacture conditions of the electrochromic
thin film, the potentials of redox reaction and cycles were investigated
by the cyclic voltammetry (CV) measurement system to analyze the cycling
stability of the electrochromic thin film with the variety of the
different charge densities. Finally, the reflectance (R%) of the optimal
parameters of the electrochromic thin film was measured by chroma
meter in this study. And the variational colors of the electrochromic
thin film were observed by the chromaticity coordinates of the Commission
Internationale de l'Eclairage (CIE), so that the electrochromic thin
film can be applied to the filed of display.
© 2015 IEEE
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