Enhanced Thermoelectric Performance in PbTe-PbS Nanocomposites

Yu Zhao; Deepam Maurya; Andrew Miner; Giti A. Khodaparast; Shashank Priya

doi:10.1515/ehs-2015-0004

Enhanced Thermoelectric Performance in PbTe-PbS Nanocomposites

Yu Zhao
, Deepam Maurya
, Andrew Miner
, Giti A. Khodaparast
, Shashank Priya

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

In this study, we investigate the changes occurring in the microstructure and thermoelectric properties of PbTe_0.9S_0.1 alloy (PbTe-PbS) under varying thermal treatment conditions. Transmission electron microscopy (TEM) studies were utilized to reveal the distribution of nano-precipitates in the annealed alloy. PbTe_0.9S_0.1 alloy with PbS phase precipitates displayed a significant reduction in the thermal conductivity and an enhancement in the Seebeck coefficient. The 47% reduction in lattice thermal conductivity at the measurement temperature of 300°C in the alloy annealed at 400°C was attributed to the phonon scattering occurring due to the presence of nano-precipitates. The annealed alloy displayed higher electrical conductivity at room temperature than that of the alloy without annealing. The maximum figure of merit, ZT, was found to be 0.76 at 300°C in the alloy annealed at 400°C.

Original language	English (US)
Pages (from-to)	55-62
Number of pages	8
Journal	Energy Harvesting and Systems
Volume	2
Issue number	1-2
DOIs	https://doi.org/10.1515/ehs-2015-0004
State	Published - Jun 1 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2015 Walter de Gruyter GmbH. All rights reserved.

Keywords

electrical property
nano-precipitates
thermal conductivity
thermoelectric

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10.1515/ehs-2015-0004

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title = "Enhanced Thermoelectric Performance in PbTe-PbS Nanocomposites",

abstract = "In this study, we investigate the changes occurring in the microstructure and thermoelectric properties of PbTe0.9S0.1 alloy (PbTe-PbS) under varying thermal treatment conditions. Transmission electron microscopy (TEM) studies were utilized to reveal the distribution of nano-precipitates in the annealed alloy. PbTe0.9S0.1 alloy with PbS phase precipitates displayed a significant reduction in the thermal conductivity and an enhancement in the Seebeck coefficient. The 47\% reduction in lattice thermal conductivity at the measurement temperature of 300°C in the alloy annealed at 400°C was attributed to the phonon scattering occurring due to the presence of nano-precipitates. The annealed alloy displayed higher electrical conductivity at room temperature than that of the alloy without annealing. The maximum figure of merit, ZT, was found to be 0.76 at 300°C in the alloy annealed at 400°C.",

keywords = "electrical property, nano-precipitates, thermal conductivity, thermoelectric",

author = "Yu Zhao and Deepam Maurya and Andrew Miner and Khodaparast, \{Giti A.\} and Shashank Priya",

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T1 - Enhanced Thermoelectric Performance in PbTe-PbS Nanocomposites

AU - Zhao, Yu

AU - Maurya, Deepam

AU - Miner, Andrew

AU - Khodaparast, Giti A.

AU - Priya, Shashank

PY - 2015/6/1

Y1 - 2015/6/1

N2 - In this study, we investigate the changes occurring in the microstructure and thermoelectric properties of PbTe0.9S0.1 alloy (PbTe-PbS) under varying thermal treatment conditions. Transmission electron microscopy (TEM) studies were utilized to reveal the distribution of nano-precipitates in the annealed alloy. PbTe0.9S0.1 alloy with PbS phase precipitates displayed a significant reduction in the thermal conductivity and an enhancement in the Seebeck coefficient. The 47% reduction in lattice thermal conductivity at the measurement temperature of 300°C in the alloy annealed at 400°C was attributed to the phonon scattering occurring due to the presence of nano-precipitates. The annealed alloy displayed higher electrical conductivity at room temperature than that of the alloy without annealing. The maximum figure of merit, ZT, was found to be 0.76 at 300°C in the alloy annealed at 400°C.

AB - In this study, we investigate the changes occurring in the microstructure and thermoelectric properties of PbTe0.9S0.1 alloy (PbTe-PbS) under varying thermal treatment conditions. Transmission electron microscopy (TEM) studies were utilized to reveal the distribution of nano-precipitates in the annealed alloy. PbTe0.9S0.1 alloy with PbS phase precipitates displayed a significant reduction in the thermal conductivity and an enhancement in the Seebeck coefficient. The 47% reduction in lattice thermal conductivity at the measurement temperature of 300°C in the alloy annealed at 400°C was attributed to the phonon scattering occurring due to the presence of nano-precipitates. The annealed alloy displayed higher electrical conductivity at room temperature than that of the alloy without annealing. The maximum figure of merit, ZT, was found to be 0.76 at 300°C in the alloy annealed at 400°C.

KW - electrical property

KW - nano-precipitates

KW - thermal conductivity

KW - thermoelectric

UR - https://www.scopus.com/pages/publications/84979029405

UR - https://www.scopus.com/pages/publications/84979029405#tab=citedBy

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DO - 10.1515/ehs-2015-0004

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JO - Energy Harvesting and Systems

JF - Energy Harvesting and Systems

IS - 1-2

ER -

Enhanced Thermoelectric Performance in PbTe-PbS Nanocomposites

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