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Performance assessment of an eco-friendly tandem solar cell based on double perovskite Cs₂AgBiBr₆

Chrafih, Younes (author), Al-Hattab, Mohamed (author), El Boubekri, A. (author), Rahmani, Khalid (author), Bajjou, Omar (author), Basyooni, Mohamed A. (author)

Tandem solar cells have a wider photon absorption range, allowing them to provide better efficiency than single-junction SC. The upper cell absorbs high-energy photons, while the lower cell absorbs low-energy filtered photons. However, in order to obtain affordable, efficient, and long-lasting SC, the absorber layers of the top and bottom...

journal article 2024

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Online Fault Detection and Diagnosis in RRAM

Fieback, M. (author), Bradarić, Filip (author), Taouil, M. (author), Hamdioui, S. (author)

Resistive Random Access Memory (RRAM, or ReRAM) is a promising memory technology to replace Flash because of its low power consumption, high storage density, and simple integration in existing IC production processes. This has motivated many companies to invest in this technology. However, RRAM manufacturing introduces new failure mechanisms and...

conference paper 2023

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Guilty as Charged: The Role of Undercoordinated Indium in Electron-Charged Indium Phosphide Quantum Dots

Stam, M. (author), du Fossé, I. (author), Infante, Ivan (author), Houtepen, A.J. (author)

Quantum dots (QDs) are known for their size-dependent optical properties, narrow emission bands, and high photoluminescence quantum yield (PLQY), which make them interesting candidates for optoelectronic applications. In particular, InP QDs are receiving a lot of attention since they are less toxic than other QD materials and are hence...

journal article 2023

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Performance Analysis of the Wind Field Estimation for a Very Fast Scanning Weather Radar

Dash, T.K. (author), Krasnov, O.A. (author), Yarovoy, Alexander (author)

The performance and limitations of the Doppler processing of the scattered signals from extended meteorological objects (precipitation) are analysed in the case of radar with fast azimuthal scanning. The classical method of the Discrete Fourier Transform (DFT) has been applied to simulated weather radar signals to estimate the Doppler velocity...

conference paper 2022

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Structure-Property Relationship of Piezoelectric Properties in Zeolitic Imidazolate Frameworks: A Computational Study

Mula, S. (author), Donà, Lorenzo (author), Civalleri, Bartolomeo (author), van der Veen, M.A. (author)

Metal-organic frameworks (MOFs) are a class of nanoporous crystalline materials with very high structural tunability. They possess a very low dielectric permittivity ϵr due to their porosity and hence are favorable for piezoelectric energy harvesting. Even though they have huge potential as piezoelectric materials, a detailed analysis and...

journal article 2022

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Silicon Carbide Based Nanotubes as a Sensing Material for Gaseous H₂SiCl₂

Doust Mohammadi, Mohsen (author), Abdullah, Hewa Y. (author), Bhowmick, Somnath (author), Biskos, G. (author)

The ability of carbon- and silicon-based nanotubes, including pure carbon, silicon carbide, and Ge-doped silicon carbide nanotubes (CNT, SiCNT, SiCGeNT, respectively), for sensing highly toxic dichlorosilane (H2SiCl2) are investigated using quantum chemistry calculations. The intermolecular interactions between the sensing material and the gas...

journal article 2022

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DFT and experimental study of elemental mercury (Hg⁰) removal by 2D-g-C₃N₄

Liu, G. (author), Yan, Qun (author), Zhou, Yanan (author), Zhang, X. (author), Spanjers, H. (author)

2D-g-C₃N₄ nanosheet was prepared and employed for the adsorption of elemental mercury (Hg⁰). The g-C₃N₄ was analyzed through X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FT-IR) methods, and the results showed that the prepared...

journal article 2021

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Lithiation of the Fe₂P-based magnetocaloric materials: A first-principles study

Batashev, I. (author), de Wijs, G. A. (author), van Dijk, N.H. (author), Brück, E.H. (author)

The physical properties of the extensively studied Fe₂P material family, well-known for its promising magnetocaloric qualities are greatly influenced by the unit-cell parameters of this hexagonal system. This sensitivity of the various magnetocaloric properties to structural parameters is particularly important for developing a...

journal article 2021

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Theoretical investigation of X₁₂O₁₂ (X = Be, Mg, and Ca) in sensing CH₂N₂: A DFT study

Mohammadi, Mohsen Doust (author), Abdullah, Hewa Y. (author), Bhowmick, Somnath (author), Biskos, G. (author)

The feasibility of detecting diazomethane (CH₂N₂) in the gas phase by adsorption onto the exterior surface of inorganic-based X₁₂O₁₂ (where X can be Be, Mg, or Ca) nanocages is investigated here using DFT. All the structures, including those of the pristine CH₂N₂ and of the...

journal article 2021

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Detecting Random Read Faults to Reduce Test Escapes in FinFET SRAMs

Cardoso Medeiros, G. (author), Fieback, M. (author), Gebregiorgis, A.B. (author), Taouil, M. (author), Bolzani Poehls, L. (author), Hamdioui, S. (author)

Manufacturing defects in FinFET SRAMs can cause hard-to-detect faults such as Random Read Faults (RRFs). Detection of RRFs is not trivial, as they may not lead to incorrect outputs. Undetected RRFs become test escapes, which might lead to no-trouble-found devices and early in-field failures. Therefore, the detection of RRFs is of utmost...

conference paper 2021

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Improving the Detection of Undefined State Faults in FinFET SRAMs

Cardoso Medeiros, G. (author), Fieback, M. (author), Copetti, Thiago (author), Gebregiorgis, A.B. (author), Taouil, M. (author), Bolzani Poehls, L. M. (author), Hamdioui, S. (author)

Manufacturing defects in FinFET SRAMs can cause hard-to-detect faults such as Undefined State Faults (USFs). Detection of USFs is not trivial, as they may not lead to incorrect functionality. Nevertheless, undetected USFs may have a severe impact on the memory's quality: they can cause random read outputs, which might lead to test escapes and no...

conference paper 2021

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ATR-FTIR in Kretschmann configuration integrated with electrochemical cell as in situ interfacial sensitive tool to study corrosion inhibitors for magnesium substrates

Fockaert, L.I. (author), Würger, T. (author), Unbehau, R. (author), Boelen, B. (author), Meißner, R. H. (author), Lamaka, S. V. (author), Zheludkevich, M. L. (author), Terryn, H.A. (author), Mol, J.M.C. (author)

Integrated attenuated total reflection – Fourier transform infrared spectroscopy (ATR-FTIR) – Electrochemical impedance spectroscopy (EIS) measurements were used to simultaneously follow chemisorption mechanisms of organic inhibitors as well as their corrosion inhibition efficiency towards magnesium based substrates. Four carboxylic compounds...

journal article 2020

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Calphad Modeling of LRO and SRO Using ab initio Data

Enoki, Masanori (author), Sundman, Bo (author), Sluiter, M.H.F. (author), Selleby, Malin (author), Ohtani, Hiroshi (author)

Results from DFT calculations are in many cases equivalent to experimental data. They describe a set of properties of a phase at a well-defined composition and temperature, T, most often at 0 K. In order to be practically useful in materials design, such data must be fitted to a thermodynamic model for the phase to allow interpolations and...

journal article 2020

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A DFT Scheme to Improve Coverage of Hard-to-Detect Faults in FinFET SRAMs

Cardoso Medeiros, G. (author), Cem Gursoy, Cemil (author), Wu, L. (author), Fieback, M. (author), Jenihhin, Maksim (author), Taouil, M. (author), Hamdioui, S. (author)

Manufacturing defects can cause faults in FinFET SRAMs. Of them, easy-to-detect (ETD) faults always cause incorrect behavior, and therefore are easily detected by applying sequences of write and read operations. However, hard-to-detect (HTD) faults may not cause incorrect behavior, only parametric deviations. Detection of these faults is of...

conference paper 2020

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Catalytic methane conversion with single-site porous catalysts: a computational approach

Szécsényi, A. (author)

In this thesis we presented comprehensive studies on methane activation by binuclear Fe-oxo sites located in porous MOF and zeolite frameworks. Many of such studies have been previously performed, however the main focus was usually on the C-H bond activation of methane. Here we focused on the whole reaction mechanism including the activation of...

doctoral thesis 2019

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Can one define the conductance of amino acids?

Zotti, Linda A. (author), Bednarz, Beatrice (author), Hurtado-Gallego, Juan (author), Cabosart, D.C.N. (author), Rubio-Bollinger, Gabino (author), Agrait, Nicolas (author), van der Zant, H.S.J. (author)

We studied the electron-transport properties of ten different amino acids and one dimer (di-methionine) using the mechanically controlled break-junction (MCBJ) technique. For methionine and cysteine, additional measurements were performed with the scanning tunneling microscope break-junction (STM-BJ) technique. By means of a statistical...

journal article 2019

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Lateral adsorbate interactions inhibit HCOO⁻ while promoting CO selectivity for CO₂ electrocatalysis on silver

Bohra, D. (author), Ledezma Yanez, I.D. (author), Li, G. (author), de Jong, W. (author), Pidko, E.A. (author), Smith, W.A. (author)

Ag is a promising catalyst for the production of carbon monoxide (CO) via the electrochemical reduction of carbon dioxide (CO₂ER). Herein, we study the role of the formate (HCOO⁻) intermediate *OCHO, aiming to resolve the discrepancy between the theoretical understanding and experimental performance of Ag. We show that...

journal article 2019

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Inkjet printing of Sc-Doped TiO₂ with enhanced photoactivity

Keller, Kirill (author), Khramenkova, E. (author), Slabov, Vladislav (author), Musin, Albina (author), Kalashnikov, Alexander (author), Vinogradov, Alexandr V. (author), Pidko, E.A. (author)

Here we report the methodology for nanocomposite fabrication based on the inkjet printing technique. Doped TiO₂ nanoparticles with Sc contents up to 10 wt.% were synthesized and adapted towards a facile fabrication of microscale structures and thin film printing. Implementation of the state-of-the-art low-temperature synthesis...

journal article 2019

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DFT Scheme for Hard-to-Detect Faults in FinFET SRAMs

Cardoso Medeiros, G. (author), Taouil, M. (author), Fieback, M. (author), Bolzani Poehls, L. M. (author), Hamdioui, S. (author)

Hard-to-detect faults such as weak and random faults in FinFET SRAMs represent an important challenge for manufacturing testing in scaled technologies, as they may lead to test escapes. This paper proposes a Design-for-Testability (DFT) scheme able to detect such faults by monitoring the bitline swing of FinFET memories. Using only five...

conference paper 2019

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Modeling level alignment at interfaces in molecular junctions

Celis Gil, J.A. (author)

Molecular devices are planned as alternative solutions for heat dissipation problems and reliable fabrication of nano-scale devices. However, it also opens up possibilities of combining many other degrees of freedom into functional device design. While they introduce interesting opportunities for study, they also demand a versatile, scalable...

doctoral thesis 2017