Yb3+ ion as a sensitizer for the upconversion luminescence in nanocrystalline Gd3Ga5O12:Ho3+

被引：118

作者：

Boyer, JC

Vetrone, F

Capobianco, JA

Speghini, A

Bettinelli, M

机构：

[1] Concordia Univ, Dept Chem & Biochem, Montreal, PQ H4B 1R6, Canada

[2] Univ Verona, Dipartimento Sci & Tecnol, I-37134 Verona, Italy

[3] UdR Verona, INSTM, I-37134 Verona, Italy

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 390卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2004.04.047

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of Yb3+ co-doping on the upconversion luminescence in nanocrystalline Gd3Ga5O12:Ho3+ was examined. Strong and efficient NIR to green anti-Stokes luminescence was noted in nanocrystalline Gd3Ga5O12:Ho3+, Yb3+ after excitation into the F-2(5/2) level of Yb3+ with 978 nm radiation. Weaker blue, red and NIR anti-Stokes luminescence was also observed after 978 nm excitation. An enhancement of the red F-5(5) --> I-5(8) luminescence was observed in the anti-Stokes spectrum compared to the Stokes emission spectrum. This enhancement was attributed to two distinct energy transfer upconversion (ETU) mechanisms which preferentially 5 populate the (F-5(4), S-5(2)) and F-5(5) levels. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：403 / 407

页数：5

共 20 条

[1] Investigation of the upconversion processes in nanocrystalline Gd3Ga5O12:Ho3+ [J].