Radiation-Tolerant Proton Detector Based on the MAPbBr3 Single Crystal

Proton detection has attracted immense interest recently, owing to the increasing demands for applications in physics, medicine, and space. However, the proton detectors suffer from a general problem of performance degradation caused by the proton irradiation-induced defects over long-term operation. Herein, we report a proton detector based on the methylammonium lead tribromide (MAPbBr3) perovskite single crystal, which exhibits remarkable radiation tolerance. The detector can monitor the fluence rate and dose quantitatively up to a high dose of 45 kGy with a fairly low bias electric field (0.01 V μm–1). Further increasing the dose to 1 MGy (7.3 × 1013 p cm–2) results in the detector dark current degrading gradually, but the dark current can rapidly recover at room temperature in a few hours after irradiation, showing a desirable self-healing characteristic, which can further enhance the radiation tolerance of the detector. These results show that this perovskite-based proton detector is highly promising for future applications in proton therapy, proton radiography, and so forth.