Characterization of Electrochromic Properties of Polyaniline Thin Films Electropolymerized in H 2 SO 4 Solution

  • Ninh D
  • Thi Thao T
  • Duy Long P
  • et al.
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Abstract

Polyaniline (PANI) onto indium-doped tin-oxide (ITO)-coated glass samples were prepared by electroopolymerization in 0.5 M H 2 SO 4 solution. Structure and morphology characterization of the PANI films demonstrated that the films were grown onto ITO substrates in the form of polycrystal-line microbelts separated by micropores. By analysing the UV-Vis absorption spectra of the PANI films, the energy bandgap was found to be approximately 2.75 eV. The PANI/ITO films exhibited a good reversible electrochromic display (ECD) performance when cycled in 0.1 M LiClO 4 + pro-py-lene carbonate. The response time of the ECD coloration was found to be as small as 15 s and the coloration efficiency was found to be 8.85 cm 2 × C −1 . After 100 cycles of the ECD performance, the cyclic voltammetry curve of the working electrode maintained unchanged. This demonstrates that the electropolymerized PANI films can be served as a good candidate for ECD applications, taking advantage of their excellent properties in terms of chemical stability.

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APA

Ninh, D. H., Thi Thao, T., Duy Long, P., & Dinh, N. N. (2016). Characterization of Electrochromic Properties of Polyaniline Thin Films Electropolymerized in H 2 SO 4 Solution. Open Journal of Organic Polymer Materials, 06(01), 30–37. https://doi.org/10.4236/ojopm.2016.61004

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