Eu3+ luminescence and Gd3+-Eu3+ energy transfer in K5Li2GdF10:Eu3+

被引：30

作者：

Ryba-Romanowski, W ^{[1
]}

Golab, S ^{[1
]}

Dominiak-Dzik, G ^{[1
]}

Solarz, P ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw, Poland

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2002年 / 74卷 / 04期

关键词：

D O I：

10.1007/s003390100917

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polycrystalline samples of europium-doped K5Li2GdF10 have been obtained by a slow cooling of melted compound and investigated using spectroscopy methods. Luminescence from the D-5(2) level of Eu3+ is found to be weak. Intense, visible mission upon excitation into the D-5(2) or higher energy levels has been attributed to overlapping transitions from long-lived D-5(1) and D-5(0) levels. A strong increase of the D-5(0) emission at the expense of the D-5(1) emission occurs between 5 K and 25 K without significant change of the D-5(1) lifetime. To account for this, it is supposed that both the radiative and the nonradiative transition rates are temperature-dependent. Efficient energy transfer from the (6)G(J) levels of Gd3+ to Eu3+ ions has been evidenced by excitation spectra in the VUV region and VUV-excited luminescence. It has been concluded that the cross relaxation contributes to the energy-transfer process.

引用

页码：581 / 586

页数：6

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