Enhancing light yield of Tb^(3+)-doped fluoride nanoscintillator with restricted positive hysteresis for low-dose high-resolution X-ray imaging
作者机构：Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang ProvinceInstitute of Optoelectronic Materials and DevicesChina Jiliang UniversityHangzhou 310018China College of Electronic and Optical Engineering and College of Flexible Electronics(Future Technology)Nanjing University of Posts and TelecommunicationsNanjing 210023China Department of PhysicsZhejiang Normal UniversityJinhua 321004China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2023年第16卷第2期
页 面：3339-3347页
核心收录：
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学]
基 金：supported by Zhejiang Provincial Natural Science Foundation of China(No.LZ21A040002) the National Natural Science Foundation of China(Nos.52172164 and 51872270) the National Natural Science Foundation of China Joint Fund Project(No.U190920054) the Project funded by China Postdoctoral Science Foundation(No.2022T150582)
主 题：nanoscintillators X-ray excited optical luminescence(XEOL)imaging crystal level splitting low-dose high-resolution
摘 要：Developing scintillators with high light yield(LY),superior irradiation stability,and weak afterglow is of significance for the realization of low-dose high-resolution X-ray excited optical luminescence(XEOL)*** doped fluoride nanoparticles possess low toxicity,superior environmental stability,facial fabrication process,and tunable emissions,which are appropriate candidates for the next generation nanoscintillators(NSs).However,the low LY and strong positive hysteresis greatly restrict their practical ***,we propose an effective strategy that engineers energy gap to significantly enhance the *** results verify that the tetragonal LiLuF4 host benefits the crystal level splitting of Tb^(3+)ions,which greatly promotes the electrons population on the Tb^(3+):5D4 level followed by the enhanced *** LY of LiLuF4:Tb@LiLuF4 NSs is calculated to be~31,169 photons/MeV,which is much higher than the lead halide perovskite colloidal CsPbBr3(~21,000 photons/MeV)and LuAG:Ce(~22,000 photons/MeV)***,the positive hysteresis is remarkably restricted after coating a thin *** X-ray detection limit and spatial resolution are measured to be~21.27 nGy/s and~7.2 lp/mm,*** further verify that this core/shell NS can be employed as scintillating screen to realize XEOL imaging under the low dose rate of 13.86μGy/*** results provide an effective route to develop high performance NSs,which will promote great opportunities for the development of low-dose high-resolution XEOL imaging devices.
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