Electrical properties of niobium-doped titanium dioxide. 1. Defect disorder

被引：60
|
作者：
Sheppard, L. R. [1 ]
Bak, T. [1 ]
Nowotny, J. [1 ]
机构：
[1] Univ New S Wales, Sch Mat Sci & Engn, Ctr Mat Res Energy Convers, Sydney, NSW 2052, Australia
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2006年 / 110卷 / 45期
关键词：
D O I：
10.1021/jp0637025
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The present work reports the electrical conductivity and thermoelectric power for Nb-doped TiO2 at elevated temperatures (1073-1298 K) in the gas phase of controlled oxygen activity, 10(-14) Pa < p(O-2) < 75 kPa. It is shown that in reduced conditions the Nb-doped TiO2 exhibits metallic-type conductivity. This finding paves the way for the development of high-performance photoelectrodes with substantially reduced internal energy losses during charge transport. The present work also determined the equilibrium constant for the formation of oxygen vacancies and titanium vacancies for Nb-doped TiO2.
引用
收藏
页码：22447 / 22454
页数：8
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