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Issue 18, 2014
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Synthesis, characterization and electrical properties of La0.7Sr0.3Co0.2Fe0.8O3/Gd–CeO2 thin films (≤500 nm)

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Abstract

A simple route toward the synthesis of mesostructured composite La0.7Sr0.3Co0.2Fe0.8O3x/yGd–CeO2 (LSCFx/yGDC) (with x and y representing the volumetric% of LSCF and GDC in the composite films) thin films exhibiting both high electrical conductivities and optimized bicontinuous pore-solid network is reported. Because of the size of the pore wall, the mesostructured composite film is crystalline with particle size in the nanometer range even after a heat-treatment at 700 °C in air. Crystallization of the film was studied by in situ impedance spectroscopy. This technique allows us to define the heat-treatment, the LSCF content in the composite film and the thickness of the film to achieve good electrical conductivity. The highest electrical conductivity of 250 S cm−1 was found for the pure, mesoporous LSCF film at 700 °C.

Graphical abstract: Synthesis, characterization and electrical properties of La0.7Sr0.3Co0.2Fe0.8O3/Gd–CeO2 thin films (≤500 nm)

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Supplementary files

Article information


Submitted
04 Nov 2013
Accepted
10 Feb 2014
First published
11 Feb 2014

J. Mater. Chem. A, 2014,2, 6448-6455
Article type
Paper

Synthesis, characterization and electrical properties of La0.7Sr0.3Co0.2Fe0.8O3/Gd–CeO2 thin films (≤500 nm)

G. Muller, A. Ringuede and C. Laberty-Robert, J. Mater. Chem. A, 2014, 2, 6448
DOI: 10.1039/C3TA14505K

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