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ZnBeMgO thin films based UV Detectors by Spin Coating

机译：ZnBeMgO薄膜基紫外检测器的旋涂

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摘要

Be and Mg co-doped ZnO films Zn_(1-x-y)Be_xMg_yO (0 ≤ x ≤ 0.10, 0 ≤y ≤ 0.20) have been deposited for the first time by novel chemical deposition or spin coating method. From the x-ray diffraction patterns it is noticed that the pristine ZnO film exhibits wurtzite polycrystalline structure, however, co-doped films are (0002) preferentially oriented. The (0002) peak intensity also increases with the corresponding increase in dopants concentrations. The systematic decrease in the c-axis lattice parameter value in the co-doped films as compared to pure ZnO film suggests the incorporation of smaller ions Be~(+2)/Mg~(+2) at Zn~(+2) site. From the optical transmittance measurement it is noticed that all the films exhibited almost 80% transmittance in the visible region with sharp and single absorption edges in the UV region. The cut-off wavelength shifts from 375nm for the ZnO film to 330nm with 10 Be and 20% Mg co-doped film. The bandgap calculations revealed an increase in bandgap from 3.26eV (ZnO) to 3.60eV (Zn_(0.7)Be_(0.1)Mg_(0.2)O) film. Such an increase in the co-doped films fabricated by a much simpler and cheaper process is very useful in the realization of UV radiation detection without having little interference from the visible light.
机译：通过新颖的化学沉积或旋涂方法首次沉积了Be和Mg共掺杂的ZnO薄膜Zn_（1-x-y）Be_xMg_yO（0≤x≤0.10，0≤y≤0.20）。从x射线衍射图可以看出，原始的ZnO膜表现出纤锌矿多晶结构，然而，共掺杂​​的膜优先取向为（0002）。 （0002）峰强度也随着掺杂剂浓度的相应增加而增加。与纯ZnO薄膜相比，共掺杂薄膜中c轴晶格参数值的系统降低表明在Zn〜（+2）位置掺入了较小的离子Be〜（+2）/ Mg〜（+2） 。从光学透射率测量中注意到，所有膜在可见光区域中表现出几乎80％的透射率，而在UV区域中具有尖锐的吸收边缘和单个吸收边缘。截止波长从ZnO膜的375nm转变为10 Be和20％Mg共掺杂膜的330nm。带隙计算显示带隙从3.26eV（ZnO）增至3.60eV（Zn_（0.7）Be_（0.1）Mg_（0.2）O）薄膜。通过更简单和更便宜的方法制造的共掺杂膜的这种增加对于实现UV辐射检测而对可见光的干扰很小是非常有用的。

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  • 会议地点 Boston MA(US);Boston MA(US)
  • 作者

    Neeraj Panwar; J. Liriano; Ram S. Katiyar;

  • 作者单位

    Department of Physics, University of Puerto Rico, San Juan, Puerto Rico-00931, USA;

    Department of Physics, University of Puerto Rico, San Juan, Puerto Rico-00931, USA;

    Department of Physics, University of Puerto Rico, San Juan, Puerto Rico-00931, USA;

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  • 正文语种 eng
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