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Frequency Response of C–V and G/ω-V Characteristics of Au/(Nanographite-doped PVP)/n-Si Structures

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Abstract

This paper reports that frequency response on profile of C–V–ƒ and G/ω–V–ƒ characteristics of spin-coated nanographite (NG)-doped polyvinylpyrrolidone (PVP)/n-Si structures in a wide frequency (1 kHz–5 MHz) and voltage (± 3 V) ranges at room temperature. Hereby, the basic parameters of the structure such as diffusion potential (VD), doping donor density (ND), Fermi energy level (EF), maximum electric field (Em), depletion layer thickness (Wd), and barrier height (ΦB) are derived by using the intercept and slope of C−2–V–ƒ plot for each frequency. Additionally, the energy density distribution of surface states (Nss) and their relaxation time values (τ) are also attained from the conduction method and their values are found as 4.999 × 1012 eV−1 cm−2 and 2.92 µs at 0.452 eV, and 3.857 × 1012 eV−1 cm−2 and 164 µs at 0.625 eV, respectively. The lower Nss values are the consequence of passivation effect of the used nanographite (NG)-PVP polymer interlayer. As a result, the polymer interlayer based nanographite (NG)-PVP is candidate instead of the widely used oxide/insulator layer for the purpose of decreasing the surface states or dislocations.

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Acknowledgements

This study was supported by Gazi University Scientific Research Project. (Project Number: GU-BAP.05/2019-26)

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Authors and Affiliations

  1. Department of Advanced Technologies, Institute of Science and Technology, Gazi University, Ankara, Turkey

    Ahmet Muhammed Akbaş

  2. Faculty of Engineering and Architecture Department of Electrical-Electronic Engineering, Kastamonu University, Kastamonu, Turkey

    Osman Çiçek

  3. Faculty of Sciences, Depratment of Physics, Gazi University, Ankara, Turkey

    Şemsettin Altındal

  4. Department of Physics, University of Mohaghegh Ardabili, Ardabil, Iran

    Y. Azizian-Kalandaragh

  5. Deprtment of Engineering Sciences, Sabalan University of Advanced Technologies (SUAT), Namin, Iran

    Y. Azizian-Kalandaragh

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  1. Ahmet Muhammed Akbaş
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Akbaş, A.M., Çiçek, O., Altındal, Ş. et al. Frequency Response of C–V and G/ω-V Characteristics of Au/(Nanographite-doped PVP)/n-Si Structures. J Mater Sci: Mater Electron 32, 993–1006 (2021). https://doi.org/10.1007/s10854-020-04875-6

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