Dynamics of carrier injection in picene thin-film field-effect transistors with an ionic liquid sheet and ionic liquid gel

Yuya Nagasaki, Ji Hyun Lee, Yoshihiro Kubozono, Takashi Kambe

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We fabricated picene thin-film field-effect transistors (FETs) with an ionic liquid gel and ionic liquid sheet as the gate electrolyte, and then used electron spin resonance (ESR) to investigate the carrier injection process in the organic electric double layer (EDL) FET. The ESR spectra strongly depended on the morphology of gate electrolytes. Three types of carrier injection processes in the EDL-FET were observed by examining the applied-bias time, organic-layer thickness, and gate-voltage dependencies of the electric-field-induced ESR spectrum: (1) interface injection due to electrostatic EDL formation, (2) bulk injection due to penetration of ions (electrochemical bulk doping), and (3) electrochemical reaction. These findings are significant for designing novel materials using the EDL-FET technique because three different carrier injection processes may lead to different physical properties, even in the same organic material.

Original languageEnglish
Pages (from-to)3070-3075
Number of pages6
JournalOrganic Electronics
Volume15
Issue number11
DOIs
Publication statusPublished - Nov 2014

Keywords

  • Electric double layer
  • Electron spin resonance
  • Field-effect transistor
  • Ionic liquid gel
  • Picene

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Dynamics of carrier injection in picene thin-film field-effect transistors with an ionic liquid sheet and ionic liquid gel'. Together they form a unique fingerprint.

  • Cite this