Structure and spectroscopic properties of Tb3+/Sm3+ co-doped oxyfluoride glass ceramics containing LiYF4 nanocrystals

被引：15

作者：

Zheng, Bin ^{[1
]}

Cao, Hui ^{[1
]}

Hu, Jianxu ^{[1
]}

Gu, Zhaofeng ^{[1
]}

Zhang, Yuepin ^{[1
]}

机构：

[1] Ningbo Univ, Key Lab Photoelect Mat, Ningbo 315211, Zhejiang, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 768卷

关键词：

Glass ceramics; LiYF4; Luminescence; Energy transfer; LUMINESCENT PROPERTIES; ENERGY-TRANSFER; UP-CONVERSION; WHITE; EMISSION; SM3+; PHOTOLUMINESCENCE; PHOSPHOR; SPECTRA;

D O I：

10.1016/j.jallcom.2018.07.112

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, transparent oxyfluoride glass ceramics containing LiYF4 nanocrystals were successfully synthesized by appropriate heat -treatment on the SiO2-Al2O3-YF3-LiF precursor glass. The average diameter of the LiYF4 nanocrystals is about 16 nm, which has been confirmed by XRD and TEM characterization. Compared with RE3+ (RE = Tb, Sm)-doped glasses, glass ceramics have shown stronger emission intensities due to most rare earth ions have entered LiYF4 nanocrystals with lower phonon energy. A combination of blue, green and orange -red emissions has emerged in Tb3+/Sm3+ co-doped glass ceramics, and white light emission could be realized by varying the proportions of Tb3+ and Sm3+ under UV light excitation. Furthermore, the concentration quenching effect and the Tb3+ -> Sm3+ energy transfer process were investigated in this paper. Our results indicate that the Tb3+/Sm3+ co-doped oxyfluoride glass -ceramics containing LiYF4 nanocrystals show great potential to achieve a white light emission. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：150 / 156

页数：7

共 24 条

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