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Doping effect on the thermoelectric transport properties of HfTe5

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The hybrid halide perovskites, the very performant compounds in photovoltaic applications, possess large Seebeck coefficient and low thermal conductivity, making them potentially interesting high figure of merit (ZT) materials. For this purpose, one needs ...

American Chemical Society2015

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We report resistivity, thermoelectric power, and thermal conductivity of MoS2 single crystals prepared by the chemical vapor transport (CVT) method using I-2, Br-2, and TeCl4 as transport agents. The material presents low-lying donor and acceptor levels, w ...

Amer Chemical Soc2015

Enhanced low-temperature thermoelectrical properties of BiTeCl grown by topotactic method

László Forró, Arnaud Magrez, Richard Gaal, Xavier François Mettan, Helmuth Berger, Philippe Bugnon, Ana Akrap, Andrea Pisoni, Sergiy Katrych, Jacim Jacimovic

We developed a topotactic strategy to grow BiTeCl single crystals. Structural characterization by means of X-ray diffraction was performed, and the high crystallinity of the material was proven. Measurements of the thermoelectrical coefficients electrical ...

Pergamon-Elsevier Science Ltd2014

Space- and time-resolved Seebeck and Nernst voltages in laser-heated permalloy/gold microstructures

Jean-Philippe Ansermet, Dirk Grundler, Arndt Christian von Bieren

Thermoelectric effects in microstructured permalloy (Py) / gold (Au) wires are investigated using spatially and time-resolved measurements based on scanning focused laser heating. Supported by numerical simulations of the temperature distribution, we ident ...

American Institute of Physics2013

Hall Cells Offset Analysis and Modeling Approaches

Maria-Alexandra Paun

The Hall Effect sensors are one of the most commonly used sensing technologies today. They are employed in many applications for direct magnetic field sensing and serve a multitude of low power applications within automotive and industrial electronics as c ...

EPFL2013

Low temperature resistivity, thermoelectricity, and power factor of Nb doped anatase TiO2

László Forró, Arnaud Magrez, Richard Gaal, Jacim Jacimovic

The resistivity of a very high quality anatase TiO2 doped with 6% of Nb was measured from 300K down to 40 mK. No sign of superconductivity was detected. Instead, a minute quantity of cation vacancies resulted in a Kondo scattering. Measurements of thermo-e ...

Amer Inst Physics2013

Temperature considerations on Hall Effect sensors current-related sensitivity behaviour

Maher Kayal, Jean-Michel Sallese, Maria-Alexandra Paun

The present paper focuses on evaluating the temperature effects on Hall Effect sensors sensitivity behavior. To this purpose, an analysis of the factors affecting the sensors current-related sensitivity is performed, consisting of several pertinent conside ...

Springer US2013

Nature of the Charge Carriers and Conduction Mechanism in Anatase TiO2

Jacim Jacimovic

The anatase phase of TiO2 is a key material in the third generation of photovoltaics and for photo-catalytic devices. The number of promising applications, where one would profit from the electronic degrees of freedom of the material, like in memristors, s ...

EPFL2012

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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

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