Journal of Solid State Electrochemistry

, Volume 23, Issue 3, pp 823–835 | Cite as

Electrochromic and electrochemical properties of copolymer films based on EDOT and phenylthiophene derivatives

  • Glenda Ribeiro de Barros Silveira Lacerda
  • Claudinei Rezende Calado
  • Hállen Daniel Rezende CaladoEmail author
Original Paper


The poly(3,4-ethylenedioxythiophene-co-3-phenylthiophene) (P(EDOT-co-3PT)) and poly(3,4-ethylenedioxythiophene-co-3-(4-fluorophenyl)thiophene) (P(EDOT-co-FPT)) were electropolymerized with the application of 1.62 V and 1.95 V, respectively. Unpublished spectroelectrochemical and electrochromic properties of the conjugated copolymers with monomer ratio of 1:1 were investigated. A potential range of − 1.0 to 2.0 V was found to be suitable for the device operation between blue to purple (P(EDOT-co-3PT)) and (P(EDOT-co-FPT)). The maximum transmittance difference (Δ% T) was determined to be 8.24 and 10.37%, and the time differences between oxidation and reduction were 2.14 and 2.94 s. The copolymers showed lower band gap energies than their original homopolymers (~ 1.4 eV).


Polythiophenes Copolymer Electrochemistry Spectroelectrochemical Electrochromism 



The authors thank the CEFET-MG for the images provided. Special thanks to Luiza De Lazari Ferreira for valuable remarks and support.

Funding information

This work was supported by CNPq (457586/2014-1), CAPES, and FAPEMIG (TEC; APQ-02715-14).

Supplementary material

10008_2018_4185_MOESM1_ESM.doc (992 kb)
ESM 1 (DOC 992 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Glenda Ribeiro de Barros Silveira Lacerda
    • 1
  • Claudinei Rezende Calado
    • 2
  • Hállen Daniel Rezende Calado
    • 1
    Email author
  1. 1.Departamento de Química, ICExUniversidade Federal de Minas Gerais (UFMG)Belo HorizonteBrazil
  2. 2.Centro Federal de Educação Tecnológica de Minas Gerais (CEFET-MG)Belo HorizonteBrazil

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