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Keywords = p-PCD/n-Si heterojunction

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10 pages, 2122 KB  
Article
The Barrier’s Heights and Its Inhomogeneities on Diamond Silicon Interfaces
by Szymon Łoś, Kazimierz Fabisiak, Kazimierz Paprocki, Wojciech Kozera, Tomasz Knapowski, Mirosław Szybowicz and Anna Dychalska
Materials 2022, 15(17), 5895; https://doi.org/10.3390/ma15175895 - 26 Aug 2022
Cited by 2 | Viewed by 2103
Abstract
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 [...] Read more.
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*). Full article
(This article belongs to the Special Issue Diamond Material and Its Applications)
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