摘要
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.
原文 | English |
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頁(從 - 到) | 2616-2622 |
頁數 | 7 |
期刊 | Journal of Solid State Chemistry |
卷 | 183 |
發行號 | 11 |
DOIs | |
出版狀態 | Published - 1 十一月 2010 |