Open AccessOxygen exchange kinetics of epitaxial PrBaCo2O5+δ thin films
Author(s) -
Guntae Kim,
S. Wang,
Allan J. Jacobson,
Zilong Yuan,
Wolfgang Donner,
Chonglin Chen,
Leszek Reimus,
Peter Brodersen,
Charles A. Mims
Publication year - 2006
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.2163257
Subject(s) - kinetics , oxygen , epitaxy , thin film , conductivity , materials science , electrical resistivity and conductivity , pulsed laser deposition , oxide , analytical chemistry (journal) , chemistry , nanotechnology , physics , organic chemistry , layer (electronics) , quantum mechanics , engineering , chromatography , electrical engineering , metallurgy
The oxygen exchange kinetics of thin films of the oxygen-deficient double perovskite PrBa Co2 O5+δ (PBCO) have been determined by electrical conductivity relaxation (ECR) and by oxygen-isotope exchange and depth profiling (IEDP). Microstructural studies indicate that the PBCO films, prepared by pulsed laser deposition, have excellent single-crystal quality and epitaxial nature. The ECR and IEDP measurements reveal that the PBCO films have high electronic conductivity and rapid surface exchange kinetics, although the ECR data indicate the presence of two distinct kinetic pathways. The rapid surface kinetics compared with those of other perovskites suggest the application of PBCO as a cathode material in intermediate-temperature solid oxide fuel cells.open885
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