Energy transfer in Eu3+ doped scheelites: use as thermographic phosphor

被引：84

作者：

Meert, Katrien W. ^{[1
,2
]}

Morozov, Vladimir A. ^{[3
,4
]}

Abakumov, Artem M. ^{[3
]}

Hadermann, Joke ^{[3
]}

Poelman, Dirk ^{[1
,2
]}

Smet, Philippe F. ^{[1
,2
]}

机构：

[1] Univ Ghent, Dept Solid State Sci, LumiLab, B-9000 Ghent, Belgium

[2] Univ Ghent, Ctr Nano & Biophoton NB Photon, B-9000 Ghent, Belgium

[3] Univ Antwerp, EMAT, B-2020 Antwerp, Belgium

[4] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119991, Russia

来源：

OPTICS EXPRESS | 2014年 / 22卷 / 09期

基金：

俄罗斯基础研究基金会; 比利时弗兰德研究基金会;

关键词：

LUMINESCENCE PROPERTIES; TEMPERATURE MEASUREMENTS; INTENSITY RATIO; RED PHOSPHORS; THERMOMETRY; FLUORESCENCE; CA; SENSITIVITY; EMISSIONS; ER3+;

D O I：

10.1364/OE.22.00A961

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper the luminescence of the scheelite-based CaGd2(1-x)Eu2x(WO4)(4) solid solutions is investigated as a function of the Eu content and temperature. All phosphors show intense red luminescence due to the D-5(0) - F-7(2) transition in Eu3+, along with other transitions from the D-5(1) and D-5(0) excited states. For high Eu3+ concentrations the intensity ratio of the emission originating from the D-5(1) and D-5(0) levels has a non-conventional temperature dependence, which could be explained by a phonon-assisted cross-relaxation process. It is demonstrated that this intensity ratio can be used as a measure of temperature with high spatial resolution, allowing the use of these scheelites as thermographic phosphor. The main disadvantage of many thermographic phosphors, a decreasing signal for increasing temperature, is absent. (C)2014 Optical Society of America

引用

页码：A961 / A972

页数：12

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