TY - JOUR
T1 - A pixelated liquid perovskite array for high-sensitivity and high-resolution X-ray imaging scintillation screens
AU - Hu, Mingzhu
AU - Wang, Yumeng
AU - Hu, Shengpeng
AU - Wang, Zongpeng
AU - Du, Bi
AU - Peng, Yanjun
AU - Yang, Jiawei
AU - Shi, Yunjie
AU - Chen, Dongdong
AU - Chen, Xi
AU - Zhuang, Ziwen
AU - Wang, Zhixun
AU - Chen, Ming
AU - Yang, Jiecheng
AU - Ge, Yongshuai
AU - Wang, Eyu
AU - Wen, Quan
AU - Xiao, Shuang
AU - Ma, Ming
AU - Li, Weimin
AU - Zhang, Jie
AU - Ning, De
AU - Wei, Lei
AU - Yang, Chunlei
N1 - Publisher Copyright:
© 2023 The Royal Society of Chemistry.
PY - 2023/8/31
Y1 - 2023/8/31
N2 - Scintillators with high spatial resolution at a low radiation dose rate are desirable for X-ray medical imaging. A low radiation dose rate can be achieved using a sufficiently thick scintillator layer to absorb the incident X-ray energy completely, however, often at the expense of low spatial resolution due to the issue of optical crosstalk of scintillation light. Therefore, to achieve high sensitivity combined with high-resolution imaging, a thick scintillator with perfect light guiding properties is in high demand. Herein, a new strategy is developed to address this issue by embedding liquid scintillators into lead-containing fiber-optical plates (FOPs, n = 1.5) via the siphon effect. The liquid scintillator is composed of perovskite quantum dots (QDs)/2,5-diphenyloxazole (PPO) and the non-polar high-refractive index (n = 1.66) solvent α-bremnaphthalene. Benefiting from the pixelated and thickness-adjustable scintillators, the proposed CsPbBr3 QDs/PPO liquid scintillator-based X-ray detector achieves a detection limit of 79.1 μGy s−1 and a spatial resolution of 4.6 lp mm−1. In addition, it displays excellent tolerance against radiation (>34 h) and shows outstanding stability under ambient conditions (>160 h). This strategy could also be applied to other liquid scintillators (such as CsPbCl3 QDs and Mn:CsPbCl3 QDs). The combination of high sensitivity, high spatial resolution and stability, easy fabrication and maintenance, and a reusable substrate matrix makes these liquid scintillators a promising candidate for practical X-ray medical imaging applications.
AB - Scintillators with high spatial resolution at a low radiation dose rate are desirable for X-ray medical imaging. A low radiation dose rate can be achieved using a sufficiently thick scintillator layer to absorb the incident X-ray energy completely, however, often at the expense of low spatial resolution due to the issue of optical crosstalk of scintillation light. Therefore, to achieve high sensitivity combined with high-resolution imaging, a thick scintillator with perfect light guiding properties is in high demand. Herein, a new strategy is developed to address this issue by embedding liquid scintillators into lead-containing fiber-optical plates (FOPs, n = 1.5) via the siphon effect. The liquid scintillator is composed of perovskite quantum dots (QDs)/2,5-diphenyloxazole (PPO) and the non-polar high-refractive index (n = 1.66) solvent α-bremnaphthalene. Benefiting from the pixelated and thickness-adjustable scintillators, the proposed CsPbBr3 QDs/PPO liquid scintillator-based X-ray detector achieves a detection limit of 79.1 μGy s−1 and a spatial resolution of 4.6 lp mm−1. In addition, it displays excellent tolerance against radiation (>34 h) and shows outstanding stability under ambient conditions (>160 h). This strategy could also be applied to other liquid scintillators (such as CsPbCl3 QDs and Mn:CsPbCl3 QDs). The combination of high sensitivity, high spatial resolution and stability, easy fabrication and maintenance, and a reusable substrate matrix makes these liquid scintillators a promising candidate for practical X-ray medical imaging applications.
UR - https://www.scopus.com/pages/publications/85173045868
U2 - 10.1039/d3nr02841k
DO - 10.1039/d3nr02841k
M3 - Journal article
C2 - 37721742
AN - SCOPUS:85173045868
SN - 2040-3364
VL - 15
SP - 15635
EP - 15642
JO - Nanoscale
JF - Nanoscale
IS - 38
ER -