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首页> 美国卫生研究院文献>Nanoscale Research Letters >High-Performance Self-Powered UV Detector Based on SnO2-TiO2 Nanomace Arrays
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High-Performance Self-Powered UV Detector Based on SnO2-TiO2 Nanomace Arrays

机译：基于SnO2-TiO2纳米面阵列的高性能自供电紫外检测器

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Photoelectrochemical cell-typed self-powered UV detectors have attracted intensive research interest due to their low cost, simple fabrication process, and fast response. In this paper, SnO2-TiO2 nanomace arrays composed of SnO2 nanotube trunk and TiO2 nanobranches were prepared using soft chemical methods, and an environment-friendly self-powered UV photodetector using this nanostructure as the photoanode was assembled. Due to the synergistic effect of greatly accelerated electron-hole separation, enhanced surface area, and reduced charge recombination provided by SnO2-TiO2 nanomace array, the nanostructured detector displays an excellent performance over that based on bare SnO2 arrays. The impact of the growing time of TiO2 branches on the performance of UV photodetector was systematically studied. The device based on optimized SnO2-TiO2 nanomace arrays exhibits a high responsivity of 0.145 A/W at 365 nm, a fast rising time of 0.037 s, and a decay time of 0.015 s, as well as excellent spectral selectivity. This self-powered photodetector is a promising candidate for high-sensitivity, high-speed UV-detecting application.
机译：光电化学电池型自供电紫外线检测器因其低成本，简单的制造工艺和快速的响应而引起了广泛的研究兴趣。本文采用软化学方法制备了由SnO2纳米管主干和TiO2纳米支组成的SnO2-TiO2纳米阵列，并组装了以该纳米结构为光阳极的环保型自供电紫外光电探测器。由于SnO2-TiO2纳米面阵列提供了大大加快的电子-空穴分离，增加的表面积和减少的电荷复合的协同效应，因此与基于裸露的SnO2阵列的纳米结构探测器相比，纳米结构的探测器表现出出色的性能。系统研究了TiO2分支生长时间对紫外光电探测器性能的影响。基于优化的SnO2-TiO2纳米面阵列的器件在365 nm处显示出0.145 A / W的高响应度，0.037 s的快速上升时间，0.015 s的衰减时间以及出色的光谱选择性。这种自供电的光电探测器是高灵敏度，高速紫外线探测应用的有希望的候选者。

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