Dielectric relaxation and optical properties of 4-amino-3-mercapto-6-(2-(2-thienyl)vinyl)-1,2,4-triazin-5(4H)-one donor
El-Nahass, M. M.; Ashour, Ahmed Maamoun; Atta, A. A.; Saad, Hosam A.; Hassanien, A. M.; Al-Baradi, Ateyyah M.; E.F.M.El-Zaidia;
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 force microscopy (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 experimental results of the σAC(ω,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.
Other data
Title | Dielectric relaxation and optical properties of 4-amino-3-mercapto-6-(2-(2-thienyl)vinyl)-1,2,4-triazin-5(4H)-one donor | Authors | El-Nahass, M. M.; Ashour, Ahmed Maamoun; Atta, A. A.; Saad, Hosam A.; Hassanien, A. M.; Al-Baradi, Ateyyah M.; E.F.M.El-Zaidia | Keywords | AC conductivity;Dielectric relaxation;Structural properties;Triazine derivatives | Issue Date | 1-Jan-2017 | Publisher | INDIAN ACAD SCIENCES | Journal | Pramana - Journal of Physics | ISSN | 03044289 | DOI | 10.1007/s12043-016-1318-3 | Scopus ID | 2-s2.0-85009211857 | Web of science ID | WOS:000392148600006 |
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