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

Hall effect
microbalances
direct current
Electrodes
electrodes
Electric potential
electric potential
Hall mobility
Conductive films
Carrier transport
Voltage measurement
inks
Ethylene glycol
Amorphous silicon
Ink
nonuniformity
electrical measurement
amorphous silicon
Carrier concentration
Ethylene Glycol

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

DC Hall-effect measurement for inkjet-deposited films of poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) by using microscale gap electrodes. / Ozaki, Shinri; Wada, Yasuo; Noda, Kei.

In: Synthetic Metals, Vol. 215, 01.05.2016, p. 28-34.

Research output: Contribution to journalArticle

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