Synthesis and Characterization of Nanocrystalline FeSb<sub>2</sub> for Thermoelectric Applications

Datta, Anuja; Nolas, George S.

doi:10.1002/ejic.201100864

Cited by 16 publications

(15 citation statements)

References 31 publications

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“…Datta et al also developed phase-pure FeSb 2 nanocrystals with an average size of 40 nm (Fig. 5e) through an ethanol-mediated, low-temperature solvothermal process [93]. Without a template or capping chemical used in the process, these nanocrystals grew in their inherent orthorhombic symmetry.…”

Section: Hydrothermal/solvothermal Synthesismentioning

confidence: 99%

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Bottom-Up Engineering Strategies for High-Performance Thermoelectric Materials

Zhu

Wang

et al. 2021

Nano-Micro Lett.

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The recent advancements in thermoelectric materials are largely credited to two factors, namely established physical theories and advanced materials engineering methods. The developments in the physical theories have come a long way from the “phonon glass electron crystal” paradigm to the more recent band convergence and nanostructuring, which consequently results in drastic improvement in the thermoelectric figure of merit value. On the other hand, the progresses in materials fabrication methods and processing technologies have enabled the discovery of new physical mechanisms, hence further facilitating the emergence of high-performance thermoelectric materials. In recent years, many comprehensive review articles are focused on various aspects of thermoelectrics ranging from thermoelectric materials, physical mechanisms and materials process techniques in particular with emphasis on solid state reactions. While bottom-up approaches to obtain thermoelectric materials have widely been employed in thermoelectrics, comprehensive reviews on summarizing such methods are still rare. In this review, we will outline a variety of bottom-up strategies for preparing high-performance thermoelectric materials. In addition, state-of-art, challenges and future opportunities in this domain will be commented.

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Section: Hydrothermal/solvothermal Synthesismentioning

confidence: 99%

“…The inset shows an SEM image of a fractured surface of the densified FeSb 2 specimen. Adapted with permission from Refs [91][92][93].…”

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confidence: 99%

Bottom-Up Engineering Strategies for High-Performance Thermoelectric Materials

Zhu

Wang

et al. 2021

Nano-Micro Lett.

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“…Nanomaterials may also display enhanced S when correctly designed and precisely engineered. In this scenario, processing of thermoelectric nanomaterials by bottom-up assembly of colloidal NCs is particularly interesting [ 5 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. Colloidal NCs with controlled size, shape, crystallographic phase and composition are ideal building blocks to produce nanostructured materials with well-tuned parameters [ 15 , 16 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Bottom up Assembly and Thermoelectric Properties of Sb-Doped PbS Nanocrystal Building Blocks

et al. 2021

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The precise engineering of thermoelectric materials using nanocrystals as their building blocks has proven to be an excellent strategy to increase energy conversion efficiency. Here we present a synthetic route to produce Sb-doped PbS colloidal nanoparticles. These nanoparticles are then consolidated into nanocrystalline PbS:Sb using spark plasma sintering. We demonstrate that the introduction of Sb significantly influences the size, geometry, crystal lattice and especially the carrier concentration of PbS. The increase of charge carrier concentration achieved with the introduction of Sb translates into an increase of the electrical and thermal conductivities and a decrease of the Seebeck coefficient. Overall, PbS:Sb nanomaterial were characterized by two-fold higher thermoelectric figures of merit than undoped PbS.

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“…15 Topological semiconductors with these two physical characteristics have long been expected to become candidates for use in low-temperature thermoelectric applications. 16,17 In recent years, the κ value of FeSb 2 has been greatly suppressed by introducing nanostructure, [18][19][20][21] nanoinclusions, 22,23 and dopants such as Co/ Cr, 24 Te, 17 Sn, 25 Mn, 26 Ni, 27 and Cu. 28 However, the resulting improvements of ZT in these reports have been unsatisfactory due to the decrease in S; the reported thermoelectric properties of FeSb 2 are collated in Table II 29,30 Unfortunately, the reduced σ value limited the enhancement of ZT.…”

Section: Introductionmentioning

confidence: 99%

High Thermoelectric Figure of Merit of FeSb2−x Thin Films via Defect Engineering for Low-Temperature Cooling Applications

Yang

Nkemeni

et al. 2021

J. Electron. Mater.

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In general, both the thermal and electrical conductivity of metal/metalloid/semimetal materials decrease with increasing temperature; that is, these two parameters are in lockstep. Defect engineering has recently been proven to have tremendous potential for improving the thermoelectric performance of topological materials with two-dimensional layered structures. We have explored the effect of Sb point-defect engineering on the thermoelectric performance of FeSb 2−x (x = 0, 0.1, 0.2, and 0.3) thin films at low temperatures. Thin-film surface and grain-boundary phonon scattering contribute to the overall decrease in the thermal conductivity (κ) compared with single crystals. The current results indicate that FeSb 1.8 shows the lowest κ value, the main reason being that its nanostructure scatters more phonons over a wider wavelength range. In addition, the presence of Sb point defects enables an enhancement of the Seebeck coefficient (S) to 357 μV/K at 45 K for FeSb 1.8 thin films, coupled with an imperceptible decrease in the corresponding electrical conductivity (σ). Despite these results, the power factor (PF) is much lower than that of single crystals. The optimal peak thermoelectric figure of merit (ZT) of ~ 0.071 at 55 K is one order of magnitude higher than the ZT max of low-temperature FeSb 2 single crystals. These characteristics indicate that FeSb 2 thin films are promising materials for use in low-temperature thermoelectric devices.

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Synthesis and Characterization of Nanocrystalline FeSb₂ for Thermoelectric Applications

Cited by 16 publications

References 31 publications

Bottom-Up Engineering Strategies for High-Performance Thermoelectric Materials

Bottom-Up Engineering Strategies for High-Performance Thermoelectric Materials

Synthesis, Bottom up Assembly and Thermoelectric Properties of Sb-Doped PbS Nanocrystal Building Blocks

High Thermoelectric Figure of Merit of FeSb2−x Thin Films via Defect Engineering for Low-Temperature Cooling Applications

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Synthesis and Characterization of Nanocrystalline FeSb2 for Thermoelectric Applications

Cited by 16 publications

References 31 publications

Bottom-Up Engineering Strategies for High-Performance Thermoelectric Materials

Bottom-Up Engineering Strategies for High-Performance Thermoelectric Materials

Synthesis, Bottom up Assembly and Thermoelectric Properties of Sb-Doped PbS Nanocrystal Building Blocks

High Thermoelectric Figure of Merit of FeSb2−x Thin Films via Defect Engineering for Low-Temperature Cooling Applications

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Synthesis and Characterization of Nanocrystalline FeSb₂ for Thermoelectric Applications