“…However, most of the existing studies on perovskite films focused on the detection of X-rays with a photon energy of less than 70 keV, the application of which is limited to scientific research and medical diagnosis fields, such as X-ray diffraction (XRD), X-ray fluorescence, mammography, and chest radiography, owing to the limited penetration depth. Several researchers reported on hard X-ray detection with photon energies larger than 80 keV, which are suitable for computed tomography (CT) imaging and inspection systems necessitating strong penetration in the objects. , Notably, MAPbBr 3 (MAPB) SCs yielded a sensitivity of 3928.3 μC Gy air –1 cm –2 for 120 keV hard X-ray detection. , To efficiently stop hard X-ray photons, SCs with millimeter thickness are desired owing to their low trap density, free grain boundary, and high stability. , Moreover, a high electric field can facilitate the collection of photon-generated charges at the metal electrodes deposited on both sides of the crystal. However, a high bias can significantly increase the dark current noise and current drift caused by the relatively low resistivity and strong ionic migration in most three-dimensional (3D) perovskites, respectively, which can deteriorate the resolution and stability of the detector. , …”