Structural properties of thermoelectric CoSb3 skutterudite thin films prepared by molecular beam deposition

Daniel, M.; Brombacher, Christoph; Beddies, G.; Jöhrmann, Nathanael; Hietschold, Michael; Johnson, David C.; Aabdin, Zainul; Peranio, N.; Eibl, O.; Albrecht, Manfred

doi:10.1016/j.jallcom.2014.11.057

Cited by 26 publications

(35 citation statements)

References 26 publications

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“…A mean grain size of 1.3 µm could be extracted from these images. This value is in the same range as the grain size found for annealed CoSb 3 thin films 8 .…”

Section: (B)supporting

confidence: 78%

“…This effect becomes stronger for Sb rich samples and can be attributed mainly to better crystallinity by less Sb interstitials and Sb evaporation resulting in a relaxation towards the smaller equilibrium lattice constant of stoichiometic FeSb 3 films as also observed for Sb rich CoSb 3 films 8,31 . Thus this equilibrium lattice constant a (neglecting stress) can be determined from XRD measurements of single phase FeSb 3 films with (nearly) stoichiometric Sb content after annealing at 300 • C. Therefore a XRD (θ/2Θ) scan of an annealed FeSb 3 film with a Sb content of 76 at.% was analyzed by performing a Rietveld refinement shown in fig.…”

Section: Structural Properties Of Fe-sb Thin Filmsmentioning

confidence: 60%

“…By subtracting the second curve from the first one, irreversible events can be extracted. Details of the measurement procedure are given elsewhere 8 .…”

Section: B Structural Characterizationmentioning

confidence: 99%

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Structural and thermoelectric properties ofFeSb3skutterudite thin films

et al. 2015

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Skutterudites are promising materials for future thermoelectric applications. Whereas the skutterudite CoSb 3 is intensively studied, nearly no investigations for FeSb 3 are performed due to its metastable character and the comparably low decomposition temperature.In this work, single phase FeSb 3 thin films were prepared by co-deposition of Fe and Sb using molecular beam epitaxy at room temperature followed by post-annealing. The transport properties of a Fe-Sb composition series were determined and reveal high power factors S 2 σ up to 14 µW/K 2 cm. Furthermore, the structural parameters, the electronic structure and the transport parameters were calculated by density functional theory giving excellent agreement to the experimental data.

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“…A mean grain size of 1.3 µm could be extracted from these images. This value is in the same range as the grain size found for annealed CoSb 3 thin films 8 .…”

Section: (B)supporting

confidence: 78%

Section: Structural Properties Of Fe-sb Thin Filmsmentioning

confidence: 60%

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Structural and thermoelectric properties ofFeSb3skutterudite thin films

et al. 2015

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“…Details of the preparation process can be found elsewhere [16]. The asdeposited films are amorphous, thus the wafer samples were broken in several pieces and postannealed in ultra-high vacuum (UHV) to achieve crystalline skutterudite films.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…For instance, frequently performed heating cycles and rapid temperature changes around the typical working temperatures can result in strain, thermal fatigue, and cracks, as well as compositional changes or even decomposition, which in turn will lower the ZT values. In a previous study, we have shown that an excess of Sb is necessary for the preparation of single phase CoSb 3 skutterudite thin films by molecular beam epitaxy (MBE) at room temperature followed by postannealing [16]. One major difficulty in the preparation of these films is the evaporation of Sb from the film sample during the annealing process, which will change the charge carrier concentration and thus the thermoelectric transport coefficients.…”

Section: Introductionmentioning

confidence: 99%

Thermal stability of thermoelectric CoSb3 skutterudite thin films

et al. 2015

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Fast Fabrication of High‐Performance CoSb₃‐Based Thermoelectric Skutterudites via One‐Step Yb‐Promoted Peritectic Solidification

Shi

Feng

et al. 2023

Adv Funct Materials

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As a most promising mid‐temperature thermoelectric material, CoSb3‐based bulk material exhibits an applicable figure‐of‐merit (ZT) of more than one. However, their fabrication is historically time‐consuming due to the long‐time solid‐state phase transitions from CoSb2 to CoSb3. To overcome this challenge, here, a fast one‐step process is developed to fabricate n‐type Yb‐doped CoSb3 with stable ZT of 1.12 at 765 K in <5 h. Experiments confirm Yb promotes peritectic reactions of CoSb + Liquid → CoSb2 and CoSb2 + Liquid → CoSb3, optimizes power factor, and suppresses thermal conductivity. Moreover, the dense grains, induced by the one‐step crystallization, result in outstanding mechanical properties with a Young's modulus of 171.4 GPa and a hardness of 8.8 GPa in the Yb‐doped CoSb3. This study indicates that the fast one‐step fabrication route can effectively promote the practical applications of CoSb3‐based thermoelectrics and provide guidance for thermoelectric fabrication via rational phase design.

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Structural properties of thermoelectric CoSb3 skutterudite thin films prepared by molecular beam deposition

Cited by 26 publications

References 26 publications

Structural and thermoelectric properties ofFeSb3skutterudite thin films

Structural and thermoelectric properties ofFeSb3skutterudite thin films

Thermal stability of thermoelectric CoSb3 skutterudite thin films

Fast Fabrication of High‐Performance CoSb₃‐Based Thermoelectric Skutterudites via One‐Step Yb‐Promoted Peritectic Solidification

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Structural properties of thermoelectric CoSb3 skutterudite thin films prepared by molecular beam deposition

Cited by 26 publications

References 26 publications

Structural and thermoelectric properties ofFeSb3skutterudite thin films

Structural and thermoelectric properties ofFeSb3skutterudite thin films

Thermal stability of thermoelectric CoSb3 skutterudite thin films

Fast Fabrication of High‐Performance CoSb3‐Based Thermoelectric Skutterudites via One‐Step Yb‐Promoted Peritectic Solidification

Contact Info

Product

Resources

About

Fast Fabrication of High‐Performance CoSb₃‐Based Thermoelectric Skutterudites via One‐Step Yb‐Promoted Peritectic Solidification