Frequency effect on electrical and dielectric characteristics of In/Cu2ZnSnTe4/Si/Ag diode structure

  • H. H. GulluEmail author
  • Ö. Bayraklı Sürücü
  • M. Terlemezoglu
  • D. E. Yildiz
  • M. Parlak


In/Cu2ZnSnTe4/Si/Ag diode structure was fabricated by sputtering Cu2ZnSnTe4 (CZTTe) thin film layer on the Si layer with In front contact. The frequency dependent room temperature capacitance and conductance measurements were carried out to obtain detailed information of its electrical characteristics. Admittance spectra of the diode exhibited strong frequency dependence and the obtained values showed decreasing behavior with the increase in the applied frequency. The effect of interfacial film layer with series resistance values and density of interface states were investigated by taking into consideration of non-ideal electrical characteristics of the diode. The distribution profile of the interface states was extracted by Hill-Coleman and high–low frequency capacitance methods. As a function of frequency, they were in proportionality with the inverse of applied frequency. Dielectric constant and dielectric loss parameters were calculated from the maximum value of the diode capacitance at the strong accumulation region. The loss tangent showed a characteristic peak behavior at each frequency. Based on the time-dependent response of the interfacial charges to the applied ac field, the values of ac electrical conductivity and complex electric modulus were calculated and discussed as a function of frequency and bias voltage.



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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • H. H. Gullu
    • 1
    Email author
  • Ö. Bayraklı Sürücü
    • 2
  • M. Terlemezoglu
    • 3
    • 4
    • 5
  • D. E. Yildiz
    • 6
  • M. Parlak
    • 3
    • 4
  1. 1.Department of Electrical and Electronics EngineeringAtilim UniversityAnkaraTurkey
  2. 2.Department of PhysicsKirsehir Ahi Evran UniversityKırsehirTurkey
  3. 3.Department of PhysicsMiddle East Technical UniversityAnkaraTurkey
  4. 4.Center for Solar Energy Research and Applications (GÜNAM)Middle East Technical UniversityAnkaraTurkey
  5. 5.Department of PhysicsTekirdag Namık Kemal UniversityTekirdagTurkey
  6. 6.Department of PhysicsHitit UniversityCorumTurkey

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