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 ofPEDOT:PSS, lithium trifluoromethane sulfonate, propylene carbonate by solvent casting technique. Thechitosan-based polymer electrolytes without PEDOT:PSS, with PEDOT:PSS were characterized usingelectrochemical impedance spectroscopy. The ionic conductivity value was calculated as 4.2 x $10-4$ S/cmfor the chitosan-based electrolyte including PEDOT:PSS. The SPE having good ionic conductivity was usedto fabricate electrochromic device with glass/ITO/$WO3$|PEDOT:PSS-Ch-LiTRIF-PC|ITO/glass whoseperformance was evaluated via cyclic voltammetry, transmittance, and repeating chronoamperometry. Theoptical 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 usein optoelectronic applications.