Monodisperse and core-shell structured NaYF4:Ln@SiO2 (Ln = Yb/Er, Yb/Tm) microspheres: Synthesis and characterization

被引：31

作者：

Tan, Shuyuan ^{[1
]}

Yang, Piaoping ^{[1
]}

Niu, Na ^{[1
]}

Gai, Shili ^{[1
]}

Wang, Jun ^{[1
]}

Jing, Xiaoyan ^{[1
]}

Lin, Jun ^{[2
]}

机构：

[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Harbin 150001, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 490卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

NaYF4:Yb/Er; Colloid; Luminescence; Up-conversion; UP-CONVERSION EMISSION; SOL-GEL PROCESS; LUMINESCENCE PROPERTIES; SILICA SPHERES; PARTICLES; PHOSPHORS; NANOCRYSTALS; GROWTH; BLUE; PHOTOLUMINESCENCE;

D O I：

10.1016/j.jallcom.2009.10.139

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：

In this paper, the core-shell structured NaYF4:Yb/Er@SiO2 and NaYF4:Yb/Tm@SiO2 microspheres were prepared by coating the NaYF4:Yb/Er and NaYF4:Yb/Tm phosphors on the surface of monodisperse silica via a facile colloid thermolysis process, respectively. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectra, Fourier transform IR spectroscopy, and photoluminescence were applied to characterize these samples. The obtained core-shell structured NaYF4:Ln@SiO2 phosphors exhibit a perfect spherical morphology with narrow size distribution and smooth surface. Upon IR excitation at 980 nm, the NaYF4:Yb/Er@SiO2 and NaYF4:Yb/Tm@SiO2 samples exhibit bright green and whitish blue up-conversion (UC) luminescence, respectively. These phosphors show potential applications in the displaying and biological fields. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：684 / 689

页数：6

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