PUB-2015-NIO

New insights on the synthesis and electronic transport in bulk polycrystalline Pr-doped SrTiO3− δ

Arash Mehdizadeh Dehkordi, Sriparna Bhattacharya, Taghi Darroudi, Husam N. Alshareef, and Terry M. Tritt, "New insights on the synthesis and electronic transport in bulk polycrystalline Pr-doped SrTiO3− δ"
J. Appl. Phys. 117, 055102 (2015)
2015
Pr-doped SrTiO3− δ
2015
Recently, we have reported a significant enhancement in the electronic and thermoelectricproperties of bulk polycrystalline SrTiO ceramics via praseodymium doping. This improvement was originated from the simultaneous enhancement in the thermoelectric power factor and reduction in thermal conductivity, which was contributed to the non-uniform distribution of Prdopants. In order to further understand the underlying mechanism, we herein investigate the role of praseodymium doping source (PrO versus PrO) on the synthesis and electronic transport in Pr-doped SrTiO ceramics. It was observed that the high-temperature electronic transport properties are independent of the choice of praseodymium doping source for samples prepared following our synthesis strategy. Theoretical calculations were also performed in order to estimate the maximum achievable power factor and the corresponding optimal carrier concentration. The result suggests the possibility of further improvement of the power factor. This study should shed some light on the superior electronic transport in bulk polycrystalline Pr-doped SrTiO ceramics and provide new insight on further improvement of the thermoelectricpower factor.