Size-effect on concentration quenching in Yb3+-doped Y3Al5O12 nano-crystals

被引：27

作者：

Amami, J. ^{[1
]}

Hreniak, D. ^{[2
]}

Guyot, Y. ^{[1
]}

Zhao, W. ^{[1
,3
]}

Boulon, G. ^{[1
]}

机构：

[1] Univ Lyon 1, CNRS, UMR 5620, F-69622 Villeurbanne, France

[2] Polish Acad Sci, Inst Low Temp & Struct Res, Wroclaw, Poland

[3] Univ Sci & Technol China, Dept Phys, Hefei 230026, Peoples R China

来源：

JOURNAL OF LUMINESCENCE | 2010年 / 130卷 / 04期

关键词：

Yb3+; YAG; Nano-crystals; size-effect; Luminescence; Quenching; SOLID-STATE LASERS; LUMINESCENCE PROPERTIES; EUTECTIC COMPOSITE; YAG CERAMICS; EMISSION; TEMPERATURE; GROWTH; GARNET;

D O I：

10.1016/j.jlumin.2009.11.003

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Ytterbium-doped nano-crystalline powders of yttrium aluminium garnet Y3Al5O12 (Yb3+-doped YAG) have been prepared by a modified Pechini method. The morphology of the annealed materials was observed using SEM images. The structure and the average crystalline grain sizes have been determined by X-ray powder diffraction measurements. An increase in elongated spherical crystalline grain sizes from 20 to 50 nm has been observed with annealing temperature increasing from 800 to 1200 degrees C. The Yb3+ concentration dependence of both luminescence spectra and lifetimes has been investigated and compared with those reported for the Yb3+-doped YAG bulk single crystals. Decays of Yb3+, F-2(5/2) excited state, Much longer in nano-crystalline powders than in bulk single crystals, are discussed in terms of refractive index dependence. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：603 / 610

页数：8

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