A self-powered ultraviolet photodetector based on solution-processed p-NiO/n-ZnO nanorod array heterojunction
A self-powered ultraviolet photodetector based on solution-processed p-NiO/n-ZnO nanorod array heterojunction
复制标题
基于溶液处理p-NiO/n-ZnO纳米棒阵列异质结的自供电紫外光电探测器
DOI：
10.1039/c4ra12535e
复制
发表时间：
2015-01-01
期刊：
影响因子：
3.9
通讯作者：
Zhang, Yue
中科院分区：
文献类型：
--
作者：
Shen, Yanwei;Yan, Xiaoqin;Zhang, Yue
我们报道了用溶液处理的p-NiO/ zno纳米棒阵列异质结制造了一种全无机、自供电和快速响应的紫外（UV）光电探测器。该器件具有快速的二值响应，上升时间为0.23 s，衰减时间为0.21 s。在零偏置电压下，0.4 mW cm - 2紫外光照射，获得了0.44 mA W - 1的高响应度。这种自供电的性能可以归因于ZnO和NiO之间适当的内置电场，这是由器件的良好排列的能带结构产生的，从而产生了光伏效应。
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.