Abstract
AbstractPoly(diphenyldithieno[3,2‐b;20,30‐d]thiophene) was synthesized by electropolymerization on Pt quartz crystal and on an indium tin oxide electrode by cyclic voltammetry. Ionic diffusion through the electronic conducting film (for the p‐doping process) was studied by cyclic voltammetry coupled to a quartz crystal microbalance (E‐QCM) and electrochemical impedance spectroscopy (EIS), using different electrolyte salts such as LiTFSI, LiClO4 or LiCF3CO2. The molar ratio of insertion/expulsion of anions and cations was estimated from E‐QCM. By comparison between E‐QCM and EIS, the intrinsic ionic diffusion mechanisms in the electronic conducting film were highlighted depending on the salts used in acetonitrile. Moreover, the different mechanisms are in good agreement with the molar ratio of anion/cation insertion/expulsion. © 2018 Society of Chemical Industry
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