A5068778589- Advanced Thermoelectric Materials and Devices
- Chalcogenide Semiconductor Thin Films
- Thermal properties of materials
- Thermal Radiation and Cooling Technologies
- Phase-change materials and chalcogenides
- Electronic Packaging and Soldering Technologies
- High-Temperature Coating Behaviors
- High Entropy Alloys Studies
- Intermetallics and Advanced Alloy Properties
- Semiconductor materials and interfaces
- Advanced Thermodynamics and Statistical Mechanics
- 3D IC and TSV technologies
- Quantum Dots Synthesis And Properties
- nanoparticles nucleation surface interactions
- Advanced Semiconductor Detectors and Materials
- 2D Materials and Applications
- Aluminum Alloy Microstructure Properties
- Perovskite Materials and Applications
- Additive Manufacturing Materials and Processes
- Dental materials and restorations
- Corrosion Behavior and Inhibition
- Thermal Expansion and Ionic Conductivity
- Metallurgical and Alloy Processes
- Advanced Welding Techniques Analysis
- Solar-Powered Water Purification Methods
National Yang Ming Chiao Tung University
2019-2025
National Taiwan University
2024-2025
National Tsing Hua University
2008-2021
National Sun Yat-sen University
2014-2019
California Institute of Technology
2012
Abstract Phase transition in thermoelectric (TE) material is a double‐edged sword—it undesired for device operation applications, but the fluctuations near an electronic instability are favorable. Here, Sb doping used to elicit spontaneous composition fluctuation showing uphill diffusion GeTe that otherwise suspended by diffusionless athermal cubic‐to‐rhombohedral phase at around 700 K. The interplay between these two transitions yields exquisite and coexistence of cubic rhombohedral phases...
Abstract In this work, a high thermoelectric figure of merit, zT 1.9 at 740 K is achieved in Ge 1−x Bi x Te crystals through the concurrent Seebeck coefficient enhancement and thermal conductivity reduction with dopants. The substitution for not only compensates superfluous hole carriers pristine GeTe but also shifts Fermi level ( E F ) to an eligible region. Experimentally, moderate 6–10% dopants, carrier concentration drastically decreased from 8.7 × 10 20 cm −3 3–5 boosted three times 75...
Single-crystalline SnSe has attracted much attention because of its record high figure-of-merit ZT ≈ 2.6; however, this been associated with the low mass density samples which leaves intrinsic fully dense pristine in question. To end, we prepared high-quality single crystals and performed detailed structural, electrical, thermal transport measurements over a wide temperature range along major crystallographic directions. Our were purity as confirmed via statistics 119Sn Mössbauer...
Abstract PbTe‐based alloys have been widely used as mid‐temperature thermoelectric (TE) materials since the 1960s. Years of endeavor spurred tremendous advances in their TE performance. The breakthroughs for n ‐type PbTe somewhat less impressive, which limits overall conversion efficiency a device. In light this obstacle, an Ga‐doped via alternative thermodynamic route that relies on equilibrium phase diagram and microstructural evolution is revisited. Herein, plateau zT = 1.2 achieved...
Abstract Silver chalcogenides exhibit exceptional transport properties but face structural instability at high temperatures, limiting their practical applications. Using Ag 2 Te as a model, it is confirm that silver whisker growth above the phase transition renders unsuitable for thermoelectric Here, mechanism investigated and propose an inhibition strategy, overcoming major obstacle in using chalcogenides. The presence of highly mobile lattice strain cause by are two factors leading to...
Lead tellurides have been recognized as state-of-the-art thermoelectric generators (TEGs) for over 60 years. Recent efforts aim to lift the performance of n-type lead telluride (PbTe). Instead doping elemental electron donors, we add liquid-like Cu2S into a fully dense PbTe crystal, enabling mixture ionic and electronic conductors. The homogeneously distributed nanoparticles act active dynamically pinning solubility Cu an optimal value. Adding also elicits hierarchical defects, constituting...
Abstract AgSbTe 2 plays a pivotal role in mid‐temperature thermoelectric generators (TEGs). Leveraging the seminal advances cation manipulation within , this study demonstrates an enhanced TE power factor ( PF = S σ ) of 1.5 mWm −1 K −2 and peak zT at 583 off‐stoichiometric Ag 1.04 Sb 0.96 Te crystal. The introduction Ge place leads to increased n H as evidenced by detection trace 4+ through XPS analysis. Further chemical state analysis reveals simultaneous presence + 3+ elucidating effect...
Medium-entropy alloys (MEAs) have attracted considerable attention in recent decades due to their exceptional material properties and design flexibility. In this study, lightweight non-equiatomic MEAs with low density (~5 g/cm3), high strength (yield strength: 1200 MPa), ductility (plastic deformation: ≧10%) were explored. We fine-tuned a previously developed Ti-rich MEA by microalloying it small amounts of Ni (reducing the atomic radius increasing elastic modulus) through solid solution...