High Power Factor and Enhanced Thermoelectric Performance of SnTe-AgInTe2: Synergistic Effect of Resonance Level and Valence Band Convergence

2016 ◽  
Vol 138 (39) ◽  
pp. 13068-13075 ◽  
Author(s):  
Ananya Banik ◽  
U. Sandhya Shenoy ◽  
Sujoy Saha ◽  
Umesh V. Waghmare ◽  
Kanishka Biswas
Keyword(s):  
Synergistic Effect ◽  
Valence Band ◽  
Power Factor ◽  
High Power ◽  
Resonance Level ◽  
Thermoelectric Performance ◽  
High Power Factor

A High Thermoelectric Performance ZT in p-Type LaSe2 Crystal

2021 ◽  
Vol 871 ◽  
pp. 203-207
Author(s):  
Jian Liu
Keyword(s):  
Thermal Conductivity ◽  
Power Factor ◽  
High Power ◽  
Density Functional ◽  
Lattice Thermal Conductivity ◽  
Phonon Transport ◽  
Thermoelectric Performance ◽  
Boltzmann Transport ◽  
High Power Factor ◽  
P Type

In this work, we use first principles DFT calculations, anharmonic phonon scatter theory and Boltzmann transport method, to predict a comprehensive study on the thermoelectric properties as electronic and phonon transport of layered LaSe2 crystal. The flat-and-dispersive type band structure of LaSe2 crystal offers a high power factor. In the other hand, low lattice thermal conductivity is revealed in LaSe2 semiconductor, combined with its high power factor, the LaSe2 crystal is considered a promising thermoelectric material. It is demonstrated that p-type LaSe2 could be optimized to exhibit outstanding thermoelectric performance with a maximum ZT value of 1.41 at 1100K. Explored by density functional theory calculations, the high ZT value is due to its high Seebeck coefficient S, high electrical conductivity, and low lattice thermal conductivity .

Realized high power factor and thermoelectric performance in Cu2SnSe3

2019 ◽  
Vol 159 ◽  
pp. 46-50 ◽  
Author(s):  
J. Zhang ◽  
L.L. Huang ◽  
X.G. Zhu ◽  
Z.M. Wang ◽  
C.J. Song ◽  
...  
Keyword(s):  
Power Factor ◽  
High Power ◽  
Thermoelectric Performance ◽  
High Power Factor

Realized high power factor and thermoelectric performance in Cu3SbSe4

2019 ◽  
Vol 109 ◽  
pp. 68-73 ◽  
Author(s):  
J.M. Li ◽  
D. Li ◽  
C.J. Song ◽  
L. Wang ◽  
H.X. Xin ◽  
...  
Keyword(s):  
Power Factor ◽  
High Power ◽  
Thermoelectric Performance ◽  
High Power Factor

scholarly journals High Power Factor and Enhanced Thermoelectric Performance in Sc and Bi Codoped GeTe: Insights into the Hidden Role of Rhombohedral Distortion Degree

2020 ◽  
Vol 10 (42) ◽  
pp. 2002588 ◽  
Author(s):  
Zihang Liu ◽  
Weihong Gao ◽  
Wenhao Zhang ◽  
Naoki Sato ◽  
Quansheng Guo ◽  
...  
Keyword(s):  
Power Factor ◽  
High Power ◽  
Thermoelectric Performance ◽  
Rhombohedral Distortion ◽  
High Power Factor

An enhanced Seebeck coefficient and high thermoelectric performance in p-type In and Mg co-doped Sn1−xPbxTe via the co-adjuvant effect of the resonance level and heavy hole valence band

2017 ◽  
Vol 5 (23) ◽  
pp. 5737-5748 ◽  
Author(s):  
Subhajit Roychowdhury ◽  
U. Sandhya Shenoy ◽  
Umesh V. Waghmare ◽  
Kanishka Biswas
Keyword(s):  
Synergistic Effect ◽  
Seebeck Coefficient ◽  
Valence Band ◽  
Heavy Hole ◽  
Resonance Level ◽  
Thermoelectric Performance ◽  
Adjuvant Effect ◽  
P Type ◽  
Co Doped

Remarkable enhancement of the Seebeck coefficient of an Sn rich Sn1−xPbxTe system due to the synergistic effect of resonance level formation and valence band convergence.

Origin of high thermoelectric performance with a wide range of compositions for BixSb2−xTe3 single quintuple layers

2019 ◽  
Vol 21 (3) ◽  
pp. 1315-1323 ◽  
Author(s):  
Zhen Li ◽  
Siyu Han ◽  
Yuanchun Pan ◽  
Naihua Miao ◽  
Jian Zhou ◽  
...  
Keyword(s):  
Power Factor ◽  
High Power ◽  
Thermoelectric Performance ◽  
High Power Factor ◽  
Wide Range ◽  
Valence Bands ◽  
P Type

The high power factor of a p-type BST single QL is ensured by the robust multi-valley character of valence bands.

Achieving high power factor and thermoelectric performance through dual substitution of Zn and Se in tetrahedrites Cu12Sb4S13

2019 ◽  
Vol 115 (18) ◽  
pp. 182102 ◽  
Author(s):  
Chen Zhu ◽  
Hongwei Ming ◽  
Lulu Huang ◽  
Baoli Zhang ◽  
Xunuo Lou ◽  
...  
Keyword(s):  
Power Factor ◽  
High Power ◽  
Thermoelectric Performance ◽  
High Power Factor

High thermoelectric performance of superionic argyrodite compound Ag8SnSe6

2016 ◽  
Vol 4 (24) ◽  
pp. 5806-5813 ◽  
Author(s):  
Lin Li ◽  
Yuan Liu ◽  
Jiyan Dai ◽  
Aijun Hong ◽  
Min Zeng ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Material ◽  
Power Factor ◽  
High Power ◽  
Figure Of Merit ◽  
Environmentally Friendly ◽  
Thermoelectric Performance ◽  
Low Thermal Conductivity ◽  
High Power Factor ◽  
High Figure

A good thermoelectric material usually has a high power factor and low thermal conductivity for high figure of merit (ZT), and is also environmentally friendly and economical.

scholarly journals High Thermoelectric Performance Achieved in Sb-Doped GeTe by Manipulating Carrier Concentration and Nanoscale Twin Grains

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 406
Author(s):  
Chao Li ◽  
Haili Song ◽  
Zongbei Dai ◽  
Zhenbo Zhao ◽  
Chengyan Liu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Seebeck Coefficient ◽  
Power Factor ◽  
High Power ◽  
Hole Concentration ◽  
Thermoelectric Performance ◽  
Significant Suppression ◽  
Valence States ◽  
High Power Factor ◽  
Sb Doping

Lead-free and eco-friendly GeTe shows promising mid-temperature thermoelectric applications. However, a low Seebeck coefficient due to its intrinsically high hole concentration induced by Ge vacancies, and a relatively high thermal conductivity result in inferior thermoelectric performance in pristine GeTe. Extrinsic dopants such as Sb, Bi, and Y could play a crucial role in regulating the hole concentration of GeTe because of their different valence states as cations and high solubility in GeTe. Here we investigate the thermoelectric performance of GeTe upon Sb doping, and demonstrate a high maximum zT value up to 1.88 in Ge0.90Sb0.10Te as a result of the significant suppression in thermal conductivity while maintaining a high power factor. The maintained high power factor is due to the markable enhancement in the Seebeck coefficient, which could be attributed to the significant suppression of hole concentration and the valence band convergence upon Sb doping, while the low thermal conductivity stems from the suppression of electronic thermal conductivity due to the increase in electrical resistivity and the lowering of lattice thermal conductivity through strengthening the phonon scattering by lattice distortion, dislocations, and twin boundaries. The excellent thermoelectric performance of Ge0.90Sb0.10Te shows good reproducibility and thermal stability. This work confirms that Ge0.90Sb0.10Te is a superior thermoelectric material for practical application.

scholarly journals High Thermoelectric Performance Achieved in Sb-doped GeTe by Manipulating Carrier Concentration and Nanoscale Twin Grains

2021 ◽  
Author(s):  
Chao Li ◽  
Haili Song ◽  
Lei Miao ◽  
Chengqiang Cui ◽  
Chengyan Liu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Power Factor ◽  
High Power ◽  
Thermoelectric Performance ◽  
Significant Suppression ◽  
Practical Application ◽  
Promising Candidate ◽  
High Power Factor ◽  
High Maximum ◽  
Sb Doping

Abstract Lead-free and eco-friendly GeTe shows a promising candidate for mid-temperature thermoelectric application. However, a low Seebeck coefficient due to its intrinsically high holes concentration that induced by Ge vacancies, and a relatively high thermal conductivity result in an inferior thermoelectric performance of pristine GeTe. However, extrinsic atoms Sb, Bi, and Y could play a crucial role in regulating the holes concentration of GeTe because of their relatively high solubility. Here we investigate the thermoelectric performance of the GeTe upon Sb doping, and demonstrate a high maximum zT value up to 1.88 could be achieved in Ge 0.90 Sb 0.10 Te as a result of the significant suppression in thermal conductivity while holding a high power factor. Where the maintained high power factor is due to the markable enhancement in S , which could be attributed to the significant suppression of holes concentration and the valence band convergence upon Sb doping; while the low thermal conductivity stems from the suppression of electronic thermal conductivity due to the increase in electrical resistivity and the lowering of lattice thermal conductivity through strengthening the phonons scattering by the lattice distortion, dislocations, and twin boundaries. Aside from the excellent thermoelectric performance, Ge 0.90 Sb 0.10 Te also shows good reproducibility, as well as thermal stability. This work confirms the Ge 0.90 Sb 0.10 Te is a superior thermoelectric material for practical application.

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