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A self-powered ultraviolet photodetector based on solution-processed p-NiO-ZnO nanorod array heterojunction

机译:基于固溶p-NiO / n-ZnO纳米棒阵列异质结的自供电紫外光电探测器

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摘要

We report fabrication of an all inorganic, self-powered and rapid-response ultraviolet (UV) photodetector using solution-processed p-NiO/ZnO-nanorod array heterojunction. The device exhibited a fast binary-response with a rise time of 0.23 s and decay time of 0.21 s. A large responsivity of 0.44 mA W-1 was achieved for a 0.4 mW cm(-2) UV light irradiation at a zero-bias voltage. The self-powered performance could be attributed to the proper built-in electric field between ZnO and NiO arising from the well-aligned energy-band structure of the device, which gives rise to a photovoltaic effect.
机译:我们报告使用溶液处理的p-NiO / ZnO-纳米线阵列异质结制造全无机,自供电和快速响应的紫外线(UV)光电探测器。该器件表现出快速的二进制响应,上升时间为0.23 s,衰减时间为0.21 s。在零偏置电压下,对于0.4 mW cm(-2)的紫外线照射,可实现0.44 mA W-1的大响应度。自供电性能可归因于设备的良好排列的能带结构引起的ZnO和NiO之间适当的内置电场,从而产生了光伏效应。

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