Hybrid Eu(II)-bromide scintillators with efficient 5d-4f bandgap transition for X-ray imaging  

作　　者：Kai Han Jiance Jin Yuzhen Wang Xinquan Zhou Yongsheng Sun Lihan Chen Zhiguo Xia 

机构地区：[1]The State Key Laboratory of Luminescent Materials and Devices,Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques,Guangdong Engineering Technology Research and Development Centre of Special Optical Fiber Materials and Devices,School of Physics and Optoelectronics,South China University of Technology,Guangzhou,China [2]School of Materials Science and Engineering,South China University of Technology,Guangzhou,China

出　　处：《Light(Science & Applications)》2024年第10期2321-2330,共10页光（科学与应用)（英文版）

基　　金：supported by National Natural Science Foundations of China(22361132525);Guangdong Provincial Science&Technology Project(2023A0505050084).

摘　　要：Luminescent metal halides are attracting growing attention as scintillators for X-ray imaging in safety inspection,medical diagnosis,etc.Here we present brand-new hybrid Eu(II)-bromide scintillators,1D type[Et4N]EuBr3·MeOH and 0D type[Me4N]6Eu5Br16·MeOH,with spin-allowed 5d-4f bandgap transition emission toward simplified carrier transport during scintillation process.The 1D/0D structures with edge/face-sharing[EuBr6]4−octahedra further contribute to lowing bandgaps and enhancing quantum confinement effect,enabling efficient scintillation performance(light yield~73100±800 Ph MeV^(−1),detect limit~18.6 nGy s^(−1),X-ray afterglow~1%@9.6μs).We demonstrate the X-ray imaging with 27.3 lp mm^(−1) resolution by embedding Eu(II)-based scintillators into AAO film.Our results create the new family of low-dimensional rare-earth-based halides for scintillation and related optoelectronic applications.

关 键 词：process. BROMIDE TRANSITION 

分 类 号：R445.4[医药卫生—影像医学与核医学]