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

被引：52

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

页码：51 / 55

页数：5

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