Crystal Growth, Thermoelectric Properties, and Electronic Structure of AgBi3S5 and AgSbxBi3-xS
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- 作者：Jun-Ho Kim ; Duck-Young Chung ; Daniel Bilc ; Sim Loo ; Jarrod Short ; Subhendra D. Mahanti ; Tim Hogan ; and Mercouri G. Kanatzidis
- 刊名：Chemistry of Materials
- 出版年：2005
- 出版时间：July 12, 2005
- 年：2005
- 卷：17
- 期：14
- 页码：3606 - 3614
- 全文大小：376K
- 年卷期：v.17,no.14(July 12, 2005)
- ISSN：1520-5002
文摘
The compound AgBi3S5 (I) (synthetic pavonite) and its solid solution AgSbxBi3-xS5 (x = 0.3) (II)were prepared by direct combination of elemental Ag, Bi, Sb, and S. They crystallize in the monoclinicspace group C2/m with a = 13.345(3) Å, b = 4.0416(8) Å, c = 16.439(3) Å, and 
= 94.158(3)
for Iand a = 13.302(4) Å, b = 4.0381(11) Å, c = 16.388(5) Å, and = 94.347(5) for II. The Bridgmantechnique was used to grow bulk crystals of these materials. The crystal structure refinements,physicochemical properties, and thermoelectric properties of these materials are presented. Thethermoelectric power for AgBi3S5 and AgSb0.3Bi2.7S5 showed -64 and -98 
V/K, respectively, withroom-temperature electrical conductivity of 489 and 260 S/cm. The thermal conductivity for bothcompounds at room temperature was measured to be very low at ~1 W/m·K, respectively. Electronicband structure calculations for AgBi3S5 suggest the importance of silver d-states to the charge transportand also indicate the presence of an indirect energy gap.
= 94.158(3) for Iand a = 13.302(4) Å, b = 4.0381(11) Å, c = 16.388(5) Å, and = 94.347(5) for II. The Bridgmantechnique was used to grow bulk crystals of these materials. The crystal structure refinements,physicochemical properties, and thermoelectric properties of these materials are presented. Thethermoelectric power for AgBi3S5 and AgSb0.3Bi2.7S5 showed -64 and -98 V/K, respectively, withroom-temperature electrical conductivity of 489 and 260 S/cm. The thermal conductivity for bothcompounds at room temperature was measured to be very low at ~1 W/m·K, respectively. Electronicband structure calculations for AgBi3S5 suggest the importance of silver d-states to the charge transportand also indicate the presence of an indirect energy gap.