Impedance spectroscopic studies of the electric conduction in polycrystalline β-Ga2O3

G. Kiss, K. Kovacs, I. V. Perczel, K. Josepovits, M. Fleischer, H. Meixner, F. Réti

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Impedance spectroscopy is used to distinguish the bulk and grain-boundary conduction phenomena in a nonstoichiometric, polycrystalline β-Ga2O3 thin layer with a grain size of 30 nm, between 567 and 790 °C. When oxygen is present, between 567 and 630 °C, the width of the depletion layer exceeds the half-diameter of the grains, and the grain is completely depleted. However, as the effective Debye length decreases with increasing temperature, above 630 °C, the grain is not completely depleted. The conduction mechanism in the bulk is the same in the whole temperature range studied. The activation energy is determined to be 1.2 eV. However, the grain boundary conduction mechanism changes around 700 °C.

Original languageEnglish
Pages (from-to)2644-2646
Number of pages3
JournalJournal of the Electrochemical Society
Volume147
Issue number7
DOIs
Publication statusPublished - Jul 2000

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impedance
conduction
Grain boundaries
grain boundaries
Debye length
depletion
Activation energy
grain size
Spectroscopy
Oxygen
activation energy
Temperature
temperature
oxygen
spectroscopy

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Impedance spectroscopic studies of the electric conduction in polycrystalline β-Ga2O3. / Kiss, G.; Kovacs, K.; Perczel, I. V.; Josepovits, K.; Fleischer, M.; Meixner, H.; Réti, F.

In: Journal of the Electrochemical Society, Vol. 147, No. 7, 07.2000, p. 2644-2646.

Research output: Contribution to journalArticle

Kiss, G. ; Kovacs, K. ; Perczel, I. V. ; Josepovits, K. ; Fleischer, M. ; Meixner, H. ; Réti, F. / Impedance spectroscopic studies of the electric conduction in polycrystalline β-Ga2O3. In: Journal of the Electrochemical Society. 2000 ; Vol. 147, No. 7. pp. 2644-2646.
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