Self‐Powered Perovskite Photovoltaic Photodetector Enabled Hyper‐Sensitive Reflectance Confocal Microscopy

Abstract This study introduces an advanced reflectance confocal microscopy (RCM) system that integrates a perovskite‐based photodetector to achieve substantial improvements in imaging performance. The photodetector exhibits an external quantum efficiency of 86.3% at 520 nm, a dynamic range of 132 dB, and operates self‐powered with a dark current of only 0.38 nA, ensuring low noise and high efficiency. The system delivers a resolution of 1.10 µm and supports 3D imaging at a frame rate of 4 fps, enabling precise and high‐speed imaging. Demonstrated applications include wafer topography, biological tissue imaging, and photovoltaic cell grid analysis, highlighting its versatility across diverse scientific and industrial fields. These results underscore the potential of perovskite‐based photodetectors to transform RCM technology by providing superior imaging quality, simplified system integration, and broader applicability, paving the way for advancements in biomedical research, materials science, and other high‐resolution imaging applications.