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The evaluation of the current–voltage and capacitance–voltage-frequency measurements of Yb/p-Si Schottky diodes with a high zero-bias barrier height

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Abstract

The rare-earth metal Yb (Ytterbium) which has a very low work function of 2.60 eV has been shown to high quality Schottky contacts to p-Si. Two distinct linear regions in the semi-logarithmic current density–voltage plot are observed for Yb/p-Si Schottky diodes. From the linear regions, the very high zero-bias barrier height values are determined as 0.83 and 0.88 eV. The value of rectification ratio is in order of ~ 106 which is close to the commercial Schottky diodes. From Cheung functions, the value of series resistance is found to be 12.60 Ω. Furthermore, the important contact parameters of the diodes are calculated by using modified Norde method. The contact parameters obtained from reverse bias capacitance–voltage-frequency measurements do not show an important dependence on frequency. The calculated values of acceptor concentration are in close agreement with the value of doping concentration of the p-Si wafer used in this study.

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Authors and Affiliations

  1. Department of Energy Systems Engineering, Isparta University of Applied Sciences, 32260, Isparta, Turkey

    Havva Elif Lapa

  2. Department of Physics, Suleyman Demirel University, 32260, Isparta, Turkey

    Çiğdem Şükriye Güçlü, Durmuş Ali Aldemir & Ahmet Faruk Özdemir

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  1. Havva Elif Lapa
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Lapa, H.E., Güçlü, Ç.Ş., Aldemir, D.A. et al. The evaluation of the current–voltage and capacitance–voltage-frequency measurements of Yb/p-Si Schottky diodes with a high zero-bias barrier height. Appl. Phys. A 126, 473 (2020). https://doi.org/10.1007/s00339-020-03662-8

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