An alpha-rhombohedral boron-related compound with sulfur: Synthesis, structure and thermoelectric properties

作者：Sologub O; Matsushita Y; Mori T^*

来源：Scripta Materialia, 2013, 68(5): 289-292.

DOI：10.1016/j.scriptamat.2012.10.044

• Borides
• Semiconductors
• Crystal structure
• Thermoelectric properties
• X-ray diffraction

The structural and thermoelectric properties of a series of icosahedral boron-rich solids, B6S1 - x obtained from the elements in a Ga melt were studied to estimate their potential as thermoelectric materials. Rietveld analysis of synchrotron and conventional X-ray powder data displayed the rhombohedral structure with the alpha-rhombohedral boron framework of B-12 icosahedra and a narrow filling fraction range for sulfur atoms in the interstitial voids (0.37 %26lt; x %26lt;= 0.40). The samples obtained exhibited p-type semiconducting behavior with large Seebeck coefficients, reaching a maximum of similar to 220 mu V K-1.

• 出版日期2013-3