CsPbBr<sub>3</sub> Single Crystal X-ray Detector with Schottky Barrier for X-ray Imaging Application
Qiang Xu, Xiang Wang, Hang Zhang, Wenyi Shao, Jing Nie, Yong Guo, Juan Wang, Xiaoping Ouyang
Abstract
A high Z CsPbBr3 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 CsPbBr3 single crystals (SCs) were directly grown on ITO glass. We fabricated the Ag/CsPbBr3/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 CsPbBr3 SCs. The devices exhibit high performances with low dark current density (∼5–27 nA/cm2) 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 CsPbBr3 SC X-ray detector array, which makes it a promising application for pixel X-ray imaging techniques.