scholarly journals Enhancing thermoelectric properties of a p-type Mg3Sb2- based Zintl phase compound by Pb substitution in the anionic framework

RSC Advances ◽  
2014 ◽  
Vol 4 (65) ◽  
pp. 34552-34560 ◽  
Author(s):  
A. Bhardwaj ◽  
D. K. Misra
Keyword(s):  
Thermal Conductivity ◽  
Bismuth Telluride ◽  
Power Factor ◽  
Anionic Site ◽  
Zintl Phase ◽  
Phase Compound ◽  
Industrial Materials ◽  
P Type ◽  
Pb Substitution ◽  
Anionic Framework

Pb substitution on anionic site of Mg3Sb2 structure enhances the power factor and simultaneously reduces the thermal conductivity which leads to a ZT ≈ 0.84 at 773 K for Mg3Sb1.8Pb0.2 alloy. The enhanced ZT of this system is comparable to bismuth telluride and selenide industrial materials which are toxic and expensive.

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 .

Improving power factor and figure of merit of p-type CuSbSe2 via introducing Sb vacancies

2021 ◽  
Author(s):  
Tao Chen ◽  
Hongwei Ming ◽  
Xiaoying Qin ◽  
Chen Zhu ◽  
Lulu Huang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Material ◽  
Power Factor ◽  
Figure Of Merit ◽  
Environment Friendly ◽  
Low Thermal Conductivity ◽  
P Type

As a thermoelectric material, p-type CuSbSe2 has attracted much attention due to its intrinsic low thermal conductivity and environment-friendly constituents. In this work, Sb deficient compounds CuSb1-xSe2 (x=0-0.12) are prepared...

Enhancement of thermoelectric properties by Na doping in Te-free p-type AgSbSe2

2015 ◽  
Vol 44 (3) ◽  
pp. 1046-1051 ◽  
Author(s):  
Songting Cai ◽  
Zihang Liu ◽  
Jianyong Sun ◽  
Rui Li ◽  
Weidong Fei ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carrier Concentration ◽  
Thermoelectric Properties ◽  
Point Defects ◽  
Power Factor ◽  
Stacking Faults ◽  
Na Doping ◽  
P Type

Na substituting Sb in the AgSbSe2 not only improves the power factor caused by the enhanced carrier concentration, but also decreases the thermal conductivity due to point defects, nanoscale stacking faults and Na-rich precipitate. Consequently, a high ZT value of 0.92 is achieved in the AgSb0.99Na0.01Se2 sample.

scholarly journals Nanowire forest of pnictogen–chalcogenide alloys for thermoelectricity

Nanoscale ◽  
2019 ◽  
Vol 11 (28) ◽  
pp. 13423-13430
Author(s):  
Dhruv Singhal ◽  
Jessy Paterson ◽  
Meriam Ben-Khedim ◽  
Dimitri Tainoff ◽  
Laurent Cagnon ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Bismuth Telluride ◽  
Chalcogenide Alloys ◽  
P Type

Reduced thermal conductivity measured over a dense nanowire forest of n- and p-type alloys of bismuth telluride.

Ultra low thermal conductivity of disordered layered p-type bismuth telluride

2013 ◽  
Vol 1 (12) ◽  
pp. 2362 ◽  
Author(s):  
Salvatore Grasso ◽  
Naohito Tsujii ◽  
Qinghui Jiang ◽  
Jibran Khaliq ◽  
Satofumi Maruyama ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Bismuth Telluride ◽  
Low Thermal Conductivity ◽  
P Type

scholarly journals Simultaneous improvement of power factor and thermal conductivity via Ag doping in p-type Mg3Sb2 thermoelectric materials

2017 ◽  
Vol 5 (10) ◽  
pp. 4932-4939 ◽  
Author(s):  
Lirong Song ◽  
Jiawei Zhang ◽  
Bo B. Iversen
Keyword(s):  
Thermal Conductivity ◽  
Power Factor ◽  
Thermoelectric Materials ◽  
Figure Of Merit ◽  
Ag Doping ◽  
P Type ◽  
Average Figure

Ag doping in Mg3Sb2 leads to an enhanced average figure-of-merit (zT) by simultaneously improving the power factor and thermal conductivity.

scholarly journals Phase Formation Behavior and Thermoelectric Transport Properties of P-Type YbxFe3CoSb12 Prepared by Melt Spinning and Spark Plasma Sintering

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 87 ◽  
Author(s):  
Kyu Hyoung Lee ◽  
Sang Hyun Bae ◽  
Soon-Mok Choi
Keyword(s):  
Thermal Conductivity ◽  
Power Factor ◽  
Melt Spinning ◽  
Carrier Transport ◽  
Phonon Scattering ◽  
Submicron Scale ◽  
Formation Behavior ◽  
Thermoelectric Transport Properties ◽  
Spinning Process ◽  
P Type

Formation of multiple phases is considered an effective approach for enhancing the performance of thermoelectric materials since it can reduce the thermal conductivity and improve the power factor. Herein, we report the in-situ generation of a submicron-scale (~500 nm) heterograin structure in p-type Yb-filled (Fe,Co)4Sb12 skutterudites during the melt spinning process. Mixed grains of YbxFe3−yCo1+ySb12 and YbzFe3+yCo1−ySb12 were formed in melt spun ribbons due to uneven distribution of cations. By the formation of interfaces between two different grains, the power factor was enhanced due to the formation of an energy barrier for carrier transport, and simultaneously the lattice thermal conductivity was reduced due to the intensified boundary phonon scattering. A high thermoelectric figure of merit zT of 0.66 was obtained at 700 K.

Band engineered p-type RGO–CdS–PANI ternary nanocomposites for thermoelectric applications

2017 ◽  
Vol 1 (8) ◽  
pp. 1766-1773 ◽  
Author(s):  
Priyesh V. More ◽  
Chaitanya Hiragond ◽  
Abhijit Dey ◽  
Pawan K. Khanna
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Power Factor ◽  
Cds Qds ◽  
P Type

The presence of CdS QDs enhances the electrical conductivity and power factor but considerably lowers the thermal conductivity of the nanocomposite. The present RGO/CdS QDs/PANI nanocomposite restricts phonons but permits electrical charges making it a thermally disconnected but electrically connected material for efficient thermoelectric applications.

Fabrication and Thermoelectric Properties of p-Type Bi1Sb4Te7.5 Alloy Doped with Fe3O4

2006 ◽  
Vol 510-511 ◽  
pp. 1086-1089 ◽  
Author(s):  
Wang Kee Min ◽  
Chang Ho Lee ◽  
Yong Ho Park ◽  
Ik Min Park
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Mechanical Alloying ◽  
Seebeck Coefficient ◽  
Thermoelectric Properties ◽  
Power Factor ◽  
Hall Effect Measurement ◽  
Small Addition ◽  
Z Value ◽  
P Type

We investigated the effects of Fe3O4 (0~0.1 wt.%) on the thermoelectric properties of Bi1Sb4Te7.5 alloy prepared by mechanical alloying process. The Seebeck coefficient increased with Fe3O4 content, but the power factor decreased with Fe3O4 content because of the decreased electrical conductivity. The thermal conductivity decreased with Fe3O4. The carrier concentration measured by the Hall effect measurement decreased with Fe3O4. The thermal conductivity of 0.1 wt.% Fe3O4 alloy was 0.814 W/Km, 20%lower than that of Fe3O4 free alloy. As a result, the small addition of Fe3O4 improved the Z value owing to the decreased thermal conductivity by adding Fe3O4. The Z value of 0.01 wt.% Bi1Sb4Te7.5 alloy was 3.1×10-3 /K, the highest value among the prepared alloys.

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