Кафедра "Природничі науки"

Постійне посилання колекціїhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/1703

Увага! Поповнення колекції кафедри "Природничі науки" від травня 2023 року тимчасово призупинено.

Офіційний сайт кафедри http://web.kpi.kharkov.ua/ken

Кафедра "Природничі науки" заснована в 1973 році.

Кафедра забезпечувала викладання дисциплін природничого циклу іноземним громадянам, які готуються продовжувати навчання у вищих навчальних закладах України.

Студенти отримують необхідний рівень знань з природничих дисциплін і мають можливість вступати в будь-які вузи України для подальшого навчання.

Кафедра входить до складу Навчально-наукового інституту міжнародної освіти Національного технічного університету "Харківський політехнічний інститут".

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2017 - 20194

Налаштування

Автор: search.filters.author.Mygushchenko, R. P.Ключові слова: search.filters.subject.direct current magnetron sputtering

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Зараз показуємо 1 - 4 з 4
  • Ескіз
    Документ
    Structure and Optical Properties CdS and CdTe Films on Flexible Substrate Obtained by DC Magnetron Sputtering for Solar Cells
    (Сумський державний університет, 2017) Kopach, G. I.; Mygushchenko, R. P.; Khrypunov, G. S.; Dobrozhan, A. I.; Harchenko, M. M.
    The paper describes investigate of crystal structure and optical characteristics of the CdS transparent window layers and the CdTe base layers, obtained by direct current magnetron sputtering on glass or polyimide substrate, and output parameters the flexible thin film solar cells based on them. The band gap in obtained hexagonal CdS films is Eg = 2.38-2.41 eV and optical transparency of CdS films is 80-90%. Conducting chloride treatment of CdTe layers, obtained at Tп < 300 °C, promotes wurtzite-sphalerite phase transition. Cooling ITO/CdS layers to room temperature before CdTe deposition, removal of the air and subsequent heating in vacuum to the required temperature of the substrate leads to an increase of the energy conversion efficiency and open circuit voltage of the polyimide/ITO/CdS/CdTe/Cu/Ag flexible solar cell.
  • Ескіз
    Документ
    Structure and optical properties of CdS polycrystalline layers for solar cells based on CdS/CdTe
    (Науково-технологічний комплекс "Інститут монокристалів", 2019) Khrypunov, G. S.; Kopach, G. I.; Dobrozhan, A. I.; Mygushchenko, R. P.; Kropachek, О. Y.; Lyubov, V. M.
    Thin CdS films about 200-500 nm thick with stable hexagonal modification with 85-80 % transparency value respectively in the visible and infrared spectrum regions were investigated. The use of the FTO sublayer to obtain heterosystem glass/FTO/CdS by magnetron sputtering does not affect the phase composition of the cadmium sulfide layer and the width of the band gap (Eg = 2.42-2.44 eV). Cadmium sulfide thin films, obtained by direct current magnetron sputtering, can be used as a layer of a wide window layer in thin-film solar cells based on the CdS/CdTe heterosystem.
  • Ескіз
    Документ
    Study Solid Solutions in CdS/CdTe Thin Films Heterosystems Obtaine by DC Magnetron Sputtering
    (Institute of Electrical and Electronics Engineers, 2018) Dobrozhan, A. I.; Kopach, G. I.; Mygushchenko, R. P.; Khrypunov, G. S.; Harchenko, M. M.; Polezhaeva, O. V.
    The influence of physical and technological condensation mode by direct current magnetron sputtering on the crystal structure and optical properties of grown CdS and CdTe films, CdS/CdTe thin films heterosystems was investigated. Traditional chloride treatment of thin-film CdS/CdТе heterosystem leads to recrystallization of CdTe basic layer and its wurtzite-sphalerite phase transition. After Cl treatment a bandgap in CdTe increases up to 1.5 eV. For CdS/CdТе heterosystem a decrease of a bandgap to 1.45 eV is observed which is determined by formation of solid solutions of CdSхТе₁₋ₓ at the interphase boundary of CdS/CdТе. The value of the stoichiometric parameter х=0,1±0,01 was calculated using the optical researches data.
  • Ескіз
    Документ
    Structure and Optical Properties of CdS Nanoscale Thin Films Obtained by Direct Current Magnetron Sputtering
    (Institute of Electrical and Electronics Engineers, 2017) Kopach, G. I.; Mygushchenko, R. P.; Khrypunov, G. S.; Dobrozhan, A. I.; Harchenko, M. M.
    The influence of physical and technological condensation mode by direct current magnetron sputtering with preheating of the target on the crystal structure and optical properties of grown CdS nanoscale thin films was investigated. CdS layers on glass substrates with hexagonal structure 80-100 nm thick under conditions plasma discharge current density is 1.1 mA/cm² and the deposition rate is 18-20 nm/min were obtained. The band gap CdS in nanoscale thin films is Eg=2,4-2,43 eV. After annealing in vacuum optical transparency of CdS films is 90%, which allows to use such nanoscale thin films as a transparent window layer in solar cells based on heterostructure of CdS/CdTe.