DC Hall-effect measurement for inkjet-deposited films of poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) by using microscale gap electrodes

Shinri Ozaki, Yasuo Wada, Kei Noda

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

DC Hall-effect measurements were performed for inkjet-deposited p-type poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS) films, site-selectively fabricated onto micrometer-scale van der Pauw electrode gap patterns. A commercially-available ink of high conductivity grade PEDOT/PSS was utilized. Carrier concentration and Hall mobility of the PEDOT/PSS containing ethylene glycol were in the order of 1021 cm-3 and 0.1 cm2/(Vs), respectively, derived from the repeated Hall voltage measurements under reversal of current flow and magnetic field. The Hall voltage showed an n-type behavior, while the thermoelectric measurement indicated p-type. This sign anomaly of the Hall voltage, which is often observed in such low-mobility materials as amorphous silicon and chalcogenide glasses, may be due to hopping carrier transport in the PEDOT/PSS, although non-uniformities in the sample structure should be noted. Nonetheless this study suggests that the combination of microscale electrodes and inkjet deposition may be useful in high-sensitivity detection of Hall voltages for organic conducting films.

Original languageEnglish
Pages (from-to)28-34
Number of pages7
JournalSynthetic Metals
Volume215
DOIs
Publication statusPublished - 2016 May 1

    Fingerprint

Keywords

  • Carrier concentration
  • Hall-effect measurement
  • Inkjet deposition
  • Microscale gap electrode
  • PEDOT/PSS

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this