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Flexible and stable copper-based halide scintillator for high-performance X-ray imaging.

Rb2CuBr3 nanocrystals with a high photoluminescence quantum yield (PLQY) of 75% were synthesized and then further mixed with polymethyl methacrylate to form flexible scintillators. The scintillators maintain a high PLQY, even after bending for 2000 cycles and storing in air for 28 days. X-Ray imaging of targeted objects was demonstrated based on the flexible scintillators, which exhibits a detection limit of 63 nGyair s-1 and a spatial resolution of 27.9 lp mm-1.