X-ray excited ultralong room-temperature phosphorescence for organic afterglow scintillators
Lele Tang, Jie Zan, Hao Peng, Xi Yan, Ye Tao, Dan Tian, Qingqing Yang, Huanhuan Li, Qiushui Chen, Wei Huang, Runfeng Chen
Abstract
We present X-ray-excitable organic ultralong room temperature phosphorescence (X-OURTP) for afterglow scintillators through implanting lone-pair electron involved n-π* transitions and efficient charge transfer characters into H-aggregations of organic crystals. The thus designed X-OURTP molecule exhibits ultralong lifetimes up to 790 ms, high phosphorescence quantum yields of ∼8%, and excellent scintillation stability. These findings will pave the way to the design of organic afterglow scintillators, simulating extensive investigations on the extraordinary X-OURTP.
Topics & Concepts
AfterglowPhosphorescenceScintillatorExcited stateMaterials scienceOptoelectronicsPhotochemistryChemistryAtomic physicsFluorescencePhysicsOpticsDetectorAstrophysicsGamma-ray burstLuminescence and Fluorescent MaterialsAtomic and Subatomic Physics ResearchMedical Imaging Techniques and Applications