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Prof. Luc Patthey (PSI - Paul Scherrer Institut)05/11/2025, 09:10
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Dr Oksana Chukova (Taras Shevchenko National University of Kyiv)05/11/2025, 09:50
The application of synchrotron radiation light sources has revolutionized materials research by offering unique capabilities for studying the structure, electronic properties and energy relaxation dynamics of materials at unprecedented levels of detail. In particular, use of pulsed synchrotron radiation is the most efficient way to provide necessary time and energy resolution of the excitation...
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Prof. Alexander Kordyuk (Kyiv Academic University)05/11/2025, 10:20
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Dr Ewa Partyka-Jankowska (SOLARIS National Synchrotron Radiation Centre)05/11/2025, 11:10
SOLARIS, located in Krakow, is a third-generation synchrotron facility and the only one in Central-Eastern Europe [1]. Since its first light in 2016 and the start of user operations in 2018, it has steadily expanded its infrastructure to support a wide range of scientific applications. Currently, researchers have access to seven beamlines and two cryo-electron microscopes, enabling techniques...
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Dr Artem Yakovliev (Institute of Nuclear Physics, Polish Academy of Sciences)05/11/2025, 11:40
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Dr Tomasz Sobol05/11/2025, 12:00
The PHELIX undulator beamline is installed at the synchrotron SOLARIS [1], a third-generation light source with an electron energy of 1.5 GeV and a current of 500 mA. The beamline is designed for experiments with ultra-high vacuum Photoelectron Spectroscopy (PES) and X-ray Absorption Spectroscopy (XAS) in the soft X-ray range. In the future, Ambient Pressure X-ray Photoelectron Spectroscopy...
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Prof. Andrew Harrison (Central European Research Infrastructure Consortium (CERIC-ERIC))05/11/2025, 13:30
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Dr Pavlo Plotko (German Center for Astrophysics and DESY)05/11/2025, 13:50
In recent years, Germany has played a key role in supporting Ukrainian science, particularly in the fields of physics, astrophysics, and research infrastructure development. The Deutsches Elektronen-Synchrotron (DESY) plays a significant part in this process as Germany’s leading national laboratory for accelerator physics, photon science, and astroparticle research.
Since the beginning of...
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Dr Valentine Volobuev (International Research Centre MagTop, Institute of Physics, Polish Academy of Sciences; National Technical University ”KhPI”)05/11/2025, 14:20
The band structure at the topological insulator/magnetic metal (TI/MM) interface is of great significance for realizing exotic spin-dependent phenomena and advanced spin–orbitronic devices. To investigate this interface, we employ a model system consisting of submonolayer transition metal (TM) adsorbates on the surface of a topological crystalline insulator (TCI) and examine it using the...
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Dr Volodymyr Bezguba (Kyiv Academic University)05/11/2025, 14:50
Quantum materials is a rather broad class of materials which have properties emerging from quantum mechanics and collective quantum effects, but can’t be explained in classical terms (perfect example being superconductors). Non-trivial topology of their electronic structure brings in even more interesting phenomenon which can be very desired for applications such as quantum computers and...
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Dr Sergii Chernov (DESY)05/11/2025, 15:15
We report a new ToF-PAX-RIXS endstation at P04 beamline at PETRA III, Hamburg, a development of a promising novel approach to RIXS. It is based on a ToF photoemission microscope (momentum and real space imaging), allowing ARPES and RIXS studies carried out back-to-back. While RIXS is a powerful method for studying low-energy quasiparticle excitations like phonons or magnons, ARPES remains the...
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Prof. Larysa Khomenkova (V. Lashkaryov Institute of Semiconductor Physics)05/11/2025, 15:30
The luminescent behaviour of transition-metal ions strongly depends on the host lattice structure, defect concentration, and cation site occupancy. Owing to their ability to adopt multiple oxidation states, Mn ions can serve as sensitive optical probes in wide-bandgap oxide ceramics. In this work, we investigated the light-emitting properties of Mn-doped ZnO–ZrO₂ ceramics using...
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Mr Ihor Sukhenko (Kurdyumov Institute for Metal Physics of the NAS of Ukraine)05/11/2025, 15:50
We report Cu K-edge XANES/EXAFS results on a series of Cu-substituted lead apatites Pb10-xCux(YO4)6Z (x ≈ 1), Y = P, V; Z = (OH)2, F2, Cl2, Br2, I2. The aim was to test the site preference and valence state of Cu in the apatite lattice, following the experiment proposed at SOLARIS/ASTRA. XANES edge positions and comparison to CuO/Cu₂O standards demonstrate that Cu is unambiguously in the Cu2+...
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Prof. Volodymyr Dzhagan06/11/2025, 09:00Laser processing of materials for advanced optoelectronic applicationsInvited Talk
A large number of modern micro- and optoelectronic devices and advanced sensor technologies does not require fabrication tools with ultimate resolution like a currently commercialized 2 nm technology of silicon-based chips. These are, for example, stand-alone microsensors or MEMS, for which a low price is preferred, while there is no need for close packing or miniaturization below m-scale....
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Dr Andrius Žemaitis (Center for Physical Sciences and Technology (FTMC), Vilnius, Lithuania)06/11/2025, 09:30Laser processing of materials for advanced optoelectronic applicationsInvited Talk
Ultrashort laser pulses enable precise material processing with exceptional spatial and temporal confinement. Because the pulse duration is shorter than the electron–phonon relaxation time, the material experiences minimal or no heat-affected zone. This phenomenon underpins most of the laser–matter interaction research conducted at the FTMC Laser Microfabrication Laboratory. Our activities...
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Dr Petro Lytvyn (V. Lashkaryov Institute of Semiconductor Physics NAS Ukraine, Kyiv, Ukraine)06/11/2025, 09:45Laser processing of materials for advanced optoelectronic applicationsOral
GeSn alloys are promising for CMOS-compatible photonics and electronics, offering band‐gap engineering from SWIR to MWIR, on-chip light sources/detectors, and strain-tunable high-mobility channels. Yet, pushing Sn content high enough for direct-gap behavior remains difficult due to low Sn solubility in Ge, growth-induced compressive strain, defect generation, and a tendency to segregate or...
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Prof. Alexei N. Nazarov (Lashkaryov Institute of Semicnductor Physics NAS of Ukraine)06/11/2025, 10:00Laser processing of materials for advanced optoelectronic applicationsOral
To form CMOS compatible graphene device the graphene oxide reduced by CW laser (455 nm) on SiO2/Si wafer was used. The graphene oxide water solution was deposited on SiO2/Si structure by drop casting method with following heating at 50°C for 1 hour. For reduction of the GrO film the laser power from 0.100 W to 0.800 W was employed, as in air and in nitrogen atmosphere. The part of samples was...
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Prof. Volodymyr Yukhymchuk (V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine)06/11/2025, 10:15Laser processing of materials for advanced optoelectronic applicationsOral
Ge1-xSnx alloys are promising CMOS-compatible materials for developing effective light absorbers and emitters integrated into Si opto- and nanoelectronics. Critical to this application is the transition from an indirect- to a direct-gap semiconductor, which is experimentally observed when the Sn content is in the 6–10 % range. The wide variation in Sn values is due to the sensitivity of the...
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Prof. Zinoviia Tsybrii (V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine)06/11/2025, 10:30Laser processing of materials for advanced optoelectronic applicationsOral
The efficient detection of terahertz (THz) waves remains a critical challenge, despite the vast potential of the THz spectrum. We present a method to significantly enhance the sensitivity of THz detectors featuring a metallic antenna on a conducting film with a dielectric substrate. The study utilizes mercury-cadmium-telluride (HgCdTe), a proven semiconductor for infrared detection, extending...
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Dr Yuriy Azhniuk (Institute of Electron Physics, Nat. Acad. Sci. Ukr., Uzhhorod, Ukraine)06/11/2025, 10:45Laser processing of materials for advanced optoelectronic applicationsOral
Amorphous arsenic chalcogenides are semiconductor materials known for numerous photoinduced effects under illumination by light of appropriate energy and intensity which makes them promising for various applications. We present a study of photoinduced formation of semiconductor nanocrystals in amorphous As–S(Se) films doped with metal atoms. The doped As2S3 and As2Se3 films with desired dopant...
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Dr Svitlana M. Levchenko (Faculty of Biochemistry, Biophysics, and Biotechnology, Jagiellonian University, Kraków, Poland)06/11/2025, 11:15Invited Talk
On average one cell suffers up to tens of thousands of DNA lesions per day, induced by endogenous and environmental factors [1-3]. Induction of DNA damage leads to the recruitment of repair factors and formation of a DNA repair focus. It is reasonable to expect that the numerous repair factors that are recruited to a damaged site transiently create a distinct local microenvironment surrounding...
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Dr Nazarii Tkach (Taras Shevchenko National University of Kyiv, Faculty of Physics)06/11/2025, 11:45
The indole-containing organic compounds represent a unique class of substances due to their broad biomedical activity such as antibacterial, antiviral, anti-inflammatory, and anticancer. Our ongoing study presents the design, synthesis, and spectral analysis of novel indole-containing compounds, specifically indolo[2,3-b]quinoxaline and indolo[2,1-b]quinazoline-6,12-dione derivatives, targeted...
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Dr Oksana Koplak (Università degli Studi di Milano-Bicocca)06/11/2025, 13:00
Anisotropic epitaxial growth of free-standing InGaN nanostructures remains a key technological challenge in light-emitting device development. Here, we report precise, stepwise control of InGaN nanostructure growth on Si(111) substrates using molecular beam epitaxy (MBE). Light nitridation of the Si(111) surface created nucleation centers that promoted the well-oriented formation of hexagonal...
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Hanna Petrosova (Taras Shevchenko National University of Kyiv)06/11/2025, 13:20
Hybrid halide perovskites containing small organic cations continue to attract attention as semiconducting materials for optoelectronic applications, which make them promising candidates for next-generation photovoltaic and optoelectronic devices. Among them, aziridinium-based perovskites represent an emerging class of compounds with distinctive structural and optoelectronic properties,...
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Olesia Kucheriv (Taras Shevchenko National University of Kyiv)06/11/2025, 13:35
Hybrid organic–inorganic perovskites remain at the forefront of materials research due to their tunable optoelectronic properties and structural diversity. In this work, we present a family of aziridinium-based hybrid perovskite-like materials of general formula (AzrH)₃M₂X₉ (M = Sb, Bi; X = Cl, Br, I), where the aziridinium cation (AzrH)⁺ acts as a versatile structure-directing template...
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Dr Valerii Sirenko (Department of Chemistry, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine)06/11/2025, 13:50
Hybrid organic-inorganic perovskites constitute a rapidly-growing family of solid-state semiconducting materials with remarkable potential in optoelectronic and photovoltaic applications. Their highly-tunable chemical composition enables emission across a broad spectral range; however, efficient violet-blue emitting perovskites remain relatively scarce. In this work, we present the synthesis,...
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Dr DOUNIA FATIHI (University of Hassan II Casablanca)06/11/2025, 14:05
This work was conducted at the Ben M'Sik Faculty of Sciences, Engineering and Materials Laboratory (LIMAT) (Nanomaterials and Thin Films Team). This study is part of research efforts aimed at addressing global energy challenges. These challenges are caused in particular by rapid population growth, increased urbanization, and exponential energy demand. Faced with the progressive depletion of...
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YOUNES ELALAOUI (Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, B.P.7955, Morocco)06/11/2025, 14:20
Perovskite oxides with the general formula ABO₃ offer highly tunable physical properties through substitution at the A and B lattice sites. In this work, manganese (Mn) was introduced into BaSnO₃ to evaluate its impact on structural, electronic, and optical properties. First-principles calculations were performed using density functional theory (DFT) within the pseudopotential plane-wave...
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Prof. Yaroslav Sharlovych (Institute of Physics of NAS of Ukraine)07/11/2025, 09:00
The increasing availability, ease of deployment, and simple masking of optical surveillance systems persistently raise the challenge of detecting such systems. This study explores the potential of active detection based on the retroreflection (cat-eye) effect, even under challenging illumination conditions such as bright daylight.
The proposed method relies on active laser retroreflection,...
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Dr Andrii Lopatynskyi (V. Lashkaryov Institute of Semiconductor Physics of NAS of Ukraine)07/11/2025, 09:15
The global challenge of rising terrorism has been further complicated by the war in Ukraine, which has led to extensive contamination of soil and water resources with explosives and their byproducts. This situation underscores the urgent need to develop a sensitive, rapid, low-cost, portable, and easily mass-produced sensor for explosive detection.
A promising approach for detecting various...
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Artem Sachko (Ukrainian Physics and Mathematics Lyceum of Taras Shevchenko National University of Kyiv)07/11/2025, 09:30
Laser speckle, a phenomenon resulting from the scattering of coherent light from a rough surface, is rich with information encoding the surface's micro-topography. This work presents a novel optical methodology that decodes this information for quantitative, non-contact surface texture analysis from a single, static speckle. Our approach bypasses the temporal and mechanical constraints of...
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Ivan Budzuliak (Vasyl Stefanyk Carpathian National University)07/11/2025, 09:45
The influence of laser irradiation on the electrochemical properties of porous carbon material (PCM) doped with Er and Cr, as an electrode material of supercapacitors, was established from the analysis of impedance spectroscopy data. It has been experimentally shown that the specific capacitance of supercapacitors with electrodes of PCM doped with Er and Cr, increases by 40% and 60%,...
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Dr Lyudmyla Borkovska (V. Lashkaryov Institute of Semiconductor Physics of NAS of Ukraine)07/11/2025, 10:00
Laser Doppler Vibrometry (LDV) is a modern technology for measuring mechanical vibrations of different amplitudes with high precision and without physical contact. It finds wide applications in industry, engineering, scientific research, biology, and medicine. The remote nature of LDV operation allows measurement of vibrations in hard-to-reach or hazardous locations. Specifically, it can be...
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Ms Kenza Bahassan (PhD Student)07/11/2025, 10:30
Lead-free ferroelectric materials with a tetragonal tungsten bronze (TTB) structure have attracted increasing attention due to their multifunctional potential in microelectronics and energy applications. In this study, Ba(2–x)Sr(x)GdFeNb₄O₁₅ (x = 0, 1, 2) ceramics were synthesized via the solid-state reaction route to investigate the influence of Sr substitution on structural and dielectric...
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Dr Kateryna Terebilenko (Taras Shevchenko National University of Kyiv)07/11/2025, 10:45
The study focuses on the synthesis and characterization of phosphate and borate glass systems modified with transition metal oxides such as molybdenum and tungsten. The incorporation of these oxides was found to influence the short- and medium-range structure of the glass network, leading to changes in coordination states and connectivity of structural units. Subsequent doping with europium...
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Hanna Kochubei (.Lashkaryov Institute of Semiconductor Physics NAS Ukraine, Kyiv, Ukraine)07/11/2025, 11:00
Structural studies of As-S-Se glasses
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Kochubei H.$^{1}$, Stronski A.$^{1}$, Kostyukevich S.$^{1}$, Balayeva N.$^{2}$, Popovych M. $^{1}$, Dzhagan V.$^{1}$, Zahn D.R.T.$^{2}$
$^{1}$ V.Lashkaryov Institute of Semiconductor Physics NAS Ukraine, Kyiv, Ukraine
$^{2}$ Semiconductor Physics and MAIN, Chemnitz University of Technology, Chemnitz, Germany
kochubei.hanna@gmail.com
The mid-IR... -
Mr Dmytro Khomenkov (Mykola Gogol Nizhyn State University)07/11/2025, 11:15
The optical and structural properties of Si-doped HfO₂ thin films were systematically investigated as a function of deposition conditions and post-deposition annealing. The films were deposited by RF magnetron sputtering of a composite Si:HfO₂ target in pure Ar or Ar–H₂ plasma. Structural, optical, and luminescent characteristics were examined using spectroscopic ellipsometry,...
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Prof. Oleksandr Melnichuk (Nizhyn Mykola Gogol State University)07/11/2025, 11:30Poster
The report presents the results of studies on surface phonon and plasmon-phonon polaritons in undoped and manganese-doped ZnO ceramics for E c the orientation.
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The authors obtained mathematical expressions for calculating the reflectance coefficient in the Attenuated Total Reflectance (ATR) spectra for undoped and manganese-doped ZnO ceramics in the frequency range of surface polariton... -
Iryna Doroshenko (Taras Shevchenko National University of Kyiv)07/11/2025, 11:35Poster
Fluorescence quenching experiments were performed for aqueous BSA solutions at fixed protein concentration (2 μM) and varying ibuprofen concentrations in the range of 0–1.5 μM at three different temperatures (293, 303, and 313 K). Similar experiments were performed for aqueous solutions of BSA and ibuprofen with addition of Ar nanoparticles at fixed concentrations of ibuprofen and BSA and...
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Oleksandr Navozenko (Department of Experimental Physics, Faculty of Physics, Taras Shevchenko National University of Kyiv, Akademika Glushkova Av. 4, 03127, Kyiv, Ukraine.)07/11/2025, 11:40Poster
The development of organic light-emitting diodes (OLEDs) towards higher efficiency and lifetime depends on creating new efficient organic molecules which can be evaporated using thermal vacuum deposition method.
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Here we present the studies of the electronic structure of new luminescent difluoroborate complexes of benz[c,d]indole derivatives. The one-component and composite Alq3-dyes thin... -
Oksana Strilchuk (V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 45 Nauky Ave., Kyiv 03028, Ukraine)07/11/2025, 11:45Poster
We studied the influence of γ-irradiation on light-emitting characteristics (including intensity, peak position and half-width of photoluminescence bands) of the arrays of capped $In_x$$Ga_{1-x}$As/GaAs QDs (x = 0.4) grown on GaAs (100) substrates. To reveal the radiation resistance of QDs we analyzed the dose-dependent variation of photoluminescence spectra after the treatment...
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Mykola Melnichenko (Taras Shevchenko National University of Kyiv)07/11/2025, 11:50Poster
Polytetrafluoroethylene (PTFE) is a synthetic thermoplastic polymer that significantly outperforms other polymer materials in terms of its anti-friction properties. Despite its advantages, polytetrafluoroethylene also has a number of disadvantages, such as a high thermal expansion coefficient and low mechanical strength. One promising way to overcome these disadvantages is to introduce various...
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Vadym Shvernyk07/11/2025, 11:55Poster
The study of crack propagation in ceramics is critically important due to their widespread use in high-temperature and structural applications, where mechanical failure can lead to severe consequences. Silicon carbide (SiC) is particularly noteworthy because of its exceptional hardness and thermal stability; however, its brittleness necessitates a thorough understanding of fracture mechanisms....
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Lyudmyla Borkovska (V. Lashkaryov Institute of Semiconductor Physics of NASU)07/11/2025, 12:00Poster
Mn4+ activated oxides are highly stable, low cost and environmental safety materials that can be used as red phosphors in luminescence thermometry and phosphor-converted white light-emitting diodes. In MgAl2O4 spinel, the Mn4+ photoluminescence (PL) band with a peak at 651 nm is within human eye’s sensitivity spectral range, but its luminous efficacy needs to be increased. In this work, the...
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Valentyna Nosenko (V.Ye. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine)07/11/2025, 12:05Poster
Recently, biocompatible coatings for medical implants have become widely used. To improve their functionality and safety, it is necessary to understand the mechanisms of coating formation. In this study we present an analysis of the phase composition of biocompatible coatings produced from hydroxyapatite (HA) powder using the gas-detonation spraying technique. The coatings were deposited onto...
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Mr Danylo Morozov (Taras Shevchenko National University of Kyiv), Dr Vitalii Chornii (National University of Life and Environmental Sciences of Ukraine)07/11/2025, 12:10Poster
Cellulose is the most abundant natural polymer, with great potential to replace plastics in various human activities, including packaging, textiles, and electronics. The eco-friendliness, biodegradability, and low production costs are among the main advantages of the cellulose-based materials compared to common petroleum-based polymers. Recent studies indicated that cellulose and its...
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Mr Vasyl Cherevyshnyi (Taras Shevchenko National University of Kyiv), Dr Vitalii Chornii (National University of Life and Environmental Sciences of Ukraine)07/11/2025, 12:15Poster
Various oxide glasses and glass-ceramics have attracted significant attention as optical materials for applications in optoelectronics, such as displays, light-emitting diodes, temperature sensors, as well as active laser media. Some of glasses exhibit own photoluminescence (PL), but that emission is broadband, low intensity. Thus, it is therefore unsuitable for practical use. Doping with...
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Nazar Mazur07/11/2025, 12:20Poster
SERS, owning to it advantageous combination of ultra-sensitivity, high speed, low costs, multiplexing capability, and portability, may be a key method for explosives detection. The core of the SERS-based detection is the SERS-substrate – a specially designed nanostructured surface of noble metal, with a large number of “hot spots” – places nigh local concentration of electric field, generated...
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Danylo Kreiman (Taras Shevchenko National University of Kyiv)07/11/2025, 12:25Poster
Hybrid organic–inorganic lead-based perovskites have attracted significant attention from the scientific community over the past decade. These compounds have been successfully employed as active-layer materials in solar cells, light-emitting diodes, lasers, and photodetectors. The combination of their outstanding optical and electronic properties, together with the possibility of fabricating...
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Diana Hurova (B. Verkin Institute for Low Temperature Physics and Engineering of the NAS of Ukraine)07/11/2025, 12:30Poster
This work is devoted to the study of thermally reduced graphene oxide (TrGO) [1, 2] after exposure to high temperatures (500 °C and 700 °C). The structure and morphology of the obtained samples were investigated using X-ray diffraction and Raman spectroscopy methods.
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Analysis of the results shows that heating GO to high temperatures leads to a significant deformation of the carbon planes. As... -
Mariia Kasianchuk (Faculty of Physics of Taras Shevchenko National University of Kyiv)Poster
Photosensitive properties of heterostructures based on CuInGaSe$_2$ (CIGS) for solar cells were studied. Vertical structures $\mathrm{Mo}/\mathrm{CIGS}/\mathrm{CdS}$ with indium tin oxide (ITO) as a transparent top electrode were grown on glass substrates. Raman spectroscopy manifested modes typical for CIGS within $170$–$270~\mathrm{cm}^{-1}$. The photovoltage spectroscopy revealed CIGS as...
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Dr Alexei Nazarov (Lashkaryov Institute of Semiconductor Physics (ISP), NAS of Ukraine), Ms Maria Kasianchuk (Taras Shevchenko National University of Kyiv), Dr Oleksandr Datsenko (Taras Shevchenko National University of Kyiv), Prof. Serhii Kondratenko (Taras Shevchenko National University of Kyiv)Poster
Photosensitive properties of heterostructures based on CuInGaSe2 (CIGS) for solar cells were studied. Vertical structures Mo/CIGS/CdS with Indium Tin Oxide (ITO) as a transparent top electrode were grown on glass substrates. Raman spectroscopy manifested modes typical for CIGS within 170-270 cm–1. The photovoltage spectroscopy revealed CIGS as anode and CdS as cathode. The heterostructure was...
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