Metallic TiO 2

L. R. Sheppard; T. Bak; Janusz Nowotny

doi:10.1002/pssa.200622354

Metallic TiO ₂

L. R. Sheppard, T. Bak, Janusz Nowotny

University of New South Wales

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

18 Citations (Scopus)

Abstract

The present work reports the discovery of the effect of metallic-type conduction for Nb-doped TiO ₂ (0.65 at% Nb). This effect was attested by measurements of electrical conductivity at elevated temperatures (973-1223 K) in the gas phase of controlled oxygen activities. It is shown that the temperature coefficient of the mobility of electrons in reduced conditions is negative. This finding paves the way for the development of high-efficiency photoelectrodes for photoelectrochemical hydrogen generation from water using solar energy with substantially reduced internal energy losses for charge transport.

Original language	English
Pages (from-to)	R85-R87
Journal	Physica Status Solidi. A: Applications and Materials Science
Volume	203
Issue number	11
DOIs	https://doi.org/10.1002/pssa.200622354
Publication status	Published - Sept 2006
Externally published	Yes

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AB - The present work reports the discovery of the effect of metallic-type conduction for Nb-doped TiO 2 (0.65 at% Nb). This effect was attested by measurements of electrical conductivity at elevated temperatures (973-1223 K) in the gas phase of controlled oxygen activities. It is shown that the temperature coefficient of the mobility of electrons in reduced conditions is negative. This finding paves the way for the development of high-efficiency photoelectrodes for photoelectrochemical hydrogen generation from water using solar energy with substantially reduced internal energy losses for charge transport.

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Metallic TiO ₂

Abstract

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