@article { ,
	title = {Synthesis and thermoelectric properties of KyCo4Sb12},
	journal = {Applied Physics Letters},
	volume = {89},
	year = {2006},
	note = {2007 Goldsmid Award Winner},
	pages = {221107-1},
	abstract = {Polycrystalline K-filled CoSb3 are synthesized successfully. The uplimit for K filling is at least 0.45, being higher than those of either alkaline-earth (AE) or rare-earth (RE) metals but being in consistent with our earlier theoretical prediction. The measured transport properties (300–800  K) show that K filling does not lower thermal conductivity much in comparison with AE or RE filling due to the relatively low mass of K atom. However, it improves electrical conductivity, retains large Seebeck coefficient, and leads to a reasonably good thermoelectric performance for the filled skutterudites. The maximum figure of merit ZT reaches 1 at 800  K for K0.38Co4Sb12.},
	URL = {http://link.aip.org/link/?APL/89/221107/1 },
	author = {Y. Z. Pei and L. D. Chen and W. Zhang and X. Shi and S. Q. Bai and X. Y. Zhao and Z. G. Mei and  X. Y. Li}
}