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Published July 2011 | public
Journal Article

Nanostructuring in β-Zn_4Sb_3 with variable starting Zn compositions


Thermoelectric Zn_(4−δ)Sb_3 samples with varying Zn concentrations were synthesized. The morphology, along with planar and extended defects was studied using transmission electron microscopy (TEM). For all the Zn concentrations, nanostructuring was observed. Depending on the Zn concentration, two different types of nanostructures were observed: nanovoids and nanograins. Three samples with Zn:Sb ratios of 1.28, 1.30, and 1.36 were studied. The presence of the secondary phases was discussed in terms of the phase diagram. Density functional theory (DFT) calculations further elucidated the formation of secondary phases as a function of different Zn:Sb ratio.

Additional Information

© 2011 Wiley-VCH Verlag GmbH & Co. Received 7 October 2010, revised 28 February 2011, accepted 7 March 2011. Article first published online: 31 Mar. 2011. Ole Bjørn Karlsen is thanked for fruitful discussions. The Norwegian Research Council and Marie Curie-PERG05-GA-2009-249243 are thanked for financial support.

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