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Vol. 32, No. 8(2), S&M2292

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Online: ISSN 2435-0869
Sensors and Materials
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Sensors and Materials, Volume 30, Number 12(2) (2018)
Copyright(C) MYU K.K.
pp. 2873-2879
S&M1724 Research Paper of Special Issue
https://doi.org/10.18494/SAM.2018.1986
Published: December 18, 2018

In situ Monitoring of Vapor-phase Polymerization and Characterization of Poly(3,4-ethylenedioxythiophene) Thin Films [PDF]

Yasuko Koshiba, Mana Hirai, Shohei Horike, Masahiro Morimoto, Masahiro Misaki, Tastuya Fukushima, and Kenji Ishida

(Received May 10, 2018; Accepted August 10, 2018)

Keywords: PEDOT, vapor-phase polymerization, in situ UV–Vis, thermoelectric conversion

Thin films of poly(3,4-ethylenedioxythiophene) (PEDOT) were fabricated via the vapor-phase polymerization (VPP) of the monomer 3,4-ethylenedioxythiophene (EDOT) with FeCl3·6H2O as the oxidant. The doping level and electrical properties of the VPP-PEDOT films were investigated by Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and electrical conductivity measurements. The VPP of EDOT was observed by in situ ultraviolet–visible (UV–Vis) absorption spectroscopy. The results showed that highly doped PEDOT films were formed in the initial stages of VPP, and the doping level increased as the reaction proceeded. The doping level eventually decreased because of the limited amount of the oxidant. Therefore, it was concluded that the doping level of VPP-PEDOT thin films could be changed depending on the initial amount and supply of the oxidant. The thermoelectric properties of the as-synthesized VPP-PEDOT films were also studied, with the aim of applying them as an energy harvester and/or a temperature sensor.

Corresponding author: Kenji Ishida


Cite this article
Yasuko Koshiba, Mana Hirai, Shohei Horike, Masahiro Morimoto, Masahiro Misaki, Tastuya Fukushima, and Kenji Ishida, In situ Monitoring of Vapor-phase Polymerization and Characterization of Poly(3,4-ethylenedioxythiophene) Thin Films, Sens. Mater., Vol. 30, No. 12, 2018, p. 2873-2879.



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