Comparative study on upconversion luminescence and temperature sensing of α- and β-NaYF4:Yb3+/Er3+ nano-/micro-crystals derived from a microwave-assisted hydrothermal route

被引：53

作者：

Tong, Lili ^{[1
]}

Li, Xiangping ^{[1
]}

Hua, Ruinian ^{[2
]}

Li, Xuejing ^{[1
]}

Zheng, Hui ^{[1
]}

Sun, Jiashi ^{[1
]}

Zhang, Jinsu ^{[1
]}

Cheng, Lihong ^{[1
]}

Chen, Baojiu ^{[1
]}

机构：

[1] Dalian Maritime Univ, Dept Phys, Dalian 116026, Peoples R China

[2] Dalian Nationalities Univ, Coll Life Sci, Dalian 116600, Peoples R China

来源：

JOURNAL OF LUMINESCENCE | 2015年 / 167卷

基金：

中国国家自然科学基金;

关键词：

Phosphor; Upconversion luminescence; Temperature sensing; Microwave-assisted hydrothermal; CONTROLLABLE SYNTHESIS; NANOCRYSTALS; PHASE; NAYF4; YB3+; GREEN; LASER; TM3+;

D O I：

10.1016/j.jlumin.2015.07.017

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Yb3+/Er3+ co-doped alpha- and beta-phase NaYF4 nano-/micro-crystals were prepared through a microwave-assisted hydrothermal route. The crystal structure and microscopic morphology of the samples were characterized by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM). Frequency upconverted emissions from the two thermally coupled excited state H-2(11/2) and S-4(3/2) levels of Er3+ in both phases of phosphors were recorded at temperatures ranging from room temperature to 573 K under 980 nm infrared laser excitation. The time scanning upconversion spectra were investigated in detail to reveal the thermal effect induced by laser irradiation and the luminescent thermal stability of the two phases NaYF4 polycrystals. Comparison of the upconversion luminescence and the sensitivity between the two phases NaYF4 polycrystals indicated that beta-phase NaYF4 won much stronger. luminescent intensity, better luminescent thermal stability, and higher temperature sensitivity. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：386 / 390

页数：5

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