PUB-2014-LTP

Large Thermoelectric Power Factor in Pr-Doped SrTiO3−δ Ceramics via Grain-Boundary-Induced Mobility Enhancement

A. M. Dehkordi, S. Bhattacharya, T. Darroudi, H.N. Alshareef, and T. M. Tritt, “Large Thermoelectric Power Factor in Pr-Doped SrTiO3−δ Ceramics via Grain-Boundary-Induced Mobility Enhancement”
Chem. Mater., 201426 (7), pp 2478–2485; Cover page
A. M. Dehkordi, S. Bhattacharya, T. Darroudi, H.N. Alshareef, and T. M. Tritt
Thermoelectric Power Factor, Mobility, SrTiO3−δ Ceramics
2014
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.