Conduction mechanism in indium tin oxide/electroinactive polypyrrole/indium tin oxide sandwich structures

Tetsuya Osaka, Toshihiro Fukuda, Kiyoshi Ouchi, Toshiyuki Momma

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The electrical conduction mechanism for the indium tin oxide (ITO)/polypyrrole (PPy)/ITO sandwich type of metal-insulator-metal element was investigated, where electroinactive PPy polymerized in aqueous NaOH solution was used as an insulator. The ITO/PPy/Au element demonstrated a non-linear J-V response exactly the same as that of the ITO/PPy/ITO element, indicating that the carriers do not come from the interface but the bulk of an insulator. For the temperature dependence of the J-V responses of the ITO/PPy/ITO element, Poole-Frenkel emission is confirmed to be a dominant conduction mechanism. The activation energy of PPy electropolymerized for 60 min was calculated to be 0.46 eV on the basis of Poole-Frenkel emission. The activation energy and the conductivity of the PPy film were dependent on polymerization time.

Original languageEnglish
Pages (from-to)200-202
Number of pages3
JournalThin Solid Films
Volume215
Issue number2
DOIs
Publication statusPublished - 1992 Aug 14

Fingerprint

Sandwich structures
sandwich structures
polypyrroles
Polypyrroles
Tin oxides
indium oxides
Indium
tin oxides
conduction
insulators
Activation energy
Metals
activation energy
indium tin oxide
polypyrrole
Chemical elements
metals
polymerization
Polymerization
aqueous solutions

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Conduction mechanism in indium tin oxide/electroinactive polypyrrole/indium tin oxide sandwich structures. / Osaka, Tetsuya; Fukuda, Toshihiro; Ouchi, Kiyoshi; Momma, Toshiyuki.

In: Thin Solid Films, Vol. 215, No. 2, 14.08.1992, p. 200-202.

Research output: Contribution to journalArticle

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