光电探测器
钙钛矿(结构)
光电子学
材料科学
光电导性
量子隧道
光电效应
电子
量子效率
纺纱
化学
复合材料
物理
结晶学
量子力学
作者
Sizhe Tao,Dezhi Yang,Ge He,Dechao Guo,Lifan Yang,Jingbo Zheng,Ji Li,Jiangshan Chen,Dongge Ma
标识
DOI:10.1016/j.orgel.2023.106800
摘要
Perovskites have shown potential applications in low-cost and high-performance optoelectronic devices because of their solution processability and inherent outstanding optoelectronic properties. Among them, perovskite photodetectors have been the focus of scientific researches. Here, a photomultiplication-type perovskite photodetector is successfully fabricated with the high-quality perovskite films by spinning-bathing-spinning method in ambient air, which overcomes the stringent environmental requirement of the preparation of perovskite films. The photomultiplication photoconductive gain is realized by the traps-enhanced hole injection by capturing photogenerated electrons. The deep trap states provided by MoO3 capture the generated electrons in active layer, which causes the interfacial trap-assisted hole-tunneling injection, thus forming the gain. Consequently, the photomultiplication-type perovskite photodetector achieves a high external quantum efficiency over 52800% and exhibits a fast photoresponse time about 18.5 μs.
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