钙钛矿材料因其可调带隙工程、高吸收系数、长程平衡载流子传输距离等光学、电学特性而在光电探测领域表现出光明的应用前景。钙钛矿晶体包含了微晶/多晶薄膜、块体单晶和低维纳米单晶等不同形貌。依次介绍了基于不同形貌钙钛矿晶体制成的光电导型、光伏型、晶体管型与光电倍增型光电探测器的发展历史及研究现状,展示了不同类型器件在光谱响应率、探测率及响应速度等性能参数方面所表现出的不同特征。总结了钙钛矿光电探测器在柔性、窄带探测、自驱动及阵列化等特殊性能方面所取得的研究进展,并对钙钛矿光电探测器的发展前景进行了展望。

Perovskite is a promising candidate for photodetector applications owing to its outstanding optical and electrical characteristics, such as a tunable bandgap, a high absorption co-efficiency, and a long and balanced carrier diffusion length. Perovskite crystals are diverse in their morphologies, which include micro and nano crystalline films, single crystalline bulks, and single crystalline nanocrystals. In this study, the photodetectors composed of perovskite crystals with different morphologies based on the principles of photoconductive, photovoltaic, field effect transistor, and photomultiplication are reviewed, which reveal different characteristics in terms of responsivity, detectivity, and response speed. The research progress of perovskite photodetectors is summarized in each of the aspects of flexibility, narrow band response, self-powered photodetection, and patterned array. A future prospect of perovskite photodetectors is also discussed.