Simultaneously optimizing fluorescent and paramagnetic properties of bifunctional NaGdF4:Yb3+/Er3+ nanocrystals by crystal field tuning

被引：10

作者：

Wu, Xiaofeng ^{[1
]}

Hu, Shigang ^{[1
]}

Tan, Congbing ^{[2
]}

Liu, Yunxin ^{[2
]}

机构：

[1] Hunan Univ Sci & Technol, Sch Informat & Elect Engn, Xiangtan 411201, Peoples R China

[2] Hunan Univ Sci & Technol, Dept Phys & Elect Sci, Xiangtan 411201, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2015年 / 64卷

关键词：

Fluorides; Chemical synthesis; Luminescence; Magnetic properties; UP-CONVERSION LUMINESCENCE; EMISSION; PHASE; MULTICOLOR; GREEN; RED;

D O I：

10.1016/j.materresbull.2014.12.032

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Here, we show the simultaneous enhancement of fluorescent and paramagnetic properties in bifunctional NaGdF4:Yb3+/Er3+ nanocrystals by crystal field tuning. The energy level splitting calculation indicates, that lanthanide ionic pairs La3+/Lu3+ introduced into the NaGdF4 host can modify the crystal field around emitters (e.g., Er3+ and Tm3+) and sensitizers (e.g., Yb3+) that result in the broadening of crystal field splitting of energy levels and the abundant multi-site distribution of upconversion luminescence. The optimization of the paramagnetic properties in NaGdF4 doped with emitters and sensitizers is ascribed to the lowering of anti-ferromagnetic coupling. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：22 / 26

页数：5

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