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Item Effect of deposition temperature on the growth mechanism of chemically prepared CZTGeS thin films(John Wiley & Sons, Ltd., 2019) Шамардін, Антон Володимирович; Шамардин, Антон Владимирович; Shamardin, Anton Vladimirovych; Курбатов, Денис Ігорович; Курбатов, Денис Игоревич; Kurbatov, Denys Ihorovych; Medvids, ArtursThe Cu2ZnSnGeS4 (CZTGeS) thin films were deposited by the spray pyrolysis method at different substrate temperatures without further sulfurization. The influence of various deposition temperatures on the surface morphology, microstructure, optical properties, chemical, and phase composition were investigated. The substitution mechanism of Sn/Ge in the crystal lattice of CZTGeS depending on deposition temperatures was studied. It was shown that a variation in substrate temperature has a strong effect on the surface morphology of the films. The X‐ray diffractometer (XRD), transmission electron microscope (TEM), and Raman spectroscopy (RS) analysis showed that CZTGeS films were polycrystalline with a kesterite‐type single‐phase structure and a preferential orientation of (112). The RS‐mapping analysis showed the distribution of intensities on the surfaces of the films. Optical measurements showed that CZTGeS films are highly absorbing in the visible region, and the optical band gap is shifted from 1.89 to 1.84 eV.Item Determination of fundamental optical constant of Zn2SnO4 films(V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 2017) Салогуб, Анна Олександрівна; Салогуб, Анна Александровна; Salohub, Anna Oleksandrivna; Возний, Андрій Андрійович; Возный, Андрей Андреевич; Voznyi, Andrii Andriiovych; Климов, Олексій Володимирович; Климов, Алексей Владимирович; Klymov, Oleksii Volodymyrovych; Safryuk, N.V.; Курбатов, Денис Ігорович; Курбатов, Денис Игоревич; Kurbatov, Denys Ihorovych; Опанасюк, Анатолій Сергійович; Опанасюк, Анатолий Сергеевич; Opanasiuk, Anatolii SerhiiovychExamined in this paper have been optical properties of polycrystalline films Zn2SnO4 deposited using the spray pyrolysis method within the range of substrate temperatures 250 °C to 450 °C in increments of 50 °C. The spectral dependences have been found for the following physical quantities: k(λ), n(λ), ε1(λ), ε2(λ) and defined as they change under the influence of substrate temperature Тs. Moreover, using the model by Wemple–DiDomenico it was calculated the dispersion energy Ео and Ed for this oxide. Two independent methods defined band gaps Zn2SnO4, which decreases from 4.21…4.22 eV down to 4.04…4.05 eV with increasing Тs from 250 °C up to 450 °C.Item Luminescent and optical characteristics of Zinc Sulfide thin films produced by close-spaced vacuum sublimation(Romanian Academy published by Editura Academiei Romane, 2010) Курбатов, Денис Ігорович; Курбатов, Денис Игоревич; Kurbatov, Denys Ihorovych; Опанасюк, Анатолій Сергійович; Опанасюк, Анатолий Сергеевич; Opanasiuk, Anatolii Serhiiovych; Кшнякіна, Світлана Іванівна; Кшнякина, Светлана Ивановна; Kshniakina, Svitlana Ivanivna; Мельник, В.; Мельник, В.; Mеlnik, V.; Несправа, В.; Несправа, В.; Nesprava, V.The luminescent and optical characteristics of ZnS thin films produced by close-spaced vacuum sublimation technique (CSVS) were investigated in this work. Luminescent and optical investigations allowed determining the fluorescence centers of native defects and uncontrolled impurities.Item Influence of substrate temperature on the structural and optical properties of crystalline ZnO films obtained by pulsed spray pyrolysis(Surface and Interface Analysis, 2015) Доброжан, Олександр Анатолійович; Доброжан, Александр Анатольевич; Dobrozhan, Oleksandr Anatoliiovych; Курбатов, Денис Ігорович; Курбатов, Денис Игоревич; Kurbatov, Denys Ihorovych; Опанасюк, Анатолій Сергійович; Опанасюк, Анатолий Сергеевич; Opanasiuk, Anatolii Serhiiovych; Хіонсік, Чеонг; Хионсик, Чеонг; Hyeonsik, Cheong; Ендрю, Кебот; Эндрю, Кебот; Andreu, CabotIn this work, we report on the structural and optical properties of ZnO films deposited by pulsed spray pyrolysis at relatively low temperatures, compatiblewith a large variety of substrates and processing technologies. Crystalline ZnO films were deposited onto glass substrates using zinc acetate dihydrate dissolved in distilled water with concentration of 0.2M. The temperature of the substrate was varied in the range Ts = 473–673K with ΔТ = 50 K. Effect of Ts were investigated by scanning electron microscopy, x-ray diffraction and energy dispersive x-ray, and optical spectroscopies. Also, the influence of Ts on the grain size, phase composition, texture quality, coherent scattering domain size, crystal lattice parameters, chemical composition, ransmission coefficient, and the bang gap of the ZnO films were studied. X-ray diffraction analysis revealed that films were polycrystalline with hexagonal phase and showed as preferential orientation (101) at Ts<573 K and (100) and (002) at Ts>573 K. Scanning electron microscopy (SEM) measurements showed that the substrate temperature has a strong effect on morphology of the films. Energy dispersive analysis revealed that ZnO films consisted of the non-stoichiometric compounds. Optical measurements showed ZnO films to be highly transparent in the visible region, and optical band gap is shifting from 3.18 eV to 3.30 eV.Item Оптичні властивості плівок Zn[1-x]Mn[x]Te, отриманих методом сублімації у квазізамкненому об'ємі(Сумський державний університет, 2014) Климов, Олексій Володимирович; Климов, Алексей Владимирович; Klymov, Oleksii Volodymyrovych; Курбатов, Денис Ігорович; Курбатов, Денис Игоревич; Kurbatov, Denys Ihorovych; Єрьоменко, Ю.С.; Кудій, Д.А.Останнім часом значно зріс інтерес вчених в області матеріалознавства до отримання і дослідження нових плівкових матеріалів для оптоелектроніки, геліоенергетики та спінтроніки. До таких матеріалів відносять халькогенідні сполуки групи А2В6, а також напівмагнітні тверді розчини на їх основі, одним з яких є Zn[1-x]Mn[x]Te. Особливості даного матеріалу дозволяють використовувати його як віконні шари сонячних елементах. Проте оптичні властивості цієї сполуки вивчені недостатньо.Item Structural and optical properties of vacuum-deposited ZnS nanostructures(WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2013) Курбатов, Денис Ігорович; Курбатов, Денис Игоревич; Kurbatov, Denys Ihorovych; Опанасюк, Анатолій Сергійович; Опанасюк, Анатолий Сергеевич; Opanasiuk, Anatolii Serhiiovych; Sofronov, D.; Sofronov, D.; Sofronov, D.; Khlyap, H.; Khlyap, H.; Khlyap, H.In this paper some structural, substructural and optical proper- ties of zinc sulfide nanostructures obtained by a CSVS method on bulk ZnSe are investigated. Examination of optical and substructural properties was performed by infrared spectro- scopy and X-ray diffraction, respectively. The results of these studies enabled determination of the dependence of the main structural film parameters (texture, lattice parameters, grain and X-ray scattering domain sizes, and microstrain) on the growth conditions. IR-spectral distributions of transmission coefficient T(n) for bilayered ZnS/ZnSe nanostructures are obtained. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/33234