Effect of heat treatment on the UV-vis-NIR and PL spectra of TiO2 films

被引：92

作者：

Liu, BS ^{[1
]}

Zhao, XJ ^{[1
]}

Zhao, QN ^{[1
]}

He, X ^{[1
]}

Feng, JY ^{[1
]}

机构：

[1] Wuhan Univ Technol, Minist Educ, Key Lab Silicate Mat Sci & Engn, Wuhan 430070, Hubei, Peoples R China

来源：

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA | 2005年 / 148卷 / 03期

关键词：

heat treatment; TiO2; films; crystal-field theory; magnetron sputtering;

D O I：

10.1016/j.elspec.2005.05.003

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

TiO2 films fabricated by DC reactive magnetron sputtering on quartz glass substrates were annealed in several different ways. The structure and properties of the films were characterized by UV-vis-NIR, PL spectra and X-ray photoelectron spectroscopy. For the annealed samples, it is interesting that a clear absorption peak was found at 496 nm. The analysis of XPS spectra shows that oxygen can diffuse outward from the lattice, resulting in production of Ti3+ and oxygen vacancies. The PL spectra show that the absorption peak at 496 nm is not induced by a transition within the forbidden band gap. Combining the XPS results with the linear combination of atomic orbital molecular orbital (LCAO-MO) theory and crystal-field (CF) theory, we can explain the appearance of this absorption peak. We conclude that the spectroscopic features result from the t(2g)(*) - e(g)(*) electronic transition in these TiO2 films. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：158 / 163

页数：6

共 24 条

[1] Visible-light photocatalysis in nitrogen-doped titanium oxides [J].