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Er3+,Yb3+共掺杂的NaYF4荧光粉的制备及下转换发光研究
Synthesis and Down-conversion Luminescence of Er3+,Yb3+ Codoped NaYF4 Phosphors
- 发光学报 2014年35卷第9期 页码：1058-1064
- 作者机构：
河北大学 物理科学与技术学院,河北 保定,071002
- 作者简介：
- 基金信息：国家自然科学基金（50902042）();中国博士后科学基金（20100480840）();河北省自然科学基金（E2010000283）资助项目()
DOI：10.3788/fgxb20143509.1058
中图分类号： O482.31收稿日期：2014-05-28，
修回日期：2014-07-22，
纸质出版日期：2014-09-03
- 稿件说明：
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蔡淑珍, 刘琳琳, 李明明等. Er<sup>3+</sup>,Yb<sup>3+</sup>共掺杂的NaYF<sub>4</sub>荧光粉的制备及下转换发光研究[J]. 发光学报, 2014,35(9): 1058-1064
CAI Shu-zhen, LIU Lin-lin, LI Ming-ming etc. Synthesis and Down-conversion Luminescence of Er<sup>3+</sup>,Yb<sup>3+</sup> Codoped NaYF<sub>4</sub> Phosphors[J]. Chinese Journal of Luminescence, 2014,35(9): 1058-1064
蔡淑珍, 刘琳琳, 李明明等. Er<sup>3+</sup>,Yb<sup>3+</sup>共掺杂的NaYF<sub>4</sub>荧光粉的制备及下转换发光研究[J]. 发光学报, 2014,35(9): 1058-1064 DOI： 10.3788/fgxb20143509.1058.
CAI Shu-zhen, LIU Lin-lin, LI Ming-ming etc. Synthesis and Down-conversion Luminescence of Er<sup>3+</sup>,Yb<sup>3+</sup> Codoped NaYF<sub>4</sub> Phosphors[J]. Chinese Journal of Luminescence, 2014,35(9): 1058-1064 DOI： 10.3788/fgxb20143509.1058.
摘要
采用高温固相法合成了Er
3+
、Yb
3+
共掺杂的NaYF
4
荧光粉。XRD测量数据表明合成的样品为纯相。测量了样品的激发谱和发射谱，证明377 nm的紫外光通过量子剪裁的形式将能量传递给一个Yb
3+
，发射一个975 nm的红外光子，再从
4
F
9/2
能级跃迁到基态发射一个红外光子。测量了377 nm激发下，监测541 nm的发光寿命曲线，计算得到最大的量子效率为126.35%。通过监测Yb
3+
的975 nm的近红外发射，证明了Er
3+
的
4
F
7/2
和
2
H
11/2
能级通过下转换的形式将吸收的485 nm和519 nm的能量传递给Yb
3+
。这种将Er
3+
在可见光波段的多种光子能量传递给Yb
3+
发射975 nm的近红外光子的思想在以前的研究中从未被提出。
Abstract
Er
3+
Yb
3+
doped NaYF
4
phosphors were prepared by high-temperature solid state method. Structures of the samples were investigated by X-ray diffraction. The excitation and emission spectra of the phosphors were measured. The 377 nm photon jumped from
4
G
11/2
to
4
F
9/2
and the energy was transferred to
2
F
5/2
energy level of Yb
3+
. A 975 nm near-infrared photon was thus obtained. Then
the photon in
4
F
9/2
jumped to the ground state and emitted a 670 nm red photon. Furthermore
the luminescence decay curves of 541 nm emission excited by 377 nm were measured
and the quantum efficiencies were calculated. The maximum quantum efficiency was 126.35%. By monitoring the 975 nm emission
the energy transfer from
4
F
7/2
(485 nm) and
2
H
11/2
(519 nm) of Er
3+
to Yb
3+
also occurred by down-conversion. This research has not been done before.
关键词
Keywords
references
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