Defect and Mixed Conductivity in Nanocrystalline Doped Cerium Oxide |
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Authors: | Toshio Suzuki Igor Kosacki Harlan U Anderson |
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Affiliation: | Electronic Materials Applied Research Center, University of Missouri, Rolla, Missouri 65401 |
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Abstract: | The results obtained from a study on the microstructure and the electrical properties of Gd-doped CeO2 thin films were reported. Dense, nanocrystalline films on sapphire substrates are prepared using a polymeric precursor spin coating technique. The electrical conductivity was studied as a function of temperature and oxygen activity and correlated with the grain size. For nanocrystalline Gd-doped CeO2 thin films, the ionic conductivity increased with decreasing activation energy as the grain size decreased. A conductivity model was developed to analyze P O2 behavior of the electrical conductivity. Using the conductivity model, the hopping energy of electron conduction and the enthalpy of oxygen vacancy formation were determined for different microstructures. |
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Keywords: | defects conductivity cerium/cerium compounds |
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