Кафедри
Постійне посилання на розділhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/35393
Переглянути
14 результатів
Результати пошуку
Документ Effect of extraterrestrial solar UV radiation on structure and properties of ZnO films obtained by wet chemical methods(Vasyl Stefanyk Precarpatian National University, 2019) Klochko, N. P.; Khrypunova, I. V.; Klepikova, K. S.; Petrushenko, S. I.; Kopach, V. R.; Zhadan, D. O.; Khrypunova, A. L.; Dukarov, S. V.; Lyubov, V. M.; Kirichenko, M. V.Документ Nanostructured СuI thin films on biodegradable nanocellulose flexible substrates for UV-shielding applications(Kamianets-Podіlskyi National Ivan Ohiienko University, 2020) Klochko, N. P.; Barbash, V. A.; Klepikova, K. S.; Kopach, V. R.; Yashchenko, O. V.; Zhadan, D. O.; Petrushenko, S. I.; Dukarov, S. V.; Sukhov, V. M.; Khrypunova, A. L.Документ Nanostructured Thermoelectric Thin Films Obtained by Wet Chemical Synthesis(Sumy State University, 2017) Klochko, N. P.; Kopach, V. R.; Khrypunov, G. S.; Korsun, V. E.; Lyubov, V. M.; Otchenashko, О. N.; Zhadan, D. O.; Kirichenko, M. V.; Nikitin, V. О.; Maslak, M. O.; Khrypunova, A. L.Nanostructured pristine lead sulfide and copper iodide semiconductor films as well as copper doped lead sulfide and iodine-enriched copper iodide layers were obtained on solid and flexible substrates via Chemical Bath Deposition (CBD) and Successive Ionic Layer Adsorption and Reaction (SILAR) methods. Crystal structures, optical, electric and thermoelectric properties of the layers have been studied. It was shown that the obtained films deposited on glass and mica substrates are smooth and continuous, have polycrystalline structures of the corresponding bulk semiconductors with grain sizes of several tens of nanometers. Investigations of the optical properties revealed, that their band gaps are characteristic for the corresponding bulk materials. All obtained semiconductor layers are p-type of conductivity. The resistivity of the lead sulphide films were reduced noticeably by means of their doping with copper. Iodination of the copper iodide films convert them into degenerate semiconductors. Investigations of the temperature dependent resistivity, the Seebeck coefficients and power factors confirmed that the obtained materials are promising for their use in thin-film solar thermoelectric generators with the aim of solar heat transforming into electricity.Документ Wettability of the cotton and polyester tissues coated by nanostructured indium-doped zinc oxide layers(Ivan Franko National University of Lviv, 2020) Klochko, N. P.; Khrypunova, I. V.; Klepikova, K. S.; Kopach, V. R.; Zhadan, D. O.; Petrushenko, S. I.; Dukarov, S. V.; Lyubov, V. M.; Kirichenko, M. V.; Khrypunova, A. L.Документ Nanostructured ZnO and CuI Thin Films on Poly (Ethylene Terephthalate) Tapes for UV-Shielding Applications(Sumy State University, 2020) Klochko, N. P.; Klepikova, K. S.; Zhadan, D. O.; Kopach, V. R.; Khrypunova, I. V.; Petrushenko, S. I.; Dukarov, S. V.; Lyubov, V. M.; Khrypunova, A. L.In this work, we study a suitability for protection against terrestrial ultraviolet part of the solar spectrum of undoped and doped by indium zinc oxide thin nanostructured films, ZnO and ZnO:In, respectively, and cuprous iodide (CuI) films obtained via Successive Ionic Layer Adsorption and Reaction (SILAR) techniques on the lightweight low cost poly(ethylene terephthalate) (PET) flexible substrates. The film morphology is observed by scanning electron microscopy (SEM). Chemical compositions of the films are investigated by X-ray fluorescence (XRF) microanalysis. To research crystal structure we used X-ray diffraction (XRD) method. The UV-protection ability of the nanostructured thin films, PET tapes and samples consisting of the PET substrates and the films deposited on them by the SILAR method has been evaluated on the base of their optical properties in accordance with an international standard ISO 2443:2012(E) “Determination of sunscreen UVA photoprotection in vitro”. According to the research, nanostructured ZnO, ZnO:In and CuI thin films made by the cheap, affordable, and suitable for mass production SILAR method on thin flexible cheap PET substrates have been proposed as a new material for UV-shielding applications. In accordance with an international standard ISO 2443:2012(E), UV-protection ability of the samples consisting of the PET substrates and the films deposited on them by the SILAR method fits the category “excellent” (50+). The best low cost flexible and lightweight UV shielding material turned out to be that consisted from ZnO:In film and PET substrate, the sun protection factor of which equals 157.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 Flexible thermoelectric module based on zinc oxide thin film grown via SILAR(2021) Klochko, N. P.; Klepikova, K. S.; Khrypunova, I. V.; Zhadan, D. O.; Petrushenko, S. I.; Kopach, V. R.; Dukarov, S. V.; Sukhov, V. M.; Kirichenko, M. V.; Khrypunova, A. L.In this work, we used the low temperature solution growth Successive Ionic Layer Adsorption and Reaction (SILAR) for a deposition of the nanostructured undoped and indium doped (ZnO and ZnO:In) thin films on flexible polyimide (PI) substrates for their use as cheap non-toxic thermoelectric materials in the flexible thermoelectric modules of planar type to power up portable and wearable electronics and miniature devices. The use of a zincate solution in the SILAR method allows to obtain ZnO:In film, which after post-growth annealing at 300 ◦C has low resistivity ρ ≈ 0.02 Ω m, and high Seebeck coefficient 147 μV/K and thermoelectric power factor at near-room temperatures. As evidence of the operability of the manufactured films as the basis of the TE device, we have designed and tested experimental lightweight thin-film thermoelectric module. This TE module is able to produce specific output power 0.8 μW/m2 at ΔT = 50 K.Документ Thermoelectric textile with fibers coated by copper iodide thin films(2020) Klochko, N. P.; Klepikova, K. S.; Zhadan, D. O.; Kopach, V. R.; Chernyavskaya, S. M.; Petrushenko, S. I.; Dukarov, S. V.; Lyubov, V. M.; Khrypunova, A. L.Here we obtained thermoelectric (TE) textiles on the base of the commercial cotton and polyester fabrics. For this we used deposition of copper iodide (CuI) thin films via low-temperature cheap and scalable method Successive Ionic Layer Adsorption and Reaction (SILAR). The TE textiles are comfortable to wear, breathable, nontoxic, light-weight, flexible and air-permeable. The CuI films in the TE textiles are composed of accreted flakes with nanoscale thickness (<50 nm) or of nanowalls. Their crystal grains are less than 50 nm, contain a significant number of dislocations and an increased lattice parameter, and consequently have large compression microstrains. The TE textiles with CuI coated cotton and polyester have the Seebeck coefficients in the range of 120–180 μV K−1, which are constant at the temperatures 290–365 K. The most effective single p-CuI thermoelectric leg has low internal resistance 2 kΩ. Its specific output power at temperature gradient 50 K is 31 μW/m2. Three experimental flexible wearable TEGs of simple and affordable designs having each four thermocouples with n-Alumel and p-CuI thermoelectric legs on the thick cotton, thin cotton and polyester confirm the possibility of obtaining electricity using the developed TE textiles under conditions of temperature gradients from 5 to 50 K at near-room temperatures. The best TEG obtained on the polyester fabric has at temperature difference 50 K output TE characteristics: open circuit voltage 44 mV, short circuit current 1.3 µA, output power 16 nW. These characteristics remain unchanged after repeated bends of TEGs in the different directions.Документ Structure, optical, electrical and thermoelectric properties of solution-processed Li-doped NiO films grown by SILAR(Elsevier Ltd, 2018) Klochko, N. P.; Klepikova, K. S.; Zhadan, D. O.; Petrushenko, S. I.; Kopach, V. R.; Khrypunov, G. S.; Lyubov, V. M.; Dukarov, S. V.; Nikitin, V. O.; Maslak, M. O.; Zakovorotniy, A. Yu.; Khrypunova, A. L.The article presents a new facial synthesis of Li-doped NiO films (NiO:Li) via an easy and cost-effective method Successive Ionic Layer Adsorption and Reaction (SILAR) with the processing of the obtained NiO films in a lithium-containing aqueous solution for their transformation after annealing into NiO:Li layers. Comparative analysis of crystal structure, optical, electrical and thermoelectric properties of the obtained NiO and NiO:Li 420-1050 nm thick films have reveiled a cubic rock-salt NiO structure, at that, NiO:Li samples are nanocrystalline single phased Li-NiO solid solutions. The fabricated NiO and NiO:Li films are p-type semiconductors with activation energy Ea = 0.1 eV and Ea = 0.25‒0.31 eV, respectively. The obtained in-plane Seebeck coefficients Z are in the range 0.20–0.33 mV/К. Notwithstanding the fact that the maximum values of the thermoelectric power factors P=2.2 μW/K2·m, are rather small, they were achieved if the hot end of the NiO:Li film was heated only to 115 °C. Thus, the produced in this work new low cost thermoelectric thin film material is suitable for a production of electrical energy for low-power devices due to absorption of low-potential heat.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.