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 | |
| Publication status | Published - 2018 Jan 1 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
Cite this
}
Enhanced thermoelectric performance of n-type PbTe doped with Na2Te. / Sie, Fong Ren; Liu, Hsin Jung; Kuo, Chia Hung; Hwang, Chii-Shyang; Chou, Ya Wen; Yeh, Chien Hsuan.
In: Intermetallics, Vol. 92, 01.01.2018, p. 113-118.Research output: Contribution to journal › Article
TY - JOUR
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
PY - 2018/1/1
Y1 - 2018/1/1
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.
UR - http://www.scopus.com/inward/record.url?scp=85030978604&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85030978604&partnerID=8YFLogxK
U2 - 10.1016/j.intermet.2017.09.018
DO - 10.1016/j.intermet.2017.09.018
M3 - Article
AN - SCOPUS:85030978604
VL - 92
SP - 113
EP - 118
JO - Intermetallics
JF - Intermetallics
SN - 0966-9795
ER -