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Published October 17, 2011 | Published
Journal Article Open

Alloying to increase the band gap for improving thermoelectric properties of Ag_(2)Te

Abstract

Ag_(2)Te simultaneously shows high mobility and low thermal conductivity, however the relatively low band gap of ~0.2 eV prevents it from achieving high thermoelectric figure of merit, zT, in the high temperature phase. In this study, the band gap of Ag_(2)Te has been increased enabling a zT of unity by forming alloys and composites with PbTe, thereby demonstrating the importance of exploiting potentially good thermoelectrics among these small band gap semiconductors and similar materials.

Additional Information

© 2011 Royal Society of Chemistry. Received 10th August 2011; Accepted 29th September 2011. First published on the web 17 Oct 2011. This work is supported by NASA-JPL and DARPA Nano Materials Program.

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