CsPbBr 3 Single Crystal X-ray Detector with Schottky Barrier for X-ray Imaging Application

A high Z CsPbBr 3 halide perovskite with large charge carrier diffusion length was used for radiation detection applications. The high sensitivity X-ray detector is expected to be used for imaging applications. The free-seeding CsPbBr 3 single crystals (SCs) were directly grown on ITO glass. We fabricated the Ag/CsPbBr 3 /ITO sandwich structural X-ray detector with Schottky contact at room temperature. We investigated the X-ray detection and phase-contrast X-ray imaging of the all-inorganic halide perovskite CsPbBr 3 SCs. The devices exhibit high performances with low dark current density (∼5–27 nA/cm 2 ) and high sensitivity (770 μC·Gy –1 ·cm –2 ) with an applied voltage of 8 V. An “L”-shape imaging was obtained based on the CsPbBr 3 SC X-ray detector array, which makes it a promising application for pixel X-ray imaging techniques.