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Article

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Title

The Barrier’s Heights and Its Inhomogeneities on Diamond Silicon Interfaces

Authors

[ 1 ] Instytut Badań Materiałowych i Inżynierii Kwantowej, Wydział Inżynierii Materiałowej i Fizyki Technicznej, Politechnika Poznańska | [ P ] employee

Scientific discipline (Law 2.0)

[2.8] Materials engineering

Year of publication

2022

Published in

Materials

Journal year: 2022 | Journal volume: vol. 15 | Journal number: iss. 17

Article type

scientific article

Publication language

english

Keywords
EN
  • Raman spectroscopy
  • XRD
  • polycrystalline diamond film
  • p-PCD/n-Si heterojunction
  • I-V characteristics
  • energy barrier height
  • ideality factor
Abstract

EN In this work, the electrical parameters of the polycrystalline diamonds' p-PCD/n-Si heterojunction were investigated using temperature-dependent current-voltage (I-V) characteristics. In the temperature range of 80-280 K, the ideality factor (n) and energy barrier height (φb) were found to be strongly temperature dependent. The φb increases with temperature rise, while the n value decreases. The observed dependencies are due to imperfections at the interface region of a heterojunction and the non-homogeneous distribution of the potential barrier heights. Values of the φb were calculated from I-V characteristics using the thermionic emission theory (TE). The plot of φb versus 1/2 kT revealed two distinct linear regions with different slopes in temperature regions of 80-170 K and 170-280 K. This indicates the existence of a double Gaussian distribution (DGD) in heterojunctions. Parameters such as mean barrier heights φ¯b and standard deviations σ were obtained from the plots linearization and read out from intercepts and slopes. They take values φ¯b = 1.06 eV, σ = 0.43 eV, respectively. The modified Richardson plot is drawn to show the linear behavior in these two temperature ranges, disclosing different values of the effective Richardson constants (A*).

Date of online publication

26.08.2022

Pages (from - to)

5895 - 1 - 5895 - 10

DOI

10.3390/ma15175895

URL

https://pubmed.ncbi.nlm.nih.gov/36079275/

Comments

Article number: 5895

License type

CC BY (attribution alone)

Open Access Mode

open journal

Open Access Text Version

final published version

Date of Open Access to the publication

at the time of publication

Ministry points / journal

140

Impact Factor

3,4

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