Luminescent properties of CaMgSi2O6 and Ca2MgSi2O7 phosphors activated by Eu2+, Dy3+ and Nd3+

被引：101

作者：

Jiang, L ^{[1
]}

Chang, CK ^{[1
]}

Mao, DL ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Educ Minist High Temp Mat & High Temp Tests, Open Lab, Shanghai 200030, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2003年 / 360卷 / 1-2期

基金：

上海市自然科学基金;

关键词：

alkaline earth silicates; phosphor; luminescence; long persistence;

D O I：

10.1016/S0925-8388(03)00361-X

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：

Long lasting alkaline earth silicates, CaMgSi2O6:Eu,Dy,Nd, Ca2MgSi2O7:Eu,Dy,Nd and Ca2MgSi2O7:Eu,Dy, were prepared under a reducing atmosphere by a solid-state reaction. The obtained phosphors were characterized by means of X-ray diffraction (XRD) and their photoluminescence spectrum (PLS). The Ca2MgSi2O7:Eu,Dy,Nd phosphor showed a two-peak emission at 447 and 516 nm, while the CaMgSi2O6:Eu,Dy,Nd phosphor generated only one peak emission at 447 nm. This phenomenon is due to the different lattice sites occupied by Eu2+ in the Ca2MgSi2O7 and CaMgSi2O6 lattices. The electron affinity (ea) values for Eu2+ in [EuO6] and [EuO8] were calculated to be 4.2 and 1.9 eV, respectively. The Nd co-doped phosphor revealed a better afterglow characteristic, indicating that a deeper trap center was formed in the phosphor by the doping of trivalent Nd ions. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：193 / 197

页数：5

共 8 条

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