ZnGa2O4:Cr3+: a new red long-lasting phosphor with high brightness

被引：484

作者：

Bessiere, Aurelie ^{[1
,2
]}

Jacquart, Sylvaine ^{[1
,2
]}

Priolkar, Kaustubh ^{[2
]}

Lecointre, Aurelie ^{[1
]}

Viana, Bruno ^{[1
]}

Gourier, Didier ^{[1
]}

机构：

[1] UPMC, Coll France, CNRS,Chim Paristech, Lab Chim Mat Condensee Paris,UMR 7574, F-75231 Paris 05, France

[2] Goa Univ, Dept Phys, Taleigao Plateau 403206, Goa, India

来源：

OPTICS EXPRESS | 2011年 / 19卷 / 11期

关键词：

LUMINESCENCE SPECTRA; OPTICAL-PROPERTIES; N-LINES; SPINEL;

D O I：

10.1364/OE.19.010131

中图分类号：

O43 [光学];

学科分类号：

070207 [光学];

摘要：

ZnGa2O4:Cr3+ is shown to be a new bright red UV excited long-lasting phosphor potentially suitable for in vivo imaging due to its 650 nm-750 nm emission range. Photoluminescence and X-ray excited radioluminescence show the E-2 -> (4)A(2) emission lines of both ideal Cr3+ and Cr3+ distorted by a neighboring antisite defect while long-lasting phosphorescence (LLP) and thermally stimulated luminescence (TSL) almost exclusively occur via distorted Cr3+. The most intense LLP is obtained with a nominal Zn deficiency and is related to a TSL peak at 335K. A mechanism for LLP and TSL is proposed, whereby the antisite defect responsible for the distortion at Cr3+ acts as a deep trap. (C)2011 Optical Society of America

引用

页码：10131 / 10137

页数：7

共 26 条

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