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

• # Fulltext

https://www.ias.ac.in/article/fulltext/boms/043/0216

• # Keywords

Chalcogenide glass; carbon nanotubes; electrolyte; non-Debye type.

• # Abstract

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.

• # Author Affiliations

1. Amorphous Semiconductor Research Lab, Department of Physics and Material Sciences, Madan Mohan Malaviya University of Technology, Gorakhpur 273010, India
2. Department of Electronics and Communication, Madan Mohan Malaviya University of Technology, Gorakhpur 273010, India

• # Bulletin of Materials Science

Volume 44, 2021
All articles
Continuous Article Publishing mode

• # Dr Shanti Swarup Bhatnagar for Science and Technology

Posted on October 12, 2020

Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020