Article (Scientific journals)
From thermoelectric bulk to nanomaterials: Current progress for Bi2Te3 and CoSb3
Peranio, N.; Eibl, O.; Bäßler, S. et al.
2016In Physica Status Solidi A. Applications and Materials Science, 213 (3), p. 739-749
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Keywords :
Bi2Te3; CoSb3; Calculations; Characterization; Crystal lattices; Electric power factor; Electron microscopy; Film preparation; High resolution transmission electron microscopy; Lattice vibrations; Molecular beam epitaxy; Molecular dynamics; Nanocomposites; Nanostructured materials; Nanostructures; Neutron scattering; Point defects; Reduction; Semiconducting selenium compounds; Sintering; Spark plasma sintering; Thermal conductivity; Thermoelectricity; Thin films; Transmission electron microscopy; X ray diffraction; Characterization methods; CoSb<sub>3</sub>; Lattice thermal conductivity; Low thermal conductivity; Non equilibrium molecular dynamic (NEMD); Pulsed electrochemical deposition; Single-phase thin films; Synthesis and characterizations; Defects
Abstract :
[en] 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. 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. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Disciplines :
Chemistry
Author, co-author :
Peranio, N.;  Institute of Applied Physics, Eberhard Karls University of Tübingen, Auf der Morgenstelle 10, Tübingen, Germany
Eibl, O.;  Institute of Applied Physics, Eberhard Karls University of Tübingen, Auf der Morgenstelle 10, Tübingen, Germany
Bäßler, S.;  Institute of Nanostructure and Solid State Physics, University of Hamburg, Jungiusstraße 11, Hamburg, Germany
Nielsch, K.;  Institute of Nanostructure and Solid State Physics, University of Hamburg, Jungiusstraße 11, Hamburg, Germany
Klobes, B.;  Jülich Centre for Neutron Science JCNS, Peter Grünberg Institute PGI, JARA-FIT, Forschungszentrum Jülich GmbH, Leo Brandt Str. 1, Jülich, Germany
Hermann, Raphaël ;  Université de Liège - ULiège > Département de chimie (sciences) > Département de chimie (sciences)
Daniel, M.;  Institute of Physics, Technische Universität Chemnitz, Reichenhainer Str. 70, Chemnitz, Germany
Albrecht, M.;  Institute of Physics, Technische Universität Chemnitz, Reichenhainer Str. 70, Chemnitz, Germany, Institute of Physics, University of Augsburg, Universitätsstraße 1 Nord, Augsburg, Germany
Görlitz, H.;  Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Branch Lab Dresden, Winterbergstraße 28, Dresden, Germany
Pacheco, V.;  Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Branch Lab Dresden, Winterbergstraße 28, Dresden, Germany
Bedoya-Martínez, N.;  Fraunhofer-Institut für Werkstoffmechanik IWM, Wöhlerstraße 11, Freiburg, Germany
Hashibon, A.;  Fraunhofer-Institut für Werkstoffmechanik IWM, Wöhlerstraße 11, Freiburg, Germany
Elsässer, C.;  Fraunhofer-Institut für Werkstoffmechanik IWM, Wöhlerstraße 11, Freiburg, Germany
More authors (3 more) Less
Language :
English
Title :
From thermoelectric bulk to nanomaterials: Current progress for Bi2Te3 and CoSb3
Publication date :
2016
Journal title :
Physica Status Solidi A. Applications and Materials Science
ISSN :
1862-6300
eISSN :
1862-6319
Publisher :
Wiley-VCH Verlag
Volume :
213
Issue :
3
Pages :
739-749
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 14 November 2020

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