High-performance single crystal CH3NH3PbI3 perovskite x-ray detector

Organic-inorganic hybrid perovskites have exhibited unprecedented advantages for x-ray photon detection due to their exotic properties. Their high-crystalline quality has a great impact for high-detection sensitivity under a low electric field, especially related to the synthesis method. In this work, we analyze the capability of CH3NH3PbI3 (MAPbI(3)) perovskites as an x-ray detection material and propose to control the temperature gradient (TG) during the synthesis of MAPbI(3) single crystal perovskites for device fabrication. Our results show that the decreasing TG can effectively reduce the trap density and improve the crystal quality, which could lead to a boosted sensitivity of 1471.7 mu C/Gy(air)/cm(2) under a low electric field of 3.3V/mm. In addition, a higher detection sensitivity can be achieved by increasing the electric field. Our work presents a strategy to construct high-performance direct x-ray detectors.

Automated summary

Organic-inorganic hybrid perovskites show unprecedented advantages for x-ray photon detection. Controlling the temperature gradient during synthesis can effectively improve crystal quality and lead to higher detection sensitivity. This work presents a strategy to construct high-performance direct x-ray detectors.