Carrier transport of conducting polymer PEDOT:PSS investigated by temperature dependence of THz and IR spectra

Yusuke Yamada, Masatsugu Yamashita, Takahiko Sasaki, Hidenori Okuzaki, Chiko Otani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

In this study, we have investigated the temperature dependence of the optical conductivity of poly(3,4-ethylenedioxythiophene): poly(styrene-sulfonate) (PEDOT:PSS) films measured by the combination of THz and infrared-visible spectroscopy to understand the effect of the ethylene glycol (EG) on the carrier transport. The addition of EG to the PEDOT:PSS colloidal dispersion significantly improve the dc conductivity of PEDOT:PSS film due to the increase of the crystallinity and the change of the morphology in PEDOT:PSS films. The temperature dependences of THz conductivities was discussed using the localization modified Drude (LD) model describing the weakly localized carrier behavior and the series sequence of free and hopping carrier (SSFHC) model. LD model analysis suggests that the carrier delocalization by the addition of EG improve the carrier mobility and DC conductivity. On the other hand, SSFHC model revealed that the macroscopic carrier transport of PEDOT:PSS was dominated by the hopping conduction between PEDOT nano-crystals where the metallic transport were realized.

Original languageEnglish
Title of host publication2014 39th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2014
PublisherIEEE Computer Society
ISBN (Electronic)9781479938773
DOIs
Publication statusPublished - 2014 Nov 13
Event39th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2014 - Tucson, United States
Duration: 2014 Sep 142014 Sep 19

Publication series

NameInternational Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
ISSN (Print)2162-2027
ISSN (Electronic)2162-2035

Other

Other39th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2014
Country/TerritoryUnited States
CityTucson
Period14/9/1414/9/19

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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