Effects of interfacial modification for vapor phase polymerized PEDOT on glass substrate

Boxiao Li, Kenneth H. Skorenko, Haian Qiu, Jeffrey M. Mativetsky, Derek B. Dwyer, William E. Bernier, Wayne E. Jones

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Optically transparent and highly conductive poly(3,4-ethylenedioxythiophene) (PEDOT) thin films were grown through vapor phase polymerization on (3-Mercaptopropyl)trimethoxysilane functionalized 3,4-Ethylenedioxythiophene (MPTMS functionalized EDOT) grafted glass substrates. Compared to bare glass, the EDOT grafted surface led to enhancements in both electrical conductivity and adhesion of PEDOT thin films. A quinoid-rich structure with increased crystallinity and a further enhanced conductivity was induced by post-deposition sulfuric acid doping. X-ray diffraction showed different orientations of the PEDOT crystals grown on substrates with and without EDOT grafting. The highest conductivity of 2690 S/cm, with an average optical transmittance of 95.4 % in the visible range, was achieved when PEDOT was vapor phase polymerized on EDOT grafted substrates and doped with 98 % sulfuric acid. Photostability was tested using a xenon arc light source and characterized by attenuated total reflection Fourier-transform infrared spectroscopy, showing that photo-induced degradation is associated with a decrease in C[dbnd]C double bond content.

Original languageEnglish
Article number116293
JournalSynthetic Metals
Volume260
DOIs
StatePublished - Feb 2020
Externally publishedYes

Funding

This work was supported by the Integrated Electronics Engineering Center (IEEC) under award number: IEEC066 . Appendix A

Keywords

  • Adhesion
  • Conductive polymer
  • EDOT grafting
  • Sulfuric acid doping
  • Transparent conductive thin film
  • Vapor phase polymerization

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