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Article
Design of efficient thermoelectric generators
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Article
Effect of Thermal History on the Properties of Efficient Thermoelectric Alloys Ge0.86Pb0.1Bi0.04Te
In this work, we study thermoelectric properties of GeTei-based alloys, doped with bismuth, with partial substitution of lead for germanium: Ge0.86Pb0.1Bi0.04Te. The aim of the study is to explore the possibility...
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Article
Extreme phonon anharmonicity underpins superionic diffusion and ultralow thermal conductivity in argyrodite Ag8SnSe6
Ultralow thermal conductivity and fast ionic diffusion endow superionic materials with excellent performance both as thermoelectric converters and as solid-state electrolytes. Yet the correlation and interdepe...
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Article
Open AccessA record thermoelectric efficiency in tellurium-free modules for low-grade waste heat recovery
Low-grade heat accounts for >50% of the total dissipated heat sources in industries. An efficient recovery of low-grade heat into useful electricity not only reduces the consumption of fossil-fuels but also re...
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Article
Open AccessSoft-mode dynamics in the ferroelectric phase transition of GeTe
GeTe that exhibits a strong anharmonicity and a ferroelectric phase transition between the rhombohedral and cubic structures has emerged as one of the leading thermoelectric materials. Herein, combining molecu...
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Article
Open AccessLeveraging bipolar effect to enhance transverse thermoelectricity in semimetal Mg2Pb for cryogenic heat pum**
Toward high-performance thermoelectric energy conversion, the electrons and holes must work jointly like two wheels of a cart: if not longitudinally, then transversely. The bipolar effect — the main performanc...
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Article
Open AccessDynamic disorder phonon scattering mediated by Cu atomic hop** and diffusion in Cu3SbSe3
Cu3SbSe3 that exhibits distinct liquid-like sublattice due to the heterogeneous bonding environment has emerged as a promising low cost superionic semiconductor with intrinsic ultralow thermal conductivity. Howev...
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Chapter
SnTe-Based Thermoelectrics
Semiconducting PbTe has historically led to majority of the advancements in thermoelectrics. The realized thermoelectric figure of merit, ZT, has shown to be one of the highest. However, the concern on toxicit...
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Chapter
Lead Chalcogenide Thermoelectric Materials
Lead chalcogenides have long been studied as thermoelectric (TE) materials since the 1950s due to unique electrical and thermal transport properties. The unremitting efforts during the past two decades give ri...
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Article
Open AccessManipulation of charge transport in thermoelectrics
While numerous improvements have been achieved in thermoelectric materials by reducing the lattice thermal conductivity (κ L), electronic approaches for enhancement can be as effective, or...
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Article
Open AccessElectronic origin of the high thermoelectric performance of GeTe among the p-type group IV monotellurides
PbTe and SnTe in their p-type forms have long been considered high-performance thermoelectrics, and both of them largely rely on two valence bands (the first band at L point and the second one along the Σ line) p...
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Article
Open AccessVacancy-induced dislocations within grains for high-performance PbSe thermoelectrics
To minimize the lattice thermal conductivity in thermoelectrics, strategies typically focus on the scattering of low-frequency phonons by interfaces and high-frequency phonons by point defects. In addition, sc...
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Article
Magnetoelectric interaction and transport behaviours in magnetic nanocomposite thermoelectric materials
How to suppress the performance deterioration of thermoelectric materials in the intrinsic excitation region remains a key challenge. The magnetic transition of permanent magnet nanoparticles from ferromagneti...
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Article
Open AccessTellurium as a high-performance elemental thermoelectric
High-efficiency thermoelectric materials require a high conductivity. It is known that a large number of degenerate band valleys offers many conducting channels for improving the conductivity without detriment...
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Chapter
Material Design Considerations Based on Thermoelectric Quality Factor
In this chapter several aspects of the electronic and phonon structure are considered for the design and engineering of advanced thermoelectric materials. For a given compound, its thermoelectric figure of mer...
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Article
Open AccessThermopower enhancement in Pb1−xMnxTe alloys and its effect on thermoelectric efficiency
The Seebeck coefficient of p-type PbTe can be enhanced at 300 K, either due to the addition of Tl-resonant states or by manipulation of the multiple valence bands by alloying with isovalent compounds, such as ...
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Article
Convergence of electronic bands for high performance bulk thermoelectrics
The use of thermoelectric devices to convert waste heat into electricity is anticipated to find many applications, but most thermoelectric materials are relatively inefficient. Attempts are being made to impro...
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Article
High Thermoelectric Power Factor Near Room Temperature in Full-Heusler Alloys
We present results on the electrical resistivity, Seebeck coefficient, and thermal conductivity for the Heusler alloys Fe2VAl1–x Si x and Fe2VAl1–x ...
