Luminescence of Eu2+- in silicate host lattices with alkaline earth ions in a row

被引：241

作者：

Poort, SHM

Reijnhoudt, HM

vanderKuip, HOT

Blasse, G

机构：

[1] Debye Institute, Utrecht University, 3508 TA Utrecht

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1996年 / 241卷 / 1-2期

关键词：

luminescence; divalent europium; crystal field;

D O I：

10.1016/0925-8388(96)02324-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The luminescence of Eu2+ in (Ca,Sr)(2)MgSi2O7, MSiO, (M = Ba, Sr, Ca), BaSi2O5, BaMgSiO4, CaMgSiO4 and Sr2LiSiO4F has been studied. In these structures there are chains of alkaline earth ions. In some cases the Eu2+ ion in these chains shows emission at long wavelengths. This effect is due to preferential orientation of a d orbital and fits a model proposed earlier. In (Ca,Sr)(2)MgSi2O7:Eu2+ it is shown that when the cell parameters are increased by replacing (part of) the calcium by strontium ions, the effect of preferential orientation of a d orbital in the chain direction decreases and the Eu2+ emission shifts to shorter wavelengths. However, in SrSiO3:Eu2+ and CaSiO3:Eu2+ the chains of alkaline earth ions are close together and a blue Eu2+ emission is observed. This indicates that preferential orientation of only one d orbital is required to obtain a Eu2+ emission at low energies.

引用

页码：75 / 81

页数：7

共 29 条

[1] SR2LISIO4F - SYNTHESIS, STRUCTURE, AND EU(2+) LUMINESCENCE [J].