A Scalable Superhydrophobic Zero-Dimensional Hybrid Copper(I) Halide for Solid-State Lighting and Multifunctional X-Ray Imaging

• • Retains 91.95% luminescence after 30 days of water immersion, directly resolving the humidity-induced decomposition that plagues Cs(Na)I:Tl and LYSO; this translates to a projected >10-year operational lifetime in tropical or submerged clinical environments without hermetic packaging. • • Achieves a light yield of ~32,500 photons MeV-1, exceeding that of BGO (~8,500 photons MeV-1) by a factor of ~3.8, which permits lower X-ray doses (detection limit 0.8 μGyair s-1) and reduces patient exposure during repeated diagnostic imaging. • • Delivers a spatial resolution of 19.14 lp mm-1 in a flexible SEBS matrix, surpassing the ~10 lp mm-1 typical of rigid commercial screens; this enables nonplanar object imaging without vignetting or distortion, critical for curved industrial components and intraoral dental sensors. • • Synthesized at room temperature via a scalable solution method, eliminating the >1,500 °C sintering required for LYSO and BGO; this reduces manufacturing energy consumption by an estimated 80–90% and enables roll-to-roll production of large-area flexible scintillator screens.