Enhanced emission from Eu2+ ions in sol-gel derived Al2O3-SiO2 glasses

被引：73

作者：

Nogami, M

Abe, Y

机构：

[1] Dept. of Mat. Sci. and Engineering, Nagoya Institute of Technology, Showa, Nagoya

来源：

APPLIED PHYSICS LETTERS | 1996年 / 69卷 / 25期

关键词：

D O I：

10.1063/1.116995

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Eu2+ ions were incorporated in SiO2 and Al2O3-SiO2 glasses using a sol-gel process of Si(OC2H5)(4), Al(OC4H9sec)(3), and EuCl3, 6H(2)O. Glasses incorporated with the Eu2+ ions showed the emission with peak at similar to 22000 cm(-1) due to 4f(6)5d-->4f(7)(S-8(7/2)) transition of the Eu2+ ions. 1Al(2)O(3) . 99SiO(2) (mol %) glass had an intense emission, 250 times larger than that of 100SiO(2) glass. The covalency of the Eu-O bonds is decreased by the Al3+ ions. We concluded that this weak covalency causes the offset of the excited 4f(6)5d level to be small, resulting in an increase in the probability of the radiative relaxation from the 4f(6)5d to 4f(7)(S-8(7/2)) level. (C) 1996 American Institute of Physics.

引用

页码：3776 / 3778

页数：3

共 17 条

[1] THE LUMINESCENCE OF YTTERBIUM(II) IN STRONTIUM TETRABORATE [J].