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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:21 |
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Conference: Bucharest University Faculty of Physics 2018 Meeting
Section: Solid State Physics and Materials Science
Title:
BILAYER GADOLINIUM DOPED CERIA GROWN ON YSZ BY PULSED LASER DEPOSITION
Authors:
ROVENA PASCU,GEORGE EPURESCU
Affiliation:
National Institute for Laser, Plasma and Radiation, P.O. Box MG 07, 077125 Măgurele
E-mail
rovenav@gmail.com
Keywords:
GDC/YSZ bilayer, Pulsed Laser Deposition (PLD), XRD, SEM, AFM, SE
Abstract:
In this paper bilayer thin films of 10CGO/8YSZ electrolyte with enhanced O2- conductivity composed of gadolinium doped CeO2 (Ce0,9Gd0,1O2) and yttria stabilized zirconia ZrO2 layers were deposited by Pulsed Laser Deposition (PLD) using various numbers of pulses. This composite has supplementary function in electrochemical devices because 10 CGO can act as interdiffusion barrier with cathode materials. The structure and morphology of these thin films, having thicknesses smaller than 1µm, were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The XRD pattern exhibits cubic fluorite structure with a sharp (111) peak. The grain size was found to depend on the thickness. Optical characterization was carried out by spectroscopic ellipsometry (SE) using the Tauc-Lorentz model.
References:
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2. G. Laukaitis, D. Virbukas, The structural and electrical properties of GDC10 thin films formed by e-beam technique, Solid State Ionics 247, 2013.
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4. N. Pryds, K. Rodrigo, S. Linderoth, J. Schou, On the growth of gadolinia-doped ceria by pulsed laser deposition, Applied Surface Science 255, 2009.
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