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

Dankwort, T., Hansen, A. L., Winkler, M., Schurmann, U., Koenig, J. D., Johnson, D. C., Hinsche, N. F., Zahn, P., Mertig, I., Bensch, Wolfgang and Kienle, L. (2016) Nanostructure, thermoelectric properties, and transport theory of V2VI3 and V2VI3/IV-VI based superlattices and nanomaterials Physica Status Solidi a-Applications and Materials Science, 213 (3). pp. 662-671. DOI 10.1002/pssa.201532471.

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Abstract

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)(12)TiSe2 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 nanostnicture observed by ex situ and in situ X-ray diffraction (XRD) and transmission electron microscopy (TEM). Consequently a degradation of ZT at 450 degrees C from similar to 2.0 to similar to 1.0 was observed, while samples with x = 0.038 showed a stable ZT of 1.5. (C) 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Document Type: Article
Additional Information: Times Cited: 0 Dankwort, Torben Hansen, Anna-Lena Winkler, Markus Schuermann, Ulrich Koenig, Jan D. Johnson, David C. Hinsche, Nicki F. Zahn, Peter Mertig, Ingrid Bensch, Wolfgang Kienle, Lorenz Si
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence
Kiel University
Refereed: Yes
DOI etc.: 10.1002/pssa.201532471
ISSN: 1862-6300
Projects: Future Ocean
Date Deposited: 14 Mar 2017 15:11
Last Modified: 14 Mar 2017 15:11
URI: http://eprints.uni-kiel.de/id/eprint/36047

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