Thermoelectric properties of Se-deficient and Pb-/Sn-codoped In4Pb0.01Sn0.03Se3− polycrystalline compounds

Kim, Jin Hee; Kim, Min Jae; Oh, Seungbae; Rhyee, Jong‐Soo

doi:10.1016/j.jallcom.2014.06.196

Cited by 27 publications

(18 citation statements)

References 24 publications

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“…Figure 19 shows the powder XRD pattern of the annealed In 4 Pb 0.01 Sn 0.03 Se 3− x ( x = 0.1, 0.2, 0.3, 0.4, and 0.5) polycrystalline compounds [43]. The patterns represent a single phase of In 4 Se 3 with no distinguishable impurity phases.…”

Section: Resultsmentioning

confidence: 99%

“…The inset shows the lattice parameters of the compounds. Reproduced with permission from Elsevier B.V., 2014 [43]. …”

Section: Resultsmentioning

confidence: 99%

“…The temperature dependent electrical resistivities ρ (T) of polycrystalline compounds In 4 Pb 0.01 Sn 0.03 Se 3− x ( x = 0.1, 0.2, 0.3, 0.4, and 0.5) [43] and In 4 Se 2.9 (open square for comparison [21]) are presented in Figure 20a. The ρ (T) of Pb-/Sn-codoped polycrystalline compound In 4 Pb 0.01 Sn 0.03 Se 2.9 is significantly decreased than the one of In 4 Se 2.9 .…”

Section: Resultsmentioning

confidence: 99%

“…Figure 20c shows the temperature dependent Lorenz number L [43]. The Lorenz numbers are very low compared with L 0 = 2.45 × 10 −8 W·Ω·K −2 .…”

Section: Resultsmentioning

confidence: 99%

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Chemical Potential Tuning and Enhancement of Thermoelectric Properties in Indium Selenides

Rhyee

Kim

2015

Materials

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Researchers have long been searching for the materials to enhance thermoelectric performance in terms of nano scale approach in order to realize phonon-glass-electron-crystal and quantum confinement effects. Peierls distortion can be a pathway to enhance thermoelectric figure-of-merit ZT by employing natural nano-wire-like electronic and thermal transport. The phonon-softening known as Kohn anomaly, and Peierls lattice distortion decrease phonon energy and increase phonon scattering, respectively, and, as a result, they lower thermal conductivity. The quasi-one-dimensional electrical transport from anisotropic band structure ensures high Seebeck coefficient in Indium Selenide. The routes for high ZT materials development of In4Se3−δ are discussed from quasi-one-dimensional property and electronic band structure calculation to materials synthesis, crystal growth, and their thermoelectric properties investigations. The thermoelectric properties of In4Se3−δ can be enhanced by electron doping, as suggested from the Boltzmann transport calculation. Regarding the enhancement of chemical potential, the chlorine doped In4Se3−δCl0.03 compound exhibits high ZT over a wide temperature range and shows state-of-the-art thermoelectric performance of ZT = 1.53 at 450 °C as an n-type material. It was proven that multiple elements doping can enhance chemical potential further. Here, we discuss the recent progress on the enhancement of thermoelectric properties in Indium Selenides by increasing chemical potential.

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Section: Resultsmentioning

confidence: 99%

“…The inset shows the lattice parameters of the compounds. Reproduced with permission from Elsevier B.V., 2014 [43]. …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Figure 20c shows the temperature dependent Lorenz number L [43]. The Lorenz numbers are very low compared with L 0 = 2.45 × 10 −8 W·Ω·K −2 .…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Chemical Potential Tuning and Enhancement of Thermoelectric Properties in Indium Selenides

Rhyee

Kim

2015

Materials

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“…In some correlated metals and degenerated semiconductors, the Lorenz number is not constant, and therefore we calculate the Lorenz number by the Fermi integral formula. 24 The calculation result of the Lorenz number by the Fermi integral formula is shown in the inset of Fig. 3(d).…”

Section: Resultsmentioning

confidence: 99%

Thermoelectric properties of p-type PbTe/Ag2Te bulk composites by extrinsic phase mixing

Lee

Rhyee

2015

AIP Advances

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We investigated the thermoelectric properties of PbTe/Ag2Te bulk composites, synthesized by hand milling, mixing, and hot press sintering. From x-ray diffraction and energy dispersive x-ray spectroscopy measurements, we observed Ag2Te phase separation in the PbTe matrix without Ag atom diffusion. In comparison with previously reported pseudo-binary (PbTe)1−x(Ag2Te)x composites, synthesized by high temperature phase separation, the PbTe/Ag2Te bulk composites fabricated with a low temperature phase mixing process give rise to p-type conduction of carriers with significantly decreased electrical conductivity. This indicates that Ag atom diffusion in the PbTe matrix changes the sign of the Seebeck coefficient to n-type and also increases the carrier concentration. Effective p-type doping with low temperature phase separation by mixing and hot press sintering can enhance the thermoelectric performance of PbTe/Ag2Te bulk composites, which can be used as a p-type counterpart of n-type (PbTe)1−x(Ag2Te)x bulk composites.

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Thermoelectric Enhancement of Different Kinds of Metal Chalcogenides

Han

Sun

et al. 2016

Advanced Energy Materials

173

114

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Due to the urgency of our energy and environmental issues, a variety of cost-effective and pollution-free technologies have attracted considerable attention, among which thermoelectric technology has made enormous progress. Substantial numbers of new thermoelectric materials are created with high figure of merit (ZT) by using advanced nanoscience and nanotechnology. This is especially true in the case of metalchalcogenide-based materials, which possess both relatively high ZT and low cost among all the different kinds of thermoelectric materials. Here, comprehensive coverage of recent advances in metal chalcogenides and their correlated thermoelectric enhancement mechanisms are provided. Several new strategies are summarized with the hope that they can inspire further enhancement of performance, both in metal chalcogenides and in other materials. Disciplines Engineering | Physical Sciences and Mathematics Publication DetailsHan, C., Sun, Q., Li, Z. & Dou, S. X. (2016) Several new strategies are summarized with the hope that they can inspire further enhancement of performance, both in metal chalcogenides and in other materials.2

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Thermoelectric properties of Se-deficient and Pb-/Sn-codoped In4Pb0.01Sn0.03Se3− polycrystalline compounds

Cited by 27 publications

References 24 publications

Chemical Potential Tuning and Enhancement of Thermoelectric Properties in Indium Selenides

Chemical Potential Tuning and Enhancement of Thermoelectric Properties in Indium Selenides

Thermoelectric properties of p-type PbTe/Ag2Te bulk composites by extrinsic phase mixing

Thermoelectric Enhancement of Different Kinds of Metal Chalcogenides

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