Видання зареєстровані авторами шляхом самоархівування
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Item Structural and Optical Properties of CuO Thin Films Synthesized Using Spray Pyrolysis Method(MDPI, 2021) Д'яченко, Олексій Вікторович; Дьяченко, Алексей Викторович; Diachenko, Oleksii Viktorovych; Kováˇc, Jr.; Доброжан, Олександр Анатолійович; Доброжан, Александр Анатольевич; Dobrozhan, Oleksandr Anatoliiovych; Novák, P.; Kováˇc, J.; Skriniarova, J.; Опанасюк, Анатолій Сергійович; Опанасюк, Анатолий Сергеевич; Opanasiuk, Anatolii SerhiiovychCopper oxide thin films were obtained using pulsating spray pyrolysis method. The morphological, structural, and optical properties of fabricated films were studied. X-ray analysis revealed that the CuO thin films are single-phase. The study of films morphology by SEM and AFM methods showed that the obtained films have a fairly high surface roughness and contain grains of different shapes and sizes. It was found that the obtained films of copper oxide have high values of the absorption coefficient, which confirms the possibility of their use as absorbing layers for solar cells. The obtained values of the optical band gap of the material are in the range from 1.45 eV to 1.60 eV. Raman spectroscopy revealed three modes A1g, B1g, and B2g, of the crystal structure of monoclinic CuO. The devices based on p-type copper oxide are promising for solar cells fabrication because they can reduce production costs, due to their low cost and inexpensive production methods compared to silicon solar cells fabrication.Item Substructural Properties and Anisotropic Peak Broadening in Zn(1-x)MnxTe Films Determined by a Combined Methodology Based on SEM, HRTEM, XRD, and HRXRD(Springer, 2016) Martinez-Tomas, С.; Климов, Олексій Володимирович; Климов, Алексей Владимирович; Klymov, Oleksii Volodymyrovych; Agouram, S.; Курбатов, Денис Ігорович; Курбатов, Денис Игоревич; Kurbatov, Denys Ihorovych; Опанасюк, Анатолій Сергійович; Опанасюк, Анатолий Сергеевич; Opanasiuk, Anatolii Serhiiovych; Muñoz-Sanjosé, V.Lattice deformation and extended defects such as grain boundaries and dislocations affect the crystalline quality of films and can dramatically change material’s properties. In particular, magnetic and optoelectronic properties depend strongly on these structural and substructural characteristics. In this paper, a combined methodology based on SEM, HRTEM, XRD, and HRXRD measurements is used to determine and assess the structural and substructural characteristics of films. This combined methodology has been applied to Zn1-xMnxTe films grown on glass substrates by close-spaced vacuum sublimation. Nevertheless the methodology can be applied to a wide variety of materials and could become a useful characterization method which would be particularly valuable in semiconductor growth field. The knowledge of the structural and substructural characteristics can allow not only the optimization of growth parameters, but also the selection of specific samples having the desired characteristics (crystallite size, minimum dislocation content, etc.) for high-quality technological devices.Item Investigation of Optical Properties of Magnesium Oxide Films Obtained by Spray Pyrolysis Technique(Odessa I. I. Mechnikov National University, 2016) Д`яченко, Олексій Вікторович; Дьяченко, Алексей Викторович; Diachenko, Oleksii Viktorovych; Опанасюк, Анатолій Сергійович; Опанасюк, Анатолий Сергеевич; Opanasiuk, Anatolii Serhiiovych; Курбатов, Денис Ігорович; Курбатов, Денис Игоревич; Kurbatov, Denys Ihorovych; Cheong, H.Today more and more areas of optoelectronics used oxide materials, as a result, their study, is very important . Therefore, in this paper, we study optical properties of magnesium oxide films. band gap, spray-pyrolysis, optoelectronics, optical properties.Item Superhardness Effect in TransitionMetal Diborides Films(Pleiades Publishing, Ltd, 2016) Bazhin, A.I.; Goncharov, A.A.; Stupak, V.A.; Погребняк, Олександр Дмитрович; Погребняк, Александр Дмитриевич; Pohrebniak, Oleksandr Dmytrovych; Гончарова, Світлана Анатоліївна; Гончарова, Светлана Анатольевна; Honcharova, Svitlana AnatoliivnaThe structure, composition, and properties of transitionmetal diboride films have been studied. It was shown that they are characterized by a wide range of structural states, namely from amorphouslike to nanocrystalline with crystallite sizes of 1–50 nm. The characteristic peculiarity of the structure of film transitionmetal diborides with high physical and mechanical properties is the formation of a nanocrystalline (columnar) structure with the growth texture in plane [00.1] and a nanocrystallite size of 20–50 nm. The element composition of a superhard highly textured film transitionmetal diborides was studied by ion mass spectrometry and Auger electron spectroscopy. The overstoichiometry effect in nanocrystalline transition metal diboride films is explained. It was shown that this effect is related to the formation of an additional B⎯B covalent bond, which is realized at subgrain boundaries and leads to the appearance of superhardness in the formed coatings. KeywoItem Nanostructured NaBiTe2 thin films and their properties(Видавництво СумДУ, 2011) Bilozertseva, V.I.; Gaman, D.A.; Khlyap, H.M.; Mamalui, A.A.; Dyakonenko, N.I.; Petrenko, L.G.Multicomponent chalcogenide-contained films are appeared as an interesting nonequilibrium thermodynamic system. Structural and electric field-induced characteristics of these materials are not investigated. The paper reports for the first time experimental data on growth, morphology and electrophysical properties of NaBiTe2 thin films. The investigated samples were condensed on glass substrates under deposition rate 0.1-0.5 nm/s at T = 300 K and vacuum level P = 10-3 Pa. Metal-semiconductor (MS) Cr/NaBiTe2 structures were prepared for electrical studies. Room-temperature time dependence of the current flowing through the investigated structure under applied electric field is also discussed. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/20541