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首页> 外文期刊>Materials Science and Engineering >Interpretation of dc and ac conductivity of Ag_2O-SeO_2-MoO_3 glass-nanocomposite-semiconductor
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Interpretation of dc and ac conductivity of Ag_2O-SeO_2-MoO_3 glass-nanocomposite-semiconductor

机译：Ag_2O-SeO_2-MoO_3玻璃-纳米复合半导体的直流和交流电导率解释

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摘要

A new type of semiconducting glass-nanocomposites 0.3Ag_2O-0.7 (xMoO_3-(1-x) SeO_2) is prepared by melt-quenching route. The formation of Ag_2MoO_4, Ag_2Mo_2O_7 and Ag_6Mo_(10)O_(33) nanoparticles and SeO_3 and SeO_4 nanoclusters in glass-nanocomposites has been confirmed from X-ray diffraction (XRD) and field emission scanning electron microscopic (FESEM) studies. Fourier transform infrared (FTIR) spectroscopy is employed to find out Se-O stretching vibration as well as stretching vibrations of Mo_2O_7~(2-) ions. The dc conductivity of them is studied on the light of polaron hopping approach in a wide temperature range. At low temperatures, variable range hopping model (Mott's model) is employed to analyze the conductivity data. Greave's model is used to predict temperature dependent variable range hopping in the high temperature region. Frequency dependent ac conductivity is well explained on the basis of tunneling. Ⅰ-Ⅴ characteristics of the as-prepared samples have also been investigated.
机译：通过熔体淬火法制备了一种新型的半导电玻璃纳米复合材料0.3Ag_2O-0.7（xMoO_3-（1-x）SeO_2）。通过X射线衍射（XRD）和场发射扫描电子显微镜（FESEM）研究已证实，玻璃纳米复合材料中形成了Ag_2MoO_4，Ag_2Mo_2O_7和Ag_6Mo_（10）O_（33）纳米粒子以及SeO_3和SeO_4纳米团簇。利用傅立叶变换红外光谱（FTIR）来确定Se-O的拉伸振动以及Mo_2O_7〜（2-）离子的拉伸振动。利用极化子跳跃方法在较宽的温度范围内研究了它们的直流电导率。在低温下，采用可变范围跳跃模型（莫特模型）来分析电导率数据。 Greave模型用于预测高温区域中与温度相关的可变范围跳变。频率相关的交流电导率在隧穿的基础上得到了很好的解释。还研究了所制备样品的Ⅰ-Ⅴ特性。

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  • 来源
    《Materials Science and Engineering》 |2015年第7期|51-57|共7页
  • 作者

    Sanjib Bhattacharya; Ranadip Kundu; Anindya Sundar Das; Debasish Roy;

  • 作者单位

    Department of Engineering Sciences and Humanities, Siliguri Institute of Technology, Darjeeeling 734009, West Bengal, India;

    Department of Engineering Sciences and Humanities, Siliguri Institute of Technology, Darjeeeling 734009, West Bengal, India,Department of Mechanical Engineering, Jadavpur University, Jadavpur, Kolkata 700032, India;

    Department of Mechanical Engineering, Jadavpur University, Jadavpur, Kolkata 700032, India,Department of Electronics and Communication Engineering, Regent Education and Research Foundation, Barrackpore, Kolkata 7000121, India;

    Department of Mechanical Engineering, Jadavpur University, Jadavpur, Kolkata 700032, India;

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

    Glass-nanocomposites; Polaron hopping; Mott's model; Greave's model; Electrical conductivity;

    机译：玻璃-纳米复合材料;极化子跳跃;莫特的模型;格雷夫模型电导率;

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