Pramana

, 88:6 | Cite as

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

  • M M EL-NAHASS
  • AHMED ASHOUR
  • A A ATTA
  • HOSAM A SAAD
  • A M HASSANIEN
  • ATEYYAH M AL-BARADI
  • E F M EL-ZAIDIA
Article
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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 σ AC(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.

Keywords

Structural properties AC conductivity dielectric relaxation triazine derivatives. 

PACS Nos

77.22.Gm 78.20.−e 
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Copyright information

© Indian Academy of Sciences 2016

Authors and Affiliations

  • M M EL-NAHASS
    • 1
  • AHMED ASHOUR
    • 2
  • A A ATTA
    • 1
    • 3
  • HOSAM A SAAD
    • 4
    • 5
  • A M HASSANIEN
    • 6
  • ATEYYAH M AL-BARADI
    • 3
  • E F M EL-ZAIDIA
    • 1
  1. 1.Department of Physics, Faculty of EducationAin Shams UniversityRoxyEgypt
  2. 2.National Center for Radiation Research and Technology (NCRRT)Nasr CityEgypt
  3. 3.Department of Physics, Faculty of ScienceTaif UniversityTaifSaudi Arabia
  4. 4.Department of Chemistry, Faculty of ScienceTaif UniversityTaifSaudi Arabia
  5. 5.Department of Chemistry, Faculty of ScienceZagazig UniversityZagazigEgypt
  6. 6.Department of Physics, Faculty of Science and Humanity Studies at Al-QuwayiyahShaqra UniversityAl-QuwayiyahSaudi Arabia

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