【摘 要】
：
A two-dimensional (2D) organic-inorganic hybrid perovskite (OIHP) material is considered as a promising candidate for a long-term stable photodetector owing to its outstanding phase and environmental stability.Herein,we demonstrate a perovskite photodiode
【机 构】
：
College of Chemistry,Fuzhou University,Fuzhou 350000,China;State Key Laboratory of Structural Chemis
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A two-dimensional (2D) organic-inorganic hybrid perovskite (OIHP) material is considered as a promising candidate for a long-term stable photodetector owing to its outstanding phase and environmental stability.Herein,we demonstrate a perovskite photodiode based on the DJ phase 2D perovskite(PDA)(MA)n-1PbnI3n+1 (where PDA is 1,3-propylenediamine,MA is methylamine,nominal n =4).The best-performance device exhibits a high detectivity of 4.57 × 1011 Jones,a responsivity of 0.25 A·W-1 at 480 nm,a low dark current density of 9.60 × 10-4 mA.cm-2,and a remarkable on/off ratio of 3.10 × 105.The unencapsulated device can maintain 95％ of the initial photocurrent density after 90 days under an ambient atmosphere with relative humidity (RH) of 65％,demonstrating its improved stability than the 3D counterpart.The excellent stability of the photodiode based on 2D perovskite promises its bright commercial application future.
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