Enhanced thermoelectric performance of n-type PbTe doped with Na2Te

Fong Ren Sie; Hsin Jung Liu; Chia Hung Kuo; Chii Shyang Hwang; Ya Wen Chou; Chien Hsuan Yeh

doi:10.1016/j.intermet.2017.09.018

Enhanced thermoelectric performance of n-type PbTe doped with Na₂Te

Fong Ren Sie, Hsin Jung Liu, Chia Hung Kuo, Chii Shyang Hwang, Ya Wen Chou, Chien Hsuan Yeh

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

10 Citations (Scopus)

Abstract

The n-type PbTe doped with Na₂Te (0.5–1.5 mol%) powders was prepared via planetary ball milling and then compacted via hot-pressed sintering at 773 K and 50 MPa. The effect of Na₂Te on the thermoelectric performance of PbTe was investigated. The results demonstrated that Na₂Te doping not only increased the lattice parameter, but also transformed the conduction type from p- to n-type. Moreover, Na⁺ was located at the interstitial sites of PbTe and generated excess electrons, increasing carrier concentration and electrical conductivity. The enhancement in the power factor of PbTe doped with Na₂Te samples was due to the higher Seebeck coefficient and electrical conductivity at a high measurement temperature. A maximum ZT value of 0.81 at 700 K was obtained for n-type PbTe doped with 1 mol% Na₂Te due primarily to a significant increase in the power factor and a reduction in thermal conductivity.

Original language	English
Pages (from-to)	113-118
Number of pages	6
Journal	Intermetallics
Volume	92
DOIs	https://doi.org/10.1016/j.intermet.2017.09.018
Publication status	Published - 2018 Jan

All Science Journal Classification (ASJC) codes

Chemistry(all)
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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@article{75bece0033244111a3c67e2eae73fdc5,

title = "Enhanced thermoelectric performance of n-type PbTe doped with Na2Te",

abstract = "The n-type PbTe doped with Na2Te (0.5–1.5 mol%) powders was prepared via planetary ball milling and then compacted via hot-pressed sintering at 773 K and 50 MPa. The effect of Na2Te on the thermoelectric performance of PbTe was investigated. The results demonstrated that Na2Te doping not only increased the lattice parameter, but also transformed the conduction type from p- to n-type. Moreover, Na+ was located at the interstitial sites of PbTe and generated excess electrons, increasing carrier concentration and electrical conductivity. The enhancement in the power factor of PbTe doped with Na2Te samples was due to the higher Seebeck coefficient and electrical conductivity at a high measurement temperature. A maximum ZT value of 0.81 at 700 K was obtained for n-type PbTe doped with 1 mol% Na2Te due primarily to a significant increase in the power factor and a reduction in thermal conductivity.",

author = "Sie, {Fong Ren} and Liu, {Hsin Jung} and Kuo, {Chia Hung} and Hwang, {Chii Shyang} and Chou, {Ya Wen} and Yeh, {Chien Hsuan}",

note = "Funding Information: The authors gratefully appreciate the financial support received for this work from the Ministry of Science and Technology of Taiwan , R.O.C., under grant MOST 103-2221-E-006-069-MY3 and the Bureau of Energy, Ministry of Economic Affairs , Taiwan, R.O.C.",

year = "2018",

month = jan,

doi = "10.1016/j.intermet.2017.09.018",

language = "English",

volume = "92",

pages = "113--118",

journal = "Intermetallics",

issn = "0966-9795",

publisher = "Elsevier Limited",

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T1 - Enhanced thermoelectric performance of n-type PbTe doped with Na2Te

AU - Sie, Fong Ren

AU - Liu, Hsin Jung

AU - Kuo, Chia Hung

AU - Hwang, Chii Shyang

AU - Chou, Ya Wen

AU - Yeh, Chien Hsuan

N1 - Funding Information: The authors gratefully appreciate the financial support received for this work from the Ministry of Science and Technology of Taiwan , R.O.C., under grant MOST 103-2221-E-006-069-MY3 and the Bureau of Energy, Ministry of Economic Affairs , Taiwan, R.O.C.

PY - 2018/1

Y1 - 2018/1

N2 - The n-type PbTe doped with Na2Te (0.5–1.5 mol%) powders was prepared via planetary ball milling and then compacted via hot-pressed sintering at 773 K and 50 MPa. The effect of Na2Te on the thermoelectric performance of PbTe was investigated. The results demonstrated that Na2Te doping not only increased the lattice parameter, but also transformed the conduction type from p- to n-type. Moreover, Na+ was located at the interstitial sites of PbTe and generated excess electrons, increasing carrier concentration and electrical conductivity. The enhancement in the power factor of PbTe doped with Na2Te samples was due to the higher Seebeck coefficient and electrical conductivity at a high measurement temperature. A maximum ZT value of 0.81 at 700 K was obtained for n-type PbTe doped with 1 mol% Na2Te due primarily to a significant increase in the power factor and a reduction in thermal conductivity.

AB - The n-type PbTe doped with Na2Te (0.5–1.5 mol%) powders was prepared via planetary ball milling and then compacted via hot-pressed sintering at 773 K and 50 MPa. The effect of Na2Te on the thermoelectric performance of PbTe was investigated. The results demonstrated that Na2Te doping not only increased the lattice parameter, but also transformed the conduction type from p- to n-type. Moreover, Na+ was located at the interstitial sites of PbTe and generated excess electrons, increasing carrier concentration and electrical conductivity. The enhancement in the power factor of PbTe doped with Na2Te samples was due to the higher Seebeck coefficient and electrical conductivity at a high measurement temperature. A maximum ZT value of 0.81 at 700 K was obtained for n-type PbTe doped with 1 mol% Na2Te due primarily to a significant increase in the power factor and a reduction in thermal conductivity.

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