Nanostructure, Excitations, and Thermoelectric Properties of Bi2Te3-Based Nanomaterials

Aabdin, Zainul; Peranio, N.; Eibl, O.; Töllner, William; Nielsch, Kornelius; Bessas, Dimitrios; Hermann, Raphaël P.; Winkler, Markus; König, Jan; Böttner, H.; Pacheco, V.; Schmidt, Jürgen; Hashibon, Adham; Elsässer, Christian

doi:10.1007/s11664-012-1997-6

Cited by 18 publications

(17 citation statements)

References 29 publications

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“…3(a). The adjacent fringes are measured to show a distance of 0.99 nm, which can be indexed to the typical quintuple layered structure of Bi 2 Te 3based, 20 further confirming the synthesis of expected samples by HPHT. In Fig.…”

Section: Xrd Patternssupporting

confidence: 63%

Effect of doping indium into a Bi₂Te₃ matrix on the microstructure and thermoelectric transport properties

Guo

Qin

et al. 2016

RSC Adv.

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Indium (In) as an unconventional doping element for Bi2Te3 is applied in this work to investigate the effect of In doping on the microstructure and thermoelectric transport properties of Bi2Te3-based alloys prepared via a unique high-pressure method (high pressure and high temperature, HPHT). The synthesis time of sample is sharply shortened comparing with conventional preparation methods. Doped In into Bi2Te3 martix can induce the multiple textures and microstructures, effectively scattering different frequency phonons. In the meantime, the electrical transport properties are also significantly modulated because of In atoms as electron donors. As a result, the lattice thermal conductivity and electrical resistivity are dramatically reduced, especially a decrease of 64-54% in 305-585K for lattice thermal conductivity of the samples with In content from 1 to 2 at.%. An acceptable ZT value of 0.65 at 385K is achieved from as-prepared Bi1.9In0.1Te3 bulk materials for In as a dopant in Bi2Te3 matrix.

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Section: Xrd Patternssupporting

confidence: 63%

Effect of doping indium into a Bi₂Te₃ matrix on the microstructure and thermoelectric transport properties

Guo

Qin

et al. 2016

RSC Adv.

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“…In summary, the nanoalloying method yields Bi 2 Te 3 and Sb 2 Te 3 thin films with good thermoelectric properties and stoichiometry control as fully discussed in Refs. .…”

Section: Thin Films Based On Bi2te3 Sb2te3 and Bi2te3/sb2te3 Superlamentioning

confidence: 99%

Nanostructure, thermoelectric properties, and transport theory of V₂VI₃ and V₂VI₃/IV–VI based superlattices and nanomaterials

Dankwort

Hansen

Winkler

et al. 2016

Physica Status Solidi (a)

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The scope of this work is to review the thermoelectric properties, the microstructures, and their correlation with theoretical calculations and predictions for recent chalcogenide based materials. The main focus is put on thin multilayered Bi2Te3, Sb2Te3 films, and bulk V2VI3/IV–VI mixed systems. For all films a systematic characterization of the thermoelectric properties as well as the micro‐ and nanostructure was performed. The degree of crystallinity of the multilayered films varied from epitaxial systems to polycrystalline films. Other multilayered thin films revealed promising thermoelectric properties. (SnSe)1.2TiSe2 thin films with rotational disorder yielded the highest Seebeck coefficient published to date for analogous materials. For bulk V2VI3/IV–VI mixed systems insides are given into a complete “material to module” process resulting in a high performance thermoelectric generator using (1–x)(GeTe) x(Bi2Se0.2Te2.8) (x = 0.038). Cyclic heating of this system with x = 0.063 resulted in a drastic change of the micro‐ and nanostructure observed by ex situ and in situ X‐ray diffraction (XRD) and transmission electron microscopy (TEM). Consequently a degradation of ZT at 450 °C from ∼2.0 to ∼1.0 was observed, while samples with x = 0.038 showed a stable ZT of 1.5.

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“…(iii) Bi 2 Te 3 materials have a layered rhombohedral crystal structure yielding a strong effect of texture on transport properties . Conventional and high‐energy X‐ray diffraction and electron diffraction in the TEM turned out to be of key importance to control the texture in nanowires , thin films , and nanostructured bulk .…”

Section: Introductionmentioning

confidence: 99%

“…(v) Scattering of phonons and, thus, reducing the lattice thermal conductivity by dimensionality and nanostructuring was achieved for Bi 2 Te 3 and CoSb 3 based nanomaterials. Lattice thermal conductivity could be decreased by artificially designed nanostructures, in particular, by growth of multilayered thin films , by reduction of grain sizes , by incorporation of inert nanoparticles in the matrix (this work), by alloying , by incorporation of point defects in Bi 2 Te 3 ‐based bulk materials and sputtered thin films , and by filling atoms in skutterudites‐type structures .…”

Section: Introductionmentioning

confidence: 99%

From thermoelectric bulk to nanomaterials: Current progress for Bi₂Te₃ and CoSb₃

Peranio

Eibl

Bäßler

et al. 2015

Physica Status Solidi (a)

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Bi2Te3 and CoSb3 based nanomaterials were synthesized and their thermoelectric, structural, and vibrational properties analyzed to assess and reduce ZT‐limiting mechanisms. The same preparation and/or characterization methods were applied in the different materials systems. Single‐crystalline, ternary p‐type Bi15Sb29Te56, and n‐type Bi38Te55Se7 nanowires with power factors comparable to nanostructured bulk materials were prepared by potential‐pulsed electrochemical deposition in a nanostructured Al2O3 matrix. p‐type Sb2Te3, n‐type Bi2Te3, and n‐type CoSb3 thin films were grown at room temperature using molecular beam epitaxy and were subsequently annealed at elevated temperatures. This yielded polycrystalline, single phase thin films with optimized charge carrier densities. In CoSb3 thin films the speed of sound could be reduced by filling the cage structure with Yb and alloying with Fe yielded p‐type material. Bi2(Te0.91Se0.09)3/SiC and (Bi0.26Sb0.74)2Te3/SiC nanocomposites with low thermal conductivities and ZT values larger than 1 were prepared by spark plasma sintering. Nanostructure, texture, chemical composition, as well as electronic and phononic excitations were investigated by X‐ray diffraction, nuclear resonance scattering, inelastic neutron scattering, Mössbauer spectroscopy, and transmission electron microscopy. For Bi2Te3 materials, ab‐initio calculations together with equilibrium and non‐equilibrium molecular dynamics simulations for point defects yielded their formation energies and their effect on lattice thermal conductivity, respectively. Current advances in thermoelectric Bi2Te3 and CoSb3 based nanomaterials are summarized. Advanced synthesis and characterization methods and theoretical modeling were combined to assess and reduce ZT‐limiting mechanisms in these materials.

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Nanostructure, Excitations, and Thermoelectric Properties of Bi2Te3-Based Nanomaterials

Cited by 18 publications

References 29 publications

Effect of doping indium into a Bi₂Te₃ matrix on the microstructure and thermoelectric transport properties

Effect of doping indium into a Bi₂Te₃ matrix on the microstructure and thermoelectric transport properties

Nanostructure, thermoelectric properties, and transport theory of V₂VI₃ and V₂VI₃/IV–VI based superlattices and nanomaterials

From thermoelectric bulk to nanomaterials: Current progress for Bi₂Te₃ and CoSb₃

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Nanostructure, Excitations, and Thermoelectric Properties of Bi2Te3-Based Nanomaterials

Cited by 18 publications

References 29 publications

Effect of doping indium into a Bi2Te3 matrix on the microstructure and thermoelectric transport properties

Effect of doping indium into a Bi2Te3 matrix on the microstructure and thermoelectric transport properties

Nanostructure, thermoelectric properties, and transport theory of V2VI3 and V2VI3/IV–VI based superlattices and nanomaterials

From thermoelectric bulk to nanomaterials: Current progress for Bi2Te3 and CoSb3

Contact Info

Product

Resources

About

Effect of doping indium into a Bi₂Te₃ matrix on the microstructure and thermoelectric transport properties

Effect of doping indium into a Bi₂Te₃ matrix on the microstructure and thermoelectric transport properties

Nanostructure, thermoelectric properties, and transport theory of V₂VI₃ and V₂VI₃/IV–VI based superlattices and nanomaterials

From thermoelectric bulk to nanomaterials: Current progress for Bi₂Te₃ and CoSb₃