Visible light emission upon near-infrared excitation in a transparent solution of nanocrystalline β-NaGdF4:Yb3+, Er3+

被引：106

作者：

Aebischer, A

Heer, S

Biner, D

Krämer, K

Haase, M

Güdel, HU

机构：

[1] Univ Bern, Dept Biochem & Chem, CH-3012 Bern, Switzerland

[2] Univ Osnabruck, Dept Chem, D-49076 Osnabruck, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2005年 / 407卷 / 1-3期

关键词：

D O I：

10.1016/j.cplett.2005.03.053

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：

High quality nanocrystals of hexagonal beta-NaGdF4 codoped with Yb3+ and Er3+ were synthesized by controlled precipitation in high boiling organic solvents and characterized by XRD and TEM. The particles of roughly spherical shape and a size of about 30 nm can be transparently dissolved in DMSO. Visible by eye green and red upconversion emission is observed upon near-infrared excitation at 10 233 cm(-1) (977 nm) with a laser power density of 2 kW cm(-2). (c) 2005 Elsevier B.V. All rights reserved.

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页码：124 / 128

页数：5

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