Progress on perovskite photodetectors for optical communications

Optical communication has emerged as a pivotal wireless technology for next-generation information transmission, with photodetectors serving as core components that determine the overall system performance. Perovskite photodetectors stand out as promising candidates, attributed to their exceptional optoelectronic properties and low-cost fabrication. In this review, we systematically summarize the key characteristics of perovskite materials and the essential performance metrics of photodetectors. It further elaborates on the latest advances in the design and fabrication of perovskite photodetectors, encompassing device engineering, dimensional control, and large-scale array integration. Furthermore, the cutting-edge applications of perovskite photodetectors in optical communication scenarios are comprehensively discussed, along with an in-depth analysis of their current challenges and potential development directions. This review aims to provide a comprehensive overview of the progress in perovskite photodetectors for optical communications and offer valuable insights for the rational design and future advancement of high-performance photodetector technologies.