Eu (III) as a probe in titania thin films: The effect of temperature

被引：23

作者：

Rocha, Lucas A. ^{[1
]}

Molina, Eduardo F. ^{[1
]}

Ciuffi, Katia J. ^{[1
]}

Calefi, Paulo S. ^{[1
]}

Nassar, Eduardo J. ^{[1
]}

机构：

[1] Univ Franca, BR-14404600 Franca, SP, Brazil

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2007年 / 101卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

thin films; sol-gel; luminescence; dip-coating;

D O I：

10.1016/j.matchemphys.2006.04.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Titania oxide films doped with europium were prepared by the sol-gel process and deposited on glass substrates by the dip-coating technique. The fluorescence and excitation spectra of the Eu (III) in the films changed as the calcination temperature rose. TiO2:Eu thin films were heat-treated at various temperatures (100, 200, 300, 400 and 500 degrees C), resulting in transparent films. Excitation spectra presented a change in the charge transfer band (CTB) with increasing temperature. Eu(III) emission spectra exhibited transitions arising mainly from the D-5(0) level to the F-7(J) (J = 0-4) manifolds. The lifetime of the D-5(0) -> F-7(2) transition of the Eu(III) ion increased in the samples heated-treated up to 400 degrees C, while the lifetime of the sample treated at 500 degrees C decreased, probably due to a change in the crystalline structure of the TiO2. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：238 / 241

页数：4

共 47 条

[1] ORGANIC-CHEMISTRY WITHIN CERAMIC MATRICES - DOPED SOL-GEL MATERIALS [J].