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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2026-06-11 23:58 |
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Conference: Bucharest University Faculty of Physics 2026 Meeting
Section: Solid State Physics and Materials Science
Title:
Electrical properties of semi-transparent nanostructured thin films of (Ni,Cu,Mg)OxNy mixture
Authors:
Cristian Vasilache(1), Claudiu Locovei(1,2), Sorina Iftimie(1), Adrian Radu(1), Aurel Leca(2) and Victor Kuncser(2)
Affiliation:
1)Faculty of Physics, University of Bucharest, Atomistilor 405, Magurele, 077125, Ilfov, Romania
2)National Institute of Materials Physics, Atomistilor 405A, Magurele, 077125, Ilfov, Romania
E-mail
cristianvasilache03@gmail.com
Keywords:
semi-transparent thin films; p-type conductivity; temperature-dependent Hall Effect; magnetron sputtering deposition
Abstract:
A comprehensive set of thin films of (Ni,Cu,Mg)OxNy with various composition were prepared by magnetron sputtering on glass substrates. The structural characterization reveals the condensation of different phases according with the deposition parameters. The X-ray Reflectometry curves show thicknesses of tens of nanometers for all thin films. UV-Vis spectroscopy performed in the interval 300-800 nm highlighted a minimum value for transmittance of 25% and a maximum one of 45%, both taken at 550nm. Despite the usual intrinsic p-type conductivity of nickel and, respectively, copper oxides, most of the (Ni,Cu,Mg)OxNy samples show n-type electrical behavior from room temperature until 10K. Nonetheless, the thin film with the highest concentration of Mg presents the transmittance of 45% and p-type conductivity with a resistivity of 7.8·10-3 Ω·cm at room temperature.
References:
1)C. Suryanarayana, M. G. (1998). X-Ray Diffraction A Practical Approach. Planum Publishing Corporation.
2)Milton Ohring (2002). Materials science of Thin Films – Deposition and Structure – Elsevier. Academic Press.
3)Hideaki Adachi, Tomonobu Hata, Tomoaki Matsushima, Tomoyoshi Motohiro, Kikuo Tominaga (2012). Handbook of Sputter Deposition Technology – Second Edition. Elsevier.
4)J. Kunes, V. I. Anisimov, S. L. Skornyakov,A. V. Lukoyanov and D. Vollhardt - NiO: Correlated Bandstructure of a Charge-Transfer Insulator.
5)W.Y. Ching and Yong-Nian Xu – Ground-state and optical properties of Cu2O and CuO crystals
6)Aleksandar Živkovic, Alberto Roldan, and Nora H. de Leeuw- Density functional theory study explaining the underperformance of copper oxides as photovoltaic absorbers
Acknowledgement:
The financial support by Core Program PC2-PN2308020 at National Institute of Materials Physics is acknowledged. This work was also supported by the R&D Center for Materials and Electronic & Optoelectronic Devices from Faculty of Physics, University of Bucharest.
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