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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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Ahmadi, Majid
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (28/28 displayed)
- 2024Giant electrostriction-like response from defective non-ferroelectric epitaxial BaTiO3 integrated on Si (100)citations
- 2024Strong Substrate Influence on Atomic Structure and Properties of Epitaxial VO 2 Thin Filmscitations
- 2024Strong substrate influence on atomic structure and properties of epitaxial VO2 thin filmscitations
- 2024Domains with Varying Conductance in Tensile Strained SrMnO3 Thin Films Using Out-of-Plane Electric Fieldscitations
- 2024Domains with Varying Conductance in Tensile Strained SrMnO 3 Thin Films Using Out-of-Plane Electric Fieldscitations
- 2024Growth mechanism of oleylammonium-based tin and lead bromide perovskite nanostructurescitations
- 2024Giant electrostriction-like response from defective non-ferroelectric epitaxial BaTiO 3 integrated on Si (100)citations
- 2024Metal-Solvent Complex Formation at the Surface of InP Colloidal Quantum Dotscitations
- 2023Strong substrate influence on atomic structure and properties of epitaxial VO2 thin filmscitations
- 2023Van der Waals Epitaxy of Pulsed Laser Deposited Antimony Thin Films on Lattice-matched and Amorphous Substratescitations
- 2023Van der Waals Epitaxy of Pulsed Laser Deposited Antimony Thin Films on Lattice-matched and Amorphous Substratescitations
- 2023Effects of Intermixing in Sb2Te3/Ge1+xTe Multilayers on the Thermoelectric Power Factorcitations
- 2023Nickel Boride (Ni x B) Nanocrystals:From Solid-State Synthesis to Highly Colloidally Stable Inkscitations
- 2023Nickel Boride (NixB) Nanocrystalscitations
- 2022Phase Separation in Ge-Rich GeSbTe at Different Length Scales: Melt-Quenched Bulk versus Annealed Thin Filmscitations
- 2021Editors' Choice - Dealloying-Driven Cerium Precipitation on Intermetallic Particles in Aerospace Aluminium Alloyscitations
- 2020Locally Condensed Water as a Solution for In Situ Wet Corrosion Electron Microscopycitations
- 2020Infrared absorbance of vertically-aligned multi-walled CNT forest as a function of synthesis temperature and timecitations
- 2020How Mn/Ni Ordering Controls Electrochemical Performance in High-Voltage Spinel LiNi0.44Mn1.56O4 with Fixed Oxygen Contentcitations
- 2020How Mn/Ni Ordering Controls Electrochemical Performance in High-Voltage Spinel LiNi0.44Mn1.56O4with Fixed Oxygen Contentcitations
- 2019Growth of multi-layered graphene on molybdenum catalyst by solid phase reaction with amorphous carboncitations
- 2014Highly protective performance of water-based epoxy coating loaded with self-doped nanopolyaniline synthesized under supercritical CO2 conditioncitations
- 2014Surface energy engineering for tunable wettability through controlled synthesis of MoS2citations
- 2013Large scale synthesis of single-crystal and polycrystalline boron nitride nanosheetscitations
- 2013Synthesis, characterization and understanding of the mechanisms of electroplating of nanocrystalline-amorphous nickel-tungsten alloys using in situ electrochemical impedance spectroscopycitations
- 2013Single-step route to hierarchical flower-like carbon nanotube clusters decorated with ultrananocrystalline diamondcitations
- 2012Water-soluble derivatives of octanuclear iron-oxido-pyrazolato complexes - An experimental and computational studycitations
- 2012Single-step route to diamond-nanotube compositecitations
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article
Effects of Intermixing in Sb2Te3/Ge1+xTe Multilayers on the Thermoelectric Power Factor
Abstract
Over the past few decades, telluride-based chalcogenide multilayers, such as PbSeTe/PbTe, Bi2Te3/Sb2Te3, and Bi2Te3/Bi2Se3, were shown to be promising high-performance thermoelectric films. However, the stability of performance in operating environments, in particular, influenced by intermixing of the sublayers, has been studied rarely. In the present work, the nanostructure, thermal stability, and thermoelectric power factor of Sb2Te3/Ge1+xTe multilayers prepared by pulsed laser deposition are investigated by transmission electron microscopy and Seebeck coefficient/electrical conductivity measurements performed during thermal cycling. Highly textured Sb2Te3 films show p-type semiconducting behavior with superior power factor, while Ge1+xTe films exhibit n-type semiconducting behavior. The elemental mappings indicate that the as-deposited multilayers have well-defined layered structures. Upon heating to 210 °C, these layer structures are unstable against intermixing of sublayers; nanostructural changes occur on initial heating, even though the highest temperature is close to the deposition temperature. Furthermore, the diffusion is more extensive at domain boundaries leading to locally inclined structures there. The Sb2Te3 sublayers gradually dissolve into Ge1+xTe. This dissolution depends markedly on the relative Ge1+xTe film thickness. Rather, full dissolution occurs rapidly at 210 °C when the Ge1+xTe sublayer is substantially thicker than that of Sb2Te3, whereas the dissolution is very limited when the Ge1+xTe sublayer is substantially thinner. The resulting variations of the nanostructure influence the Seebeck coefficient and electrical conductivity and thus the power factor in a systematic manner. Our results shed light on a previously unreported correlation of the power factor with the nanostructural evolution of unstable telluride multilayers.