Hsu Kuei Fang, Loo Sim, Guo Fu, Chen Wei, Dyck Jeffrey S, Uher Ctirad, Hogan Tim, Polychroniadis E K, Kanatzidis Mercouri G
Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA.
Science. 2004 Feb 6;303(5659):818-21. doi: 10.1126/science.1092963.
The conversion of heat to electricity by thermoelectric devices may play a key role in the future for energy production and utilization. However, in order to meet that role, more efficient thermoelectric materials are needed that are suitable for high-temperature applications. We show that the material system AgPb(m)SbTe(2+m) may be suitable for this purpose. With m = 10 and 18 and doped appropriately, n-type semiconductors can be produced that exhibit a high thermoelectric figure of merit material ZTmax of approximately 2.2 at 800 kelvin. In the temperature range 600 to 900 kelvin, the AgPb(m)SbTe(2+m) material is expected to outperform all reported bulk thermoelectrics, thereby earmarking it as a material system for potential use in efficient thermoelectric power generation from heat sources.
通过热电器件将热能转化为电能在未来的能源生产和利用中可能发挥关键作用。然而，为了发挥这一作用，需要更高效的适用于高温应用的热电材料。我们表明，材料体系AgPb(m)SbTe(2+m)可能适用于此目的。当m = 10和18并进行适当掺杂时，可以制备出n型半导体，其在800开尔文时表现出约2.2的高热电优值ZTmax。在600至900开尔文的温度范围内，AgPb(m)SbTe(2+m)材料预计将优于所有已报道的体相热电材料，从而使其成为一种有望用于从热源高效发电的热电材料体系。
