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Growth and optical and field emission properties of flower-like ZnO nanostructures with hexagonal crown

机译：具有六角冠的花状ZnO纳米结构的生长以及光和场发射特性

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摘要

Flower-like zinc oxide (ZnO) nanostructures with hexagonal crown were synthesized on a Si substrate by direct thermal evaporation of zinc power at a low temperature of 600 ℃ and atmospheric pressure. Field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Raman spectroscopy and photoluminescence were applied to study the structural characteristics and optical properties of the product. The result indicated that the flower-like product with many slender branches and hexagonal crowns at the ends were single-crystalline wurtzite structures and were preferentially oriented in the <001> direction. The photoluminescence spectrum demonstrated a strong UV emission band at about 386 nm and a green emission band at 516 nm. The field emission of the product showed a turn-on field of 3.0 V/μm at a current density of 0.1 μA/cm~2, while the emission current density reached about 1 mA/cm~2 at an applied field of 5.9 V/μm.
机译：通过在600℃的低温和大气压下直接热蒸发锌粉，在Si衬底上合成了具有六角冠的花状氧化锌（ZnO）纳米结构。应用场发射扫描电子显微镜，透射电子显微镜，X射线衍射，拉曼光谱和光致发光来研究该产品的结构特征和光学性质。结果表明，在末端具有许多细长分支和六边形冠的花状产物是单晶纤锌矿结构，并且优选沿<001>方向取向。光致发光光谱显示出在约386nm处的强UV发射带和在516nm处的绿色发射带。产物的场发射在0.1μA/ cm〜2的电流密度下显示3.0 V /μm的导通场，而在5.9 V / cm的施加场下发射电流密度达到约1 mA / cm〜2。微米

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  • 来源
    《Thin Solid Films》 |2009年第15期|4385-4389|共5页
  • 作者

    X.X. Yang; W. Lei; X.B. Zhang; B.P. Wang; C. Li; K. Hou; Y.K. Cui; Y.S. Di;

  • 作者单位

    Jiangsu Information Display Engineering Research Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, PR China;

    Jiangsu Information Display Engineering Research Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, PR China;

    Jiangsu Information Display Engineering Research Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, PR China;

    Jiangsu Information Display Engineering Research Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, PR China;

    Jiangsu Information Display Engineering Research Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, PR China;

    Jiangsu Information Display Engineering Research Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, PR China;

    Jiangsu Information Display Engineering Research Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, PR China;

    Jiangsu Information Display Engineering Research Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, PR China;

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  • 正文语种 eng
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  • 关键词

    zinc oxide; thermal evaporation; flower-like structure; hexagonal crown; optical properties; field emission; scanning electron microscopy; X-ray diffraction;

    机译：氧化锌热蒸发花状结构;六角冠光学性质场发射;扫描电子显微镜;X射线衍射;

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