Li+ doped chitosan-based solid polymer electrolyte incorporated with PEDOT:PSS for electrochromic device

Abstract

In this study, solid polymer electrolyte-based on chitosan was prepared with addition of PEDOT:PSS, lithium trifluoromethane sulfonate, propylene carbonate by solvent casting technique. The chitosan-based polymer electrolytes without PEDOT:PSS, with PEDOT:PSS were characterized using electrochemical impedance spectroscopy. The ionic conductivity value was calculated as 4.2 x 10-4 S/cm for the chitosan-based electrolyte including PEDOT:PSS. The SPE having good ionic conductivity was used to fabricate electrochromic device with glass/ITO/WO3|PEDOT:PSS-Ch-LiTRIF-PC|ITO/glass whose performance was evaluated via cyclic voltammetry, transmittance, and repeating chronoamperometry. The optical contrast of ECD was attained as 22% at 800 nm, resulting in a coloration efficiency of 67 cm2 /C. The ECD displays fast response time for coloration (tc), which is 0.29 s. Upon reversal of potential bleaching (tb) forms within 3 s. The findings demonstrated that this SPE electrolyte has promising candidate for use in optoelectronic applications.