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The investigation of effects of (Fe2O4-PVP) organic-layer, surface states, and series resistance on the electrical characteristics and the sources of them

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Abstract

In this work, Au/n-Si (MS) structures with and without (Fe2O4-doped PVP) interlayer were prepared with the same conditions to see effects of organic layer on the electrical characteristics and conduction mechanisms. For this aim, I–V and Z–V measurements of them were carried out at room temperature. The saturation current (Is), ideality factor (n), barrier height (ΦB(I–V)), series (Rs) and shunt (Rsh) resistances, and rectifying rate (RR = IF/IR) of them were extracted from the I–V data as 2.90 × 10−8 A, 1.699, 0.741 eV, 1.58 kΩ, 25.7 MΩ, 1.45 × 104 for MS and 2.30 × 10−9 A, 1.634, 0.806 eV, 1.17 kΩ, 103 MΩ, 9.01 × 104 for MPS, respectively. The values of interface states (Nss) were also extracted from the I–V data at forward bias by considering voltage dependent BH and n, and it is found that they increase from the mid-gap of semiconductor towards the conductance band. The values of doping atoms (ND), Fermi-energy (EF), and (ΦB(C–V)) were also acquired from the C−2–V plots at reverse bias as 9.08 × 1014 cm−3, 0.258 eV, 0.914 eV for MS and 7.650 × 1014 cm−3, 0.263 eV, 0.981 eV, for MPS structure, respectively. It is clear that the (Fe2O4-PVP) interlayer leads to decreases in Rs, Nss, leakage current and increase in rectifying rate (RR), Rsh and BH, so that it can used in place of the conventional oxide or insulator layer.

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  1. Department of Chemical Engineering, Faculty of Engineering, Gazi University, Ankara, Turkey

    Seçkin Altındal Yerişkin

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Altındal Yerişkin, S. The investigation of effects of (Fe2O4-PVP) organic-layer, surface states, and series resistance on the electrical characteristics and the sources of them. J Mater Sci: Mater Electron 30, 17032–17039 (2019). https://doi.org/10.1007/s10854-019-02045-x

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