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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/7697

Title: Electrical properties and defect chemistry of Indium-Doped TiO2: electrical conductivity
Authors: Nowotny, J
Malik, A
Alim, MA
Bak, T
Atanacio, AJ
Keywords: ELECTRIC CONDUCTIVITY
OXYGEN
ELECTRONS
IONS
ENERGY
DATA
Issue Date: 13-Aug-2014
Publisher: The Electrochemical Society
Citation: Nowotny, J., Malik, A., Alim, M. A., Bak, T., & Atanacio, A. J. (2014). Electrical Properties and Defect Chemistry of Indium-Doped TiO2: Electrical Conductivity. Ecs Journal of Solid State Science and Technology, 3(10), P330-P339. doi: http://dx.doi.org/10.1149/2.0191410jss
Abstract: This work reports the electrical conductivity of indium-doped TiO2 at elevated temperatures (1023 K – 1273 K) and in the gas phase of controlled oxygen activity in the range 10−16 Pa<p(O2)<105 Pa. The effect of indium on charge transport in TiO2 is considered in terms of the electrical conductivity components related to electrons, electron holes and ions. It is shown that addition of 0.4 at% of indium to TiO2 results in a shift of the n-p transition point toward lower values of oxygen activity by the factor of about 10. The obtained experimental data in oxidizing conditions are consistent with the mechanism of indium incorporation into the titanium sublattice leading to the formation of acceptor energy levels. However, the determined effect of indium on the ionic conductivity component indicates that indium is incorporated into interstitial sites resulting in the formation of donors. The reported data may be used for processing TiO2 with controlled properties that are desired for specific applications. © 2014, The Electrochemical Society.
URI: http://dx.doi.org/10.1149/2.0191410jss
http://apo.ansto.gov.au/dspace/handle/10238/7697
ISSN: 2162-8769
Appears in Collections:Journal Articles

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