The luminescence of Eu2+ in magnesium fluoride crystals

被引：36

作者：

Lizzo, S

Velders, AH

Meijerink, A

Dirksen, GJ

Blasse, G

机构：

[1] Debye Institute, Department of Condensed Matter, Utrecht University, 3508 TA Utrecht

来源：

JOURNAL OF LUMINESCENCE | 1995年 / 65卷 / 06期

关键词：

D O I：

10.1016/0022-2313(95)00080-1

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The luminescence of Eu2+ in MgF2 is reported and discussed. The Eu2+ ion shows 4f(6)5d --> 4f(7)(S-8(7/2)) emission in the blue (maximum at 440 nm). Ar low temperatures a vibrational structure is observed in the excitation and emission spectra. The coupling with low energetic vibrations (27, 64, 110 cm(-1)) is only observed in the emission spectra. In the excitation spectra zero-phonon lines and vibronics for transitions to different F-7(J) levels of the 4f(6)(F-7(J))5d excited state are observed. The t(2g)(5d) triplet is split (approximate to 4000 cm(-1)) into two components. This is explained by a preferential orientation of one of the d orbitals in the Mg2+ chain, which lowers its energy. A comparison is made with the f-d luminescence characteristics of MgF2:Yb2+ and MF(2):Eu2+ (M = Ca,Sr).

引用

页码：303 / 311

页数：9

共 29 条

[1] NATURE OF EU-2 LUMINESCENCE [J].