A5052620902- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Graphene research and applications
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Advanced Thermoelectric Materials and Devices
- Quantum and electron transport phenomena
- Surface and Thin Film Phenomena
- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Organic Electronics and Photovoltaics
- Neural Networks and Reservoir Computing
- Organic Light-Emitting Diodes Research
- Polyoxometalates: Synthesis and Applications
- X-ray Diffraction in Crystallography
- Topological Materials and Phenomena
- Organic and Molecular Conductors Research
- 2D Materials and Applications
- Chemical and Physical Properties of Materials
- Advanced Condensed Matter Physics
- Thermal Radiation and Cooling Technologies
- Ion-surface interactions and analysis
- Molecular Junctions and Nanostructures
- Inorganic Chemistry and Materials
- Theoretical and Computational Physics
École Polytechnique Fédérale de Lausanne
2022-2025
Central Michigan University
2020-2024
University of Trieste
2018-2023
Massanutten Regional Library
2020-2021
AREA Science Park
2018-2021
Abstract High‐performance perovskite solar cells (PSCs) typically require interfacial passivation, yet this is challenging for the buried interface, owing to dissolution of passivation agents during deposition perovskites. Here, limitation overcome with in situ buried‐interface passivation—achieved via directly adding a cyanoacrylic‐acid‐based molecular additive, namely BT‐T, into precursor solution. Classical and ab initio dynamics simulations reveal that BT‐T spontaneously may...
Understanding the relationship between crystal structure, chemical bonding, and lattice dynamics is crucial for design of materials with low thermal conductivities, which are essential in fields as diverse thermoelectrics, barrier coatings, optoelectronics. The bismuthinite-aikinite series, Cu1-x□xPb1-xBi1+xS3 (0 ≤ x 1, where □ represents a vacancy), has recently emerged family n-type semiconductors exceptionally conductivities. We present detailed investigation electronic properties,...
Abstract Surface passivation has been widely employed to suppress non‐radiative charge recombination and prevent interfacial accumulation in perovskite photovoltaics. In this report, carbazole modified with ammonium iodide connected via alkyl chains of different lengths (i.e., ethyl, butyl, hexyl chains) is used form layers on formamidinium lead triiodide FAPbI 3 ‐based films improve operational stability. Owing the strong hydrophobicity moiety, it observed that a layer retain their initial...
Copper-rich sulfides are very promising for energy conversion applications due to their environmental compatibility, cost effectiveness, and earth abundance. Based on a comparative analysis of the structural transport properties Cu3BiS3 with those tetrahedrite (Cu12Sb4S13) other Cu-rich sulfides, we highlight role cationic coordination types networks electrical thermal properties. By precession-assisted 3D electron diffraction analysis, find high anisotropic vibration copper attributed its...
Understanding the mechanism that connects heat transport with crystal structures and order/disorder phenomena is crucial to develop materials ultralow thermal conductivity (κ), for thermoelectric barrier applications, requires study of highly pure materials. We synthesized n-type sulfide CuPbBi5S9 an κ value 0.6-0.4 W m-1 K-1 in temperature range 300-700 K. In contrast prior studies, we show this synthetic does not exhibit ordered gladite mineral structure but instead forms a...
<title>Abstract</title> Formamidinium-lead-iodide (FAPbI<sub>3</sub>) has established itself as the state of art for high solar-energy conversion efficiency in perovskite-based solar cells. FAPbI<sub>3</sub> a rich phase diagram, and it been noted that long-range correlation between organic lattice dipoles can influence transitions and, consequently, optoelectronic properties. In this regard, system size effects play crucial role an appropriate theoretical description FAPbI<sub>3</sub>....
Metal halide perovskites have shown exceptional potential in converting solar energy to electric power photovoltaics, yet their application is hampered by limited operational stability. This stimulated the development of hybrid layered (two‐dimensional, 2D) based on hydrophobic organic spacers, templating perovskite slabs, as a more stable alternative. However, conventional spacer cations are electronically insulating, resulting charge confinement within inorganic thus limiting...
Metal halide perovskites have shown exceptional potential in converting solar energy to electric power photovoltaics, yet their application is hampered by limited operational stability. This stimulated the development of hybrid layered (two-dimensional, 2D) based on hydrophobic organic spacers, templating perovskite slabs, as a more stable alternative. However, conventional spacer cations are electronically insulating, resulting charge confinement within inorganic thus limiting...
The discovery of the monoclinic Cu<sub>5</sub>Sn<sub>2</sub>S<sub>7</sub>phase adds a high mobility member to Cu–Sn–S diagram and demonstrates how crystal structure can be advantageously manipulated design novel compositions for energy-oriented applications.
S-based semiconductors are attracting attention as environmentally friendly materials for energy-conversion applications because of their structural complexity and chemical flexibility. Here, we show that the delicate interplay between composition cationic order/disorder allows one to stabilize a new sphalerite derivative phase cubic symmetry in Cu-Sn-S diagram: Cu22Sn10S32. Interestingly, its crystal structure is characterized by semiordered distribution, with Cu-Sn disorder being localized...
To investigate pathways to adjust the charge carrier concentration and optimize thermoelectric properties, we characterized structural thermal stability, performance of pristine Cl-doped Cu5+εSn2−εS7. We demonstrate that Cl doping in Cu5Sn2S7-type monoclinic compounds induces a collapse long-range cationic ordering, ultimately leading sphalerite-type cubic phase by ordered [Sn(S,Cl)4]x clusters. The change crystal structure symmetry upon is analyzed Rietveld refinements against X-ray powder...
Ni adatoms incorporated in epitaxial graphene during growth on Ni(111) are identified by scanning tunneling microscopy and density functional theory calculations.
The electronic properties of graphene can be modified by the local interaction with a selected metal substrate. To probe this effect, Scanning Tunneling Microscopy is widely employed, particularly means measurement via lock-in amplifier differential conductance and field emission resonance. In article we propose an alternative, reliable method probing graphene/substrate that readily available to any STM apparatus. By testing tunneling current as function tip/sample distance on nanostructured...
The stability of hybrid organic-inorganic halide perovskite semiconductors remains a significant obstacle to their application in photovoltaics. To this end, the use low-dimensional (LD) perovskites, which incorporate hydrophobic organic moieties, provides an effective strategy improve stability, yet often at expense performance. address limitation, supramolecular engineering noncovalent interactions between and inorganic components has shown potential by relying on hydrogen bonding...
Abstract Lateral quantum confinement is of great interest in tuning the electronic properties graphene‐based nanostructures, making them suitable for technological applications. In principle, these might be controlled through edge topology: example, zigzag nanoribbons are predicted to have spin‐polarized states. The practical realization structures utmost importance fully harnessing graphene. Here, formation regular, 1.4 nm wide ribbon‐like graphene with edges reported, showing 1D It found...
Quantum annealers have grown in complexity to the point that quantum computations involving a few thousand qubits are now possible. In this paper, with intentions show feasibility of annealing tackle problems physical relevance, we used simple model, compatible capability current annealers, study relative stability graphene vacancy defects. By mapping crucial interactions dominate carbon-vacancy interchange onto quadratic unconstrained binary optimization problem, our approach exploits...
Material design and modelling: Chair introduction - Virginia CarnevaliVirginia Carnevali aa École Polytechnique Fédérale de Lausanne (EPFL), Station 6, LAUSANNE, SwitzerlandInternational Conference on Hybrid Organic PhotovoltaicsProceedings of International Photovoltaics (HOPV24)València, Spain, 2024 May 12th 15thOrganizer: Bruno EhrlerContributed talk, Carnevali, presentation 237DOI: https://doi.org/10.29363/nanoge.hopv.2024.237Publication date: 6th February 2024Session 1B1 © FUNDACIO DE LA...