High thermoelectric figure of merit in heavy hole dominated PbTe

Yanzhong Pei; Aaron Lalonde; Shiho Iwanaga; G. Jeffrey Snyder

doi:10.1039/c0ee00456a

High thermoelectric figure of merit in heavy hole dominated PbTe

Yanzhong Pei, Aaron Lalonde, Shiho Iwanaga, G. Jeffrey Snyder

Materials Science and Engineering

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

661 Scopus citations

Abstract

Thermoelectric transport properties of p-type PbTe:Na, with high hole concentrations of approximately 10²⁰ cm^-3, are reinvestigated from room temperature to 750 K. The greatly enhanced Seebeck coefficient at these doping levels can be understood by the presence of a sharp increase in the density of states around the Fermi level. As a result, the thermoelectric figure of merit, zT, reaches ∼1.4 at 750 K. The influence of these heavy hole carriers may contribute to a similarly high zT observed in related p-type PbTe-based systems such as Tl-doped PbTe and nanostructured composite materials.

Original language	English (US)
Pages (from-to)	2085-2089
Number of pages	5
Journal	Energy and Environmental Science
Volume	4
Issue number	6
DOIs	https://doi.org/10.1039/c0ee00456a
State	Published - Jun 2011

ASJC Scopus subject areas

Environmental Chemistry
Renewable Energy, Sustainability and the Environment
Nuclear Energy and Engineering
Pollution

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10.1039/c0ee00456a

Cite this

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abstract = "Thermoelectric transport properties of p-type PbTe:Na, with high hole concentrations of approximately 1020 cm-3, are reinvestigated from room temperature to 750 K. The greatly enhanced Seebeck coefficient at these doping levels can be understood by the presence of a sharp increase in the density of states around the Fermi level. As a result, the thermoelectric figure of merit, zT, reaches ∼1.4 at 750 K. The influence of these heavy hole carriers may contribute to a similarly high zT observed in related p-type PbTe-based systems such as Tl-doped PbTe and nanostructured composite materials.",

author = "Yanzhong Pei and Aaron Lalonde and Shiho Iwanaga and Snyder, {G. Jeffrey}",

year = "2011",

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doi = "10.1039/c0ee00456a",

language = "English (US)",

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journal = "Energy and Environmental Science",

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AU - Pei, Yanzhong

AU - Lalonde, Aaron

AU - Iwanaga, Shiho

AU - Snyder, G. Jeffrey

PY - 2011/6

Y1 - 2011/6

N2 - Thermoelectric transport properties of p-type PbTe:Na, with high hole concentrations of approximately 1020 cm-3, are reinvestigated from room temperature to 750 K. The greatly enhanced Seebeck coefficient at these doping levels can be understood by the presence of a sharp increase in the density of states around the Fermi level. As a result, the thermoelectric figure of merit, zT, reaches ∼1.4 at 750 K. The influence of these heavy hole carriers may contribute to a similarly high zT observed in related p-type PbTe-based systems such as Tl-doped PbTe and nanostructured composite materials.

AB - Thermoelectric transport properties of p-type PbTe:Na, with high hole concentrations of approximately 1020 cm-3, are reinvestigated from room temperature to 750 K. The greatly enhanced Seebeck coefficient at these doping levels can be understood by the presence of a sharp increase in the density of states around the Fermi level. As a result, the thermoelectric figure of merit, zT, reaches ∼1.4 at 750 K. The influence of these heavy hole carriers may contribute to a similarly high zT observed in related p-type PbTe-based systems such as Tl-doped PbTe and nanostructured composite materials.

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High thermoelectric figure of merit in heavy hole dominated PbTe

Abstract

ASJC Scopus subject areas

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