• • Achieved MAPbBr3 single crystals with lateral dimensions up to 2 inches, a size previously unattainable without significant quality loss, enabling larger-area detectors for practical radiation imaging.
• • Record-low X-ray diffraction rocking curve FWHM of 0.0093° at the (002) face, indicating exceptional crystalline perfection, which is critical for minimizing charge-carrier trapping and achieving high energy resolution.
• • Spectroscopic-grade gamma-ray detection with energy resolutions of 8.4% for 57Co (122 keV) and 11.1% for 137Cs (662 keV), demonstrating performance comparable to commercial detectors and suitable for isotope identification.
• • High X-ray sensitivity of 1.65 × 10^4 μC Gy−1 cm−2, which is among the highest reported for perovskite SCs, enabling low-dose imaging and reducing radiation exposure in medical and security applications.