Blue and red emission in wide band gap BaZrO3:Yb3+,Tm3+

被引：48

作者：

Borja-Urby, R. ^{[1
]}

Diaz-Torres, L. A. ^{[1
]}

Salas, P. ^{[2
]}

Vega-Gonzalez, M. ^{[3
]}

Angeles-Chavez, C. ^{[4
]}

机构：

[1] AC, Ctr Invest Opt, Leon 37150, Gto, Mexico

[2] Univ Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Queretaro 76000, Mexico

[3] Univ Nacl Autonoma Mexico, Ctr Geociencias, Queretaro 76000, Mexico

[4] Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, Mexico

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2010年 / 174卷 / 1-3期

关键词：

Blue upconversion; Barium zirconate; Wide band gap; UP-CONVERSION; LUMINESCENCE; BAZRO3; PHOTOLUMINESCENCE; GROWTH; OXIDE; PURE;

D O I：

10.1016/j.mseb.2010.04.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Under NIR excitation at 967 intense blue and red photoluminescence (PL) emissions are observed at room temperature in codoped Tm3+-Yb3+ barium zirconate (BaZrO3:Yb,Tm) powders. Powders were prepared by a simple hydrothermal method, and present a wide band gap that depends on the total rare earth content due to the degree of disorder induced in the BaZrO3 lattice by the substitution of the rare earth ions. Rietveld refinements of the XRD patterns indicated the presence of primary nanocrystallites with sizes between 50 and 70 nm depending on the Tm3+ content. Scanning transmission electron microscopy (STEM) shows that these primary particles self-aggregated in larger secondary particles which present a regular morphology with sizes around 1 mu m. The intense blue and red PL emissions in BaZrO3 powders under 967 nm excitation are governed by energy transfer processes from Yb3+ ions to Tm3+ ions and crossrelaxation among Tm3+ ions. (c) 2010 Elsevier B.V. All rights reserved.

引用

页码：169 / 173

页数：5

共 32 条

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