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Постійне посилання на розділhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/35393
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Документ Effect of Glow-discharge Hydrogen Plasma Treatment on Zinc Oxide Layers Prepared through Pulsed Electrochemical Deposition and via SILAR Method(Sumy State University, 2019) Klochko, N. P.; Klepikova, K. S.; Petrushenko, S. I.; Nikitin, A. V.; Kopach, V. R.; Khrypunova, I. V.; Zhadan, D. O.; Dukarov, S. V.; Lyubov, V. M.; Khrypunova, A. L.In this work, we investigated the effect of glow-discharge H₂⁺ plasma treatment on ZnO layers deposited on fluorine doped tin oxide (FTO) glass substrates through low temperature aqueous solution growth, namely, via a pulsed electrochemical deposition and by successive ionic layer adsorption and reaction (SILAR) technique. It is shown that the crystal structure, surface morphology, chemical composition and optical properties obtain some destructive changes after plasma processing due to the creation of oxygen vacancies Vo and H-related defects, and additionally, because of the zinc oxide etching by the glow-discharge H₂⁺ plasma through reduction of zinc oxide and evaporation of Zn from the surface. Neverthe-less, our investigations show quite good stability of the ZnO layers to the plasma-induced radiation and chemical impacts under high total H₂⁺ fluence received by every ZnO/FTO sample ~ 8·10¹⁸ cm⁻².Документ Zinc oxide-nickel cermet selective coatings obtained by sequential electrodeposition(Elsevier, 2015) Klochko, N. P.; Klepikova, K. S.; Tyukhov, I. I.; Myagchenko, Y. O.; Melnychuk, E. E.; Kopach, V. R.; Khrypunov, G. S.; Lyubov, V. M.; Kopach, A. V.; Starikov, V. V.; Kirichenko, M. V.The investigation of pulse electrodepositing modes influence on crystal structure, morphology and optical properties of ZnO has revealed the conditions in which quasi-one-dimensional (1D) ZnO nanorod arrays are formed as separate nanorods. Due to a sufficiently high resistance of zinc oxide, the electrodeposition of nickel on the fluorine doped tin oxide (FTO)/ZnO surfaces carried out in space between the ZnO nanorods. An incomplete filling of the gaps between nanorods by the nickel nanoparticles through subsequent Ni electrodeposition ensured the creation of ZnO–Ni graded cermets. The cermets, in which electrochemical filling of the spaces between ZnO nanorods by Ni, was performed in the pulse mode. It provided higher absorption of visible and near IR light. It was shown that the manufactured ZnO–Ni graded cermets have high light absorption combined with comparatively low thermal losses, so these cermets are promising cheap and affordable selective coatings for solar heat collectors.Документ Influence of UV light of extraterrestrial solar irradiance on structure and properties of ZnO films prepared through pulsed electrochemical deposition and via SILAR method(Сумський державний університет, 2018) Klochko, N. P.; Klepikova, K. S.; Petrushenko, S. I.; Kopach, V. R.; Khrypunov, G. S.; Zhadan, D. O.; Dukarov, S. V.; Lyubov, V. M.; Kirichenko, M. V.; Surovitskiy, S. V.; Khrypunova, A. L.The investigations of effect of long-wave (UVA) and short-wave (UVC) ultraviolet light of extraterres-trial solar irradiance on the nanostructured zinc oxide arrays, which were grown by pulsed electrodeposition, as well as on the ZnO and ZnO:In films produced by Successive Ionic Layer Adsorption and Reaction technique (SILAR) confirmed their suitability as UVA-active photosensitive materials. The crystal structure, surface morphology, chemical composition and optical properties found no obvious significant destructive changes after UVC irradiation. However, we detected some irreversible changes in the nature of point defects under the influence of UVC, which affect the ZnO and ZnO:In resistivity, activation energy, photosensitivity and thermoelectrical properties.Документ Nanostructured ZnO arrays fabricated via pulsed electrodeposition and coated with Ag nanoparticles for ultraviolet photosensors(Сумський державний університет, 2018) Klochko, N. P.; Klepikova, K. S.; Petrushenko, S. I.; Kopach, V. R.; Khrypunov, G. S.; Korsun, V. E.; Lyubov, V. M.; Kirichenko, M. V.; Dukarov, S. V.; Khrypunova, A. L.Nanostructured one-dimensional (1-D) ZnO arrays fabricated via pulsed electrodeposition and coated with Ag nanoparticles are researched with the aim of their using in the ultraviolet (UV) photosensors. The results of the crystal structure investigations showed that the pulsed electrodeposited zinc oxide arrays are polycrystalline in nature and matching with hexagonal wurtzite modification of ZnO. To enhance its UV photosensitivity, the silver nanoparticles (AgNPs) with different shape and an average size of 60 nm, as well as 300-500 nm long Ag nanorods with ~30 nm diameter, are precipitated mainly on the (002), (101) and (100) ZnO planes. Study of electrical properties and electronic parameters of the 1-D ZnO and Ag/ZnO nanocomposites using a current-voltage and capacity-voltage characteristics identified the important role of the high double Schottky barriers at the ZnO intergrain boundaries for the creation of great UV photo-sensitivity. It is proved that through monitoring the amount of AgNPs on the ZnO surface the electrical properties and electronic parameters of the Ag/ZnO nanocomposites, and consequently, the output parameters of the UV photosensors can be controlled.