Study on the electrochromic properties of polypyrrole layers doped with different dye molecules

Three dye molecules (Dye) of Acid Brilliant Scarlet 3R (AR18), Amido Naphthol Red G (AR1), Indigo Carmine (IC), as well sodium dodecyl sulfate (SDS) dopant agents were used for electrochemical synthesis polypyrrole (PPy) layers onto indium doped tin oxide (ITO) coated polyethylene terephthalate (PET) electrode. The morphology, electrochemical, optical, and spectroelectrochemical properties the investigated. study behavior showed that presence each AR18, AR1, or IC with SDS, had shown an excellent synergistic effect on stability layers. morphological characterization PPy/dopant(s) using atomic force microscopy (AFM) surface roughness in PPy/IC-SDS layer was 39% 32% less than PPy/AR18-SDS PPy/AR1-SDS, respectively. absorption spectrum UV–Vis-NIR wavelength range formation polaron bipolaron PPy chains. Also, optical bandgap energy decreased, fully state all films observed. Spectroelectrochemical simultaneous use molecule surfactant demonstrated proper satisfactory electrochromic parameters. For example, color contrast 50%, while this parameter control sample (PPy lithium perchlorate) 21%. cathodic anodic coloration efficiency a 6-fold increase PPy/Dye-SDS compared to PPy/ClO4-. In general, according results it is likely by increasing number anion groups decreasing their dimensions agents, resultant would be improved.