材料科学
钙钛矿(结构)
异质结
光电探测器
响应度
纳米线
光电子学
纳米线电池
电极
光探测
制作
聚萘二甲酸乙二醇酯
纳米技术
图层(电子)
化学工程
物理化学
病理
工程类
磷酸钒锂电池
化学
阳极
替代医学
医学
作者
Meng Wang,Wei Tian,Fengren Cao,Min Wang,Liang Li
标识
DOI:10.1002/adfm.201909771
摘要
Abstract Self‐powered perovskite photodetectors mainly adopt the vertical heterojunction structure composed of active layer, electron–hole transfer layers, and electrodes, which results in the loss of incident light and interfacial accumulation of defects. To address these issues, a self‐powered lateral photodetector based on CsPbI 3 –CsPbBr 3 heterojunction nanowire arrays is designed on both a rigid glass and a flexible polyethylene naphthalate substrate using an in situ conversion and mask‐assisted electrode fabrication method. Through adding the polyvinyl pyrrolidone and optimizing the concentration of precursors under the pressure‐assisted moulding process, both the crystallinity and stability of perovskite nanowire array are improved. The nanowire array–based lateral device shows a high responsivity of 125 mA W −1 and a fast rise and decay time of 0.7 and 0.8 ms under a self‐powered operation condition. This work provides a new strategy to fabricate perovskite heterojunction nanoarrays towards self‐powered photodetection.
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