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The Investigation of the Electrochromic Characteristics for the PANI Thin Film by Cyclic Voltammetry and Potentiostatic Method

—The objective of this study is to investigate optical and electrochemical characteristics of Polyaniline (PANI)/indium tin oxide/glass (ITO/Glass) by cyclic voltammetry and potentiostatic method. The electrochromic behaviors of the PANI/ITO/Glass were performed in 0.1 M lithium perchlorate (LiClO 4) /propylene carbonate (PC) electrolyte. The PANI/ITO/Glass had the best optical characteristics and electrochemical characteristics when the deposited cycle and voltage of the PANI thin film were set for 10 times and-0.5 V~ +1.5 V, respectively. The coloration efficiency (η) of the PANI/ITO/Glass was 9.35 cm 2 /C. Furthermore, the experimental results observed that the color of PANI/ITO/Glass was changed from Green (oxidation state) to Light Green (reduction state).