Refined Band Structure plus Enhanced Phonon Scattering Realize Thermoelectric Performance Optimization in CuI-Mn Codoped SnTe

2021 ◽  
Author(s):  
Gang Wu ◽  
Zhe Guo ◽  
Qiang Zhang ◽  
Xuemei Wang ◽  
Lidong Chen ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Power Generation ◽  
Band Structure ◽  
Performance Optimization ◽  
Phonon Scattering ◽  
Thermoelectric Performance ◽  
Similar Band

With the same crystal structure and similar band structure, SnTe is regarded as an eco-friendly alternative of PbTe for the mid-temperature power generation application, but its thermoelectric performance suffers from...

High-entropy-stabilized chalcogenides with high thermoelectric performance

Science ◽  
2021 ◽  
Vol 371 (6531) ◽  
pp. 830-834 ◽  
Author(s):  
Binbin Jiang ◽  
Yong Yu ◽  
Juan Cui ◽  
Xixi Liu ◽  
Lin Xie ◽  
...  
Keyword(s):  
Thermoelectric Materials ◽  
Performance Optimization ◽  
Figure Of Merit ◽  
Phonon Scattering ◽  
Waste Heat ◽  
Configurational Entropy ◽  
Thermoelectric Performance ◽  
Structural Stabilization ◽  
High Entropy ◽  
Thermoelectric Conversion

Thermoelectric technology generates electricity from waste heat, but one bottleneck for wider use is the performance of thermoelectric materials. Manipulating the configurational entropy of a material by introducing different atomic species can tune phase composition and extend the performance optimization space. We enhanced the figure of merit (zT) value to 1.8 at 900 kelvin in an n-type PbSe-based high-entropy material formed by entropy-driven structural stabilization. The largely distorted lattices in this high-entropy system caused unusual shear strains, which provided strong phonon scattering to largely lower lattice thermal conductivity. The thermoelectric conversion efficiency was 12.3% at temperature difference ΔT = 507 kelvin, for the fabricated segmented module based on this n-type high-entropy material. Our demonstration provides a paradigm to improve thermoelectric performance for high-entropy thermoelectric materials through entropy engineering.

Enhanced thermoelectric performance of band structure engineered GeSe1−xTex alloys

2021 ◽  
Vol 5 (6) ◽  
pp. 1734-1746
Author(s):  
D. Sidharth ◽  
A. S. Alagar Nedunchezhian ◽  
R. Akilan ◽  
Anup Srivastava ◽  
Bhuvanesh Srinivasan ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Band Structure ◽  
Power Factor ◽  
Thermoelectric Performance

The power factor of GeSe enhanced and thermal conductivity decreased by Te substitution and thereby, GeSe0.80Te0.20 exhibits high ZT.

High Thermoelectric Performance of ZnO by Coherent Phonon Scattering and Optimized Charge Transport

2021 ◽  
pp. 2105008
Author(s):  
Somnath Acharya ◽  
Byung‐Kyu Yu ◽  
Junphil Hwang ◽  
Jiyong Kim ◽  
Woochul Kim
Keyword(s):  
Charge Transport ◽  
Phonon Scattering ◽  
Thermoelectric Performance ◽  
Coherent Phonon

scholarly journals First-principles predictions of low lattice thermal conductivity and high thermoelectric performance of AZnSb (A = Rb, Cs)

RSC Advances ◽  
2021 ◽  
Vol 11 (25) ◽  
pp. 15486-15496
Author(s):  
Enamul Haque
Keyword(s):  
Thermal Conductivity ◽  
Debye Temperature ◽  
Layered Structure ◽  
First Principles ◽  
Lattice Thermal Conductivity ◽  
Phonon Scattering ◽  
Thermoelectric Performance

The layered structure, and presence of heavier elements Rb/Cs and Sb induce high anharmonicity, low Debye temperature, intense phonon scattering, and hence, low lattice thermal conductivity.

scholarly journals Engineering Band Structure via the Site Preference of Pb2+ in the In+ Site for Enhanced Thermoelectric Performance of In6Se7

2016 ◽  
Vol 8 (35) ◽  
pp. 23175-23180 ◽  
Author(s):  
Jiaolin Cui ◽  
Min Cheng ◽  
Wenchang Wu ◽  
Zhengliang Du ◽  
Yimin Chao
Keyword(s):  
Band Structure ◽  
Thermoelectric Performance ◽  
Site Preference
Sign in / Sign up

Export Citation Format

Share Document