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Information × Registration Number 0223U002069, 0122U001956 , R & D reports Title Nanostructured metasurfaces for sensors and photovoltaics popup.stage_title Head Dmytruk Ihor M., Доктор фізико-математичних наук Registration Date 07-02-2023 Organization Taras Shevchenko National University of Kyiv popup.description2 Object of research – Nanostructured metasurfaces based on various types of plasmonic metal, semiconductor and hybrid metal-semiconductor elements. Purpose of research work – study of the fundamental mechanisms of the interaction of EM radiation with nanostructured metasurfaces of various types, including plasmonic metasurfaces based on laser-structured metal or semiconductor surfaces and metal nanoparticles (NP) of various shapes or nanowires, to improve the efficiency of new hybrid photovoltaic cells (PhC) and implementation of plasmonic sensors. Laser-induced periodic surface structures (LIPSS) on metal surfaces, LIPSS on Al-Si, Au-Si metal-semiconductor surfaces were formed under the impact of femtosecond radiation with a wavelength of 800 or 1300 nm and variable laser power density; the morphological features and the sample parameters were analysed depending on the processing regimes. Morphological features and parameters of the formed structures were analysed using scanning electron microscopy. For the first time, LIPSS on Al-Si metal-semiconductor surface (λexc. = 800 nm) was formed, and also LIPSS on Au-Si metal-semiconductor surface (λexc. = 1300 nm). The structure features formed on the surface of PbI2 semiconductor under an impact of femtosecond laser radiation with a wavelength of 800 nm were determined. The changes in Raman and photoluminescence (PL) spectra were evaluated depending on the power of irradiation. It has been demonstrated an enhancement (up to 1.9 times) of the vibrational bands in Raman spectra of structured PbI2 compared to the untreated sample. The maximum efficiency (4.82%) was recorded for PEDOT:PSS/Si photovoltaic cell with a quasigrating type of interface and a modified PEDOT:PSS film which exceeded the values for the structure with flat interface. Enhancement of PL and Raman intensities of 2D MoS2 due to the decoration with Au nanoparticles of cylindrical (NC) or spherical (NS)shape were studied. Product Description popup.authors Yeshchenko Oleh А. Berezovska Nataliya I. Grabovskyi Evgen S. Mamykin Sergii V. Pundyk Iryna P. Stanovyy Oleksandr P. Fedotov Oles Yu. Khort Pavlo S. popup.nrat_date 2023-02-07 Close