Flexibly Prepared Tb3+‐Doped Oxyfluoride Glass Scintillators with Enhanced Luminescence for X‐Ray Imaging and Detection

Abstract The development of eco‐friendly, flexibly preparable, and highly efficient glass scintillators is of paramount importance for practical applications in fields such as medical imaging and radiation detection. Herein, a series of Tb 3+ ‐doped oxyfluoride glass is successfully synthesized using the high‐temperature melt‐quenching method. The oxyfluoride glasses exhibit bright green photoluminescence with an internal quantum yield (IQE) of 95.6% and high optical transmittance exceeding 85% at 550 nm. Specifically, the optimized LASNG: 4 mol% Tb 3+ glass demonstrates superior performance, including a significantly enhanced X‐ray excites luminescence (XEL) with an integrated intensity 209% that of Bi 4 Ge 3 O 12 (BGO) and an exceptional spatial resolution of 30 lp∙mm −1 under X‐ray irradiation‐surpassing most of the reported glass scintillators. Additionally, it also exhibits a linear response to X‐ray dose rates with a low detection limit of 1.5 µGy∙s −1 and maintains excellent irradiation stability under continuous X‐ray exposure. This study proposes a promising approach for the development of cost‐effective, high‐resolution, and scalable glass scintillators tailored for X‐ray imaging and detection applications.