Upconversion luminescence of NaYF4:Yb,Er nanocrystals with high uniformity

被引：28

作者：

Ye Yangsen ^{[1
]}

Jiang Zhihao ^{[1
]}

Wang Qizheng ^{[1
]}

Zhu Zishu ^{[1
]}

Wang Xiao ^{[1
]}

Sui Zhilei ^{[1
]}

Dai Rucheng ^{[2
]}

Wang Zhongping ^{[2
]}

Zhang Zengming ^{[2
]}

Ding Zejun ^{[1
,3
]}

机构：

[1] Univ Sci & Technol China, Dept Phys, Hefei 230026, Peoples R China

[2] Univ Sci & Technol China, Ctr Phys Expt, Hefei 230026, Peoples R China

[3] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2014年 / 32卷 / 09期

基金：

中国国家自然科学基金;

关键词：

upconversion luminescence; nanocrystals; NaYF4:Yb; Er; rare earths; TM3+;

D O I：

10.1016/S1002-0721(14)60144-7

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The NaYF4:Yb,Er nanocrystals were synthesized via the thermal decomposition of metal oleate precursors. The nanocrystals in hexagonal structure were highly uniform and in size of 25 nm. The bright upconversion luminescence was observed under the excitation of 980 nm laser and the upconversion emission spectra were investigated at different pump powers. The emission intensity ratio of red light to green light linearly increased with pump power increasing. This result indicated that there existed a large threshold power of saturation pump for the first excitation state in NaYF4:Yb,Er nanocrystals comparing to that in bulk material.

引用

页码：802 / 805

页数：4

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