Upconversion Luminescence of Er3+ Ions in Transparent Germanate Glass Ceramics Containing CaF2 Nanocrystals

被引：8

作者：

Wu Dong ^{[1
,2
]}

Tang Bin ^{[1
]}

Calvez, Laurent ^{[3
]}

Zhang Xiang-Hua ^{[3
]}

Zhang Long ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Key Lab High Power Laser Mat, Shanghai 201800, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

[3] Univ Rennes, Lab Glasses & Ceram, F-35042 Rennes, France

来源：

CHINESE PHYSICS LETTERS | 2010年 / 27卷 / 06期

基金：

中国国家自然科学基金;

关键词：

RARE-EARTH IONS; SPECTROSCOPIC PROPERTIES; MULTIPHONON RELAXATION; NANO-CRYSTALS; INTENSITIES; EMISSION; BEHAVIOR;

D O I：

10.1088/0256-307X/27/6/067804

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The visible upconversion and near-infrared luminescence of Er3+ ions in germanate glass ceramics containing CaF2 nanocrystals are investigated. The nanocrystals are characterized by x-ray diffraction (XRD) and transmission electron microscopy, showing their mean sizes less than 20 nm. High transmittance of the glass ceramics is displayed by absorption spectra. The upconversion luminescence intensity in the glass ceramics increases significantly with increasing temperature. Both the shifts of the XRD peaks and the Stark-split shown in the luminescence spectra indicate the entrance of the Er3+ ions into the CaF2 nanocrystals, which is confirmed by a Judd-Ofelt analysis. Possible mechanisms of the upconversion luminescence are analyzed.

引用

页数：4

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