Preparation of high-quality CH ₃ NH ₃ PbBr ₃ single crystals using a steady-state solution microreaction approach: achieve high performance and fast response of photodetectors

Perovskite single crystals have emerged as prominent candidates for high-performance photodetectors owing to their high carrier mobility and superior absorption coefficient. In this study, high-quality CH 3 NH 3 PbBr 3 single crystal materials were successfully synthesized employing a steady-state solution microreaction method with the flow rate precisely controlled via a small orifice. A CH 3 NH 3 PbBr 3 single crystal photodetector based on an MSM (metal-semiconductor-metal) structure was constructed, demonstrating a response time of 4.8/3.1 μs and a responsivity of 100 mA/W. Our research offers novel strategies for the exploration of perovskite single crystal synthesis and the development of high-performance perovskite-based photodetectors.