Influence of residual sodium ions on the structure and properties of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)

Hangyeol Cho, Wonseok Cho, Youngno Kim, Jin Geun Lee, Jung Hyun Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is a promising conducting polymer in terms of its applicability to transparent and flexible electronic devices. Generally, a negatively charged PSS chain can interact with alkali metal cations like sodium and potassium. During polymerization, these ions, especially sodium ions, remain in an aqueous state and affect particle formation. This paper describes the effect of residual sodium ions on the synthesis of PEDOT:PSS and its electrical and optical properties. Removing the sodium ions weakens the coulombic interaction between the PEDOT and PSS chains, which leads to a linear conformation. This conformational change enhances the electrical conductivity and work function. Furthermore, transmittance in the visible region increased remarkably because the intrinsic electrical properties of the PEDOT:PSS particles were improved. Moreover, the colloidal stability was enhanced because the particle coagulation caused by residual sodium ions was reduced. In summary, we determined that sodium ions in PEDOT:PSS have a considerable influence on its electrical and optical properties and colloidal stability for practical applications.

Original languageEnglish
Pages (from-to)29044-29050
Number of pages7
JournalRSC Advances
Volume8
Issue number51
DOIs
Publication statusPublished - 2018 Jan 1

Fingerprint

Sodium
Ions
Electric properties
Optical properties
Alkali Metals
Flexible electronics
Conducting polymers
Alkali metals
Coagulation
Potassium
Conformations
poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)
Cations
Positive ions
Polymerization

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Cho, Hangyeol ; Cho, Wonseok ; Kim, Youngno ; Lee, Jin Geun ; Kim, Jung Hyun. / Influence of residual sodium ions on the structure and properties of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate). In: RSC Advances. 2018 ; Vol. 8, No. 51. pp. 29044-29050.
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Influence of residual sodium ions on the structure and properties of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate). / Cho, Hangyeol; Cho, Wonseok; Kim, Youngno; Lee, Jin Geun; Kim, Jung Hyun.

In: RSC Advances, Vol. 8, No. 51, 01.01.2018, p. 29044-29050.

Research output: Contribution to journalArticle

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AB - Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is a promising conducting polymer in terms of its applicability to transparent and flexible electronic devices. Generally, a negatively charged PSS chain can interact with alkali metal cations like sodium and potassium. During polymerization, these ions, especially sodium ions, remain in an aqueous state and affect particle formation. This paper describes the effect of residual sodium ions on the synthesis of PEDOT:PSS and its electrical and optical properties. Removing the sodium ions weakens the coulombic interaction between the PEDOT and PSS chains, which leads to a linear conformation. This conformational change enhances the electrical conductivity and work function. Furthermore, transmittance in the visible region increased remarkably because the intrinsic electrical properties of the PEDOT:PSS particles were improved. Moreover, the colloidal stability was enhanced because the particle coagulation caused by residual sodium ions was reduced. In summary, we determined that sodium ions in PEDOT:PSS have a considerable influence on its electrical and optical properties and colloidal stability for practical applications.

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