Tuning the transport and thermoelectric properties of In2O3 bulk ceramics through doping at In-site

Bulk ceramics In2−xMxO3, with a metal-like behavior, have been synthesized in air for M=Ti4+, Zr4+, Sn4+, Ta5+, and Nb5+, with rather low solubility limits xℓ, ranging from 0.01 to 0.1. An abrupt increase in the electrical conductivity and of the carrier concentration with x is observed in the monop...

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Bibliographic Details
Published in:Journal of applied physics 2009-09, Vol.106 (5)
Main Authors: Guilmeau, E., Bérardan, D., Simon, Ch, Maignan, A., Raveau, B., Ovono, D. Ovono, Delorme, F.
Format: Article
Language:English
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Summary:Bulk ceramics In2−xMxO3, with a metal-like behavior, have been synthesized in air for M=Ti4+, Zr4+, Sn4+, Ta5+, and Nb5+, with rather low solubility limits xℓ, ranging from 0.01 to 0.1. An abrupt increase in the electrical conductivity and of the carrier concentration with x is observed in the monophasic region (xxℓ) these values do not vary significantly. These results show that the valence of the doping element plays a crucial role in such properties, similar to degenerated semiconductors. Similarly, the thermopower |S| value is correlated with this evolution decreasing as x increases for x
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3197064