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

Arash Mehdizadeh Dehkordi | Zendy; Sriparna Bhattacharya | Zendy; Taghi Darroudi | Zendy; Husam N. Alshareef | Zendy; Terry M. Tritt | Zendy

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

Author(s) -

Arash Mehdizadeh Dehkordi,

Sriparna Bhattacharya,

Taghi Darroudi,

Husam N. Alshareef,

Terry M. Tritt

Publication year - 2015

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.4905417

Subject(s) - praseodymium , doping , thermoelectric effect , materials science , dopant , seebeck coefficient , crystallite , thermoelectric materials , ceramic , condensed matter physics , electrical resistivity and conductivity , thermal conductivity , optoelectronics , thermodynamics , electrical engineering , composite material , physics , metallurgy , engineering

Recently, we have reported a significant enhancement in the electronic and thermoelectric properties of bulk polycrystalline SrTiO3 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 Pr dopants. In order to further understand the underlying mechanism, we herein investigate the role of praseodymium doping source (Pr2O3 versus Pr6O11) on the synthesis and electronic transport in Pr-doped SrTiO3 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 SrTiO3 ceramics and provide new insight on further improvement of the thermoelectric power factor

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