• PRIYANKA JAISWAL

      Articles written in Bulletin of Materials Science

    • Study of ac conductivity mechanism and impedance spectroscopy in CNT-added Cu$_5$Se$_{75}$Te$_{10}$In$_{10}$ chalcogenide system

      PRIYANKA JAISWAL PRAVIN KUMAR SINGH POOJA LOHIA D K DWIVEDI

      More Details Abstract Fulltext PDF

      This study is devoted to the investigation of electrical properties of multi-walled carbon nanotube (MWCNT)-contaminated Cu-Se-Te-In chalcogenide glassy composite in the temperature range 303–373 K and frequencyinterval from 1 Hz to 1 MHz. The MWCNT/chalcogenide glass was characterized by means of X-ray diffractometer, field emission scanning electron microscope, impedance spectroscopy and electrical measurements. Electrical conductivity was increased by 10–100 times of magnitude by adding 1 and 2 wt% of MWCNT to it, changing the behaviour from insulator to the semiconductor. This rapid change in the electrical conductivity for carbon nanotube-added glasses is due to the highly conducting behaviour of carbon nanotubes. The data observed from dc conductivity measurement in the temperature range 303–373 K suggest that thermally activated hopping is the dominant conduction mechanism betweenlocalized states in band tails, which is explained by Mott’s model. The temperature-dependent relaxation phenomenon has also been examined by a detailed analysis of impedance spectra.

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      Posted on July 25, 2019

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