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首页> 外文期刊>Nanotechnology >Unusual effects of nanowire-nanowire junctions on the persistent photoconductivity in SnO(2)nanowire network devices
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Unusual effects of nanowire-nanowire junctions on the persistent photoconductivity in SnO(2)nanowire network devices

机译：纳米线 - 纳米线连接对SnO（2）纳米线网络设备持续光电导性的异常影响

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摘要

The persistent photoconductivity (PPC) effect is a commonly observed behavior in SnO(2)nanostructures. Here we described and studied this effect through a comparative study, based on measurements of electronic transport using network as well as single devices built from SnO(2)nanowires under different experimental conditions. At room temperature, the PPC effect was observed to be more accentuated in single nanowire devices. It was found that nanowire-nanowire junctions play a fundamental role in the device behavior: the decay time of nanowire network (tau = 52 s) is about three orders of magnitude lower than those of single nanowire (tau = 4.57 x 10(4)s). Additionally, it was confirmed that the PPC effect was directly related to the amount of oxygen present in the environment and it is destroyed with increasing temperature. Furthermore, the PPC effect was interpreted based on the surface effect that depends on the capture/emission of electrons by the surface states.
机译：持续光电导（PPC）效应是SnO（2）纳米结构中常见的现象。在这里，我们通过一项比较研究来描述和研究这种效应，该研究基于在不同实验条件下使用网络和由SnO（2）纳米线构建的单个器件测量电子输运。在室温下，单纳米线器件的PPC效应更为明显。研究发现，纳米线结在器件行为中起着基础性作用：纳米线网络（tau=52 s）的衰减时间比单个纳米线（tau=4.57 x 10（4）s）的衰减时间低约三个数量级。此外，已经证实PPC效应与环境中存在的氧气量直接相关，并随着温度的升高而被破坏。此外，PPC效应是基于表面效应来解释的，表面效应取决于表面态对电子的捕获/发射。

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