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首页> 外文期刊>Journal of materials science >Correlation between the microstructure and electrical properties of Bi-As_2S_3 quasibinar chalcogenides by using AC impedance spectroscopy
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Correlation between the microstructure and electrical properties of Bi-As_2S_3 quasibinar chalcogenides by using AC impedance spectroscopy

机译：交流阻抗谱法研究Bi-As_2S_3准硫属元素硫属元素的微观结构与电性能的相关性

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摘要

The objective of this paper was to study the AC impedance of Bi_5(As_2S_3)_(95) and Bi_7(As_2S_3)_(93) chalcogenides in a frequency range of 100 Hz to 1 MHz at different temperatures. A preliminary structural analysis of the compounds by X-ray diffraction technique and scanning electron microscope confirmed the amorphous character for the sample with x = 5 at.% Bi and the existence of two phases (amorphous + crystalline) for the sample with x = 7 at.%. Therefore, the AC impedance analysis by means of an equivalent circuit model was used to establish correlation between the distinct microstructures and electrical properties of these compounds. The presence of the glassy matrix and matrix-crystal interface effects was observed in the sample Bi_7(As_2S_3)_(93). Moreover, the analysis of impedance data indicated the decrease of resistance with temperature for both samples usually shown by semiconductors i.e. negative temperature coefficient of resistance. The present Bi-As_2S_3 quasibinar chalcogenides also exhibit the temperature dependent relaxation phenomena. According to estimated values of activation energy of relaxation processes, it was concluded that the mechanisms of conductivity and relaxation are the same in both samples.
机译：本文的目的是研究Bi_5（As_2S_3）_（95）和Bi_7（As_2S_3）_（93）硫族化物在不同温度下在100 Hz至1 MHz频率范围内的交流阻抗。通过X射线衍射技术和扫描电子显微镜对化合物进行初步结构分析，证实了x = 5 at。％Bi的样品具有非晶态特征，并且x = 7的样品存在两相（非晶+结晶）。在。％。因此，通过等效电路模型进行的交流阻抗分析被用于建立这些化合物的不同微结构与电性能之间的相关性。在样品Bi_7（As_2S_3）_（93）中观察到玻璃态基质和基质-晶体界面效应的存在。此外，对阻抗数据的分析表明，对于两个通常由半导体显示的样品，电阻随温度的降低即电阻的负温度系数。目前的Bi-As_2S_3准双硫族化物也表现出温度依赖性的弛豫现象。根据弛豫过程的活化能估计值，可以得出结论，两个样品的电导率和弛豫机理相同。

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  • 来源
    《Journal of materials science》 |2016年第2期|1655-1661|共7页
  • 作者

    M. V. Siljegovic; D. L. Sekulic; S. R. Lukic Petrovic; D. M. Petrovic;

  • 作者单位

    Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovica 4, 21000 Novi Sad, Serbia;

    Faculty of Technical Sciences, University of Novi Sad, Trg Dositeja Obradovica 6, 21000 Novi Sad, Serbia;

    Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovica 4, 21000 Novi Sad, Serbia;

    Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovica 4, 21000 Novi Sad, Serbia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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