Characterization of Electrochromic Properties of Polyaniline and Polyethylenedioxythiophene based Devices

Abstract

Polyaniline (PANI) and polyethylenedioxythiophene (PEDOT) onto ITO-coated glass samples were prepared by electro-polymerization. UV-Vis transmission spectra of the both films show that PEDOT films have a high transmittance in a range from 350 to 600 nm, whereas PANI films exhibit a light-green color. The PANI-PEDOT electrochromic devices exhibited a deep-blue coloration and a good reversible coloration /bleaching performance in 0.1M LiClO4 +PC electrolyte. The response time of the ECD coloration was found to be as small as 20 s and the coloration efficiency was found to be of 10.70 cm2 ï‚´C-1. This demonstrates that the electropolymerized PANI and PEDOT films can be served as a good candidate for complementary ECD smart windows, taking advantage of their excellent properties in terms of chemical stability.