• Dielectric relaxation and optical properties of 4-amino-3-mercapto-6-(2-(2-thienyl)vinyl)-1,2,4-triazin-5(4$H$)-one donor

• # Fulltext

https://www.ias.ac.in/article/fulltext/pram/088/01/0006

• # Keywords

Structural properties; AC conductivity; dielectric relaxation; triazine derivatives.

• # Abstract

Structural, optical, electrical conductivity and dielectric relaxation properties of bulk 4-amino-3-mercapto-6-(2-(2-thienyl)vinyl)-1,2,4-triazin-5(4H)-one donor (AMT) are studied. The structure of AMT in its powder form was analysed by X-ray diffraction (XRD), infrared spectroscopy (FT-IR) and atomic forcemicroscopy (AFM). AC measurements (impedance, capacitance and phase angle) are done over the temperature range 303–373 K and in the frequency range from 42 Hz to 5 MHz. Analytical approaches for the experimentalresults of the $\sigma_{AC}(\omega,T)$ and the temperature behaviour of the frequency exponent show that the correlated barrier hopping (CBH) model is a good model to explain the AC electrical conductivity of bulk AMT organic semiconductor material. Application of the dielectric modulus formulism gives a simple method for evaluating the activation energy of the dielectric relaxation. The activation energy from the DC conductivity and the relaxation time are quite similar suggesting a hopping mechanism for AMT. The optical band gap of AMT is investigated using spectrophotometric measurement of transmittance at normal incidence of light in the wavelength range 300–1100 nm.

• # Author Affiliations

1. Department of Physics, Faculty of Education, Ain Shams University, Roxy 11757, Cairo, Egypt
2. National Center for Radiation Research and Technology (NCRRT), Nasr City, Cairo, Egypt
3. Department of Physics, Faculty of Science, Taif University, Taif, 888, Saudi Arabia
4. Department of Chemistry, Faculty of Science, Taif University, Taif, 21974, Saudi Arabia
5. Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, 44511, Egypt
6. Department of Physics, Faculty of Science and Humanity Studies at Al-Quwayiyah, Shaqra University, Al-Quwayiyah 11971, Saudi Arabia

• # Pramana – Journal of Physics

Volume 96, 2022
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• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019

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