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首页> 外文期刊>Journal of nano research >Sol-Gel Preparation, Deposition and Characterization of Nanostructured Aluminium Doped Zinc Oxide
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Sol-Gel Preparation, Deposition and Characterization of Nanostructured Aluminium Doped Zinc Oxide

机译：纳米铝掺杂氧化锌的溶胶凝胶制备，沉积及表征

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摘要

Pure and Aluminium-doped ZnO (Zn_(1-x)Al_xO)_ x = 0 to 5 wt% thin films were deposited onto glass substrate by sol-gel spin coating method. The influence of various aluminium concentration in ZnO thin films on the structural, surface, optical and photoconducting properties were investigated. The GEXRD studies confirmed the polycrystalline nature with wurtzite structure of pure and Al doped ZnO films. Films with 1.5 % concentration of aluminium showed maximum absorption and transmission in the UV and visible regions respectively. The FESEM images showed crack free films with increasing grain boundaries upon doping. The average grain size is found to decrease due to aluminium doping. AFM images showed doped films with 1.5 % have better smoothness than other films. The photoconductivity measurements reveal that there is increase in the photocurrent compared to dark current for the Al doped ZnO. The photocurrent reaches its maximum value for ZnO: Al-1.5 % and then decreases upon increase in Al concentration. The photoresponse has slightly degraded upon aluminium doping onto ZnO. Temperature dependent conductivity shows that the thermal activation energy for the film decreases up to 1.5 % aluminium concentration and then increases for other concentrations in the temperature range 308 to 375K.
机译：通过溶胶-凝胶旋涂法将纯的和掺杂铝的ZnO（Zn_（1-x）Al_xO）_ x = 0至5 wt％的薄膜沉积到玻璃基板上。研究了ZnO薄膜中各种铝浓度对结构，表面，光学和光电导性能的影响。 GEXRD研究证实了纯铝掺杂ZnO薄膜具有纤锌矿结构的多晶性质。铝含量为1.5％的薄膜分别在紫外线和可见光区域显示出最大的吸收和透射率。 FESEM图像显示在掺杂时具有增加的晶界的无裂纹膜。发现平均晶粒尺寸由于铝掺杂而减小。原子力显微镜图像显示，掺杂薄膜的1.5％比其他薄膜具有更好的平滑度。光电导率测量表明，与铝掺杂的ZnO的暗电流相比，光电流有所增加。 ZnO的光电流达到最大值：Al-1.5％，然后随着Al浓度的增加而降低。铝掺杂到ZnO上后，光响应略有下降。随温度变化的电导率表明，薄膜的热活化能降低至铝浓度的1.5％，然后在308至375K的温度范围内增加。

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  • 来源
    《Journal of nano research》 |2013年第2013期|96-106|共11页
  • 作者

    T. Ganesh; S. Rajesh; Francis P. Xavier;

  • 作者单位

    Loyola Institute of Frontier Energy (LIFE), Loyola College, Chennai - 600034, India PG & Research Department of Physics, Presidency College, Chennai - 600005, India;

    Loyola Institute of Frontier Energy (LIFE), Loyola College, Chennai - 600034, India PG & Research Department of Physics, A.M Jain College, Chennai - 600114, India;

    Loyola Institute of Frontier Energy (LIFE), Loyola College, Chennai - 600034, India LICET, Loyola College, Chennai - 600034, India;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    sol-gel; photoconductivity; photoresponse; activation energy;

    机译：溶胶凝胶光电导性光响应活化能;

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