A5075980356- Advanced Thermoelectric Materials and Devices
- Thermal properties of materials
- Thermal Expansion and Ionic Conductivity
- Chalcogenide Semiconductor Thin Films
- Heusler alloys: electronic and magnetic properties
- Thermal Radiation and Cooling Technologies
- Quantum Dots Synthesis And Properties
- Transition Metal Oxide Nanomaterials
- Topological Materials and Phenomena
- Advanced Thermodynamics and Statistical Mechanics
- Perfectionism, Procrastination, Anxiety Studies
- Semiconductor materials and interfaces
- Magnetic and transport properties of perovskites and related materials
Shanghai Jiao Tong University
2021-2024
Henan University
2018-2019
Kaifeng University
2018-2019
We obtained exceptional power factors and zT values in p-type Mg 3 Sb 2 -based materials by alloying Zn at the sites for double band degeneracy Yb 1 of decreased effective mass.
Nano-SiC in Cu<sub>2</sub>Se could facilitate liquid-like behavior to remarkably enhance electrical transport and suppress thermal conductivity simultaneously.
Grain boundary plays a vital role in thermoelectric transports, leading to distinct properties between single crystals and polycrystals. Manipulating the grain realize good polycrystals similar as those of is long-standing task, but it quite challenging. Herein, we develop liquid-phase sintering strategy successfully introduce Mg2Cu nano-sintering-aid into boundaries Mg3(Bi, Sb)2-based materials. The nano-aid helps enlarge average size 23.7 μm effectively scatter phonons, excellent...
Taking Mg 2− δ (Si, Ge, Sn, Bi) as a case study, we demonstrate that the adaptable sublattice can effectively stabilize single-phase high-entropy materials with superior thermoelectric performance.
Critical phenomena are one of the most captivating areas modern physics, whereas relevant experimental and theoretical studies still very challenging. Particularly, underlying mechanism behind anomalous thermoelectric properties during critical phase transitions remains elusive, i.e., current models for electrical transports either qualitative or solely focused on a specific transport parameter. Herein, we develop quantitative theory to model by incorporating both band broadening effect...
BiCuSeO@SnO<sub>2</sub>core-shell nanostructures can introduce multiple potential barriers in SnTe to enhance energy filtering effect.
By considering the electronegativity difference and mass between dopant host elements, we theoretically experimentally demonstrated Gd as an effective to promote thermoelectric performance of Mg 3 Sb 2 -based materials.
To date, thermoelectric materials research stays focused on optimizing the material's band edge details and disfavors low mobility. Here, paradigm is shifted from to mobility edge, exploring high thermoelectricity near border of conduction hopping. Through coalloying iodine sulfur, plain crystal structure modularized liquid-like material Cu2 Te with mosaic nanograins highly size mismatched S/Te sublattice that chemically quenches Cu drives electronic states itinerant localized. A...
SnTe has attracted more and attention due to the similar band crystal structure with high performance thermoelectric materials PbTe. Here, we introduced Pd into valence convergence was confirmed by first-principles calculation. In experimental process, found that Pd-doped exhibit a reduced thermal conductivity because of softening chemical bonds grain refining effects. To further improve performance, Pd-In codoped samples were prepared, abnormal change observed. The results synchrotron...
Hybrid materials provide an efficient alternative route on improving the thermoelectric performance compared with doping elements. Especially, insertion of carbon nanotubes plays effective role in modulating electrical transport properties and phonon scattering simultaneously. We fabricated a multi-walled nanotube (MWCNTs) doped α-MgAgSb-based hybrid material researched its detail. The introduced MWCNTs enhanced carrier due to metallic character dispersion by additional interfaces...
The introduction of special alloy nanoparticles and elemental elements in the matrix can synergistically optimize thermoelectric properties SnTe. Here, MgAgSb 0.5 mol % In are co-doped into SnTe to electrical thermal properties, which finally make performance greatly improved. improvement Seebeck coefficient results from valence band convergence because presence Ag, Mg, Sb atoms a resonant state generated by doping element. addition, carrier mobility is enhanced owing decrease Sn vacancies...
α-MgAgSb shows promise as a potential new low-temperature thermoelectric (TE) material and has been widely researched recently. We explored the effects of sintering conditions on properties MgAgSb-based materials through manipulating spark plasma system (SPS), where Ag vacancies Mg point defects play dominant role. The transport MgAgSb were optimized effectively efficiently, especially for electrical transport. As result, we obtained steady power factor (PF) ∼17 μW cm-1 K-2, owing to optimal...
The thermoelectric hetero nano region, as a new strategy, can effectively modulate the electrical and thermal transport properties. In this study, region is explored to improve performance for Bi0.46Sb1.54Te3 material at room temperature, high ZT of 1.45 325 K has been achieved. We introduce SnTe regions in matrix by mechanical alloying spark plasma sintering technique, which decouples relation between improved conductivity be attributed increase carrier concentration due increased point...