Luminescence and structural characterization of transparent nanostructured Eu3+-doped LaF3-SiO2 glass-ceramics prepared by sol-gel method

被引：60

作者：

Yanes, A. C.

Del-Castillo, J.

Mendez-Ramos, J.

Rodriguez, V. D. ^{[1
]}

Torres, M. E.

Arbiol, J.

机构：

[1] Univ La Laguna, Dpto Fis Fundamental & Expt Elect & Sistemas, E-38206 Tenerife, Spain

[2] Univ La Laguna, Dpto Fis Bas, E-38206 Tenerife, Spain

[3] Univ Barcelona, Dept Elect, E-08028 Barcelona, Spain

来源：

OPTICAL MATERIALS | 2007年 / 29卷 / 08期

关键词：

D O I：

10.1016/j.optmat.2006.02.021

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Glass-ceramics with composition of 89.9SiO(2)-10LaF(3)-0.1EuF(3) (mol %) were prepared by sol-gel method. LaF3 nanocrystals, precipitated by heat-treatments, were identified by X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM). Besides the well-known red emission of Eu3+ ions, higher energy emissions coming from upper-lying levels D-5(1) and D-5(2) can be observed at room temperature due to the very low phonon energies of the LaF3 matrix. Moreover, from site selective excitation and emission spectra in the temperature range from 13 to 300 K, it is concluded that the fraction of Eu3+ ions partitioned into LaF3 nanocrystals, substituting La (3+) ions, is comparable to the one staying in the SiO2 glassy phase. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：999 / 1003

页数：5

共 18 条

[1] Upconversion properties of a transparent Er3+-Yb3+ co-doped LaF3-SiO2 glass-ceramics prepared by sol-gel method [J].