Investigation of the microstructural and thermoelectric properties of the (GeTe)0.95 (Bi2Te3)0.05 composition for thermoelectric power generation applications

Lior Weintraub, Joseph Davidow, Jonathan Tunbridge, Richard Dixon, Michael John Reece, Huanpo Ning, Iñigo Agote, Yaniv Gelbstein

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Abstract

In the frame of the current research, the p -type Bi2Te 3 doped (GeTe)0.95(Bi2Te3) 0.05 alloy composed of hot pressed consolidated submicron structured powder was investigated. The influence of the process parameters (i.e., powder particles size and hot pressing conditions) on both reduction of the lattice thermal conductivity and electronic optimization is described in detail. Very high maximal ZT values of up to ∼1.6 were obtained and correlated to the microstructural characteristics. Based on the various involved mechanisms, a potential route for further enhancement of the ZT values of the investigated composition is proposed.

Original languageEnglish
Article number284634
JournalJournal of Nanomaterials
Volume2014
DOIs
StatePublished - 18 Feb 2014

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