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UV sensing properties of ZnO nanowiresanorods

机译：ZnO纳米线/纳米线的紫外传感特性

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摘要

This work presents a synthesis of vertically aligned and uniform ZnO nanowiresanorods (NWs/NRs) for the fabrication of ultraviolet (UV) photodetectors. ZnO was grown on Zn seed layer substrates by chemical vapor deposition (CVD) technique. The glass substrates were seeded with Zn at different deposition temperatures. The experimental results showed that surface morphology consists of mixed ZnO NWs/NRs shapes with preferential growth orientation on the c-axis. The increase of uniformity, diameter, and growth density was strongly dependent on the deposition temperatures of the Zn seed layer. The average diameter of mixed ZnO NWs/NRs increased from 50-350 nm with the increasing of the deposition temperature. The growth density is discussed in terms of the nuclei probability. Moreover, a novel blunt-pin on the top of ZnO NWs/NRs was observed under 450 degrees C condition due to change of growth rate on the crystal facet. The photoresponse of the UV sensor based on ZnO NWs/NRs was examined using UVA lamp (365 nm). The results showed that a high photo sensitivity with fast response and recovery times can be achieved upon the adsorbed electrons due to ultrahigh surface-to-volume ratio. (c) 2017 Elsevier B.V. All rights reserved.
机译：这项工作提出了垂直排列和均匀的ZnO纳米线/纳米线（NWs / NRs）的合成，用于制造紫外线（UV）光电探测器。通过化学气相沉积（CVD）技术在Zn种子层衬底上生长ZnO。在不同的沉积温度下，在玻璃基板上接种Zn。实验结果表明，表面形貌由混合的ZnO NWs / NRs形状组成，在c轴上具有优先的生长方向。均匀性，直径和生长密度的增加在很大程度上取决于Zn种子层的沉积温度。随着沉积温度的升高，混合ZnO NWs / NRs的平均直径从50-350 nm增加。根据原子核概率讨论了生长密度。此外，由于晶面上生长速率的变化，在450摄氏度的条件下观察到了ZnO NWs / NRs顶部的新型钝针。使用UVA灯（365 nm）检查了基于ZnO NWs / NRs的UV传感器的光响应。结果表明，由于超高的表面体积比，可以在吸附的电子上实现具有快速响应和恢复时间的高光敏性。 （c）2017 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2019年第31期|159-165|共7页
  • 作者

    Rodwihok Chatchai; Choopun Supab; Ruankham Pipat; Gardchareon Atcharawon; Phadungdhitidhada Surachet; Wongratanaphisan Duangmanee;

  • 作者单位

    Chiang Mai Univ, Fac Sci, Dept Phys & Mat Sci, Chiang Mai 50200, Thailand|CHE, Thailand Ctr Excellence Phys, Bangkok 10400, Thailand|Univ Ulsan, Sch Chem Engn, Daehak Ro 93, Ulsan 680749, South Korea;

    Chiang Mai Univ, Fac Sci, Dept Phys & Mat Sci, Chiang Mai 50200, Thailand|CHE, Thailand Ctr Excellence Phys, Bangkok 10400, Thailand;

    Chiang Mai Univ, Fac Sci, Dept Phys & Mat Sci, Chiang Mai 50200, Thailand|CHE, Thailand Ctr Excellence Phys, Bangkok 10400, Thailand;

    Chiang Mai Univ, Fac Sci, Dept Phys & Mat Sci, Chiang Mai 50200, Thailand|CHE, Thailand Ctr Excellence Phys, Bangkok 10400, Thailand;

    Chiang Mai Univ, Fac Sci, Dept Phys & Mat Sci, Chiang Mai 50200, Thailand|CHE, Thailand Ctr Excellence Phys, Bangkok 10400, Thailand;

    Chiang Mai Univ, Fac Sci, Dept Phys & Mat Sci, Chiang Mai 50200, Thailand|CHE, Thailand Ctr Excellence Phys, Bangkok 10400, Thailand;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Blunt pin ZnO nanowiresanorods; Chemical vapor deposition; Seed layer; UV Detector;

    机译：钝针状ZnO纳米线/纳米线;化学气相沉积;种子层;紫外检测器;

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