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Temperature dependence of interface state density distribution determined from conductance–frequency measurements in Ni/n-GaP/Al diode

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Abstract

The conductance measurements of the non-annealed (D1) and 400 °C annealed (D2) Ni/n-GaP/Al diodes were made over a wide frequency range of (10 kHz to 5 MHz) and temperature of (100–320 K with steps of 20 K) with bias voltage as a parameter. The capacitance and conductance measurement method is one of the most popular non-destructive methods to obtain information about metal–semiconductor (MS) diode interfaces. The interface state density distribution curves were determined over the band-gap energy near the semiconductor energy midgap. The interface state density (Dit) has been seen to be of the order of ∼1012 eV−1 cm−2. The Dit∼T curves have been plotted for different values of bias voltage. The value of Dit increased with increasing measurement temperature, and with increasing voltage from negative bias to positive bias voltage for both diodes. It was seen that the Dit value for D2 diode was greater than that for the D1 diode at each measurement temperature and bias voltage. It was seen in the interface state energy distribution or density distribution curves that the value of Dit has increased from the valence band maximum (Ev) towards conduction band minimum (Ec) at each measurement temperature.

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Authors and Affiliations

  1. Department of Basic Sciences, Faculty of Science, Erzurum Technical University, 25050, Erzurum, Turkey

    S. Duman

  2. Department of Electricity and Energy, Vocational High School of Technical Sciences, Bingol University, 12000, Bingol, Turkey

    K. Ejderha

  3. Vocational School of Health Services, Bingöl University, 12000, Bingol, Turkey

    I. Orak

  4. Faculty of Sciences and Arts, Department of Physics, Bingöl University, 12000, Bingol, Turkey

    N. Yıldırım

  5. Engineering Physics Department, Faculty of Engineering and Natural Sciences, Istanbul Medeniyet University, 34700, Istanbul, Turkey

    A. Turut

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Duman, S., Ejderha, K., Orak, I. et al. Temperature dependence of interface state density distribution determined from conductance–frequency measurements in Ni/n-GaP/Al diode. J Mater Sci: Mater Electron 31, 21260–21271 (2020). https://doi.org/10.1007/s10854-020-04638-3

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