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白色荧光粉CaF2:Yb3+/Eu3+/La3+的制备及其上转换发光特性
Synthesis and Upconversion Luminescence Properties of White Phosphor CaF2: Yb3+/Eu3+/La3+
- 发光学报 2020年41卷第2期 页码：153-159
- 作者机构：
1. 长江师范学院 化学化工学院, 重庆 408100
2. 吉林大学 集成光电子学国家重点联合实验室,吉林 长春,130012
- 作者简介：
- 基金信息：国家自然科学基金（21705009）();长江师范学院引进人才科研启动项目（01160002）资助()
DOI：10.3788/fgxb20204102.0153
中图分类号： O433纸质出版日期：2020-2-5，
网络出版日期：2019-10-30，
收稿日期：2019-9-29，
修回日期：2019-10-23，
扫 描 看 全 文
李洋洋, 李鑫, 周昊等. 白色荧光粉CaF<sub>2</sub>:Yb<sup>3+</sup>/Eu<sup>3+</sup>/La<sup>3+</sup>的制备及其上转换发光特性[J]. 发光学报, 2020,41(2): 153-159
LI Yang-yang, LI Xin, ZHOU Hao etc. Synthesis and Upconversion Luminescence Properties of White Phosphor CaF<sub>2</sub>: Yb<sup>3+</sup>/Eu<sup>3+</sup>/La<sup>3+</sup>[J]. Chinese Journal of Luminescence, 2020,41(2): 153-159
李洋洋, 李鑫, 周昊等. 白色荧光粉CaF<sub>2</sub>:Yb<sup>3+</sup>/Eu<sup>3+</sup>/La<sup>3+</sup>的制备及其上转换发光特性[J]. 发光学报, 2020,41(2): 153-159 DOI： 10.3788/fgxb20204102.0153.
LI Yang-yang, LI Xin, ZHOU Hao etc. Synthesis and Upconversion Luminescence Properties of White Phosphor CaF<sub>2</sub>: Yb<sup>3+</sup>/Eu<sup>3+</sup>/La<sup>3+</sup>[J]. Chinese Journal of Luminescence, 2020,41(2): 153-159 DOI： 10.3788/fgxb20204102.0153.
摘要
采用改进的两步高温固相熔融法制备了Yb
3+
、Eu
3+
、La
3+
共掺杂CaF
2
的上转换荧光粉。基于荧光猝灭原理，通过改变La
3+
掺杂浓度来调节CaF
2
:Yb
3+
/Eu
3+
材料的发光性能，并在980 nm近红外光激发下，获得了该材料的白色上转换发光（UCL）。在该发光体系中，Yb
3+
不仅起到了敏化Eu
3+
的作用，同时，Yb
3+
二聚体（Yb
3+
-dimer）自身合作发出波长范围480~540 nm的绿色荧光。而白光三基色中的绿光正是来自Yb
3+
二聚体的合作发光。Eu
3+
则作为激活剂，同时发出红色和蓝色荧光。荧光寿命测试结果表明Yb
3+
-dimer与Eu
3+
之间存在有效的能量传递。值得注意的是，在980 nm激光激发下，1% La
3+
掺杂的样品表现出最佳的红、绿、蓝三基色光比列，实现了材料的上转换白光发射，其色度坐标为（0.311，0.340）。
Abstract
Yb
3+
Eu
3+
La
3+
co-doped CaF
2
upconversion phosphors were synthesized by a modified two-step high temperature solid phase method. On the basis of fluorescence quenching theory
the luminescence properties of CaF
2
:Yb
3+
/Eu
3+
materials were adjusted by changing the doping concentrations of La
3+
and the white upconversion luminescence (UCL) of these materials was obtained under a 980 nm laser. In this UCL system
Yb
3+
not only sensitizes Eu
3+
but also cooperates with neighboring Yb
3+
to emit green luminescence in the wavelength range of 480-540 nm. This green luminescence just happens to be an important component of white light. In addition
Eu
3+
ions act as activators and emit both red and blue luminescence
providing two other elements in the tri-color light. Fluorescence dynamical analysis indicates that an efficient energy transfer exists between the Yb
3+
-dimers and Eu
3+
ions. It is remarkable that the white UCL can be achieved from the 1% La
3+
-doped sample
and the color coordinate is (0.311
0.340).
关键词
上转换荧光猝灭合作发光白光
Keywords
upconversionfluorescence quenchingcooperative luminescencewhite luminescence
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