High-Stable X-ray Imaging from All-Inorganic Perovskite Nanocrystals under a High Dose Radiation

All-inorganic perovskites of CsPbBr 3 nanocrystals (NCs) exhibit strong X-ray absorption and have been demonstrated to be highly efficient scintillators for X-ray detection and imaging. However, the long-term stability of the perovskite remains a major hurdle in practical applications, especially under a commercial dose of X-ray irradiation (0.5–5.5 mGy·s –1 ). Herein, with a solution-protected annealing approach reconstructing the CsPbBr 3 NCs free from undesired defects, the perovskite scintillators provide a long-term (∼3600 s) stable visualization tool for X-ray radiography (1.44 × 10 6 captured images for the exposure time of 2.5 ms per image) under the irradiation dose of 1 mGy·s –1 . This work opens a window for the stability of perovskite scintillators and demonstrates their robust and long-term efficient radioluminescence (RL) for low-cost radiography and X-ray imaging application.