Large thermoelectric power factor in Pr-doped SrTiO3-δ ceramics via grain-boundary-induced mobility enhancement

Arash Mehdizadeh Dehkordi, Sriparna K. Bhattacharya, Taghi Darroudi, Jennifer W. Graff, Udo Schwingenschlögl, Husam N. Alshareef, Terry M. Tritt

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

We report a novel synthesis strategy to prepare high-performance bulk polycrystalline Pr-doped SrTiO3 ceramics. A large thermoelectric power factor of 1.3 W m-1 K-1 at 500 °C is achieved in these samples. In-depth investigations of the electronic transport and microstructure suggest that this significant improvement results from a substantial enhancement in carrier mobility originating from the formation of Pr-rich grain boundaries. This work provides new directions to higher performance oxide thermoelectrics as well as possibly other properties and applications of this broadly functional perovskite material. © 2014 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)2478-2485
Number of pages8
JournalChemistry of Materials
Volume26
Issue number7
DOIs
StatePublished - Feb 4 2014

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemical Engineering(all)
  • Chemistry(all)

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