Preparation of Paper-Based PEDOT: PSS Conductive Film Using Gravure Printing

The conductivity film of Poly(3,4-ethylenedioxythiophene): poly(styrene suffocate) (PEDOT:PSS) on ink-jet printing paper is prepared by gravure printing doped with dimethyl sulfide (DMSO), isopropyl alcohol (IPA) and methanol (Me). Comparing the effect of film-forming of the three doping solvents, IPA with relatively film uniformity is selected as the doping solvent to further explore the influence of different doping ratios on the uniformity of conductive film. In addition, methane sulfonic acid is employed to improve conductivity of PEDOT:PSS film. Meanwhile, the relationship between solvent doping ratio and film of uniformity and conductivity is discussed. Considering the uniformity and conductivity of film, the PEDOT:PSS film with uniform and low sheet resistance (373 Ω/□) is obtained. Then, the lower sheet resistance (273 Ω/□) can be further developed by the two-layer printing.