Multimode X-ray Detection of Double Perovskite Ba2LuNbO6∶Tb3+ Scintillators

YUE Yang; GUO Longchao; LIU Haozhe; BU Weifang; XU Xuhui; XIE Junkui; QIU Guangyu; WANG Ting; YU Xue

doi:10.37188/CJL.20230121

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Multimode X-ray Detection of Double Perovskite Ba₂LuNbO₆∶Tb³⁺ Scintillators

Synthesis and Properties of Materials | 更新时间：2023-09-28

- Multimode X-ray Detection of Double Perovskite Ba₂LuNbO₆∶Tb³⁺ Scintillators
  增强出版
- Chinese Journal of Luminescence Vol. 44, Issue 9, Pages: 1597-1605(2023)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
  
  the National Nature Science Foundation of China （NSFC）(U2241236;61965012;1220041913);Sichuan Natural Science Foundation(2022YFH0108;2022JDJQ0030);Project of Yunnan Provincial Natural Science Foundation(202101AT070126)
- DOI：10.37188/CJL.20230121
  CLC：
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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.

摘要

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。

Abstract

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.

关键词

闪烁体Tb3+离子X射线探测Ba2LuNbO6

Keywords

scintillatorsTb3+ ionsX-ray detectionBa2LuNbO6

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