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Research articles

ScienceAsia 46 (2020): 178-185 |doi: 10.2306/scienceasia1513-1874.2020.033


Simultaneously tunable luminescence and magnetic properties in bifunctional NaYF4: Yb3+/Er3+ microcrystals


Zhijun Tanga,*, Quan Liua, Xiaofeng Wua, Shigang Hua, Zaifang Xia, Shiping Zhanb, Yunxin Liub,*

 
ABSTRACT:     A series of bifunctional NaYF4 microcrystals doped with Yb3+/Er3+ have been successfully synthesized through a facile hydrothermal method. They have been characterized by XRD, SEM, photoluminescence spectra and the magnetization. These microcrystals can emit ∼540 nm green light from Er3+- 4ƒ n electronic transition 4S3/2- 4 I15/2, ∼657 nm red light from Er3+- 4ƒ n electronic transition 4 F9/2-4 I15/2, and ∼407 nm violet light from Er3+- 4ƒn electronic transition 2H49/2I15/2, under the excitation of 980 nm infrared light. It is found that the red emission is more sensitive to the doping of Yb3+ ion than the green one, leading to the significant increase in the ratio of red emission to green emission with increasing concentration of Yb3+ ion. In addition, the paramagnetic property was remarkably enhanced with increasing concentration of Yb3+ ion which is ascribed to the substitution of nonmagnetic ion Y3+ by the magnetic ion Yb3+ with large magnetic moment.

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a School of Information and Electrical Engineering, Hunan University of Science and Technology, Xiangtan 411201 China
b School of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan 411201 China

* Corresponding author, E-mail: zjtang@hnust.edu.cn, lyunxin@163.com

Received 15 Aug 2019, Accepted 23 Apr 2020