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@ARTICLE{Aabdin:21696,
author = {Aabdin, Z. and Peranio, N. and Eibl, O. and Töllner, W.
and Nielsch, K. and Bessas, D. and Hermann, R. and Winkler,
M. and König, J. and Böttner, H. and Pacheco, V. and
Schmidt, J. and Hashibon, A. and Elsässer, C.},
title = {{N}anostructure, excitations, and thermoelectric properties
of {B}i2{T}e3-based nanomaterials},
journal = {Journal of electronic materials},
volume = {41},
issn = {0361-5235},
address = {Warrendale, Pa},
publisher = {TMS},
reportid = {PreJuSER-21696},
pages = {1792 - 1798},
year = {2012},
note = {Financial support by the German Research Foundation (DFG)
is gratefully acknowledged, Priority Programme 1386
"Nanostructured Thermoelectric Materials: Theory, Model
Systems and Controlled Synthesis.'' O.E. and N.P. thank Dr.
Martina Luysberg for help with aberration-corrected STEM at
the Ernst Ruska Center for Microscopy and Spectroscopy with
Electrons, Forschungszentrum Julich. R.P.H. and D.B.
acknowledge funding from the Helmholtz Association of German
Research Center (NG-407) as well as the European Synchrotron
Radiation Facility and the Advanced Photon Source for
provision of beam time at ID22N and 6-IDD, respectively.},
abstract = {The effect of dimensionality and nanostructure on
thermoelectric properties in Bi2Te3-based nanomaterials is
summarized. Stoichiometric, single-crystalline Bi2Te3
nanowires were prepared by potential-pulsed electrochemical
deposition in a nanostructured Al2O3 matrix, yielding
transport in the basal plane. Polycrystalline, textured
Sb2Te3 and Bi2Te3 thin films were grown at room temperature
using molecular beam epitaxy and subsequently annealed at
250A degrees C. Sb2Te3 films revealed low charge carrier
density of 2.6 x 10(19) cm(-3), large thermopower of 130 V
K-1, and large charge carrier mobility of 402 cm(2) V-1
s(-1). Bi-2(Te0.91Se0.09)(3) and (Bi0.26Sb0.74)(2)Te-3
nanostructured bulk samples were prepared from as-cast
materials by ball milling and subsequent spark plasma
sintering, yielding grain sizes of 50 nm and thermal
diffusivities reduced by $60\%.$ Structure, chemical
composition, as well as electronic and phononic excitations
were investigated by x-ray and electron diffraction, nuclear
resonance scattering, and analytical energy-filtered
transmission electron microscopy. calculations yielded point
defect energies, excitation spectra, and band structure.
Mechanisms limiting the thermoelectric figure of merit for
Bi2Te3 nanomaterials are discussed.},
keywords = {J (WoSType)},
cin = {PGI-4 / JCNS-2 / JARA-FIT},
ddc = {670},
cid = {I:(DE-Juel1)PGI-4-20110106 / I:(DE-Juel1)JCNS-2-20110106 /
$I:(DE-82)080009_20140620$},
pnm = {Grundlagen für zukünftige Informationstechnologien
(FUEK412) / 544 - In-house Research with PNI (POF2-544)},
pid = {G:(DE-Juel1)FUEK412 / G:(DE-HGF)POF2-544},
shelfmark = {Engineering, Electrical $\&$ Electronic / Materials
Science, Multidisciplinary / Physics, Applied},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000304205100132},
doi = {10.1007/s11664-012-1997-6},
url = {https://juser.fz-juelich.de/record/21696},
}