Upconversion Luminescence of Er and Yb Codoped NaYF4 Nanoparticles with Metal Shells

被引：66

作者：

Fujii, Minoru ^{[1
]}

Nakano, Taishi ^{[1
]}

Imakita, Kenji ^{[1
]}

Hayashi, Shinji ^{[1
]}

机构：

[1] Kobe Univ, Dept Elect & Elect Engn, Grad Sch Engn, Nada Ku, Kobe, Hyogo 6578501, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2013年 / 117卷 / 02期

关键词：

FLUORESCENCE; ENHANCEMENT; NANOSTRUCTURES; SCATTERING; SURFACE;

D O I：

10.1021/jp309510s

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：

Upconversion photoluminescence (PL) of a composite nanoparticle consisting of an Er and Yb codoped NaYF4 core and a Au shell is studied theoretically and experimentally. We first investigate the effects of a Au shell on the radiative and nonradiative emission rates of a dipole placed in a core, the absorption and scattering cross sections of a composite nanoparticle, and the electric field within a core at the excitation wavelength. We then synthesize the composite nanoparticle and study the PL properties. From the analyses of the PL data in combination with the data obtained by theoretical calculations, the mechanism of the enhancement and quenching of upconversion PL by the formation of a Au shell is studied.

引用

页码：1113 / 1120

页数：8

共 34 条

[1] Enhancement of upconversion luminescence of Er doped Al2O3 films by Ag island films [J].