Synthesis and phase width of new quaternary selenides PbxSn 6-xBi2Se9 (x=04.36)

Kuei Bo Chen, Chi-Shen Lee*

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Quaternary chalcogenides PbxSn6-xBi 2Se9 (x=04.36) were synthesized with solid-state methods; their structures were determined from the X-ray diffraction of single crystals. PbxSn6-xBi2Se9 crystallizes in an orthorhombic space group Cmcm (No. 63); the structure features a three-dimensional framework containing slabs of NaCl-(3 1 1) type that exhibits identical layers containing seven octahedra units, which expand along the direction [0 1 0]. Each slab contains fused rectangular units that are connected to each other with MSe contacts in a distorted octahedral environment. Calculations of the band structure, measurements of Seebeck coefficient and electrical conductivity confirm that these compounds are n-type semiconductors with small band gaps and large electrical conductivities.

Original languageEnglish
Pages (from-to)2616-2622
Number of pages7
JournalJournal of Solid State Chemistry
Volume183
Issue number11
DOIs
StatePublished - 1 Nov 2010

Keywords

  • Chalcogenide
  • Homologous
  • Lillianite
  • Thermoelectrics

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