PEDOT:PSS post-treated by DMSO using spin coating, roll-to-roll and immersion: a comparative study

  • Rafael Misael Vedovatte
  • Matheus Colovati Saccardo
  • Eduardo Lima Costa
  • Carlos Eduardo CavaEmail author


Poly(3,4-ethylenedioxythiophene) doped with poly(styrene sulfonate) anions (PEDOT:PSS) is a polymer widely used in organic optoelectronic devices as a hole transport material. This polymer is transparent, flexible, easy to process, and exhibits high resistance to degradation. However, the (PEDOT:PSS) can present low electrical conductivity, and subsequent treatment with a dopant material, such as Dimethyl Sulfoxide (DMSO), is often necessary to improve its performance as an electrode. In this work, the effect of the DMSO on PEDOT:PSS was studied and its relation with the deposition method, such as spin coating and roll-to-roll, was analyzed. To optimize their performance as an electrode, both films were post-treated several times using DMSO via the same deposition method until it has the highest value of conductivity. Optical, morphological, and electrical properties are reported as a function of deposition method and solvent treatment. It has been demonstrated that the films formed by both methods present high transparency in the visible spectrum, electrical conductivity and morphological characteristics suitable for use in optoelectronic devices. Also, the roll-to-roll deposition method proved to be promising for the development of large-scale conductive transparent films.



This work was partially supported by the Brazilian Institute of Science and Technology (INCT) in Carbon Nanomaterials and the Brazilian agencies Fapemig, CAPES, and CNPq. The authors gratefully acknowledge the financial support of CNPq, CAPES, and F. Araucária.

Compliance with ethical standards

Conflicts of interest

The authors declare that they have no conflicts of interest.

Supplementary material

10854_2019_2524_MOESM1_ESM.pdf (101 kb)
Supplementary material 1 (PDF 102 kb)


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringTechnological Federal University of Paraná (UTFPR)LondrinaBrazil

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