Narrow-bandgap Sn–Pb mixed perovskite single crystals for high-performance near-infrared photodetectors

, and a fast response speed of 22.78 μs in the NIR spectral region (750-860 nm). Furthermore, high-quality NIR imaging and wearable health monitoring are achieved by employing high-performance and self-driven NIR photodetectors. This work contributes to developing Sn-Pb mixed perovskite single crystals and provides a promising candidate for efficient and low-cost NIR photodetection.