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Article
Open AccessHigh performance magnesium-based plastic semiconductors for flexible thermoelectrics
Low-cost thermoelectric materials with simultaneous high performance and superior plasticity at room temperature are urgently demanded due to the lack of ever-lasting power supply for flexible electronics. How...
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Article
Strong phonon softening and avoided crossing in aliovalence-doped heavy-band thermoelectrics
Aliovalent do** is a way to optimize the electrical properties of semiconductors, but its impact on the phonon structure and propagation is seldom considered properly. Here we show that aliovalent do** can...
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Article
Open AccessDemonstration of valley anisotropy utilized to enhance the thermoelectric power factor
Valley anisotropy is a favorable electronic structure feature that could be utilized for good thermoelectric performance. Here, taking advantage of the single anisotropic Fermi pocket in p-type Mg3Sb2, a feasible...
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Article
Open AccessEstablishing the carrier scattering phase diagram for ZrNiSn-based half-Heusler thermoelectric materials
Chemical do** is one of the most important strategies for tuning electrical properties of semiconductors, particularly thermoelectric materials. Generally, the main role of chemical do** lies in optimizing...
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Article
Open AccessAnomalous Nernst effect beyond the magnetization scaling relation in the ferromagnetic Heusler compound Co2MnGa
Applying a temperature gradient in a magnetic material generates a voltage that is perpendicular to both the heat flow and the magnetization. This phenomenon is the anomalous Nernst effect (ANE), which was lon...
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Article
Open AccessDeparture from the Wiedemann–Franz law in WP2 driven by mismatch in T-square resistivity prefactors
The Wiedemann–Franz law establishes a link between heat and charge transport due to electrons in solids. The extent of its validity in the presence of inelastic scattering is a question raised in different con...
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Article
Open AccessAttaining high mid-temperature performance in (Bi,Sb)2Te3 thermoelectric materials via synergistic optimization
For decades, zone-melted Bi2Te3-based alloys have been the most widely used thermoelectric materials with an optimal operation regime near room temperature. However, the abundant waste heat in the mid-temperature...
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Article
Open AccessRealizing high figure of merit in heavy-band p-type half-Heusler thermoelectric materials
Solid-state thermoelectric technology offers a promising solution for converting waste heat to useful electrical power. Both high operating temperature and high figure of merit zT are desirable for high-efficienc...
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Article
Reliable measurements of the Seebeck coefficient on a commercial system
The Seebeck coefficient is an important parameter of thermoelectric materials, which is routinely measured by commercial or home-made equipment based on different methods. However, due to various temperature o...
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Article
Open AccessThe intrinsic disorder related alloy scattering in ZrNiSn half-Heusler thermoelectric materials
The intrinsic structural disorder dramatically affects the thermal and electronic transport in semiconductors. Although normally considered an ordered compound, the half-Heusler ZrNiSn displays many transport ...
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Article
High performance half-Heusler thermoelectric materials with refined grains and nanoscale precipitates
(Zr, Hf)NiSn-based half-Heusler alloys with refined grains were prepared by melt spinning and spark plasma sintering. The grain size of the melt-spun (MS) thin ribbons varied from ∼500 nm to ∼3 μm. X-ray diffr...
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Article
Synthesis and Transport Properties of In4(Se1−x Te x )3
Polycrystalline samples of In4(Se1−x Te x )3 were synthesized by using a melting–quenching–annealing process. The thermoelectric performance of the sample...
