Absorption spectra of anatase TiO2 single crystals heat-treated under oxygen atmosphere

被引：104
|
作者：
Sekiya, T [1 ]
Ichimura, K [1 ]
Igarashi, M [1 ]
Kurita, S [1 ]
机构：
[1] Yokohama Natl Univ, Fac Engn, Dept Phys, Yokohama, Kanagawa 2408501, Japan
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2000年 / 61卷 / 08期
关键词：
titanium dioxide; crystal structure; optical properties; colour centres; defects;
D O I：
10.1016/S0022-3697(99)00424-2
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Anatase TiO2 single crystals large enough to measure the optical properties have been grown by chemical vapor transport reaction. As-grown crystals having blue color were heat-treated under oxygen atmosphere. The change in crystal color from blue through yellow to colorless depending on oxygen annealing was detected by optical absorption spectra. The blue color is due to free carrier absorption. The yellow color is originated from an oxygen vacancy which is a color center. Models are discussed for these change during the oxygen annealing. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1237 / 1242
页数：6
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