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.
基金
supported by National Natural Science Foundations of China(22361132525)
Guangdong Provincial Science&Technology Project(2023A0505050084).
