The Upconversion Luminescence of Er3+/Yb3+/Nd3+ Triply-Doped β-NaYF4 Nanocrystals under 808-nm Excitation

被引：68

作者：

Tian, Lijiao ^{[1
]}

Xu, Zheng ^{[1
]}

Zhao, Suling ^{[1
]}

Cui, Yue ^{[1
]}

Liang, Zhiqin ^{[1
]}

Zhang, Junjie ^{[1
]}

Xu, Xurong ^{[1
]}

机构：

[1] Beijing Jiaotong Univ, Key Lab Luminescence & Opt Informat, Minist Educ, Beijing 100044, Peoples R China

来源：

MATERIALS | 2014年 / 7卷 / 11期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

upconversion; nanoparticles; Nd3+ concentration; mechanism; ENERGY-TRANSFER; IN-VITRO; LANTHANIDE; NANOPHOSPHORS; NANOPARTICLES; EMISSION; PROBES; YB3+;

D O I：

10.3390/ma7117289

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, Nd3+-Yb3+-Er3+-doped beta-NaYF4 nanocrystals with different Nd3+ concentrations are synthesized, and the luminescence properties of the upconversion nanoparticles (UCNPs) have been studied under 808-nm excitation for sensitive biological applications. The upconversion luminescence spectra of NaYF4 nanoparticles with different dopants under 808-nm excitation proves that the Nd3+ ion can absorb the photons effectively, and the Yb3+ (i)on can play the role of an energy-transfer bridging ion between the Nd3+ ion and Er3+ ion. To investigate the effect of the Nd3+ ion, the decay curves of the S-4(3/2) -> I-4(15/2) transition at 540 nm are measured and analyzed. The NaYF4: 20% Yb3+, 2% Er3+, 0.5% Nd3+ nanocrystals have the highest emission intensity among all samples under 808-nm excitation. The UC (upconversion) mechanism under 808-nm excitation is discussed in terms of the experimental results.

引用

页码：7289 / 7303

页数：15

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