Electrical and Electronic Engineering, Electrochemistry, Multidisciplinary, Materials Science
140
Scopus Publications
1468
Scholar Citations
20
Scholar h-index
36
Scholar i10-index
Scopus Publications
Quantum-inspired optimization for current stress reduction in DAB converters for ultra-fast EV charging Suwaiba Mateen, Ahteshamul Haque, Mohammed Ali Khan, Thomas Ebel, Shabana Mehfuz Scientific Reports, 2026 Ultra-fast charging (UFC) of electric vehicles (EVs) pushes the limits of conventional power converter design, demanding breakthroughs in efficiency, thermal management, and reliability. Among the various converter options, the Dual Active Bridge (DAB) has emerged as a strong candidate for such high-power DC charging applications. In this paper, a new phase-shift modulation strategy for the DAB is proposed aimed at minimizing current stress, thereby enhancing overall efficiency and reliability, and lowering switching and conduction losses. Unlike the conventional single-phase shift (SPS) method, that employs a single delay angle, the proposed method utilizes two phase-shift delays, providing greater control over power flow and reducing current stress. To achieve optimal operation, Quantum-Inspired Optimization (QIO) is used to fine-tune the phase delays, ensuring efficient performance. Comparative analysis with SPS demonstrates that the novel method achieves Zero Voltage Switching (ZVS) for all switches, reduces current stress by up to 50%, and therefore, significantly enhances the converter reliability. Additionally, the simplicity of implementation improves feasibility and scalability for next-generation UFC infrastructure. Both simulation and experimental validations confirm the effectiveness of the proposed technique, establishing its suitability for high-power EV charging systems.
First-principles insights into WS2/4H-SiC heterostructure Geoffrey Tse, Chowdam Venkata Prasad, Sunil Kumar, Nilesh Kumar Jaiswal, Manish Taunk, Geon-Hee Lee, Jin-Woo Choi, Chang-Jun Park, Ye-jin Kim, S. Damodaraiah, Rajiv Kumar Pandey, Jong-Min Oh, Thomas Ebel, Sang-Mo Koo Next Materials, 2026 This work investigates the structural and electronic characteristics of the WS 2 /4H-SiC heterostructure through first-principles calculations using density functional theory (DFT). To obtain reliable bandgap values, the hybrid HSE06 functional along with norm-conserving pseudopotentials was employed. The computational setup included a plane-wave cutoff energy of 500 eV and a 5 × 5 × 1 Monkhorst-Pack k-point grid for Brillouin zone (BZ) integration. Full structural relaxation yielded lattice constants of a = b = 3.065 Å and c = 22.99 Å, with interaxial angles α = β = 90° and γ = 120°, confirming a stable layered hexagonal configuration. The electronic band structure displays an indirect gap of ∼40.2 meV, indicative of semi-metallic behavior. The projected density of states (PDOS) reveals the orbital hybridization between WS 2 and SiC, particularly near the Fermi level. Therefore, the WS 2 /4H-SiC interface demonstrates strong electronic interaction, making it a viable material platform for next-generation nanoelectronics and high-performance power devices. • DFT-HSE06 reveals stable WS 2 /4H-SiC heterostructure with hexagonal symmetry. • Semi-metallic behavior observed with a small indirect bandgap (∼40 meV). • Strong orbital hybridization enhances interlayer electronic interactions. • Favorable charge transport supports next-gen power and optoelectronics. • Promising platform for high breakdown voltage and thermal stability devices.
Self-healable capacitors with improved thermostability from stereocomplex PLA Neha Mulchandani, Bartosz Mikolaj Gackowski, Luciana Tavares, William Greenbank, Thomas Ebel, Anne Ladegaard Skov, Anders Egede Daugaard Green Chemistry, 2026 Sustainable, thermostable, self-healing capacitors developed using poly(lactic acid) (PLA) as a bio-based dielectric material.
Optimization-based Dynamic Life Cycle Assessment on Emission-based Demand Response Strategies in Danish Households Mohammad Hemmati, Navid Bayati, Kevin M. Banjar-Nahor, Amjad Anvari-Moghaddam, Thomas Ebel Smart Grids and Sustainable Energy, 2026 The residential sector accounts for a significant portion of global energy consumption and greenhouse gas emissions. Traditional static life-cycle assessment (LCA) methods often fail to capture the dynamic nature of emissions resulting from fluctuating energy production, particularly as energy mixes evolve with the integration of renewable sources. This paper addresses these limitations by proposing a dynamic life-cycle assessment (DLCA) framework integrated with demand response (DR) strategies for residential buildings in Denmark. The framework optimizes the daily operation of household appliances—including washing machines, refrigerators, lighting, electric vehicles, laptops, and ovens—considering the real-time emission factors derived from the Danish energy mix. Integrating OpenLCA with Pyomo software, the optimization model minimizes global warming potential (GWP) based on dynamic energy consumption patterns and emission factors. The proposed methodology leverages DR to shift appliance usage to off-peak times, aligning with periods of lower carbon intensity in the energy grid. The paper demonstrates how DLCA and DR reduce residential GHG emissions by optimizing energy consumption and load-shifting strategies. This approach provides a more accurate representation of residential carbon footprints than static assessments, proving its effectiveness in decarbonizing the residential sector. The key contributions include developing a software-in-the-loop framework to dynamically assess energy use and emissions, proposing an emission-responsive load control strategy, and quantifying the environmental benefits of integrating DR with a dynamic energy mix. Results effectively convey that a 20% shift in load demand leads to a 13.9% reduction in GWP, highlighting the significance of dynamic modeling in optimizing residential energy.
Stacked high voltage aluminum polymer capacitor without separator, realization and evaluation at 450V Jonas Wittmaack, Thomas Ebel Power Electronic Devices and Components, 2026 This work presents a high voltage polymer aluminum electrolytic capacitor design without a paper separator, realized with PEDOT:PSS as electrolyte and evaluated up to 450V. Comparative testing against a conventional separator-based prototype shows significant ESR benefits at high frequencies, while maintaining high volumetric efficiency. Experimental results showed an ESR reduction by a factor of 10 at 100kHz. The improved performance originates from the electronic conduction mechanism of PEDOT:PSS. Breakdown testing confirmed stable dielectric integrity, with only a 1.6% deviation from the reference design. These findings demonstrate that a separatorless PEDOT:PSS configuration can serve as a simplified approach for compact, high-frequency DC-link and filtering applications in next-generation power electronic systems. • The new separatorless design achieved stable operation up to 450V, comparable to conventional paper-separated capacitors. • Equivalent Series Resistance (ESR) is reduced by a factor of 10 at 100kHz, significantly improving high-frequency performance. • The breakdown voltage remained nearly unchanged (1.6% deviation), confirming dielectric integrity without a separator. • The separator thickness is reduced from 80 μ m (paper) to 20 μ m (PEDOT:PSS), enhancing volumetric e!ciency.
Design and Optimization of AlGaN/AlN/GaN L-SBD for Radiofrequency Applications Shaikshavali Dudekula, Nilesh Kumar Jaiswal, Thomas Ebel, Venkata Prasad Chowdam, Sang-Mo Koo, Kannadassan Dhanaraj ACS Omega, 2026 This work presents a comprehensive investigation of the radiofrequency (RF) performance of lateral Schottky barrier diodes (L-SBDs) using an AlGaN/AlN/GaN heterostructure. The study aims to enhance carrier confinement and improve RF figures of merit by introducing a thin AlN interlayer between the AlGaN barrier and the GaN channel. The influence of AlN interlayer thickness (1–3 nm) on two-dimensional electron gas (2DEG) properties, current transport, capacitance, and dynamic behavior are systematically analyzed. Simulations were calibrated against experimental data to validate key physical models, including trap-assisted Schottky barrier modulation and plasma-induced surface degradation. The inclusion of an optimized 3 nm AlN interlayer enhances polarization-induced charge at the AlN/GaN interface, thereby increasing carrier concentration and mobility while mitigating alloy scattering. As a result, the device achieves a forward current of 630 mA/mm (∼9% improvement), a cutoff frequency (fC) of 0.283 THz (∼14.11% increase), a dynamic conductance (Gd) of 310 mS/mm (∼10% enhancement), and a voltage sensitivity (βV) of 1180 mV/mW (∼90% improvement) compared to the conventional L-SBD. An equivalent small-signal model is also developed to extract critical parameters, including series resistance, junction capacitance, and curvature coefficient. These results confirm that integrating a thin AlN interlayer significantly enhances the RF efficiency and sensitivity of GaN-based L-SBDs, making them promising candidates for high-frequency detector and microwave mixer applications.
Design and Control of an Electrolytic Capacitorless Three-Phase On-Board Charger Based on Active Third-Harmonic Current Injection Chandrima Chatterjee, Soumya Shubhra Nag, Thomas Ebel IEEE Transactions on Power Electronics, 2026 On-board chargers (OBCs) with conventional two-stage architecture, consisting of an active front-end (AFE) converter and an isolated dc-dc stage, require bulky line filters and dc-link capacitors, resulting in low volumetric efficiency. Active third-harmonic injection and current unfolding methods offer significant improvement in terms of efficiency and power density in power factor correction (PFC) applications. However, existing unfolding-based topologies require two isolated dc-dc converters capable of handling the rated power for PFC and output voltage regulation. This article presents a three-phase ac-dc converter with a third-harmonic current injection circuit that processes a fraction of the total power and a single isolated dc-dc converter for galvanic isolation. Line frequency switching in the rectifier produces varying dc-link voltages, eliminating the requirement of bulky electrolytic capacitors. The article discusses detailed operation and design procedures along with an elaborate comparative analysis between the proposed topology and the conventional two-stage and Swiss rectifier-based isolated topologies. A 6.6 kW prototype is developed and tested for experimental validation of the system in both balanced and unbalanced grid conditions. The experimental results demonstrate unity power factor (upf) operation throughout the operating range, achieving a peak efficiency above 97%.
Interface engineering of 4H-SiC-based UV photodetectors: A comprehensive review Chowdam Venkata Prasad, Peyala Dharmaiah, Geon-Hee Lee, Se-Rim Park, Ji-Hyun Kim, Seung-Hyun Park, Hyeon-Do Kang, Minseok Kim, Jin-Woo Choi, Ye-Jin Kim, Chang-Jun Park, Geoffrey Tse, Hea Jung Park, Weon Ho Shin, Nilesh Kumar Jaiswal, Yogendra Kumar Mishra, Thomas Ebel, Jong-Min Oh, Sang-Mo Koo Materials Today Advances, 2025 Ultraviolet (UV) photodetectors based on wide-bandgap semiconductors are essential for next-generation sensing technologies operating in harsh and energy-limited environments. Because of its wide bandgap (3.26 eV), high thermal conductivity, and radiation tolerance, 4H-silicon carbide (4H-SiC) provides an ideal material foundation for realizing self-powered and deep-UV detection . However, the performance of these devices is often constrained by intrinsic defects, interface states, and recombination losses that limit charge transport and long-term stability, underscoring the urgent need for interface-driven design strategies. This review provides a comprehensive, mechanism-based overview of recent progress in self-powered 4H-SiC UV photodetectors, emphasizing interface engineering through heterostructure design, dielectric integration, and incorporation of carbon-based and 2D materials enables enhanced carrier separation, spectral selectivity, and device reliability. This work uniquely establishes quantitative correlations between interface properties and device figures of merit , highlights emerging architecture such as avalanche and phototransistor configurations , and discusses their scalability and integration prospects for autonomous UV sensing systems. By bridging material science, device physics, and system-level functionality, this review defines a unified framework for achieving high-efficiency, self-powered, and environmentally resilient 4H-SiC photodetectors, guiding future research toward scalable and intelligent UV detection technologies.
Multiphysics modeling of electrolyzers under dynamic converter operation Mohammed Ali Khan, Morten Rahr Nielsen, Mohammad Sadegh Golsorkhi, Thomas Ebel, Stig Munk-Nielsen International Journal of Hydrogen Energy, 2025 The integration of electrolyzers into modern power systems is a critical step toward sustainable hydrogen production. However, their dynamic power consumption and stringent operational constraints present considerable challenges. This article proposes a comprehensive multiphysics model of an alkaline electrolyzer, emphasizing its interaction with a power electronic converter to ensure efficient and reliable power delivery. The study incorporates electrochemical principles to develop mathematical models that accurately represent the alkaline electrolyzer’s electrical behavior and dynamic response. A single-stage active front-end (AFE) rectifier based on SiC MOSFETs is employed as the power electronic interface, offering improved energy efficiency, enhanced system stability, and reduced power quality issues compared to conventional approaches. Experimental results validate the performance of the proposed alkaline electrolyzer and converter models, highlighting the potential for effective integration of alkaline electrolyzers into converter-based systems within renewable energy environments. • Development of a dynamic multiphysics model for alkaline electrolyzer operation. • Integrated thermal, electrical, and pressure layers into one unified model. • Modeling of dynamic interaction between converter and electrolyzer using a SiC-based AFE rectifier. • Validated model accuracy through comparison with experimental test data on alkaline electrolyzer. • Simulated dynamic controller response under various loading conditions.
Intelligent Inductor Characterization for Power Converters Mohammed Ali Khan, Ramkrishan Maheshwari, Kasper Mayntz Paasch, Thomas Ebel Proceedings of the International Conference on Power Electronics Drives and Energy Systems for Industrial Growth Pedes, 2024
Evaluation of Solar and Lunar Eclipse Impacts on Danish Power System as a Case Study Hamed Kheirandish Gharehbagh, Sajjad Miralizadeh Jalalat, Navid Bayati, Thomas Ebel Proceedings 2023 IEEE International Conference on Environment and Electrical Engineering and 2023 IEEE Industrial and Commercial Power Systems Europe Eeeic I and Cps Europe 2023, 2023
A Complete PFC Inductor Design for Lighting Equipment Applications 24th European Conference on Power Electronics and Applications EPE 2022 Ecce Europe, 2022
Optimal gapped boost in inductor design for power factor correction applications 2021 23rd European Conference on Power Electronics and Applications EPE 2021 Ecce Europe, 2021
Active Damping by State Feedback Control in Induction Motor Drive with Filter 2021 23rd European Conference on Power Electronics and Applications EPE 2021 Ecce Europe, 2021
Winding loss optimization for boost inductor design Wai Keung Mo, Kasper M. Paasch, Thomas Ebel, Henrik Andersen Proceedings 2019 IEEE 13th International Conference on Compatibility Power Electronics and Power Engineering Cpe Powereng 2019, 2019
Integration concept for a traction inverter with 3D-Printed embedded cooling technology realizing highest power density Cips 2018 10th International Conference on Integrated Power Electronics Systems, 2018
Highly integrated traction inverter for a modular drive concept Pcim Europe Conference Proceedings, 2018
First-principles insights into WS2/4H-SiC heterostructure G Tse, CV Prasad, S Kumar, NK Jaiswal, M Taunk, GH Lee, JW Choi, ... Next Materials 12, 102057 , 2026 2026
Optimization-based Dynamic Life Cycle Assessment on Emission-based Demand Response Strategies in Danish Households M Hemmati, N Bayati, KM Banjar-Nahor, A Anvari-Moghaddam, T Ebel Smart Grids and Sustainable Energy 11 (1), 17 , 2026 2026 Citations: 1
Second-life potential of end-of-life E-ferry cells for stationary BESS K Qian, J Diers, H Beiranvand, HH Mikkelsen, KM Paasch, T Ebel, ... Academia Green Energy 3 (1) , 2026 2026
Step-Voltage Anodization with Intermediate Hydrations for Enhancing the Breakdown Voltage of Aluminum Solid Polymer Capacitors with Forming Voltages over 1000 V T Kruse, D Quintero, L Tavares, T Ebel, H Habazaki ACS Applied Engineering Materials 4 (3), 1464-1472 , 2026 2026
Stacked high voltage aluminum polymer capacitor without separator, realization and evaluation at 450V J Wittmaack, T Ebel Power Electronic Devices and Components, 100139 , 2026 2026
Quantum-inspired optimization for current stress reduction in DAB converters for ultra-fast EV charging S Mateen, A Haque, MA Khan, T Ebel, S Mehfuz Scientific Reports , 2026 2026
Engineering heterostructures for electrocatalysis and energy storage: classification, design, computational insights and property modulation T Magray, Y Arif, M Thombare, T Ebel, DS Dhawale, P Sarawade Coordination Chemistry Reviews 549, 217341 , 2026 2026 Citations: 14
Design and Control of an Electrolytic Capacitorless Three-Phase On-Board Charger Based on Active Third-Harmonic Current Injection C Chatterjee, SS Nag, T Ebel IEEE Transactions on Power Electronics , 2026 2026
Design and Optimization of AlGaN/AlN/GaN L-SBD for Radiofrequency Applications S Dudekula, NK Jaiswal, T Ebel, VP Chowdam, SM Koo, K Dhanaraj ACS omega , 2026 2026
Self-healable capacitors with improved thermostability from stereocomplex PLA N Mulchandani, BM Gackowski, L Tavares, W Greenbank, T Ebel, ... Green Chemistry , 2026 2026
Polyolefin-Based Cross-Linked Networks for Self-Healing and Thermostable Capacitors: ACS Applied Engineering Materials N Mulchandani, BM Gackowski, W Greenbank, T Ebel, AL Skov, ... Acs Applied Engineering Materials , 2026 2026
Hybrid Voltage and Current Control Method for Harmonic Mitigation of Single-Phase AC Loads in DC Microgrids M Baharizadeh, MS Golsorkhi, N Keshavarzi, T Ebel arXiv preprint arXiv:2512.24170 , 2025 2025
Polyolefin-Based Cross-Linked Networks for Self-Healing and Thermostable Capacitors N Mulchandani, BM Gackowski, W Greenbank, T Ebel, AL Skov, ... ACS Applied Engineering Materials 4 (1), 215-224 , 2025 2025 Citations: 1
Performance Assessment of GaN, SiC, and IGBT Technologies for Medium-Power NPC Inverters S Ramasamy, R Maheshwari, A Piras, T Ebel, G Gatto, A Kumar 2025 IEEE 4th Industrial Electronics Society Annual On-Line Conference … , 2025 2025
Performance Evaluation of Small DC-Link Capacitor Based Drive Under Grid Disturbance Conditions R Maheshwari, D Kumar, T Ebel 2025 IEEE 4th International Conference on Smart Technologies for Power … , 2025 2025
Interface engineering of 4H-SiC-based UV photodetectors: A comprehensive review CV Prasad, P Dharmaiah, GH Lee, SR Park, JH Kim, SH Park, HD Kang, ... Materials Today Advances 28, 100662 , 2025 2025 Citations: 3
Application of Supercapacitors to Extend the Critical Clearing Time by Time Domain Equal Area Criterion N Bayati, T Ebel 2025 IEEE 66th International Scientific Conference on Power and Electrical … , 2025 2025
Magnetic Coupling Integration Method in Hybrid IPT Charger Featuring Constant Output Power and Soft Switching in Wide Misalignment Range A Gheysari, AY Varjani, A Babaki, T Ebel IECON 2025–51st Annual Conference of the IEEE Industrial Electronics Society … , 2025 2025
Design and Analysis of a Low-Inductance DC-Link Busbar for 3.3 kV SiC MOSFETs Using Partial Inductance Method and 3D FEM Validation SA Talukder, R Maheshwari, RK Mahapatra, N Christensen, T Ebel IECON 2025–51st Annual Conference of the IEEE Industrial Electronics Society … , 2025 2025
Multiphysics modeling of electrolyzers under dynamic converter operation MA Khan, MR Nielsen, MS Golsorkhi, T Ebel, S Munk-Nielsen International Journal of Hydrogen Energy 176, 151478 , 2025 2025 Citations: 2
MOST CITED SCHOLAR PUBLICATIONS
Ternary aluminides LnT 2 Al 10 (Ln= Y, La–Nd, Sm, Gd–Lu andT= Fe, Ru, Os) with YbFe 2 Al 10 type structure and magneticproperties of the iron-containing series VMT Thiede, T Ebel, W Jeitschko Journal of Materials Chemistry 8 (1), 125-130 , 1998 1998 Citations: 243
EuTa2Al20, Ca6W4Al43 and other compounds with CeCr2Al20 and Ho6Mo4Al43 type structures and some magnetic properties of these compounds VMT Thiede, W Jeitschko, S Niemann, T Ebel Journal of alloys and compounds 267 (1-2), 23-31 , 1998 1998 Citations: 126
Rare earth and uranium transition metal pnictides with LaFe4P12 structure CBH Evers, W Jeitschko, L Boonk, DJ Braun, T Ebel, UD Scholz Journal of alloys and compounds 224 (2), 184-189 , 1995 1995 Citations: 107
Energy management strategies of hybrid electric vehicles: A comparative review N Azim Mohseni, N Bayati, T Ebel IET Smart Grid 7 (3), 191-220 , 2024 2024 Citations: 53
The impact of considering state-of-charge-dependent maximum charging powers on the optimal electric vehicle charging scheduling K Qian, R Fachrizal, J Munkhammar, T Ebel, RC Adam IEEE Transactions on Transportation Electrification 9 (3), 4517-4530 , 2023 2023 Citations: 50
Analytical model for two-dimensional electron gas charge density in recessed-gate GaN high-electron-mobility transistors S Sharbati, I Gharibshahian, T Ebel, AA Orouji, WT Franke Journal of Electronic Materials 50 (7), 3923-3929 , 2021 2021 Citations: 45
Techno-economic analysis and predictive operation of a power-to-hydrogen for renewable microgrids MA Khan, N Bayati, T Ebel Energy conversion and management 298, 117762 , 2023 2023 Citations: 42
Initial stages of the anodic etching of aluminum foils studied by atomic force microscopy J Scherer, OM Magnussen, T Ebel, RJ Behm Corrosion science 41 (1), 35-55 , 1999 1999 Citations: 40
Degradation behavior of scalable nonfullerene organic solar cells assessed by outdoor and indoor ISOS stability protocols W Greenbank, N Djeddaoui, E Destouesse, J Lamminaho, M Prete, ... Energy Technology 8 (12), 2000295 , 2020 2020 Citations: 33
Magnetic properties of rare-earth transition metal aluminides R6T4Al43 with Ho6Mo4Al43-type structure MW Wolff, S Niemann, T Ebel, W Jeitschko Journal of magnetism and magnetic materials 223 (1), 1-15 , 2001 2001 Citations: 30
Preparation, crystal structure, and physical properties of the uranium nickel phosphide U3Ni3. 34P6 T Ebel, W Jeitschko Journal of Solid State Chemistry 116 (2), 307-313 , 1995 1995 Citations: 30
Life cycle assessment and costing of large-scale battery energy storage integration in Lombok’s power grid M Hemmati, N Bayati, T Ebel Batteries 10 (8), 295 , 2024 2024 Citations: 25
Layer-by-layer printable nano-scale polypropylene for precise control of nanocomposite capacitor dielectric morphologies in metallised film capacitors W Greenbank, T Ebel Power Electronic Devices and Components 4, 100025 , 2023 2023 Citations: 24
GdRuC2, a ternary carbide with filled NiAs structure RD Hoffmann, KH Wachtmann, T Ebel, W Jeitschko Journal of Solid State Chemistry 118 (1), 158-162 , 1995 1995 Citations: 22
Life cycle sustainability assessment of waste-to-electricity plants for 2030 power generation development scenarios in western Lombok, Indonesia under multi-criteria decision … M Hemmati, N Bayati, T Ebel Journal of Building Engineering 95, 110335 , 2024 2024 Citations: 21
Large-scale EV charging scheduling considering on-site PV generation by combining an aggregated model and sorting-based methods K Qian, R Fachrizal, J Munkhammar, T Ebel, R Adam Sustainable cities and society 107, 105453 , 2024 2024 Citations: 21
Preparation, properties, and crystal structures of α-and β-ScCrC2 R Pöttgen, AM Witte, W Jeitschko, T Ebel Journal of Solid State Chemistry 119 (2), 324-330 , 1995 1995 Citations: 21
Structure and magnetism of La4Mn5Si4O22 and La4V5Si4O22: Two new rare-earth transition metal sorosilicates C Gueho, D Giaquinta, JL Mansot, T Ebel, P Palvadeau Chemistry of materials 7 (3), 486-492 , 1995 1995 Citations: 21
Preparation, structure refinement, and properties of some compounds with Dy2Fe2Si2C-and LaMn11C2-x-type structure R Pöttgen, T Ebel, CBH Evers, W Jeitschko Journal of Solid State Chemistry 114 (1), 66-72 , 1995 1995 Citations: 21
Integrated optimal energy management of multi-microgrid network considering energy performance index: Global chance-constrained programming framework M Hemmati, N Bayati, T Ebel Energies 17 (17), 4367 , 2024 2024 Citations: 20
