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.

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.

scholarly journals Enhanced thermoelectric performance through synergy of resonance levels and valence band convergence via Q/In (Q = Mg, Ag, Bi) co-doping

2018 ◽  
Vol 6 (6) ◽  
pp. 2507-2516 ◽  
Author(s):  
Li Juan Zhang ◽  
Peng Qin ◽  
Chao Han ◽  
Jian Li Wang ◽  
Zhen Hua Ge ◽  
...  
Keyword(s):  
Carrier Concentration ◽  
Valence Band ◽  
Thermoelectric Properties ◽  
Thermoelectric Performance ◽  
Chemical Doping ◽  
Co Doping ◽  
Synergetic Effects

Remarkably improved thermoelectric properties are achieved through the synergetic effects of the resonance levels, the valence band convergence, and the carrier concentration optimization by chemical doping.

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.

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.

scholarly journals Valence Band Modification and High Thermoelectric Performance in SnTe Heavily Alloyed with MnTe

2015 ◽  
Vol 137 (35) ◽  
pp. 11507-11516 ◽  
Author(s):  
Gangjian Tan ◽  
Fengyuan Shi ◽  
Shiqiang Hao ◽  
Hang Chi ◽  
Trevor P. Bailey ◽  
...  
Keyword(s):  
Valence Band ◽  
Thermoelectric Performance
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