A5102739053- Advanced Thermoelectric Materials and Devices
- Chalcogenide Semiconductor Thin Films
- Perovskite Materials and Applications
- Thermal properties of materials
- Perfectionism, Procrastination, Anxiety Studies
- Phase-change materials and chalcogenides
- Thermal Radiation and Cooling Technologies
- Heusler alloys: electronic and magnetic properties
- Advanced Fiber Laser Technologies
- 2D Materials and Applications
- Machine Learning in Materials Science
- Photonic and Optical Devices
- Laser-Matter Interactions and Applications
- Advanced Semiconductor Detectors and Materials
- Quantum Dots Synthesis And Properties
Nanjing University of Science and Technology
2019-2024
Ministry of Industry and Information Technology
2024
Natural (Czechia)
2021
Huazhong University of Science and Technology
2008
Abstract N -type polycrystalline SnSe is considered as a highly promising candidates for thermoelectric applications due to facile processing, machinability, and scalability. However, existing efforts do not enable peak ZT value exceeding 2.0 in n SnSe. Here, we realized significant enhancement by leveraging the synergistic effects of divacancy defect introducing resonance level into conduction band. The increased density states resulting from tungsten boost Seebeck coefficient. combination...
Polycrystalline SnSe is considered as a highly promising candidate for thermoelectric applications due to its facile processing, machinability and scale-up applications.
Polycrystalline SnSe materials with ZT values comparable to those of crystals are greatly desired due facile processing, machinability, and scale-up application. Here manipulating interatomic force by harnessing lattice strains was proposed for achieving significantly reduced thermal conductivity in polycrystalline SnSe. Large static strain created dislocations stacking faults causes an effective shortening phonon relaxation time, resulting ultralow conductivity. A combination band...
The binary compound of GeTe emerging as a potential medium-temperature thermoelectric material has drawn great deal attention. Here, we achieve ultralow lattice thermal conductivity and high performance in In heavy content Cu codoped thermoelectrics. dopants improve the density state near surface Femi by introducing resonant levels, producing sharp increase Seebeck coefficient. codoping not only optimizes carrier concentration but also substantially increases mobility to value 87 cm2 V-1 s-1...
Abstract SnTe is an emerging Pb‐free thermoelectric compound that has drawn significant attention for clean energy conversion. Chemical doping routinely used to tailor its charge carrier concentration and electronic band structures. However, the efficacy of dopants often limited by their small solubility. For example, only 0.5% Ag can be incorporated into matrix. Yet, significantly more (>7%) dissolved if alloyed with AgSbTe 2 . This large enhancement solubility understood from a chemical...
Abstract Here, a high peak ZT of ≈2.0 is reported in solution‐processed polycrystalline Ge and Cd codoped SnSe. Microstructural characterization reveals that CdSe quantum dots are successfully introduced by solution process method. Ultraviolet photoelectron spectroscopy evinces enhance the density states electronic structure SnSe, which leads to large Seebeck coefficient. It found codoping simultaneously optimizes carrier concentration improves electrical conductivity. The enhanced...
SnSe single crystals have gained great interest due to their excellent thermoelectric performance. However, polycrystalline is greatly desired facile processing, machinability, and scale-up application. Here, we report an outstanding high average ZT of 0.88 as well a peak 1.92 in solution-processed nanoplates. Nanosized boundaries formed by nanoplates lattice strain created dislocations stacking faults effectively scatter heat-carrying phonons, resulting ultralow thermal conductivity 0.19 W...
Abstract MnTe emerges as an enormous potential for medium‐temperature thermoelectric applications due to its lead‐free nature, high content of Mn in the earth's crust, and superior mechanical properties. Here, it is demonstrate that multiple valence band convergence can be realized through Pb Ag incorporations, producing large Seebeck coefficient. Furthermore, carrier concentration obviously enhance by codoping, contributing significant enhancement power factor. Moreover, microstructural...
An extraordinary average ZT of ∼1 as well a high peak 1.44 is realized in n-PbSe integrated with quantum dots.
A high average ZT of 0.8 and a peak 1.86 are obtained in porous Zn Ga codoped SnSe nanosheets fabricated by solution synthesis route.
Abstract Here, a new route is proposed for the minimization of lattice thermal conductivity in MnTe through considerable increasing phonon scattering by introducing dense distortions. Dense distortions can be induced Cu and Ag dopants possessing large differences atom radius with host elements, which causes strong results extremely low conductivity. Density functional theory (DFT) calculations reveal that codoping enables multiple valence band convergence produces high density state values...
SnSe crystals have gained considerable interest for their outstanding thermoelectric performance. Here, we achieve excellent properties in Sn0.99-xPbxZn0.01Se via valence band convergence and point-defect engineering strategies. We demonstrate that Pb Zn codoping converges the energy offset between multiple bands by significantly modifying structure, contributing to enhancement of Seebeck coefficient. The carrier concentration electrical conductivity can be optimized, leading an enhanced...
GeTe and its derivatives emerging as a promising lead-free thermoelectric candidate have received extensive attention. Here, new route was proposed that the minimization of κL in through considerable enhancement acoustic phonon scattering by introducing ultrafine ferroelectric domain structure. We found Bi Ca dopants induce strong atomic strain disturbance matrix because large differences atom radius with host elements, leading to formation Furthermore, field mass fluctuation induced...
SnTe, emerging as a promising lead-free thermoelectric candidate, has received great deal of attention for power generation. Here, we report record-high average ZT 1.02 well high peak ∼1.5 through the V/Sb and AgSbTe2 alloying approach in SnTe. We demonstrate that aggregation V interstitials promotes formation dense dislocation arrays networks, which effectively scatters heat-carrying phonons contributes to an extremely low κL ∼0.41 W m–1 K–1. More importantly, provide pinning effects...
摘 要: MnTe