Cascade perovskite single crystal for gamma-ray spectroscopy.

ABSTRACT: The halide lead perovskite single crystals (HLPSCs) have great potential in gamma-ray detection with high attenuation coefficient, strong defects tolerance, and large mobility-lifetime product. However, mobile halide ions would migrate under high external bias, which would both weaken the gamma-ray response and cause additional noise. Here, we report the gamma-ray PIN photodiodes made of cascade HLPSCs including both ion-formed and electron-hole-formed electrical junctions that could suppress the ions migration and improve the charges collection. Our photodiodes based on cascade HLPSCs (MAPbBr₃/MAPbBr_2.5Cl_0.5/MAPbCl₃) show a wide halide-ion-formed depletion layer of ∼52 μm. The built-in potential along the wide ionic-formed junction ensures a hig

SUBMITTER: Wang X 

PROVIDER: S-EPMC10570118 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature