Robust Organogel Scintillator for Self‐healing and Ultra‐flexible X‐ray Imaging

Abstract Metal halide scintillators serve as promising candidates for X‐ray detection due to their high attenuation coefficients, high light yields, and low‐cost solution‐processable characteristics. However, the issues of humidity/thermal quenching and mechanical fragility, remain obstacles to the broad and diversified development of metal halide scintillators. Here, this work reports a lead‐free, water‐stable, stretchable, and self‐healing (ethylenebis‐triphenylphosphonium manganese (II) bromide (C₃₈H₃₄P₂)MnBr₄ organogel scintillator that meets X‐ray imaging in complex scenarios. The robust organogel scintillator can be stretched with elongation up to 1300% while maintaining the scintillation properties. Activated by the dynamic hydrogen bonds and coordination bonds design, the organogel scintillator exhibits excellent self‐healing properties at room temperature to alleviate the vignetting problem of the rigid scintillator films, the X‐ray imaging resolution can reach 16.7 lp mm⁻¹. The organogel scintillator can also realize flexible and self‐healing X‐ray imaging in water, providing a design path for portable devices in harsh conditions.