期刊
SOLID STATE IONICS
卷 185, 期 1, 页码 32-41出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2011.01.008
关键词
Thin films; Ion conduction; YSZ; Pulsed-laser deposition; Impedance spectroscopy; Grain boundaries
资金
- Austrian Science Fund (FWF) [P19348-N17]
- Austrian Science Fund (FWF) [P19348] Funding Source: Austrian Science Fund (FWF)
An improved electrode geometry is proposed to study thin ion conducting films by impedance spectroscopy. It is shown that long, thin, and closely spaced electrodes arranged interdigitally allow a separation of grain and grain boundary effects also in very thin films. This separation is shown to be successful for yttria stabilized zirconia (YSZ) layers thinner than 20 nm. In a series of experiments it is demonstrated that the extracted parameters correspond to the YSZ grain boundary and grain bulk resistances or to grain boundary and substrate capacitances. Results also show that our YSZ films produced by pulsed-laser deposition (PLD) on sapphire substrates exhibit a bulk conductivity which is very close to that of macroscopic YSZ samples. (c) 2011 Elsevier B.V. All rights reserved.
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