Enhancement of red upconversion emission of cubic phase NaLuF4: Yb3+/Ho3+/Ce3+ nanocrystals

被引：22

作者：

Gao, Wei ^{[1
]}

Dong, Jun ^{[1
]}

Liu, Jihong ^{[1
]}

Yan, Xuewen ^{[1
]}

机构：

[1] Xian Univ Post & Telecommun, Sch Elect Engn, Xian 710121, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2016年 / 80卷

基金：

美国国家科学基金会;

关键词：

Optical materials; Fluorides; transmission electron microscopy (TEM); Optical properties; Luminescence; EARTH FLUORIDE NANOCRYSTALS; TRANSITION-METAL; LUMINESCENCE; MULTICOLOR; LANTHANIDE; FLUORESCENCE; NAYF4-YB; ER; GREEN; YB3+; HO3+;

D O I：

10.1016/j.materresbull.2016.03.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The red upconversion emission of lanthanide-doped fluoride nanocrystals have great potential applications in color display and anticounterfeiting applications, especially for biological imaging and biomedical. In this work, a significant enhancement of red upconversion emission of Ho3+ ions was successfully obtained in the cubic phase NaLuF4 nanocrystals through codoping Ce3+ ions under NIR 980 nm excitation. The ratio of red-to-green emission of Ho3+ ions was enhanced about 10-fold, which is due to two efficient cross relaxation processes derived from Ho3+ and Ce3+ ions promoted the red emission and quenched the green emission. The upconversion emission and luminescent colors of NaLuF4: Yb3+/Ho3+ nanocrystals were carefully investigated by a confocal microscopy setup. The possible upconversion emission mechanism and conversion efficiency of cross relaxation between Ho3+ and Ce3+ ions were discussed in detail. The current study suggests that strong red emission of NaLuF4: Yb3+/Ho3+/Ce3+ nanomaterials can be used for color display and anticounterfeiting techniques. (C) 2016 Published by Elsevier Ltd.

引用

页码：256 / 262

页数：7

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