Journal
INORGANIC CHEMISTRY
Volume 53, Issue 20, Pages 11125-11129Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic501687h
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Funding
- Scholarship Award for Excellent Doctoral Student - Ministry of Education, NSF of China [11190023]
- National Basic Research Program of China [2010CB923003, 2011CBA00103]
- Fundamental Research Funds for the Central Universities of China [2013FZA3003]
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A new quinary oxysulfide LaPbBiS3O was designed and successfully synthesized via a solid-state reaction in a sealed evacuated quartz tube. This material, composed of stacked NaCl-like [M4S6] (where M = Pb, Bi) layers and fluorite-type [La2O2] layers, crystallizes in the tetragonal space group P4/nmm with a = 4.0982(1) angstrom, c = 19.7754(6) angstrom, and Z = 2. Electrical resistivity and Hall effect measurements demonstrate that it is a narrow gap semiconductor with an activation energy of similar to 17 meV. The thermopower and the figure of merit at room temperature were measured to be -52 mu V/K and 0.23, respectively, which makes LaPbBiS3O and its derivatives be promising for thermoelectric applications.
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