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Ce3+和Tb3+掺杂钆-钡-硅酸盐闪烁玻璃的发光性能
Luminescence Properties of Ce3+ and Tb3+ Doped Gd-Ba-silicate Scintillating Glass
- 发光学报 2017年38卷第1期 页码：37-44
- 作者机构：
1. 吉林师范大学 物理学院,吉林 四平,136000
2. 长春理工大学 材料物理与工程学院,吉林 长春,130022
- 作者简介：
- 基金信息：国家自然科学基金（11075026）();四平市科技发展计划（2015054）资助项目()
DOI：10.3788/fgxb20173801.0037
中图分类号： O482.31纸质出版日期：2017-1-5，
收稿日期：2016-6-23，
修回日期：2016-8-25，
扫 描 看 全 文
张勇, 吕景文, 韩冰等. Ce<sup>3+</sup>和Tb<sup>3+</sup>掺杂钆-钡-硅酸盐闪烁玻璃的发光性能[J]. 发光学报, 2017,38(1): 37-44
ZHANG Yong, LYU Jing-wen, HAN Bing etc. Luminescence Properties of Ce<sup>3+</sup> and Tb<sup>3+</sup> Doped Gd-Ba-silicate Scintillating Glass[J]. Chinese Journal of Luminescence, 2017,38(1): 37-44
张勇, 吕景文, 韩冰等. Ce<sup>3+</sup>和Tb<sup>3+</sup>掺杂钆-钡-硅酸盐闪烁玻璃的发光性能[J]. 发光学报, 2017,38(1): 37-44 DOI： 10.3788/fgxb20173801.0037.
ZHANG Yong, LYU Jing-wen, HAN Bing etc. Luminescence Properties of Ce<sup>3+</sup> and Tb<sup>3+</sup> Doped Gd-Ba-silicate Scintillating Glass[J]. Chinese Journal of Luminescence, 2017,38(1): 37-44 DOI： 10.3788/fgxb20173801.0037.
摘要
采用高温熔融法制备Ce
3+
或Tb
3+
单掺和Ce
3+
/Tb
3+
共掺钆-钡-硅酸盐闪烁玻璃。通过透射光谱、光致激发和发射光谱、X射线激发发射光谱及荧光衰减曲线等手段对其发光性能进行研究。实验结果表明：在紫外光的激发下，Tb
3+
掺杂闪烁玻璃发出明亮的绿光（544 nm），而Ce
3+
掺杂闪烁玻璃发出蓝紫光。对于Ce
3+
/Tb
3+
共掺闪烁玻璃，在紫外光和X射线激发下均观察到Ce
3+
离子敏化Tb
3+
离子发光的现象，这是由于存在Ce
3+
Tb
3+
的能量转移。Ce
3+
/Tb
3+
共掺闪烁玻璃的最佳Ce
2
O
3
掺杂摩尔分数为0.2%，此时Ce
3+
离子向Tb
3+
离子的能量传递效率为45.7%。在X射线激发下，Ce
2
O
3
摩尔分数为0.2%的Ce
3+
/Tb
3+
共掺闪烁玻璃在544 nm处的发光强度是Bi
4
Ge
3
O
12
（BGO）闪烁晶体在500 nm处发光强度的4.2倍，积分闪烁效率达到BGO晶体的55.6%，这有利于在高分辨率医学成像中降低辐射剂量。
Abstract
Novel Tb
3+
or Ce
3+
doped and Tb
3+
/Ce
3+
codoped Gd-Ba-silicate scintillating glasses were synthesized by melt-quenching method. The luminescence properties were studied by transmission spectra
photoluminescence excitation and emission spectra
X-ray excited luminescence spectra and luminescence decay curves. The results show that Tb
3+
doped scintillating glasses exhibit bright green emission at about 544 nm and Ce
3+
doped scintillating glasses have a strong purplish-blue light under ultraviolet excitation. For Tb
3+
/Ce
3+
codoped scintillating glasses
Ce
3+
ions can strongly sensitize the luminescence of Tb
3+
ions under both UV and X-ray excitation
which is caused by the energy transfer process from Ce
3+
to Tb
3+
ions. The optimal doping mole fraction of Ce
2
O
3
in Tb
3+
/Ce
3+
codoped scintillating glasses was 0.2%. In this case
the evaluated energy transfer efficiency from Ce
3+
to Tb
3+
is about 45.7%. Under X-ray excitation
not only the intensity of 544 nm emission in Tb
3+
/Ce
3+
codoped scintillating glasses with 0.2% of Ce
2
O
3
was 4.2 times than that of 500 nm emission in the commercial Bi
4
Ge
3
O
12
(BGO) crystals
but also the integral scintillation efficiency was about 55.6% of the BGO crystals. It is beneficial for reducing radiative dose to obtain high-resolution medical X-ray imaging.
关键词
闪烁玻璃Ce3+掺杂Tb3+掺杂能量传递
Keywords
scintillating glassCe3+ dopedTb3+ dopedenergy transfer
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