Fabrication and thermoelectric properties of Pb1-y(Zn0.85Al0.15)yTe-Te (y = 0, 0.04, 0.06, 0.08, and 0.11) nanocomposites

Nagaraj Nandihalli, Yi Hsuan Pai, Chia Jyi Liu

Research output: Contribution to journalArticle

Abstract

A series of Pb1-y(Zn0.85Al0.15)yTe-Te nanocomposites (y = 0, 0.04, 0.06, 0.08, and 0.11) was fabricated by hydrothermal synthesis of PbTe and Zn0.85Al0.15Te nanoparticles separately, followed by intimate mixing, pressing, and sintering in evacuated-and-encapsulated Pyrex ampoules at 380 °C for 12 h. Thermoelectric properties were characterized from 120-600 K. With increasing Zn content, the peak thermopower shifts to higher temperatures, Hall carrier concentration increases, and the lattice thermal conductivity decreases. As compared to the pristine PbTe, thermoelectric properties of Pb1-y(Zn0.85Al0.15)yTe-Te nanocomposites have improved considerably. The y = 0.11 sample exhibits the highest zT ~1 comparable to the state-of-the-art p-type PbTe-based materials. The enhanced zT is ascribed to reduced thermal conductivity, elevated electrical conductivity and thermopower. This unique new method of material synthesis and doping is very promising to obtain high-performance thermoelectric materials in addition to tuning their nanostructures.

Original languageEnglish
JournalCeramics International
DOIs
Publication statusAccepted/In press - 2019 Jan 1

Fingerprint

Nanocomposites
Thermoelectric power
Fabrication
Thermal conductivity
Hydrothermal synthesis
Carrier concentration
Nanostructures
Sintering
Tuning
Doping (additives)
Nanoparticles
Temperature
Electric Conductivity

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

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title = "Fabrication and thermoelectric properties of Pb1-y(Zn0.85Al0.15)yTe-Te (y = 0, 0.04, 0.06, 0.08, and 0.11) nanocomposites",
abstract = "A series of Pb1-y(Zn0.85Al0.15)yTe-Te nanocomposites (y = 0, 0.04, 0.06, 0.08, and 0.11) was fabricated by hydrothermal synthesis of PbTe and Zn0.85Al0.15Te nanoparticles separately, followed by intimate mixing, pressing, and sintering in evacuated-and-encapsulated Pyrex ampoules at 380 °C for 12 h. Thermoelectric properties were characterized from 120-600 K. With increasing Zn content, the peak thermopower shifts to higher temperatures, Hall carrier concentration increases, and the lattice thermal conductivity decreases. As compared to the pristine PbTe, thermoelectric properties of Pb1-y(Zn0.85Al0.15)yTe-Te nanocomposites have improved considerably. The y = 0.11 sample exhibits the highest zT ~1 comparable to the state-of-the-art p-type PbTe-based materials. The enhanced zT is ascribed to reduced thermal conductivity, elevated electrical conductivity and thermopower. This unique new method of material synthesis and doping is very promising to obtain high-performance thermoelectric materials in addition to tuning their nanostructures.",
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Fabrication and thermoelectric properties of Pb1-y(Zn0.85Al0.15)yTe-Te (y = 0, 0.04, 0.06, 0.08, and 0.11) nanocomposites. / Nandihalli, Nagaraj; Pai, Yi Hsuan; Liu, Chia Jyi.

In: Ceramics International, 01.01.2019.

Research output: Contribution to journalArticle

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AB - A series of Pb1-y(Zn0.85Al0.15)yTe-Te nanocomposites (y = 0, 0.04, 0.06, 0.08, and 0.11) was fabricated by hydrothermal synthesis of PbTe and Zn0.85Al0.15Te nanoparticles separately, followed by intimate mixing, pressing, and sintering in evacuated-and-encapsulated Pyrex ampoules at 380 °C for 12 h. Thermoelectric properties were characterized from 120-600 K. With increasing Zn content, the peak thermopower shifts to higher temperatures, Hall carrier concentration increases, and the lattice thermal conductivity decreases. As compared to the pristine PbTe, thermoelectric properties of Pb1-y(Zn0.85Al0.15)yTe-Te nanocomposites have improved considerably. The y = 0.11 sample exhibits the highest zT ~1 comparable to the state-of-the-art p-type PbTe-based materials. The enhanced zT is ascribed to reduced thermal conductivity, elevated electrical conductivity and thermopower. This unique new method of material synthesis and doping is very promising to obtain high-performance thermoelectric materials in addition to tuning their nanostructures.

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