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Tm3+浓度对Y2（MoO4）3：Tm3+，Yb3+荧光粉上转换发光性质的影响
Effect of Tm3+ Concentration on Upconversion Fluorescence in Y2(MoO4)3：Tm3+, Yb3+ Phosphors
- 发光学报 2014年35卷第8期 页码：905-910
- 作者机构：
大连海事大学 物理系,辽宁 大连,116026
- 作者简介：
- 基金信息：国家自然科学基金（11104023，11374044，11104024）();中央高校基本科研业务费专项资金 （3132014087，3132014327）资助项目()
DOI：10.3788/fgxb20143508.0905
中图分类号： O611.4;O482.31收稿日期：2014-04-25，
修回日期：2014-05-27，
纸质出版日期：2014-08-03
- 稿件说明：
移动端阅览
李香萍, 佟莉莉, 程丽红等. Tm<sup>3+</sup>浓度对Y<sub>2</sub>（MoO<sub>4</sub>）<sub>3</sub>：Tm<sup>3+</sup>，Yb<sup>3+</sup>荧光粉上转换发光性质的影响[J]. 发光学报, 2014,35(8): 905-910
LI Xiang-ping, TONG Li-li, CHENG Li-hong etc. Effect of Tm<sup>3+</sup> Concentration on Upconversion Fluorescence in Y<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub>：Tm<sup>3+</sup>, Yb<sup>3+</sup> Phosphors[J]. Chinese Journal of Luminescence, 2014,35(8): 905-910
李香萍, 佟莉莉, 程丽红等. Tm<sup>3+</sup>浓度对Y<sub>2</sub>（MoO<sub>4</sub>）<sub>3</sub>：Tm<sup>3+</sup>，Yb<sup>3+</sup>荧光粉上转换发光性质的影响[J]. 发光学报, 2014,35(8): 905-910 DOI： 10.3788/fgxb20143508.0905.
LI Xiang-ping, TONG Li-li, CHENG Li-hong etc. Effect of Tm<sup>3+</sup> Concentration on Upconversion Fluorescence in Y<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub>：Tm<sup>3+</sup>, Yb<sup>3+</sup> Phosphors[J]. Chinese Journal of Luminescence, 2014,35(8): 905-910 DOI： 10.3788/fgxb20143508.0905.
摘要
采用传统的高温固相反应法合成了Tm
3+
/Yb
3+
共掺杂Y
2
（MoO
4
）
3
系列荧光粉。XRD结果表明合成的样品为相纯度好的Y
2
（MoO
4
）
3
。在980 nm光激发下，样品具有较强的位于487 nm和800 nm的蓝色和近红外发射，同时伴有较弱的位于649 nm的红光发射。它们分别来自于Tm
3+
的
1
G
4
3
H
6
、
3
H
4
3
H
6
和
1
G
4
3
F
4
跃迁。根据功率相关的上转换发射和能级图分析了Tm
3+
的上转换发光机制。结果表明，
1
G
4
和
3
H
4
能级的布居分别来自于三光子和两光子的能量传递上转换。此外，随着Tm
3+
浓度的增加，蓝色、红色和近红外发射带均呈先增加后降低的趋势，即发生了浓度猝灭。同时，蓝光发射和近红外发射的强度比随Tm
3+
掺杂浓度的增加而减小。
Abstract
Tm
3+
/Yb
3+
co-doped Y
2
(MoO
4
)
3
phosphors with various Tm
3+
concentrations were prepared
via
a traditional high temperature solid state reaction method using NH
4
HF
2
as a flux. The microstructure analysis by means of X-ray diffraction revealed that the as-synthesized samples presented a pure phase Y
2
(MoO
4
)
3
. Under 980 nm excitation
intense blue
near infrared (NIR) and weak red upconversion emissions which centered at 487
800 and 649 nm were observed
and these emissions were corresponding to the
1
G
4
3
H
6
3
H
4
3
H
6
and
1
G
4
3
F
4
transitions of Tm
3+
respectively. The upconversion luminescence mechanisms of Y
2
(MoO
4
)
3
:Tm
3+
Yb
3+
phosphors were analyzed based upon the power dependent upconversion emissions. The results show that the populations of
1
G
4
and
3
H
4
levels come from three-and two-photon energy transfer upconversion processes
respectively. The possible upconversion mechanisms for the blue
red and NIR emissions were discussed based on the energy level diagrams of Tm
3+
and Yb
3+
. In addition
with the increase of Tm
3+
concentration
all of the emission bands obviously increase firstly and then decrease
which can be attributed to the concentration quenching. Meanwhile
the intensity ratio of the blue emission and the NIR emission decreases with the increase of Tm
3+
concentration.
关键词
Keywords
references
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