Spectroscopic and structural properties of Ca1-xSrxAl2O4:Eu2+,RE3+ persistent luminescence materials

被引：12

作者：

Aitasalo, T

Hölsä, J

Jungner, H

Krupa, JC

Lahtinen, M

Lastusaari, M

Legendziewicz, J

Niittykoski, J ^{[1
]}

Valkonen, J

机构：

[1] Univ Turku, Dept Chem, FIN-20014 Turku, Finland

[2] Grad Sch Mat Res, Turku, Finland

[3] Univ Helsinki, Dating Lab, FIN-00014 Helsinki, Finland

[4] Inst Phys Nucl, CNRS, IN2P3, F-91406 Orsay, France

[5] Univ Jyvaskyla, Dept Chem, FIN-40351 Jyvaskyla, Finland

[6] Wroclaw B Beirut Univ, Inst Chem, PL-50383 Wroclaw, Poland

来源：

RADIATION EFFECTS AND DEFECTS IN SOLIDS | 2003年 / 158卷 / 1-6期

基金：

芬兰科学院;

关键词：

persistent luminescence; europium; alkaline earth aluminates; cation solid solubility;

D O I：

10.1080/1042015021000052836

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The preparation, structure and luminescence of the Ca1-xSrxAl2O4:Eu2+,RE3+ system were studied. Monoclinic CaAl2O4 was the major phase when the strontium content x was from 0 to 0.6, but hexagonal SrAl2O4 was obtained when x was 0.8 and monoclinic SrAl2O4 when x was 1. Only slight Ca/Sr cation solid solubility was observed. The strontium ions dissolved better into the CaAl2O4 phase than vice versa. Two luminescence bands were observed for mixed compositions, peaking at 440 and 530 nm, corresponding to those of the monoclinic CaAl2O4:Eu2+ and hexagonal SrAl2O4:Eu2+ ones. The persistent luminescence was enhanced by the Ca/Sr replacement. This observation supports the mechanisms where the lattice defects act as traps.

引用

页码：309 / 313

页数：5

共 19 条

[1] OPTICAL AND ELECTRICAL PROPERTIES OF SRAL2O4-EU2+ [J].