Design and Synthesis of a New Layered Thermoelectric Material LaPbBiS3O

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• 作者：Yun-Lei Sun ; Abduweli Ablimit ; Hui-Fei Zhai ; Jin-Ke Bao ; Zhang-Tu Tang ; Xin-Bo Wang ; Nan-Lin Wang ; Chun-Mu Feng ; Guang-Han Cao
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：October 20, 2014
• 年：2014
• 卷：53
• 期：20
• 页码：11125-11129
• 全文大小：356K
• ISSN：1520-510X

文摘

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) 脜, c = 19.7754(6) 脜, and Z = 2. Electrical resistivity and Hall effect measurements demonstrate that it is a narrow gap semiconductor with an activation energy of 鈭?7 meV. The thermopower and the figure of merit at room temperature were measured to be 鈭?2 渭V/K and 0.23, respectively, which makes LaPbBiS₃O and its derivatives be promising for thermoelectric applications.