| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Yang, Zhiyong
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Topics
Publications (8/8 displayed)
- 2021High refractive index IR lenses based on chalcogenide glasses molded by spark plasma sinteringcitations
- 2015Mid infrared supercontinuum generation from chalcogenide glass waveguides and fiberscitations
- 2015Mid infrared supercontinuum generation from chalcogenide glass waveguides and fiberscitations
- 2014Relative contribution of stoichiometry and mean coordination to the fragility of Ge-As-Se glass forming liquidscitations
- 2013Thermoelectric bulk glasses based on the Cu-As-Te-Se systemcitations
- 2010Optical microfabrication of tapers in low-loss chalcogenide fiberscitations
- 2010Composition dependence and reversibility of photoinduced refractive index changes in chalcogenide glasscitations
- 2010Opto-electrophoretic detection of bio-molecules using conducting chalcogenide glass sensors.citations
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article
Thermoelectric bulk glasses based on the Cu-As-Te-Se system
Abstract
Stable bulk glasses from the quaternary system Cu-As-Te-Se are investigated for thermoelectric applications. These materials exhibit a low thermal conductivity κ [similar] 0.3 W K−1 m−1 which is appealing for raising the thermoelectric figure of merit ZT. The addition of small amounts of selenium within the telluride amorphous matrix plays two fundamental roles. First, the increased disorder associated with the size mismatch improves glass-formation and widens the glass-formation domain, and second, it increases phonon scattering and slightly decreases the thermal conductivity. Furthermore, the addition of copper up to 32% dramatically increases the electrical conductivity without notably affecting the thermal conductivity. This permits us to obtain bulk glass samples with promising thermoelectric properties, which could be manufactured through conventional low-cost glass casting methods. While addition of copper permits the increase of electrical conductivity by more than six orders of magnitude, another three orders of magnitude are required to obtain thermoelectric materials with competitive ZT. Nevertheless, predicted values of ZT > 1.2 are estimated which would constitute some of the highest reported figure of merit for a bulk solid at room temperature. The effect of glass annealing on thermoelectric properties is also discussed.