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

被引：48
|
作者：
Jiang, L
Chang, CK
Mao, DL
Feng, CL
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200030, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Bioorgan & Nat Prod Chem, Shanghai 200032, Peoples R China
来源：
OPTICAL MATERIALS | 2004年 / 27卷 / 01期
基金：
上海市自然科学基金;
关键词：
luminescence; afterglow; phosphor; Rietveld refinement;
D O I：
10.1016/j.optmat.2004.02.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Long lasting alkaline earth silicates, Ca2MgSi2O7:Eu,Dy,Nd was prepared under a reduction atmosphere through solid,late reaction. The obtained phosphor was characterized by means of X-ray diffraction (XRD) and photoluminescence spectrum (PLS). The crystal structure of Ca2MgSi2O7:Eu,Dy,Nd phosphor was refined by Rietveld analysis. The obtained Ca2MgSi2O7:Eu,Dy,Nd phosphor showed a yellow-green emission peaking at 518 nm, which is ascribed to the luminescent emission of the Eu2+ that occupied the octa-coordinated Ca2+ sites in the Ca2MgSi2O7 host. The electron affinity (ea) value for Eu2+ in [EuO8] was calculated to 1.9 eV. The decay profile and the emission spectrum indicated that when the value of Dy/Eu is increasing, there is a concentration quenching of Eu2+. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：51 / 55
页数：5
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