Influence of background oxygen pressure on film properties of pulsed laser deposited Y: BaZrO3

Kiho Bae, Dong Young Jang, Sung Min Choi, Byung Kook Kim, Jong Ho Lee, Ji Won Son, Joon Hyung Shim

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Yttrium-doped barium zirconate (Y:BaZrO3, BZY) thin films were prepared using pulsed laser deposition (PLD) on MgO substrates at 700 C by varying the ambient oxygen pressure. The microstructure and electrical properties were then investigated using transmission electron microscopy and electrochemical impedance spectroscopy. Dense, well-crystallized BZY films were produced at ambient oxygen pressures (Pamb,O2) of ≤ 6.67 Pa. At Pamb,O2 ≥ 13.3 Pa, conical amorphous defects and porous microstructures were observed in the films. The conductivity of PLD BZY prepared at Pamb,O2 ≤ 13.3 Pa was measured to be close to that of reference polycrystalline BZY films, and the grain-boundary properties governed the overall ion conduction, with nano-grains being covered by the space charge depletion zones. At Pamb,O2 ≥ 13.3 Pa, microstructural defects significantly degraded the electrical properties.

Original languageEnglish
Pages (from-to)24-31
Number of pages8
JournalThin Solid Films
Volume552
DOIs
Publication statusPublished - 2014 Feb 3

Fingerprint

Pulsed lasers
pulsed lasers
Pulsed laser deposition
Oxygen
pulsed laser deposition
Electric properties
oxygen
Barium zirconate
electrical properties
Yttrium
Defects
microstructure
Microstructure
defects
yttrium
Electrochemical impedance spectroscopy
Electric space charge
barium
space charge
Grain boundaries

Keywords

  • Electrochemical impedance spectroscopy
  • Grain-boundary depletion
  • Oxygen pressure
  • Proton-conducting ceramics
  • Pulse-laser deposition
  • Solid oxide fuel cells
  • Transmission electron microscopy
  • Yttrium-doped barium zirconate

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Influence of background oxygen pressure on film properties of pulsed laser deposited Y : BaZrO3. / Bae, Kiho; Jang, Dong Young; Choi, Sung Min; Kim, Byung Kook; Lee, Jong Ho; Son, Ji Won; Shim, Joon Hyung.

In: Thin Solid Films, Vol. 552, 03.02.2014, p. 24-31.

Research output: Contribution to journalArticle

Bae, Kiho ; Jang, Dong Young ; Choi, Sung Min ; Kim, Byung Kook ; Lee, Jong Ho ; Son, Ji Won ; Shim, Joon Hyung. / Influence of background oxygen pressure on film properties of pulsed laser deposited Y : BaZrO3. In: Thin Solid Films. 2014 ; Vol. 552. pp. 24-31.
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