Title
Growth And Characterization Of Highly Oriented Gadolinia-Doped Ceria (111) Thin Films On Zirconia (111)/Sapphire (0001) Substrates
Keywords
Highly oriented gadolinia-doped ceria; Ionic conductivity; Solid oxide fuel cell; Transmission electron microscopy; X-ray diffraction pole-figure analysis
Abstract
Highly-oriented pure and gadolinia-doped ceria thin films have been grown on pure and zirconia (ZrO2) (111)-buffered sapphire (Al2O3) (0001) substrates using oxygen plasma-assisted molecular beam epitaxy to understand the oxygen ionic transport processes in ceria based oxide thin films. Gadolinia-doped ceria films grown on sapphire substrate show polycrystalline features due to structural deformations resulting from the large lattice mismatch between the Al2O3 (0001) substrate and the ceria films. In contrast, the films, grown on a thin layer of ZrO2 (111) buffered sapphire substrate, appear to be highly oriented in nature with predominant double domain (111) orientation. Oxygen ionic conductivity of these gadolinia-doped ceria films was measured as a function of gadolinium concentration and found to be efficient at relatively lower temperature operation compared to that of bulk polycrystalline, single crystalline yttria stabilized zirconia and gadolinia-doped polycrystalline ceria. Relative improvement in ionic conductivity of highly oriented gadolinia-doped ceria films (in the lower temperature regime) can be ascribed to the increased oxygen vacancies due to presence of Gd as well as high quality of the oriented thin films. © 2007 Elsevier B.V. All rights reserved.
Publication Date
7-31-2008
Publication Title
Thin Solid Films
Volume
516
Issue
18
Number of Pages
6088-6094
Document Type
Article
Personal Identifier
scopus
DOI Link
https://doi.org/10.1016/j.tsf.2007.11.007
Copyright Status
Unknown
Socpus ID
44649093520 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/44649093520
STARS Citation
Bera, Debasis; Kuchibhatla, Satyanarayana V.N.T.; Azad, S.; Saraf, L.; and Wang, C. M., "Growth And Characterization Of Highly Oriented Gadolinia-Doped Ceria (111) Thin Films On Zirconia (111)/Sapphire (0001) Substrates" (2008). Scopus Export 2000s. 10001.
https://stars.library.ucf.edu/scopus2000/10001