Multilevel Encapsulation-Engineered Ultra-Stable Flexible Scintillator Films for High-Resolution X-ray Imaging

• • Achieved photoluminescence quantum yield (PLQY) of 85% in flexible CsPbBr3@Cs4PbBr6/SiO2/PDMS films, surpassing typical perovskite QD films (often <70%) and approaching commercial scintillators, enabling brighter X-ray imaging with lower dose requirements. • • Demonstrated spatial resolution of 12 lp/mm in X-ray imaging, exceeding conventional scintillator screens (typically 5-10 lp/mm), allowing high-resolution detection for medical and industrial non-destructive testing. • • Films maintain emission stability under elevated temperatures, prolonged X-ray irradiation, and extended water immersion, addressing the critical moisture and radiation instability that has hindered perovskite commercialization. • • Multilevel encapsulation (Cs4PbBr6, SiO2, PDMS) synergistically passivates defects and provides robust barriers, achieving a balance between high PLQY and environmental robustness, a key bottleneck for flexible scintillator deployment.