Infrared-excited bright green and red luminescence in La3Ga5.5Ta0.5O14 doped with erbium and ytterbium

被引：18

作者：

Georgescu, S. ^{[1
]}

Toma, O. ^{[1
]}

Voiculescu, A. M. ^{[1
]}

Matei, C. ^{[1
]}

Birjega, R. ^{[1
]}

Petrescu, L. ^{[2
]}

机构：

[1] Natl Inst Plasma & Radiat Phys, Magurele 077125, Jud Ilfov, Romania

[2] Univ Bucharest, Fac Biol, Bucharest 76201, Romania

来源：

PHYSICA B-CONDENSED MATTER | 2012年 / 407卷 / 07期

关键词：

Upconversion; Luminescence; Rare earth; Langatate; Er3+; Yb3+; UP-CONVERSION LUMINESCENCE; RARE-EARTH IONS; SINGLE-CRYSTALS; UPCONVERTING PHOSPHORS; LANGASITE FAMILY; Y2O3; NANOCRYSTALS; LASER; NANOPARTICLES; INTENSITIES;

D O I：

10.1016/j.physb.2012.01.091

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Bright green (at 525 and 550 nm) and red (at 660 nm) luminescence in Er:Yb:La3Ga5.5Ta0.5O14 (LGT) powder synthesized by solid state reaction was obtained by pumping at 936 nm. Yb3+-Er3+ energy transfer processes accounting for population of the (2)H2(11/2), S-4(3/2) and E-4(9/2) Er3+ levels are discussed. The dependence of ratio between the intensities of the green and red luminescence on pump intensity is analyzed. The rather high quantum efficiency (58%) of the (S-4(3/2), (2)H2(11/2)) Er3+ emitting level recommends LGT doped with erbium and ytterbium for upconversion applications. (C) 2012 Elsevier By. All rights reserved.

引用

页码：1124 / 1127

页数：4

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