Thermoelectric performance enhancement of Mg2Sn based solid solutions by band convergence and phonon scattering via Pb and Si/Ge substitution for Sn

2016 ◽  
Vol 18 (30) ◽  
pp. 20726-20737 ◽  
Author(s):  
Jun Mao ◽  
Yumei Wang ◽  
Binghui Ge ◽  
Qing Jie ◽  
Zihang Liu ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Solid Solutions ◽  
Performance Enhancement ◽  
Phonon Scattering ◽  
Thermoelectric Performance

The thermoelectric properties of Mg2Sn–Mg2Pb, Mg2Sn–Mg2Si–Mg2Pb, and Mg2Sn–Mg2Ge–Mg2Pb solid solutions are studied.

Bi–Zn codoping in GeTe synergistically enhances band convergence and phonon scattering for high thermoelectric performance

2020 ◽  
Vol 8 (41) ◽  
pp. 21642-21648 ◽  
Author(s):  
Zhe Guo ◽  
Qiang Zhang ◽  
Hongxiang Wang ◽  
Xiaojian Tan ◽  
Fanfan Shi ◽  
...  
Keyword(s):  
Valence Band ◽  
Thermoelectric Properties ◽  
Phonon Scattering ◽  
Thermoelectric Performance ◽  
Multiple Defect

Bi–Zn codoping promotes valence band convergence and strengthens multiple defect-phonon scattering in GeTe, leading to obviously improved thermoelectric properties.

scholarly journals Localized double phonon scattering and DOS induced thermoelectric enhancement of degenerate nonstoichiometric Li1−xNbO2 compounds

RSC Advances ◽  
2017 ◽  
Vol 7 (84) ◽  
pp. 53255-53264 ◽  
Author(s):  
Jamil Ur Rahman ◽  
Nguyen Van Du ◽  
Gul Rahman ◽  
V. M. García-Suárez ◽  
Won-Seon Seo ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Thermoelectric Material ◽  
Significant Role ◽  
Phonon Scattering ◽  
Thermoelectric Performance ◽  
Oxide Thermoelectric Material ◽  
P Type

We report the synthesis and thermoelectric properties of a new p-type oxide thermoelectric material (Li1−xNbO2, with x = 0–0.6), in which Li-vacancies play a significant role in the enhancement of the thermoelectric performance.

scholarly journals Thermoelectric properties of n-type half-Heusler NbCoSn with heavy-element Pt substitution

2020 ◽  
Vol 8 (29) ◽  
pp. 14822-14828 ◽  
Author(s):  
Federico Serrano-Sánchez ◽  
Ting Luo ◽  
Junjie Yu ◽  
Wenjie Xie ◽  
Congcong Le ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Heavy Element ◽  
Performance Enhancement ◽  
Thermoelectric Performance ◽  
Heusler Compound ◽  
Post Annealing

Heavy-element Pt substitution and post-annealing promote the thermoelectric performance enhancement of n-type NbCoSn half-Heusler compound.

High Thermoelectric Performance SnTe–In2Te3 Solid Solutions Enabled by Resonant Levels and Strong Vacancy Phonon Scattering

2015 ◽  
Vol 27 (22) ◽  
pp. 7801-7811 ◽  
Author(s):  
Gangjian Tan ◽  
Wolfgang G. Zeier ◽  
Fengyuan Shi ◽  
Pengli Wang ◽  
G. Jeffery Snyder ◽  
...  
Keyword(s):  
Solid Solutions ◽  
Phonon Scattering ◽  
Thermoelectric Performance

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 Macroscopic weavable fibers of carbon nanotubes with giant thermoelectric power factor

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Natsumi Komatsu ◽  
Yota Ichinose ◽  
Oliver S. Dewey ◽  
Lauren W. Taylor ◽  
Mitchell A. Trafford ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Fermi Energy ◽  
Performance Enhancement ◽  
Thermoelectric Performance ◽  
Thermoelectric Power Factor ◽  
Large Power ◽  
Energy Tuning

AbstractLow-dimensional materials have recently attracted much interest as thermoelectric materials because of their charge carrier confinement leading to thermoelectric performance enhancement. Carbon nanotubes are promising candidates because of their one-dimensionality in addition to their unique advantages such as flexibility and light weight. However, preserving the large power factor of individual carbon nanotubes in macroscopic assemblies has been challenging, primarily due to poor sample morphology and a lack of proper Fermi energy tuning. Here, we report an ultrahigh value of power factor (14 ± 5 mW m−1 K−2) for macroscopic weavable fibers of aligned carbon nanotubes with ultrahigh electrical and thermal conductivity. The observed giant power factor originates from the ultrahigh electrical conductivity achieved through excellent sample morphology, combined with an enhanced Seebeck coefficient through Fermi energy tuning. We fabricate a textile thermoelectric generator based on these carbon nanotube fibers, which demonstrates high thermoelectric performance, weavability, and scalability. The giant power factor we observe make these fibers strong candidates for the emerging field of thermoelectric active cooling, which requires a large thermoelectric power factor and a large thermal conductivity at the same time.

Thermoelectric Performance Enhancement of n-type Chitosan-Bi2Te2.7Se0.3 Composite Films Using Heterogeneous Grains and Mechanical Pressure

2021 ◽  
Vol 50 (5) ◽  
pp. 2840-2851
Author(s):  
Priyanshu Banerjee ◽  
Eunhwa Jang ◽  
Jiyuan Huang ◽  
Rudolph Holley ◽  
Sudharshan Vadnala ◽  
...  
Keyword(s):  
Performance Enhancement ◽  
Composite Films ◽  
Thermoelectric Performance ◽  
Mechanical Pressure

Influence of multi-sintering on the thermoelectric properties of Bi2Sr2Co2Oy ceramics

2019 ◽  
Vol 34 (02) ◽  
pp. 2050019 ◽  
Author(s):  
Y. Zhang ◽  
M. M. Fan ◽  
C. C. Ruan ◽  
Y. W. Zhang ◽  
X.-J. Li ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
Phonon Scattering ◽  
Sintered Sample ◽  
Thermoelectric Figure Of Merit ◽  
Thermoelectric Figure ◽  
The Third ◽  
Ceramic Samples ◽  
Optimum Formula

[Formula: see text] ceramic samples have a structure similar to phonon glass electronic crystals, and their thermoelectric properties can be effectively adjusted through repeated grinding and sintering. The results show that multi-sintering can make their grain refined and increase their grain boundary, which will effectively increase density and phonon scattering. Finally, multi-sintering can reduce the resistivity and thermal conductivity, thus obviously improve thermoelectric figure of merit [Formula: see text] of [Formula: see text]. The optimum [Formula: see text] value of 0.26 is achieved at 923 K by the third sintered sample.

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