Structure and photoluminescence properties of Er3+-doped TiO2-SiO2 powders prepared by sol-gel method

被引：6

作者：

Zhao Jian-Guo ^{[1
]}

Zhang Wei-Ying ^{[1
]}

Ma Zi-Wei ^{[2
]}

Xie Er-Qing ^{[2
]}

Zhao A-Ke ^{[1
]}

Liu Zhao-Jun ^{[1
]}

机构：

[1] Luoyang Normal Coll, Coll Phys & Elect Informat, Luoyang 471022, Peoples R China

[2] Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China

来源：

CHINESE PHYSICS B | 2011年 / 20卷 / 08期

关键词：

TiO2-SiO2; sol-gel; Raman; photoluminescence; THIN-FILMS; EU3+ IONS; TIO2; NANOPARTICLES; OXIDE; GLASSES; SILICA; ER3+; SIZE;

D O I：

10.1088/1674-1056/20/8/087701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Er3+-doped TiO2-SiO2 powders are prepared by the sol-gel method, and they are characterized by high resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD) spectra, and Raman spectra of the samples. It is shown that the TiO2 nanocrystals are surrounded by an SiO2 glass matrix. The photoluminescence (PL) spectra are recorded at room temperature. A strong green luminescence and less intense red emission are observed in the samples when they are excited at 325 nm. The intensity of the emission, which is related to the defect states, is strongest at the annealing temperature of 800 degrees C. The PL intensity of Er3+ ions increases with increasing Ti/Si ratio due to energy transfer between nano-TiO2 particles and Er3+ ions.

引用

页数：6

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