Recent Progress on Perovskite Photodetectors for Narrowband Detection

Narrowband detection is of urgent demand in many fields, such as machine vision, biofluorescence imaging, artificial intelligence, flame, or gas molecule monitoring. However, the restricted recognition area and complex integration hinder the development of narrowband photodetectors. Due to the excellent photoconversion efficiency, metal halide perovskites are emerging as a new star in the field of high‐performance photodetectors. In recent years, soaring attention has been focused on narrowband photodetectors using perovskites as absorbing layers, owing to the excellent narrowband detection performance and tunable narrowband absorption peaks covering a wide optical range. Herein, this review is focused on the latest research progress of perovskite narrowband photodetectors, emphasizing the strategy of using perovskites for narrowband photodetectors from novel functional integration to applications and existing problems. The study is looking forward to elucidating different internal mechanisms of narrowband detection, providing unique insights into the challenges in this research area, and giving rise to the prosperity of narrowband detection.