Flexible, TADF-Based Organic X-ray Scintillating Films for High-Resolution Imaging

Abstract

X-ray scintillators have drawn extensive attention since their significant applications in science research and daily life. However, most commercial scintillators are based on expensive mechanically rigid inorganic crystalline arrays, which normally bear long-lived afterglow that reduce the resolution in dynamic X-ray monitoring, while traditional organic scintillators have low X-ray absorbance and inefficient exciton utilization. Herein, we report a series of readily-obtained pure-organic single-component scintillators with halogen-enhanced X-ray absorbance, high fluorescence quantum yield and short decay time. They can be easily prepared into flexible and transparent scintillating imaging films with high light yield (approaching 20000 photons MeV-1) and resolution (above 20 line pairs/mm) that among the highest level of organic scintillators reported so far.