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The list of national projects SAS

Institute of Electrical Engineering SAS

Building a centre for advanced material application SAS

CEMEA - Vybudovanie centra pre využitie pokročilých materiálov SAV

Duration: 1.7.2019 - 30.6.2023
Program:
Project leader: Ing. Ťapajna Milan PhD.

Long-range proximity effect in superconductor / ferromagnet heterostructures

Dlhodosahový jav blízkosti v supravodič/feromagnet heteroštruktúrach

Duration: 1.7.2020 - 31.12.2023
Program: SRDA
Project leader: Ing. Chromik Štefan DrSc.

Electronic and optoelectronic devices based on ultra-wide bandgap Ga2O3 semiconductor

Elektronické a optoelektronické súčiastky na báze ultra-širokopásmového Ga2O3 polovodiča

Duration: 1.1.2021 - 31.12.2024
Program: VEGA
Project leader: Ing. Ťapajna Milan PhD.
Annotation:Recently, great research effort has been devoted to ultra-wide bandgap semiconductors for the preparation of high-performance electronic devices operating in the electric fields up to tens of kV and UV photodetectors. This project aims the research of the growth of epitaxial layers and electronic as well as optoelectronic devices based on Ga2O3. Based on preliminary results, we will investigate the growth of rhombohedral Ga2O3 with the highest bandgap energy. Epitaxial layers will be prepared by metal-organic chemical vapor deposition using liquid phase precursor injection. The layers will be used for preparation and research of electronic devices with a focus on Schottky diodes and switching MOSFET transistors. We will study the transport and thermal properties, parasitic effects and breakdown mechanisms of the developed electronic devices as well as electro-optical properties of p-n heterojunctions. We will also target exploratory research for improvements in thermal management of the power transistors.

Evolution of colour centres in diamond and their properties towards quantum detection

Formovanie farebných centier v diamante a ich vlastností smerom ku kvantovej detekcii

Duration: 1.7.2021 - 31.12.2024
Program: SRDA
Project leader: Ing. Varga Marian PhD.

Photonic Lab-on-a-Chip: investigation and development of plasmonic sensor platform for immediate detection of composites in solutions

Fotonické labortórium na čipe: výskum a vývoj platformy plazmonického senzora pre okamžitú detekciu zložiek v roztokoch

Duration: 1.7.2021 - 31.12.2024
Program: SRDA
Project leader: doc. Ing. Novák Jozef DrSc.

TMD/diamond heterostructures: Fabrication, characterization and applications

Heteroštruktúry TMD/diamant: Príprava, charakterizácia a aplikácia

Duration: 1.8.2020 - 31.7.2024
Program: MoRePro
Project leader: Ing. Varga Marian PhD.

Critical aspects of the growth for a new generation of III-N devices

Kritické aspekty rastu polovodičových štruktúr pre novú generáciu III-N súčiastok

Duration: 1.1.2022 - 31.12.2025
Program: VEGA
Project leader: Ing. Kuzmík Ján DrSc.
Annotation:Gallium Nitride (GaN) compounds are investigated for a new generation of high-frequency transistors, power electronics and post CMOS logic circuits. Flexibility in this area is given by a miscibility of In and Al with GaN, providing a wide spectra of semiconductors with a possibility of setting an energy band-gap from 0.65 eV to 6.2 eV, with countless combinations of heterostructures. Basis of our project is given by study and mastering of the growth of unique material concepts using a metal-organic chemical-vapour deposition (MOCVD) technique. We aim to investigate: i/ transistors with N-polar InN channel, ii/ MOS contacts on N-polar heterostructures, iii/ transistors with a hole conduction, as well as iv/ vertical structures on GaN substrate. Part of the project will be represented by characterisation activities, like investigation of the electron transport properties in N-polar InN, in MOS structures, study on the 2-dimensional hole gas as well as transient effect in C-doped vertical transistors.

Fabrication, physics and correlated states in metallic 2D transition metal dichalcogenides

Metalické 2D dichalkogenidy prechodných kovov: príprava, štúdium vlastností a korelované stavy

Duration: 1.7.2020 - 30.6.2023
Program: SRDA
Project leader: Dr. rer. nat. Hulman Martin
Annotation:The discovery of graphene in 2004 has brought a massive interest of scientists active in condensed-matter physics on research of 2D materials. Even though these materials have a long history starting already in the twenties of the 20th century, the past years have seen an intensive renascence of interest in 2D materials. Ultra-thin samples of many 2D materials have been successfully prepared with electronic properties that may exhibit correlated electronic phenomena such as charge density waves and superconductivity. One of the well-studied families of the 2D materials are transition metal dichalcogenides (TMDs). TMDs consist of hexagonal layers of metal atoms sandwiched between two layers of chalcogen atoms with a MX2 stoichiometry. In this project, we focus on those materials from the TMD family that exhibit strongly correlated electronic states: NbSe2, TiSe2, TaS2, TaSe2 and PtSe2. The goal of the project is to prepare ultrathin (≤ 10 nm) layers and bulk samples and characterise them thoroughly in terms of the thickness, crystallinity, homogeneity, optical and electronic properties. A special attention will be paid to charge density wave states and superconductivity in these materials and how they evolve with the sample thickness, doping, external electric and magnetic fields and details of the growth process. The scientific program also aims at preparing heterostructures built up of these materials as well as hybrid systems combining TMDs with other materials. This research also includes a detailed characterisation of heterostructures to provide a feedback to optimise the growth process.

Modern electronic devices based on ultrawide bandgap semiconducting Ga2O3 for future high-voltage applications

Moderné elektronické súčiastky na báze ultraširokopásmového polovodiča Ga2O3 pre budúce vysokonapäťové aplikácie

Duration: 1.7.2021 - 30.6.2025
Program: SRDA
Project leader: Ing. Gucmann Filip PhD.

Advanced GaAs-based nanomembrane heterostructures for highperformance RF devices

Moderné nanomembránové heteroštruktúry na báze GaAs pre vysoko produktívne vysokofrekvenčné prvky

Duration: 1.7.2022 - 30.6.2025
Program: SRDA
Project leader: RNDr. Gregušová Dagmar DrSc.
Annotation:The main aim of the proposed project is to expand the basic knowledge and to master the fabrication technology of the advanced nanomembrane AlGaAs/GaAs heterojunction devices for high-performance RF applications. Insufficient removal of the waste heat in electronic devices due to the Joule losses leading to overheating and early device failure often requires foreign, high thermal conductivity substrates to be employed. As opposed to the mainstream research of the GaN-based electronic devices prepared directly on sapphire or SiC, proposed GaAsbased devices will be fabricated upon self-supporting heterostructure nanomembranes transferred onto various substrates. It is very timely, original, and desirable approach to extend the utilization of the GaAs-based devices material potential, as demonstrated by our preliminary results.

Growth and Radiation Mechanisms in Diamond Hybrid Detectorsd Radiation Mechanisms in Diamond Hybrid Detectors

Modifikácia vlastností supravodivých, feromagnetických oxidových vrstiev a štruktúr pre modernú elektroniku

Duration: 1.7.2022 - 30.6.2025
Program: SRDA
Project leader: Mgr. Zaťko Bohumír PhD

Modification of properties of superconducting, ferromagnetic, oxide films and structures for advanced electronics

Modifikácia vlastností supravodivých, feromagnetických oxidových vrstiev a štruktúr pre modernú elektroniku

Duration: 1.1.2022 - 31.12.2025
Program: VEGA
Project leader: RNDr. Španková Marianna PhD
Annotation:We prepare and study oxide – ferromagnetic and dielectric perovskite thin films and micro- and nano structures as well as selected current superconducting films. YBa2Cu3Ox (YBCO) and La0.67Sr0.33MnO3 (LSMO) microstrips will be exposed different types of organic molecules to study their influence on the superconducting and ferromagnetic film properties. Following the results of the previous VEGA project, we will continue to study the superconductor S/ferromagnet F and S/F/S structures focusing on a creation of magnetic inhomogeneities with the aim to increase the triplet component of superconductivity and resolve the phenomenom of S/F thin films interaction (proximity effect). As part of the project, we will investigate the possibility of superconducting behavior of a two-dimensional MoS2 system deposited by pulsed laser deposition.

Nano-optical probes and sensors integrated on optical fiber

Nanooptické sondy a senzory integrované na optickom vlákne

Duration: 1.8.2021 - 31.12.2024
Program: SRDA
Project leader: doc. Ing. Novák Jozef DrSc.

Nanostructured thin-film materials characterized by weak binding interactions for electronic and sensoric applications

Nanoštrukturované tenkovrstvové materiály vyznačujúce sa slabými väzbovými interakciami pre elektronické a senzorické aplikácie

Duration: 1.7.2022 - 30.6.2026
Program: SRDA
Project leader: RNDr. Gregušová Dagmar DrSc.
Annotation:The proposed project is focused on the basic research of the preparation processes and properties of semiconducting sulfides of transition metals such as Mo, W and Ni and selected combinations with their oxides in the form of mixed sulfides and oxides, as well as the possibilities of their doping with noble metals (Pt, Au) for use in gas sensors as well as in supercapacitors. We also anticipate full utilization of semiconductor microelectronic and micromechanical techniques and micro / nanotechnologies, which can significantly contribute to qualitatively improved detection properties, low operating power consumption of gas sensors as well as increased energy efficiency and supercapacitor lifetime.

Low-loss superconducting CORC-like cable from REBCO conductors

Nízkostratový supravodivý kábel typu CORC z REBCO vodičov

Duration: 1.1.2021 - 31.12.2023
Program: VEGA
Project leader: Mgr. Seiler Eugen PhD
Annotation:Aim of the project is to elaborate the design of a superconducting CORC-like cable with considerably reduced AC losses. Project is focused on identification of the key parameters of the cable design, on the construction of model cables and their experimental characterisation. The research will follow two basic directions: optimisation of geometrical layout of the individual REBCO tapes in the cable and investigation of possible utilisation of low conductivity materials for the central core of the cable. Geometrical optimisation of the cable will be based on results of numerical simulations employing the Finite Element Method and the Minimum Electro-Magnetic Entropy Production method. In the experimental part, sets of short model cables will be manufactured for tests of different geometrical configurations and different materials for the central core. Investigated will be the total AC losses, basic transport parameters and degradation of superconducting tapes due to mechanical loading in the cabling process.

New technology for the preparation of sensors, detectors and memristors for intelligent microelectronics in the 21st century

Nová technológia prípravy senzorov, detektorov a memristorov pre inteligentnú mikroelektroniku v 21. storočí

Duration: 1.3.2022 - 30.9.2023
Program:
Project leader: RNDr. Cambel Vladimír DrSc.
Annotation:Project New fabrication technology of sensors, detectors and memristors for intelligent microelectronics in the 21st century features new approach to fabrication technology of these microelectronic devices. The goal is to study fabrication of sensors, detectors and memristors using new inovative controlled local ALD growth technology of gate, isolation and passivation oxide films using the atomic layer deposition (ALD) method.

Optimization of round high-temperature supercnoducting cable for pulse magnetic field

Optimalizácia okrúhleho kábla z vysokoteplotného supravodiča pre pulzné magnetické polia

Duration: 1.7.2021 - 30.6.2025
Program: SRDA
Project leader: doc. Ing. Gömöry Fedor DrSc.
Annotation:The project is focused on an optimization of a cable made of high temperature superconducting tapes wound on a core in form of a tube with the possibility of cooling the cable by the coolant flowing through the former. The purpose of the optimization is a significant decrease of AC losses, which can be achieved through three modifications of the cable. The first one is to reduce the width of the 4 mm superconducting tape down to 1 mm with steps smaller than 0.2 mm. The tuning of the tape width should allow to prepare the cables with optimal packing of the cable layers and with greater flexibility. The second modification is an additional narrowing of the superconductor width by striation scribing the superconducting layer along the tape with already optimized width. Both processes require a development of a suitable method for the cutting and scribing process of the superconducting tapes with minimal impact on their mechanical, structural and electrical properties. The third modification is the innovation of the central former, which should fulfill requirement of significantly reduced electrical conductivity. Modified superconducting tapes and cables prepared from them will be characterized in terms of mechanical and electromagnetic properties. Most of the experiments will be supported by computer modeling.

p-GaN electronics for energy savings and beyond-CMOS circuits

p-GaN elektronika pre úsporu energie a post-CMOS obvody

Duration: 1.7.2022 - 30.6.2025
Program: SRDA
Project leader: Ing. Kuzmík Ján DrSc.
Annotation:III-N semiconductors are probably the most versatile and promising semiconductor family, consisted of artificial compounds made of GaN, AlN and InN. In the project proposal we describe new technological concepts with sufficient freedom to solve main problems of the III-N post-beyond CMOS age: in transistors co-existence of the parasitic n-channel along with the p-channel, as well as low hole gas density and mobility. Similarly, we aim to demonstrate scalable threshold voltage in the enhancement-mode p-doped power transistors, which are needed by the industry for efficient, energy-saving convertors. In these aspects, our laboratories already showed very promising results proving the competence to reach described targets. If successfully implemented, results of our proposed project would represent a significant step forward not only from the world-wide point of view but is also in full agreement with the RIS3 SK (perspective areas of specialization of the Slovak economy), particularly in the field of semiconductors for electric cars of automotive industry, as well as in information and communication sciences.

Perspective ionizing radiation detectors for the uncovered neutron energy window

Perspektívne detektory ionizujúceho žiarenia pre nepokryté energetické okno neutrónov

Duration: 1.7.2023 - 30.6.2027
Program: SRDA
Project leader: Mgr. Zaťko Bohumír PhD
Annotation:The subject of the presented project is the optimization and preparation of semiconductor detection structures based on 4H-SiC and polycrystalline diamond suitable for neutron detection. As part of the project, single detectors will be prepared and investigated, especially for neutron energies from 100 keV to several MeVs. There are currently few sensitive detectors in this area of neutron energy. The advantages of SiC and polycrystalline diamond are the high radiation and temperature resistance of structures. The high spectrometric capability of SiC detectors is also important, especially when detecting neutrons with energies below 1 MeV. Polycrystalline diamond is m ore affordable than SiC, and our first preliminary results show its promising detection properties, especially when detecting ionizing particles. Another advantage of both types of semiconductors is the low sensitivity to gamma radiation, which is almost always present in the event that neutrons are formed during a nuclear reaction. This gamma ray enhances the background and impairs the sensitivity of the detectors currently in use. Pixel sensors for the Timepix/Medipix reading chip will also be developed and investigated. Prototypes of the radiation camera will be tested and calibrated using a monoenergetic neutron source.

Perspective semiconductor detector for nuclear physics

Perspektívne polovodičové detektory pre využitie v jadrovej fyzike

Duration: 1.3.2022 - 31.12.2024
Program: SRDA
Project leader: Mgr. Zaťko Bohumír PhD

Preparation and properties of superconducting and magnetic oxide films for modern electronic applications

Príprava a vlastnosti supravodivých a magnetických oxidových vrstiev pre moderné elektronické aplikácie

Duration: 1.1.2023 - 31.12.2024
Program:
Project leader: Ing. Chromik Štefan DrSc.

Fabrication, characterization, and doping of ultra-thin layers of transition metal dichalcogenides

Príprava, charakterizácia a dopovanie ultratenkých vrstiev dichalkogenidov prechodných kovov

Duration: 1.1.2021 - 31.12.2024
Program: VEGA
Project leader: Mgr. Sojková Michaela PhD.
Annotation:Thanks to the unusual physical properties, 2D materials have been intensively studied for several years. An interesting group of this class of materials is transition metal dichalcogenides TMD. They have a hexagonal structure with the individual layers bonded to each other only by weak Van der Waals bonds. This causes significantly anisotropic properties and has a significant effect on their electronic structure. Some of them show physically interesting correlated states (superconductivity, charge density waves). The primary goal of this project is to prepare and study the properties of thin layers of 2 different TMD - MoS2 and PtSe2, and to study the influence of doping with Li and Na cations on the electrical and structural properties of these layers. The secondary goal is to optimize growth and doping conditions to improve the parameters of thin films, such as electrical conductivity and charge carrier mobility which will enable the preparation of functional electronic components - transistors.

Radiation harder sensor for X-ray imaging of higher quality

Radiačne odolnejší senzor pre RTG zobrazovanie vyššej kvality

Duration: 1.7.2019 - 30.6.2023
Program: SRDA
Project leader: Mgr. Zaťko Bohumír PhD

Growth and optical characterization of 2D materials: MoTe2, WTe2, PtTe2

Rast a optická charakterizácia 2D materiálov: MoTe2, WTe2, PtTe2

Duration: 1.1.2023 - 31.12.2025
Program: VEGA
Project leader: RNDr. Pribusová Slušná Lenka PhD.
Annotation:Research of thin-film materials noticed a significant increase, especially since the discovery of graphene, when a wide range of 2D materials began to study. A significant group of 2D materials is transition metal dichalcogenides (TMDs), including MoTe2, WTe2, and PtTe2. These materials have unique optoelectronic properties that vary due to the thickness of the layer and the crystal structure. Electrical properties vary depending on structures, from semiconducting to metallic. The preparation of films by tellurization of molybdenum, tungsten, and platinum is more difficult than sulfurization or selenization due to the weaker redox properties of tellurium. The challenge in thin films is the controlled preparation of the required crystal structure of homogenous large-area layers. This project aims to contribute to the solution of preparing these materials, characterize their structure and orientation of the films concerning the substrate, and determine the optical parameters and electrical properties.

Robust spin waves for future magnonic applications

Robustné spinové vlny pre budúce magnonické aplikácie

Duration: 1.7.2020 - 30.6.2023
Program: SRDA
Project leader: Dr. Mruczkiewicz Michal
Annotation:In this project we will focus on the theoretical and experimental investigation of spin wave dynamics at nanoscale. Spin wave is considered as candidate for an information carrier in ultrafast and energy efficient information processing devices. It is due the unique properties of spin waves, namely low heat dissipation, possible manipulation at nanoscale or reconfigurability. We are going to investigate specific spin wave systems, that can host robust, unidirectional and reprogrammable spin waves. Therefore, the results of this project will contribute to the field of modern magnetism, magnonics.

Superconducting joints of MgB2 wires for windings in persistent mode

Supravodivé spoje pre MgB2 vinutia v perzistentnom móde

Duration: 1.1.2022 - 31.12.2025
Program: VEGA
Project leader: Ing. Kováč Pavol DrSc.
Annotation:The idea of this project is to make and optimize superconducting joints between the composite MgB2 wires manufactured by powder-in-tube method „PIT“ and by the infiltration or diffusion of magnesium into boron process „IMD“ and use it for winding working in „persistent mode“. It will be done dominantly for superconducting joints of winding made by „wind and react“ technique, but joints for winding with already reacted MgB2 wires made by „react and wind“ process will be developed as well. The properties of manufactured superconducting MgB2 joints of different geometry and architecture will be subjected to mechanical and thermal treatments, which would reach the joint current around 50% of critical current measured for the reference MgB2 wire at external field 5 T.

Scholarships for excellent researchers threatened by the war conflict in Ukraine

Štipendiá pre excelentných výskumníkov ohrozených vojnovým konfliktom na Ukrajine

Duration: 1.4.2022 - 31.3.2025
Program: Other projects
Project leader: RNDr. Kalmykova Tetiana PhD.

Study of magnetic vortex dynamics for device applications

Štúdium dynamiky magnetického víru pre využitie v súčiastkach

Duration: 1.1.2022 - 31.12.2024
Program: VEGA
Project leader: Ing. Šoltýs Ján PhD
Annotation:In this project, we will focus on the theoretical and experimental investigation of magnetic vortices. The idea is to use them as a candidate for an information carrier in ultrafast and energy-efficient devices. The key idea of such memory is to use the two vortex core polarities as a magnetic bit that can be easily read and written via the dynamical reversal. We will search for the optimal shape of a magnetic 3D pattern with polarity easily controlled by a small in-plane magnetic field. In the second part of the project, we will design and prepare a system of ordered magnetic nanoelements in the vortex state set by an in-plane magnetic field. Such ordered nanoelements can be considered as a single unit cell of the magnonic crystal. They can be also periodically arranged into a finite 2D array of interacting magnetic objects to observe the unidirectional spin waves. Therefore, our investigation will be an important step towards the first experimental demonstration of topological magnons.

Thermal stabilization of high-temperature superconducting tapes for fault current limiters

Tepelná stabilizácia vysokoteplotných supravodivých pások pre použitie v obmedzovačoch skratových prúdov

Duration: 1.1.2021 - 31.12.2024
Program: VEGA
Project leader: doc. Ing. Gömöry Fedor DrSc.
Annotation:Additional thermal stabilization is necessary for commercially available high-temperature superconducting tapes, in order to use the tapes in devices for fault current limiting in high-voltage grids. The proposed project is aimed at fabrication of thermally stabilizing composite coating (epoxy resin with ceramic filler), which will act as a sink and absorber of the heat produced in a limiting event. Various materials for thermal stabilization will be tested, with regard to their thermal, physical, and mechanical properties, and their resistance against thermal shocks. Possibilities for improvement of mechanical properties will be investigated by additional reinforcement of the thermal stabilization. The effectivity of the thermal stabilization will be determined for superconducting tapes from various producers, by experimental limiting of fault current. Experiments will be complemented with numerical modelling.

Topologically nontrivial magnetic and superconducting nanostructures

Topologicky netriviálne magnetické a supravodivé nanoštruktúry

Duration: 1.7.2021 - 31.12.2024
Program: SRDA
Project leader: Ing. Šoltýs Ján PhD

Transport of magnetic skyrmions in antidot lattices: Effect of temperature and combination of transport mechanisms

Transport magnetických skyrmiónov v antidot mriežkach: Efekt teploty a kombinácie rôznych transportných mechanizmov

Duration: 1.1.2021 - 31.12.2023
Program: VEGA
Project leader: Mgr. Feilhauer Juraj PhD.

Transistors based on 2D Metal Chalcogenides Grown via Thermally Assisted Conversion

Tranzistory na báze 2D kovových chalkogenidov pripravených teplom podporovanou konverziou

Duration: 1.7.2022 - 30.6.2026
Program: SRDA
Project leader: Ing. Ťapajna Milan PhD.
Annotation:2D materials can form one-atom-thick sheets with extraordinary properties. One of the most promising classes of 2D materials is the transition metal dichalcogenides (TMDs). The transition from an indirect to a direct bandgap, when the bulk materials is thinned down to a monolayer, results in unique electrical and optical properties of 2D TMDs. Post-transition metal chalcogenides (PTMCs) represents another interesting group of 2D materials. These materials have wide band gap and, depending on the structure of the material, show anisotropic electrical and optical properties. The aim of this project is the fabrication of field-effect transistors with metal-oxide-semiconductor gate (MOSFETs) based on selected TMDs and PTMCs compounds and detail analysis of their transport properties. We will focus on large-area few-layer PtSe2 and GaS/GaSe films grown by thermal assisted conversion, i.e. sulfurization and selenization. Based on the existing experiences, structural, chemical and electrical properties of horizontally-aligned PtSe2 films prepared by selenization will be optimized, targeting mobilities similar to those prepared by mechanical exfoliation. Then, MOSFET technology using both, top-gate as well as bottom-gate approach will be developed and optimized. Atomic layer deposition and metal-oxide chemical vapor deposition (MOCVD) will be employed for gate oxide growth. GaS/GaSe few-layer films will be prepared by chalcogenization

Ultra-thin conformal surface coatings of complex-morphology structures for improving battery performance using atomic layer deposition

Ultratenké homogénne povrchové vrstvy na štruktúrach komplexnej morfológie pre vylepšenie výkonu batérii využitím depozície po atómových vrstvách

Duration: 1.1.2022 - 31.12.2025
Program: VEGA
Project leader: Ing. Hudec Boris PhD.
Annotation:Project is focused on the development and optimization of method of 3D deposition of conformal ultra-thin coatings using ALD (atomic layer deposition) on structures of complex morphology, such as micro-porous layers and powders. The method will subsequently be applied in preparation of new generation Li-based batteries, by passivation and modification of micro-porous surfaces of cathode layers. Effect of ultra-thin ALD coatings conformality at the nano-scale will be systematically evaluated by correlation of electron microscopy analyses with electrochemical measurements of prepared batteries. Next step will be the modification of surfaces of discrete metal and ceramic micro-particles and powders with the aim of their subsequent application in fabrication of novel ceramic and metal materials and also new materials for experimental battery electrodes.

Thermal transport properties of perspective future semiconductor materials and interfaces

Vlastnosti tepelného transportu v budúcich perspektívnych polovodičových materiáloch a rozhraniach

Duration: 1.1.2022 - 31.12.2023
Program: SRDA
Project leader: Ing. Gucmann Filip PhD.

Contact engineering for advanced materials and devices

Výskum a vývoj kontaktov pre nové materiály a súčiastky

Duration: 1.1.2021 - 31.12.2024
Program: VEGA
Project leader: RNDr. Gregušová Dagmar DrSc.
Annotation:Intensive research has so far been done into metallic contacts to semiconductors. However, new types of conductivity, materials and devices, and new contact formation mechanisms require new insights into the formation of such contacts. Our aim is to determine the processes and physics behind metallization schemes for normally-off InAlN-based heterostructure high electron mobility transistors with hole conductivity. InAlN with a high molar fraction of InN will be doped with Mg, and the ohmic and Schottky metallic stacks will be optimized. New transition metal dichalkogenide materials (TMDCs) are very promising for new device applications. However, metallization schemes for TMDCs are very challenging. TMDCs exhibit varying band gap widths in dependence of their thickness. Our aim is to study metallization schemes for TMDCs, their topology, and explain differences between ex-foliated and grown samples, and differences between back-gated and top-gated devices in correlation with basic TMDCs properties.

Research and development of advanced for defiction of gases and biomolecules

Výskum a vývoj pokročilého QCM-FET duálneho senzora reaktivovaného na báze diamantových vrstiev pre detekciu plynov a biomolekúl

Duration: 1.1.2023 - 31.12.2024
Program: Other projects
Project leader: Ing. Izsák Tibor PhD.

Radiation resistant semiconductor sensors for utilization in harsh environment

Vysokoodolné polovodičové senzory ionizujúceho žiarenia pre využitie v radiačnom prostredí

Duration: 1.1.2020 - 31.12.2023
Program: VEGA
Project leader: Mgr. Zaťko Bohumír PhD
Annotation:Recently, detectors of ionizing radiation are important part of many fields of science and research. The object of proposal is research of various semiconductor detector structures based on Si, GaAs, 4H-SiC and CdTe as a detector of ionizing radiation where 4H-SiC is wide bandgap semiconductor which is radiation resistant material suitable for long term work in harsh environment. This includes optimization of prepared sensor in term of utilization and also what type of radiation will be detected. Also passivation and encapsulation is important in long term word of prepared sensors. The contribution will be also in the simulation due to optimization of size and thickness of sensor contacts and passivation. The prepared structures will be characterized by electrical (curren-voltage and capacitance-voltage measurements) and spectrometric measurements using standartly used radioisotope sources. Also radiation hardness of samples will be tested (increased temperature, ionizing environment).

High temperature superconducting coils in motors for electric and hybrid aircrafts

Vysokoteplotná supravodivá cievka pre motory elektrických a hybridných lietadiel

Duration: 1.7.2020 - 30.6.2023
Program: SRDA
Project leader: Mgr. Pardo Enric PhD.
Annotation:Full superconducting electric motors are very promising to provide the required power density to enable commercial hybrid and electric airplanes. These can reduce emissions by 75 % in CO2 and 90 % in NOx, following the ACARE Flightpath 2050 targets of the European Union. Superconducting motors can also be applied to cleaner sea or sweet water transport. In spite of the extensive research in the area, the electro-magnetic and electro- thermal properties of superconducting coils in the motor magnetic environment remain largely unknown, partially because of the lack of measurements of the relevant temperatures (between 20-40 K) and modeling methods for full superconducting motors. The aim of this project is to gain this understanding and develop numerical modeling methods to enable the design of future superconducting motors. These methods will be compared to experiments in the relevant temperature range for motor applications.

High-performance curved X-ray optics prepared by advanced nanomachining technology

Vysokovýkonná zakrivená röntgenová optika pripravená pokročilou technológiou nanoobrábania

Duration: 1.1.2021 - 31.12.2023
Program: VEGA
Project leader: Ing. Zápražný Zdenko PhD.
Annotation:The project is focused on the research and development of new types of X-ray optics with highly accurate curved active surfaces. The surfaces will be prepared by an innovative nanomachining technology. We will investigate the application of nanomachining technology to a special case of X-ray optics with curved surfaces, which is a parabolic refractive lens operating in the transmission geometry. The second special case we will focus on will be thin crystal monochromators with different thicknesses in a range of 20-2000 micrometers. Such elements can be used for example as beam splitters in modern X-ray free-electron lasers (XFEL), bent crystals in Johansson monochromators for spectroscopic applications, or they can also be used in particle accelerators for beam steering. The developed elements of curved X-ray optics will be tested in real X-ray metrology and X-ray imaging experiments using laboratory or synchrotron X-ray sources and highly sensitive directly converting X-ray detectors Pilatus and Medipix.

Development of silicon carbide and aluminum nitride interlayers for pn heterostructure based on gallium oxide and boron-doped nanodiamonds

Vývoj medzivrstiev karbidu kremíka a nitridu hliníka pre pn heteroštruktúry oxidu gália a bórom dopovaných nanodiamantov

Duration: 1.1.2023 - 31.12.2023
Program:
Project leader: MSc. Keshtar Javad

Energy Harvesting Device Based on Micropillar Structures

Zberač energie na báze mikrostĺpikovitých štruktúr

Duration: 1.1.2022 - 31.12.2023
Program: SRDA
Project leader: Ing. Vanko Gabriel PhD.

Improvement of crystal quality of β-Ga2O3 grown on SiC using LI-MOCVD method

Zlepšenie kryštalickej kvality β-Ga2O3 rasteného na SiC substrátoch pomocou LI-MOCVD metódy

Duration: 1.1.2023 - 31.12.2023
Program:
Project leader: Ing. Hrubišák Fedor

The total number of projects: 42