Concept
Thermoélectricité
Publications associées (161)
Atomic-scale Characterization of Strain and Gate effects on Two-dimensional Materials by Scanning Tunneling Microscopy
Strain is an inevitable phenomenon in two-dimensional (2D) material, regardless of whether the film is suspended or supported. Moreover, strain is known to alter the physical and chemical properties, such as the band gap, charge carrier effective masses, d ...
EPFL2023The nanoscale impact of individual nonradiative point defects on InGaN/GaN quantum wells
Thomas Fjord Kjaersgaard Weatherley
Today's world depends on optoelectronic devices: light-emitting diodes illuminate our houses and backlight the displays on our gadgets, while laser diodes underpin fibre-optic communication. Such optoelectronic devices rely on crystalline semiconductor het ...
EPFL2023A Triethyleneglycol C-60 Mono-adduct Derivative for Efficient Electron Transport in Inverted Perovskite Solar Cells
Mohammad Khaja Nazeeruddin, Konstantina Kalliopi Armadorou, Tobias Seewald
Inverted perovskite solar cells (PSCs) have attracted increasing attention in recent years owing to their low-temperature fabrication proces s. However, they suffer from a limited number of electron transport materials available with [6,6]-phenyl C-61 buty ...
WILEY-V C H VERLAG GMBH2023Large Anomalous Nernst Angle in Co2MnGa Thin Film
Jean-Philippe Ansermet, Haiming Yu, Simon Granville, Junfeng Hu, Yao Zhang, Song Liu
The new trends for anomalous Nernst effect (ANE)-based thermoelectric devices require materials with large ANE values to realize the scalable generation of voltage. Recently, very large ANE values have been observed in single crystals of some novel magneti ...
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022Wigner Formulation of Thermal Transport in Solids
Nicola Marzari, Michele Simoncelli
Two different heat-transport mechanisms are discussed in solids. In crystals, heat carriers propagate and scatter particlelike as described by Peierls's formulation of the Boltzmann transport equation for phonon wave packets. In glasses, instead, carriers ...
AMER PHYSICAL SOC2022General invariance and equilibrium conditions for lattice dynamics in 1D, 2D, and 3D materials
Nicola Marzari, Changpeng Lin, Samuel Poncé
The long-wavelength behavior of vibrational modes plays a central role in carrier transport, phonon-assisted optical properties, superconductivity, and thermomechanical and thermoelectric properties of materials. Here, we present general invariance and equ ...
NATURE PORTFOLIO2022Preparation of amorphous bismuth films by quenched condensation insode of a superconducting magnet
Topological phases in crystalline materials have drawn intense research interest due to their fundamentally unique properties and potential for applications ranging from quantum computation to spintronics. Recently, scientists have extended the theoretical ...
2022Construction of Fe3O4 bridged Pt/g-C3N4 heterostructure with enhanced solar to fuel conversion
Michael Graetzel, Shaik Mohammed Zakeeruddin
In this study, we report the effects of co-catalysts of Pt nanoparticles and Fe3O4 clusters on photocatalytic behaviors of g-C3N4 (CN) and the use of the resulting photocatalyst for CO2 photoreduction to solar fuels in a flow reactor operated at room-tempe ...
ELSEVIER2022Strong temperature-dependent thermoelectric power of IrMn(3)thin films of different thicknesses
Jean-Philippe Ansermet, Haiming Yu, Junfeng Hu, Mukund Krishna Kothari
IrMn(3)thin films were experimentally characterized by thermoelectric power and resistivity as a function of temperature and sample thickness. The Seebeck coefficient shows strong temperature dependence and the value increases with temperature up to 350 K. ...
IOP PUBLISHING LTD2021Cu/Metal Oxide Hybrid Nanocrystals as Electrocatalysts for the CO2 Reduction Reaction
The electrochemical CO2 reduction reaction (CO2RR) is envisioned to play a significant role in achieving carbon neutrality while contributing to storing renewable energies. Cu-based materials are among the most promising electrocatalysts. However, 16 diffe ...
EPFL2021