Titanium vacancies in nonstoichiometric TiO2 single crystal

Maria Nowotny; T. Bak; Janusz Nowotny; C. C. Sorrell

doi:10.1002/pssb.200541186

Titanium vacancies in nonstoichiometric TiO₂ single crystal

Maria Nowotny
, T. Bak
, Janusz Nowotny
, C. C. Sorrell

University of New South Wales

Research output: Contribution to journal › Article › peer-review

86 Citations (Scopus)

Abstract

The semiconducting properties of single-crystal TiO₂ and their changes during prolonged oxidation at elevated temperatures and under controlled oxygen activity were monitored using measurements of electrical conductivity and thermoelectric power. Two kinetic regimes were revealed: Regime I - rapid oxidation, associated with the transport of oxygen vacancies, and Regime II - prolonged oxidation, which corresponds to the transport of titanium vacancies. The present data represent the first documented evidence for the formation and transport of titanium vacancies in TiO₂. This finding allows the processing of p-type TiO₂ without the incorporation of aliovalent foreign ions.

Original language	English
Pages (from-to)	R88-R90
Journal	Physica Status Solidi. B: Basic Research
Volume	242
Issue number	11
DOIs	https://doi.org/10.1002/pssb.200541186
Publication status	Published - Sept 2005
Externally published	Yes

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AB - The semiconducting properties of single-crystal TiO2 and their changes during prolonged oxidation at elevated temperatures and under controlled oxygen activity were monitored using measurements of electrical conductivity and thermoelectric power. Two kinetic regimes were revealed: Regime I - rapid oxidation, associated with the transport of oxygen vacancies, and Regime II - prolonged oxidation, which corresponds to the transport of titanium vacancies. The present data represent the first documented evidence for the formation and transport of titanium vacancies in TiO2. This finding allows the processing of p-type TiO2 without the incorporation of aliovalent foreign ions.

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DO - 10.1002/pssb.200541186

M3 - Article

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JF - Physica Status Solidi. B: Basic Research

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ER -

Titanium vacancies in nonstoichiometric TiO₂ single crystal

Abstract

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