High thermoelectric potential of n -type Pb1-xTixTe alloys

Genady Komisarchik, David Fuks, Yaniv Gelbstein

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

In an attempt to reduce the reliance on fossil fuels, associated with severe environmental effects, the current research is focused on the identification of the thermoelectric potential of n-type Pb1-xTixTe alloys, with x values of up to 3%. A solubility limit of 0.5 at. % Ti in PbTe was identified, while beyond this composition, a precipitation of a TiTe2 phase was occurred. An impressive maximal dimensionless thermoelectric figure of merit ZT of ∼1.2 was obtained upon 0.1% Ti doping at 500 °C, indicating a ∼9% efficiency enhancement compared to an undoped PbTe. It is shown that generating a functionally graded material based on undoped PbTe as a low temperature segment and a 0.1% Ti doped PbTe as a high temperature segment has a potential to enhance the efficiency by ∼14% compared to the undoped sample.

Original languageEnglish
Article number055104
JournalJournal of Applied Physics
Volume120
Issue number5
DOIs
StatePublished - 7 Aug 2016

ASJC Scopus subject areas

  • Physics and Astronomy (all)

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