Zeitschrift für Anorganische und Allgemeine Chemie
Zeitschrift für Anorganische und Allgemeine Chemie
4 years ago

Structural Complexity and Thermoelectric Properties of Quaternary and Quinary Tellurides (GexSn1–x)0.8(InySb1–y)0.13Te with 0 ≤ x,y ≤ 1

Structural Complexity and Thermoelectric Properties of Quaternary and Quinary Tellurides (GexSn1–x)0.8(InySb1–y)0.13Te with 0 ≤ x,y ≤ 1
Manuel Scheel, Stefan Schwarzmüller, Lukas Neudert, Simon Welzmiller, Oliver Oeckler
Starting from stoichiometric mixtures of the elements, quaternary and quinary solid solutions (GexSn1–x)0.8(InySb1–y)0.13Te were obtained. Concerning the ratio Ge/Sn and Sb/In, respectively, lattice parameters of the metastable phases with rocksalt-type average structures approximately obey Vegard's law. Stable phases correspond to a disordered rocksalt type at high temperature and to trigonal layered structures with van der Waal gaps at lower temperature as shown by temperature-dependent powder X-ray diffraction combined with TEM, which reveals layer-like vacancy ordering, whose extent depends on composition and thermal treatment. In the long-periodically ordered model compounds 21R-Ge0.5Sn0.5InSbTe4 and 9P-GeSnInSbTe5 studied by resonant scattering data at K-absorption edges, Sb and Sn concentrate near the van der Waals gaps. Compared to Ge0.8Sb0.13Te and Sn0.8Sb0.13Te, the simultaneous presence of In and Sn combines increased electrical conductivity with low thermal conductivity and enhanced thermoelectric properties in certain temperature ranges. Phase transitions correlate with changes of the thermoelectric properties.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/zaac.201700337

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.