Transparent oxyhalide glass-ceramic scintillators containing lead-free chloride perovskite nanocrystals for high-resolution and stable X-ray imaging

• • The CsSrCl3:Eu2+ glass-ceramic achieves an internal quantum efficiency of 87.6% and retains 74% of photoluminescence intensity at 493 K, indicating high radiative efficiency and thermal robustness for operation in elevated-temperature environments. • • The glass-ceramic exhibits 85.3% optical transparency at 432 nm and a crystallinity of 15.9%, balancing light transmission and scintillation performance, which is critical for high-resolution imaging without scattering losses. • • After 14 days of water immersion, the material retains 99% of its initial photoluminescence intensity, demonstrating exceptional moisture resistance due to the protective glass matrix, addressing the primary limitation of halide scintillators. • • Under X-ray excitation, the scintillator achieves a spatial resolution of 20 lp mm−1 and a detection limit of 3.7 μGy s−1, with XEL peak intensity 117% of Bi4Ge3O12, enabling high-contrast imaging at low radiation doses, suitable for medical and industrial applications.