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

Pramana

A M HASSANIEN6¹  ATEYYAH M AL-BARADI⁵  A A ATTA1⁴  E F M EL-ZAIDIA⁴  M M EL-NAHASS⁴  AHMED ASHOUR²  HOSAM A SAAD4³ 

[1] Department of Physics, Faculty of Science and Humanity Studies at Al-Quwayiyah, Shaqra University, Al-Quwayiyah 11971, Saudi Arabia$$;National Center for Radiation Research and Technology (NCRRT), Nasr City, Cairo, Egypt$$;Department of Chemistry, Faculty of Science, Taif University, Taif, 21974, Saudi Arabia$$;Department of Physics, Faculty of Education, Ain Shams University, Roxy 11757, Cairo, Egypt$$;Department of Physics, Faculty of Science, Taif University, Taif, 888, Saudi Arabia$$

关键词: Structural properties;    AC conductivity;    dielectric relaxation;    triazine derivatives.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

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.

【 授权许可】

Unknown