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1.成都大学 机械工程学院, 四川 成都 610106
2.成都理工大学 材料与化学化工学院, 四川 成都 610059
3.昆明理工大学 材料科学与工程学院, 云南省新材料制备与加工重点实验室, 云南 昆明 650093
4.交通运输部南海航海保障中心 北海航标处, 广西 北海 536000
[ "岳杨(1997-),女,四川绵竹人,硕士研究生,2018年于西南科技大学获得学士学位,主要从事闪烁体成像的研究。yueyang0311@163.com " ]
[ "王婷(1991-),女,四川成都人,博士,研究员,2020年于中国香港理工大学获得博士学位,主要从事高能射线成像以及功能材料相关的研究。wangtkm@foxmail.com " ]
[ "余雪(1981-),女,河南信阳人,博士,教授,博士生导师,2010年于兰州大学获得博士学位,主要从事新型高能射线闪烁体成像、稀土掺杂发光材料多波段光行为的设计与调控、高热稳定性光电器件的探索与性能研究。 E-mail: yuyu6593@126.com" ]
收稿日期:2023-05-07,
修回日期:2023-05-16,
纸质出版日期:2023-09-05
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岳杨,郭龙超,刘昊哲等.双钙钛矿Ba2LuNbO6∶Tb3+闪烁体多模式X射线探测[J].发光学报,2023,44(09):1597-1605.
YUE Yang,GUO Longchao,LIU Haozhe,et al.Multimode X-ray Detection of Double Perovskite Ba2LuNbO6∶Tb3+ Scintillators[J].Chinese Journal of Luminescence,2023,44(09):1597-1605.
岳杨,郭龙超,刘昊哲等.双钙钛矿Ba2LuNbO6∶Tb3+闪烁体多模式X射线探测[J].发光学报,2023,44(09):1597-1605. DOI: 10.37188/CJL.20230121.
YUE Yang,GUO Longchao,LIU Haozhe,et al.Multimode X-ray Detection of Double Perovskite Ba2LuNbO6∶Tb3+ Scintillators[J].Chinese Journal of Luminescence,2023,44(09):1597-1605. DOI: 10.37188/CJL.20230121.
采用高温固相法制备了双钙钛矿结构的Ba
2
LuNbO
6
∶
x
Tb
3+
(
x
= 0.01,0.02,0.05,0.10,0.20)闪烁体材料,并系统地研究了其晶体结构、形貌和X射线激发的光学性能。研究表明,在X射线激发下,Ba
2
LuNbO
6
∶Tb
3+
的发射光谱主要由Tb
3+
的特征发射组成,其中最强发射峰位于545 nm处。X射线发射(RL)强度随Tb
3+
浓度的增加逐渐增大,当
x
= 0.1时发射强度达到最大值。此外,X射线辐照5 min后的热释光(TL)曲线显示该样品存在位于
T
1
(377 K)和
T
2
(460 K)的两个陷阱。其陷阱深度分别为0.754 eV和0.920 eV,这表明该材料具有潜在的X射线信息存储性能。因此,我们可通过加热或者980 nm激光二极管激发,有效诱导读出存储在深陷阱中的载流子,实现高亮度光激励发光(PSL)和热刺激发光(TSL)。基于此,由Ba
2
LuNbO
6
∶Tb
3+
与聚二甲基硅氧烷(PDMS)所制备的柔性闪烁体薄膜,在低X射线剂量辐照下表现出优异的X射线成像分辨率(12.5 lp/mm)以及延时成像特性。以上结果表明,所制备的Ba
2
LuNbO
6
∶0.1Tb
3+
在X射线探测和X射线信息存储方面具有潜在的应用前景。
In this paper, scintillator Ba
2
LuNbO
6
∶Tb
3+
(
x
= 0.01, 0.02, 0.05, 0.10, 0.20) phosphors with double perovskite structure were synthesized by the traditional high temperature solid state method. The crystal structure, morphology, and optical properties of the as-obtained Ba
2
LuNbO
6
∶Tb
3+
phosphors were investigated in detail. Under X-ray excitation, the radiation luminescence (RL) spectra of Ba
2
LuNbO
6
∶0.1Tb
3+
phosphor exhibit the characteristic emissions of Tb
3+
ions, and the strongest emission peak is dominantly located at 545 nm. The RL intensity gradually increases with the increased concentration of Tb
3+
ions, and achieves the optimized intensity when
x
= 0.1. In addition, the thermoluminescence (TL) curve of Ba
2
LuNbO
6
∶0.1Tb
3+
phosphors after X-ray irradiation for 5 min, manifest that there are two deep traps, located at
T
1
(377 K) and
T
2
(460 K), respectively. The corresponding trap depths are respectively calculated to be 0.754 eV and 0.920 eV, which indicates that the as-explored sample performs a potential optical storage performance. Moreover, the captured carriers captured by deep traps could be released induced by thermal stimulus and the 980 nm laser, and then resulting in bright photo-stimulated luminescence (PSL) and thermal-stimulated luminescence (TSL) behaviors, respectively. Furthermore, the flexible scintillator film encapsulated with Ba
2
LuNbO
6
∶Tb
3+
phosphor and PDMS shows high X-ray imaging resolution(12.5 lp/mm) and time-delay imaging characteristics at low radiation dose, demonstrating that the as-fabricated Ba
2
LuNbO
6
∶0.1Tb
3+
phosphors exhibit potential application prospect in X-ray detection and X-ray information storage.
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