LUMINESCENCE PROPERTIES OF LAYERED PEROVSKITES ACTIVATED BY EU3+ IONS

被引：65

作者：

TODA, K ^{[1
]}

KAMEO, Y ^{[1
]}

OHTA, M ^{[1
]}

SATO, M ^{[1
]}

机构：

[1] NIIGATA UNIV,FAC ENGN,DEPT CHEM & CHEM ENGN,NIIGATA 95021,JAPAN

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1995年 / 218卷 / 02期

关键词：

LUMINESCENCE; CONCENTRATION QUENCHING; CRYSTAL STRUCTURE; RIETVELD ANALYSIS; LAYERED PEROVSKITE;

D O I：

10.1016/0925-8388(94)01395-0

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：

Dependence of emission intensity on EU(3+) concentration in Na2Gd2(1-x)Eu2xTi3O10 with a triple perovskite layer and NaGd1-xEuxTiO4 with a single perovskite layer was studied. Critical,values for concentration quenching are x=0.40 for Na2Gd2(1-x)Eu2xTi3O10 and x=0.25 for NaGd1-xEuxTiO4. The difference in the critical concentration between both compounds is discussed in terms of their crystal structures determined by the powder X-ray diffraction patterns using the Rietveld method. The concentration quenching found in these compounds can be explained by means of a percolation model with nearly two-dimensional interactions between EU(3+) sites in the host lattice.

引用

页码：228 / 232

页数：5

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