Concept

Seebeck coefficient

Publications associées (79)

From nanotubes to single crystals: Co doped TiO2

László Forró, Arnaud Magrez, Endre Horvath, Richard Gaal, Helmuth Berger, Bálint Náfrádi, Jacim Jacimovic, Neda Nikseresht Ghanepour

Millimeter-sized cobalt doped rutile crystals with a bi-pyramidal shape are obtained by chemical vapour transport using scroll-type H2Ti3O7 nanotubes as a precursor in which Co2+ ions are introduced by a simple ion exchange method prior to the growth. Desp ...

Amer Inst Physics2013

Global gyrokinetic simulations of TEM microturbulence

Laurent Villard, Stephan Brunner, Alberto Bottino, Sébastien Jolliet, Ben McMillan, Thibaut Vernay

Global gyrokinetic simulations of electrostatic temperature-gradient-driven trapped-electron-mode (TEM) turbulence using the delta f particle-in-cell code ORB5 are presented. The electron response is either fully kinetic or hybrid, i.e. considering kinetic ...

Iop Publishing Ltd2013

Effects of ZnO film growth route and nanostructure on electron transport and recombination in dye-sensitized solar cells

Michael Graetzel, Thomas Moehl

The photovoltaic performances of ZnO-based dye-sensitized solar cells (DSSCs) have been studied for ZnO porous films prepared by different techniques. A comparison is made between nanoparticle (NP) films prepared by a sol-gel method and two different elect ...

Royal Society of Chemistry2013

Thermocouple Thermal Inertia Effects on Impingement Heat Transfer Experiments Using the Transient Liquid Crystal Technique

Peter Ott, Alexandros Terzis, Bernhard Weigand

The transient liquid crystal technique is widely used for impingement heat transfer experiments. Additionally, due to the difficulty of producing pure temperature steps in the flow, many authors assumed the fluid temperature evolution as a series of step c ...

Institute of Physics2012

Electronic, vibrational, and transport properties of pnictogen-substituted ternary skutterudites

Nicola Marzari, Boris Kozinsky

First principles calculations are used to investigate electronic band structure and vibrational spectra of pnictogen-substituted ternary skutterudites. We compare the results with the prototypical binary composition CoSb3 to identify the effects of substit ...

2012

Microstructure and thermoelectric properties of bulk and porous n-type silicon-germanium alloy prepared by HUP

Cyril Cayron

The optimization of powders preparation and consolidation process leads to the achievement of a high thermoelectric figure of merit (ZT=1.25 at 800°C) in an n-type silicon-germanium (SiGe) alloy hot pressed at low heating rate. It has been experimentally o ...

2012

Pressure dependence of the large-polaron transport in anatase TiO2 single crystals

László Forró, Arnaud Magrez, Richard Gaal, Helmuth Berger, Jacim Jacimovic, George Cristian Vaju, Radomir Zikic

We have measured the pressure and temperature dependences of the resistivity and the thermoelectric power of anatase, TiO2. The resistivity varies with T-3 at high temperatures, and its absolute value is in the 1 Omega cm range. Below 60 K, the resistivity ...

Epl Association, European Physical Society2012

Influence of Thermocouple Thermal Inertia in Impingement Heat Transfer Experiments Using Transient Techniques

Peter Ott, Alexandros Terzis, Bernhard Weigand, Guillaume Wagner

A typical transient heat transfer experiment for an impingement cooling configuration requires usually a temperature step in the flow. A moving isotherm of the liquid crystal surface coating is then monitored using a video camera. However, for small imping ...

2012

From All-Si Nanowire TFETs Towards III-V TFETs

Hesham Ghoneim

Performance improvement by device scaling has been the prevailing method in the semiconductor industry over the past four decades. However, current silicon transistor technology is approaching a fundamental limit where scaling does not improve device perfo ...

EPFL2012

Direct observation of competition between superconductivity and charge density wave order in YBa2Cu3O6.67

Joël Mesot, Johan Juul Chang

Superconductivity often emerges in the proximity of, or in competition with, symmetry-breaking ground states such as antiferromagnetism or charge density waves(1-5) (CDW). A number of materials in the cuprate family, which includes the high transition-temp ...

Nature Publishing Group2012

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