LiPbSb3S6: A Semiconducting Sulfosalt with Very Low Thermal Conductivity

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• 作者：Eva C. Agha ; Christos D. Malliakas ; Jino Im ; Hosub Jin ; Li-Dong Zhao ; Arthur J. Freeman ; Mercouri G. Kanatzidis
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：January 21, 2014
• 年：2014
• 卷：53
• 期：2
• 页码：673-675
• 全文大小：239K
• ISSN：1520-510X

文摘

The new semiconductor LiPbSb₃S₆ crystallizes in the space group P2₁/c. The structure is a member of the lillianite homologous series and is composed of layers of PbS archetype Sb/Li鈥揝 separated by trigonal-prismatic-coordinated Pb/Li. Electronic band structure calculations indicate an indirect band gap, with direct gaps lying very close in energy. LiPbSb₃S₆ has one of the lowest thermal conductivities seen in a crystalline material, 0.24 W m^鈥? K^鈥? at room temperature, and a high resistivity, 4 脳 10⁹ 惟路cm, and exhibits strong light absorption with a nearly direct band gap of 1.6 eV.