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Document Type : Original Article

Authors

1 Department of Textile Engineering, Isfahan University of Technology, P.O. Box 8415683111, Isfahan, Iran

2 Departament d’Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, Barcelona, Spain

3 Department of Chemistry, Isfahan University of Technology, P.O. Box 8415683111, Isfahan, Iran

4 2. Departament d’Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, Barcelona, Spain

Abstract

The color behavior of the polypyrrole electrochromic films (PEFs) doped with three types of dopants;
perchloride (ClO4
-), the anionic surfactant of sodium dodecyl sulfate (SDS), and dye molecule of acid red
18 (AR18) was analyzed with a spectroelectrochemical device. The spectroelectrochemical properties of
the films were obtained at different potentials between ±1V and in the wavelength range of 300-1100 nm.
The color coordinates of the films were calculated using CIELAB, CIExyY, and the RGB of characterized
display color spaces. The results showed that the color of the PEFs at neutral and redox states can be
changed by the use of different dopants, especially the dye molecule. Also, in the presence of the AR18,
the color gamut of the PEFs changed and expanded. In addition, the CIELAB color differences between
reduction (-1V) and oxidation (+1V) states in PPy/ClO4
-, PPy/AR18, and PPy/SDS were 32, 38, and 42,
respectively.

Keywords