High thermoelectric figure of merit and nanostructuring in bulk p-type Gex(SnyPb1-y)1-xTe alloys following a spinodal decomposition reaction

Yaniv Gelbstein, Boaz Dado, Ohad Ben-Yehuda, Yatir Sadia, Zinovy Dashevsky, Moshe P. Dariel

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

The use of thermoelectricity for direct energy conversion from thermal to electrical energy has a long-standing history. We report that the complex p-type Ge(Sn,Pb,Te)Te alloys upon suitable alloying with SnTe can be designed to obtain very high ZT values of up to 1.2 because of both optimal electronic transport properties and minimal lattice thermal conductivity. Such alloys follow a spinodal decomposition reaction, leading to an ordered periodic nanostructure that is effective in the scattering of phonons and reduction of the lattice thermal conductivity.

Original languageEnglish
Pages (from-to)1054-1058
Number of pages5
JournalChemistry of Materials
Volume22
Issue number3
DOIs
StatePublished - 9 Feb 2010

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