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天津理工大学 材料物理研究所 天津,300384
纸质出版日期:2012-6-10,
网络出版日期:2012-6-10,
收稿日期:2012-2-29,
修回日期:2012-4-4,
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周永亮, 张晓松, 冯志军, 凌志, 李岚. 阳离子对Er<sup>3+</sup>掺杂硼酸盐玻璃结构和发光特性的影响[J]. 发光学报, 2012,(6): 606-610
ZHOU Yong-liang, ZHANG Xiao-song, FENG Zhi-jun, LING Zhi, LI Lan. Influence on The Structure and Luminescence Properties of Er<sup>3+</sup>-doped Borate Glass for Cation[J]. Chinese Journal of Luminescence, 2012,(6): 606-610
周永亮, 张晓松, 冯志军, 凌志, 李岚. 阳离子对Er<sup>3+</sup>掺杂硼酸盐玻璃结构和发光特性的影响[J]. 发光学报, 2012,(6): 606-610 DOI: 10.3788/fgxb20123306.0606.
ZHOU Yong-liang, ZHANG Xiao-song, FENG Zhi-jun, LING Zhi, LI Lan. Influence on The Structure and Luminescence Properties of Er<sup>3+</sup>-doped Borate Glass for Cation[J]. Chinese Journal of Luminescence, 2012,(6): 606-610 DOI: 10.3788/fgxb20123306.0606.
针对Si/Al掺杂量增大使BaO-(1-x)SiO
2
-xAl
2
O
3
-B
2
O
3
-0.005Er
3+
(x=0
0.5
1
摩尔分数)玻璃样品的1 540 nm红外发光和540 nm上转换发光强度呈现相反的变化趋势
讨论了阳离子掺杂对稀土离子周边对称性和电负性变化与荧光行为的内在关系。红外傅里叶透射光谱显示
不同掺杂浓度下样品的最大声子能量没有明显变化
说明光谱随掺杂浓度的变化与玻璃体系的最大声子能量无关。根据Judd-Ofelt理论计算了
4
I
13/2
和
4
S
3/2
能级的光学参数
通过比较两能级的跃迁几率(A)、寿命(
τ
)、荧光分支比(β)和受激发射截面(σ)等光学参数
发现
4
I
13/2
能级和
4
S
3/2
能级的相关参数呈现相反的趋势。最后测试了样品
4
I
13/2
能级下1 540 nm的寿命
进一步从电负性角度考虑了样品的发光效率。理论计算和实验结果相符。
With the Si/Al doping quantity increasing
the intensity of the BaO-(1-x)SiO
2
-xAl
2
O
3
-B
2
O
3
-0.005Er
3+
(x=0
0.5
1
mole fraction) glass samples show the opposite trend at 1 540 nm infrared emitting and 540 nm up-conversion luminescence. We discuss the internal relation between the rare earth ion’s peripheral micro structure and fluorescence behavior. The process of electron transition for up-conversion and infrared emitting are illustrated by the energy diagram.Infrared FTIR transmission spectra show that the maximum phonon energy does not significantly change with the doping concentration. This indicates that the change of spectrum in different concentration is not derived from the influence of the maximum phonon energy. The calculation by Judd-Ofelt theroy shows that the local symmetry around rare earth ions varies with doping quantity of Al
3+
/Si
4+
. Radiative decay rates(A)
the radiative lifetime(τ)
fluorescence branching ratios(β)
and stimulated emission cross section(σ) for 540 nm and 1.54 μm are calculated. The results show that the changes are opposite. Finally
the fluorescence decaying curves of
4
I
13/2
-
4
I
15/2
for Er
3+
in the borate glass samples are characterized
which is consistent with the experimental results.
硼酸盐玻璃红外发光上转换发光Judd-Ofelt理论
borate glassinfrared luminescenceup-conversion luminescenceJudd-Ofelt theory
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