A5091695147- Advanced Thermoelectric Materials and Devices
- Chalcogenide Semiconductor Thin Films
- Thermal properties of materials
- 2D Materials and Applications
- Thermal Expansion and Ionic Conductivity
- Quantum Dots Synthesis And Properties
- Heusler alloys: electronic and magnetic properties
- Inorganic Chemistry and Materials
- Solid-state spectroscopy and crystallography
- Spectroscopy and Quantum Chemical Studies
- Laser-Matter Interactions and Applications
- Rare-earth and actinide compounds
- Optical properties and cooling technologies in crystalline materials
- Organic and Molecular Conductors Research
- Iron-based superconductors research
- Immunotherapy and Immune Responses
- Advanced Battery Materials and Technologies
- Cancer Immunotherapy and Biomarkers
- Machine Learning in Materials Science
- Thermal Radiation and Cooling Technologies
- Phase-change materials and chalcogenides
- Perovskite Materials and Applications
- Topological Materials and Phenomena
- CO2 Reduction Techniques and Catalysts
- Material Dynamics and Properties
École Nationale Supérieure d'Ingénieurs de Caen
2023-2025
Centre National de la Recherche Scientifique
2023-2025
Northwestern Polytechnical University
2025
Normandie Université
2023-2024
Dartmouth College
2024
Ningbo University
2024
Université de Caen Normandie
2023-2024
Laboratoire de Cristallographie et Sciences des Matériaux
2023-2024
Technical University of Darmstadt
2024
Hong Kong University of Science and Technology
2024
Recently, metal sulfides have begun to receive attention as potential cost-effective materials for thermoelectric applications beyond optoelectronic and photovoltaic devices. Herein, based on a comparative analysis of the structural transport properties 2D PbSnS2 1D PbSnS3, we demonstrate that intrinsic effects govern low lattice thermal conductivity (κL) these originate from combination dimensionality their crystal structures with stereochemical activity lone-pair electrons cations. The...
A comparison of the thermoelectric performance and compatibility between composite in this study other state-of-art IV–VI compounds.
Developing cost-effective and reliable solid-state sodium batteries with superior performance is crucial for stationary energy storage. A key component in facilitating their application a electrolyte high conductivity stability. Herein, we employed aliovalent cation substitution to enhance ionic while preserving the crystal structure. Optimized of Y3+ Zr4+ Na5YSi4O12 introduced Na+ ion vacancies, resulting bulk total conductivities up 6.5 3.3 mS cm–1, respectively, at room temperature...
Abstract Materials with low thermal conductivity usually have complex crystal structures. Herein we experimentally find that a simple structure material AgTlI 2 (I4/mcm) owns an extremely of 0.25 W/mK at room temperature. To understand this anomaly, perform in-depth theoretical studies based on ab initio molecular dynamics simulations and anharmonic lattice dynamics. We the unique atomic arrangement weak chemical bonding provide permissive environment for strong oscillations Ag atoms,...
Argyrodites with a general chemical formula of A8BX6 (A = Cu, Ag; B Si, Ge, Sn; and X S, Se, Te) are known for the intimate interplay among mobile ions, electrons, phonons, which yields rich material physics materials chemistry phenomena. In particular, coexistence fast ionic conduction promising thermoelectric performance in Ag8GeTe6, Ag8SnSe6, Ag8SiTe6, Ag8SiSe6, Cu8GeSe6 at high temperatures ushered us to their neighbor Ag8GeSe6, whose high-temperature crystal structure properties not yet...
Thermoelectrics is a clean energy technology that converts thermal into electrical and provides an environmentally friendly viable route to produce electricity. In this work, we thoroughly explore the thermoelectric performance of two novel ternary pnictide compounds, NaBeAs NaBeSb, using full ab initio calculations solving linear Boltzmann transport equations. We predict both compounds exhibit excellent dynamical stability. The combined effect low phonon group velocity weak bonding...
Abstract Due to their amorphous‐like ultralow lattice thermal conductivity both below and above the superionic phase transition, crystalline Cu‐ Ag‐based argyrodites have garnered widespread attention as promising thermoelectric materials. However, despite intriguing properties, quantifying conductivities a comprehensive understanding of microscopic dynamics that drive these extraordinary properties are still lacking. Here, an integrated experimental theoretical approach is adopted reveal...
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...
Abstract Argyrodites with a general chemical formula of A 8 BC 6 are known for complex phase transitions, ultralow lattice thermal conductivity, and mixed electronic ionic conduction. The coexistence conduction promising thermoelectric performance have recently been reported in selenide telluride argyrodites, but scarcely sulfide argyrodites. Here, the properties Ag Sn(S 1− x Se ) reported. Specifically, SnS exhibits intrinsically conductivities 0.61–0.31 W m −1 K over whole temperature...
Understanding the high-pressure lattice dynamics is crucial to modulate thermal transport in thermoelectric materials beyond ambient environment. Herein, using molecular simulations combination with an accurate machine-learning interatomic potential, we find well-known double-peak feature of transverse-optical (TO) mode PbTe gradually vanishes when pressure enhanced. An anomalous nonmonotonic dependence frequency transverse-acoustic phonon computationally reproduced. The...
Suppressing of an ordered state that competes with superconductivity is one route to enhance superconducting transition temperatures. Whereas the effect suppressing magnetic states still not fully understood, materials featuring charge-density waves and offer a clearer scenario as both can be associated electron-phonon coupling. Metallic transition-metal dichalcogenides are prime examples for such intertwined electron-phonon-driven phases, yet, various compounds do show expected...
Cs 2 AgSbX 6 (X = Cl, Br, I) double perovskites with excellent stability, optimal bandgaps, strong optical absorption, and high figures of merit are promising materials for optoelectronic thermoelectric energy conversion.
Crystals exhibiting glass-like and low lattice thermal conductivity ( κL$\kappa_{\rm L}$ ) are not only scientifically intriguing but also practically valuable in various applications, including barrier coatings, thermoelectric energy conversion, management. However, such unusual κL$\kappa _{\rm typically observed compounds containing heavy elements, with large unit cells, or at high temperatures. In this study, chemical bonding principles utilized to weaken the Ag-Ag bonds enhance...
In this work, a nonequilibrium melt spinning (MS) technology combined with hot pressing was adopted for rapid synthesizing of SnTe compounds in less than 1 h. The refined microstructure generated by MS significantly decreases the lattice thermal conductivity. Compared to pristine sample prepared traditional melting and long-term annealing, melt-spun one reveals 15% lower conductivity ∼6.8 W/m K at room temperature 10% higher zT ∼0.65 900 K. To further improve electrical transport properties...
A successful large-scale synthesis of p-type Cu<sub>5</sub>FeS<sub>4</sub> nanocrystals for thermoelectric applications is achieved. The peak <italic>zT</italic> value reached 0.56 at 690 K, about 47% higher than the-state-of-art this material.
An alternative strategy to create optimum band shape for superior thermoelectric performance by utilizing stereochemically active lone pair electrons is proposed, which has been demonstrated in the Ag<sub>6</sub>Ge<sub>10(1−x)</sub>Ga<sub>10x</sub>P<sub>12</sub>.
Indium selenide, a III–V group semiconductor with layered structure, attracts intense attention in various photoelectric applications, due to its outstanding properties. Here, we report super deformability and thermoelectricity of γ -InSe single crystals grown by modified Bridgeman method. The crystal structure InSe is studied systematically transmission electron microscopy methods combined x-ray diffraction Raman spectroscopy. predominate phase dense stacking faults local multiphases...
The structural coexistence of dual rigid and mobile sublattices in superionic Argyrodites yields ultralow lattice thermal conductivity along with decent electrical ionic conductivities therefore attracts intense interest for batteries, fuel cells, thermoelectric applications. However, a comprehensive understanding their underlying diffusive dynamics terms the interplay between phonons ions is missing. Herein, inelastic neutron scattering employed to unravel that phonon softening on heating...