An approach of enhancing thermoelectric performance for p-type PbS: Decreasing electronic thermal conductivity

CdTe alloying dramatically enhanced the thermoelectric performance of p-type PbSe by enhancing Seebeck coefficients and reducing electronic thermal conductivity.

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Significantly enhanced thermoelectric performance of Cu-doped p-type Bi0.5Sb1.5Te3 by a hydrothermal synthesis method

RSC Advances ◽

10.1039/c7ra06277j ◽

2017 ◽

Vol 7 (65) ◽

pp. 41111-41116 ◽

Cited By ~ 6

Author(s):

Zichen Wei ◽

Chenyang Wang ◽

Li You ◽

Shijie Zhao ◽

Kang Yang ◽

...

Keyword(s):

Thermal Conductivity ◽

Electrical Conductivity ◽

Hydrothermal Synthesis ◽

Hydrothermal Method ◽

Synthesis Method ◽

Thermoelectric Performance ◽

P Type

Increased electrical conductivity and decreased thermal conductivity were achieved simultaneously in the Cu-doped Bi0.5Sb1.5Te3 synthesized by a hydrothermal method.

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A High Thermoelectric Performance ZT in p-Type LaSe2 Crystal

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.871.203 ◽

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 .

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Large reduction of thermal conductivity leading to enhanced thermoelectric performance in p-type Mg3Bi2–YbMg2Bi2 solid solutions

Journal of Materials Chemistry C ◽

10.1039/c8tc05424j ◽

2019 ◽

Vol 7 (2) ◽

pp. 434-440 ◽

Cited By ~ 12

Author(s):

Ting Zhou ◽

Jun Mao ◽

Jing Jiang ◽

Shaowei Song ◽

Hangtian Zhu ◽

...

Keyword(s):

Thermal Conductivity ◽

Solid Solution ◽

Thermoelectric Property ◽

Solid Solutions ◽

Thermoelectric Performance ◽

Large Reduction ◽

P Type

The thermoelectric property of YbMg2Bi2–Mg3Bi2 solid solution is studied.

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Thickness-Dependent In-Plane Thermal Conductivity and Enhanced Thermoelectric Performance in p-Type ZrTe5 Nanoribbons

physica status solidi (RRL) - Rapid Research Letters ◽

10.1002/pssr.201800529 ◽

2018 ◽

Vol 13 (3) ◽

pp. 1800529 ◽

Cited By ~ 7

Author(s):

Jie Guo ◽

Yuan Huang ◽

Xiangshui Wu ◽

Qilang Wang ◽

Xingjiang Zhou ◽

...

Keyword(s):

Thermal Conductivity ◽

Thermoelectric Performance ◽

P Type

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Sb deficiencies control hole transport and boost the thermoelectric performance of p-type AgSbSe2

Journal of Materials Chemistry C ◽

10.1039/c5tc01429h ◽

2015 ◽

Vol 3 (40) ◽

pp. 10415-10421 ◽

Cited By ~ 11

Author(s):

Satya N. Guin ◽

Kanishka Biswas

Keyword(s):

Thermal Conductivity ◽

Electrical Conductivity ◽

Carrier Transport ◽

Hole Transport ◽

Thermoelectric Performance ◽

Low Thermal Conductivity ◽

New Strategy ◽

P Type

We demonstrate a new strategy to control the carrier transport in AgSbSe2by introducing Sb deficiencies. Enhanced electrical conductivity and ultra-low thermal conductivity resulted a peak ZT value ∼1 at 610 K in Sb deficient AgSbSe2.

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Electronic Thermal Conductivity and Thermoelectric Performance of PbBi4Te7

VNU Journal of Science Mathematics - Physics ◽

10.25073/2588-1124/vnumap.4472 ◽

2020 ◽

Vol 36 (3) ◽

Author(s):

Tran Van Quang

Keyword(s):

Thermal Conductivity ◽

Carrier Concentration ◽

Bismuth Telluride ◽

Density Functional ◽

Binary Compound ◽

Thermoelectric Performance ◽

Boltzmann Transport ◽

Relaxation Time Approximation ◽

Electronic Thermal Conductivity ◽

Constant Relaxation Time

Bismuth telluride and its related compounds are the state-of-the-art thermoelectric materials operating at room temperature. Bismuth telluride with Pb substituted, PbBi4Te7, has been found to be a new quasi-binary compound with an impressive high power factor. In this work, in the framework of density functional theory, we study the electronic thermal conductivity of the compound by employing the solution of Boltzmann Transport Equation in a constant relaxation-time approximation. The results show that the electronic thermal conductivity drastically increases with the increase of temperature and carrier concentration which have a detrimental effect on the thermoelectric performance. At a particular temperature, the competition between the thermal conductivity, the Seebeck coefficient and the electrical conductivity limits the thermoelectric figure of merit, ZT. The maximum ZT value of about 0.47 occurs at 520 K and at the carrier concentration of 5.0×1019cm-3 for n-type doping. This suggests that to maximize the thermoelectric performance of the compound, the carrier concentration must be carefully controlled and optimized whereas the best operating temperature is around 500 K.

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Phonon Scattering and Suppression of Bipolar Effect in MgO/VO2 Nanoparticle Dispersed p-Type Bi0.5Sb1.5Te3 Composites

Materials ◽

10.3390/ma14102506 ◽

2021 ◽

Vol 14 (10) ◽

pp. 2506

Author(s):

Song Yi Back ◽

Jae Hyun Yun ◽

Hyunyong Cho ◽

Gareoung Kim ◽

Jong-Soo Rhyee

Keyword(s):

Thermal Conductivity ◽

Phonon Scattering ◽

Oxide Particle ◽

Critical Issue ◽

Thermoelectric Performance ◽

Phase Mixing ◽

Bulk Matrix ◽

Filtering Effect ◽

P Type ◽

Thermal Conductivities

Bismuth-Telluride-based compounds are unique materials for thermoelectric cooling applications. Because Bi2Te3 is a narrow gap semiconductor, the bipolar diffusion effect is a critical issue to enhance thermoelectric performance. Here, we report the significant reduction of thermal conductivity by decreasing lattice and bipolar thermal conductivity in extrinsic phase mixing of MgO and VO2 nanoparticles in Bi0.5Sb1.5Te3 (BST) bulk matrix. When we separate the thermal conductivity by electronic κel, lattice κlat, and bipolar κbi thermal conductivities, all the contributions in thermal conductivities are decreased with increasing the concentration of oxide particle distribution, indicating the effective phonon scattering with an asymmetric scattering of carriers. The reduction of thermal conductivity affects the improvement of the ZT values. Even though significant carrier filtering effect is not observed in the oxide bulk composites due to micro-meter size agglomeration of particles, the interface between oxide and bulk matrix scatters carriers giving rise to the increase of the Seebeck coefficient and electrical resistivity. Therefore, we suggest the extrinsic phase mixing of nanoparticles decreases lattice and bipolar thermal conductivity, resulting in the enhancement of thermoelectric performance over a wide temperature range.

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