Photoluminescence of TiO2 films co-doped with Tb3+/Gd3+ and energy transfer from TiO2/Gd3+ to Tb3+ ions

被引：8

作者：

Sheng, Ye ^{[1
]}

Zhang, Lei ^{[1
]}

Li, Hongbo ^{[1
]}

Xue, Jiwei ^{[1
]}

Zheng, Keyan ^{[1
]}

Guo, Nan ^{[1
]}

Huo, Qisheng ^{[2
]}

Zou, Haifeng ^{[1
]}

机构：

[1] Jilin Univ, Coll Chem, Changchun 130012, Peoples R China

[2] Jilin Univ, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China

来源：

THIN SOLID FILMS | 2011年 / 519卷 / 22期

关键词：

Titanium oxide; Photoluminescence; Gadolinium; Terbium; Energy transfer; SEMICONDUCTOR CLUSTERS; QUANTUM DOTS; THIN-FILMS; NANOCRYSTALS; LUMINESCENCE; MECHANISM; GD3+;

D O I：

10.1016/j.tsf.2011.05.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanometer TiO2 thin films doped with different concentration of Tb were prepared by sol-gel method and characterized by X-ray diffraction (XRD), thermogravimetry-differential thermal analysis (TG-DTA), transmission electron microscopy (TEM) and photoluminescence (PL) spectroscopy. XRD results show preferentially oriented (101) anatase films. TEM image indicates that the TiO2 films consist of TiO2 grains with diameter about 15 nm. Under room temperature, strong visible luminescence of Tb3+ ions due to intra-4f shell transitions are obtained and the PL intensity is found to have a well matching relation with the doping concentration of Tb3+ ions. Concentration quenching of PL occurs when Tb3+ concentration exceeds a certain value (9.2 mol%). Furthermore, the luminescence intensity is improved obviously after co-doping with Gd3+ ions because of the sensitization effects of Gd3+ ions to Tb3+ ions in TiO2 system. The energy transfer mechanism from TiO2 and Gd3+ ions to Tb3+ ions was proposed. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：7966 / 7970

页数：5

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