Issues »  Volume 37, Issue 11

Emission Characteristics of Nitrogen-Doped Nanostructure Diamond Coating Synthesized in Glow Discharge Plasma

S. F. Dudnyk$^{1}$, K. I. Koshevoi$^{1}$, M. M. Nishchenko$^{2}$, S. V. Smolnik$^{2}$, V. E. Strelnytskyi$^{1}$, M. Ya. Shevchenko$^{2}$

$^{1}$National Science Center Kharkov Institute of Physics and Technology, NAS of Ukraine, 1 Akademicheskaya Str., 61108 Kharkov, Ukraine
$^{2}$G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine

Received: 17.09.2015. Download: PDF

The emission characteristics of the nitrogen-doped nanostructure diamond coatings with a resistivity in the range of 2.3$\cdot$10$^{4}$—4$\cdot$10$^{1}$ Ohm$\cdot$cm obtained in glow discharge plasma under different conditions are investigated. As shown, the emission current from the sample surface appears after the removing of impurities during annealing in the range 603—818 K, which create surface acceptor electron states of p-type. That states affect the work function determined by the contact potential difference of shifting current—voltage characteristics. For the nanostructure diamond coating with a resistivity of 2.4$\cdot$10$^{2}$ Ohm$\cdot$cm, the lowest value of the work function of 1.28 eV and the highest current density of 6.9 mA/cm$^{2}$ at 963 K are determined.

Key words: diamond films, thermionic emission, work function, surface electron states.

URL: http://mfint.imp.kiev.ua/en/abstract/v37/i11/1487.html

DOI: https://doi.org/10.15407/mfint.37.11.1487

PACS: 65.40.gh, 73.20.At,73.30.+y, 73.63.Bd, 79.40.+z, 81.05.uj, 81.65.Lp

Citation: S. F. Dudnyk, K. I. Koshevoi, M. M. Nishchenko, S. V. Smolnik, V. E. Strelnytskyi, and M. Ya. Shevchenko, Emission Characteristics of Nitrogen-Doped Nanostructure Diamond Coating Synthesized in Glow Discharge Plasma, Metallofiz. Noveishie Tekhnol., 37, No. 11: 1487—1501 (2015) (in Russian)

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