Significant enhancement in thermoelectric properties of polycrystalline Pr-doped SrTiO{sub 3−δ} ceramics originating from nonuniform distribution of Pr dopants

Bhattacharya, Sriparna; He, Jian; Alshareef, Husam N.

doi:10.1063/1.4875925

Title: Significant enhancement in thermoelectric properties of polycrystalline Pr-doped SrTiO{sub 3−δ} ceramics originating from nonuniform distribution of Pr dopants

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Abstract

Recently, we have reported a significant enhancement (>70% at 500 °C) in the thermoelectric power factor (PF) of bulk polycrystalline Pr-doped SrTiO{sub 3} ceramics employing a novel synthesis strategy which led to the highest ever reported values of PF among doped polycrystalline SrTiO{sub 3}. It was found that the formation of Pr-rich grain boundary regions gives rise to an enhancement in carrier mobility. In this Letter, we investigate the electronic and thermal transport in Sr{sub 1−x}Pr{sub x}TiO{sub 3} ceramics in order to determine the optimum doping concentration and to evaluate the overall thermoelectric performance. Simultaneous enhancement in the thermoelectric power factor and reduction in thermal conductivity in these samples resulted in more than 30% improvement in the dimensionless thermoelectric figure of merit (ZT) for the whole temperature range over all previously reported maximum values. Maximum ZT value of 0.35 was obtained at 500 °C.

Authors:

Bhattacharya, Sriparna; He, Jian ^[1]; Alshareef, Husam N. ^[2]

Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634 (United States)
Materials Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900 (Saudi Arabia)

Publication Date:: Mon May 12 00:00:00 EDT 2014

OSTI Identifier:: 22273434

Resource Type:: Journal Article

Journal Name:: Applied Physics Letters

Additional Journal Information:: Journal Volume: 104; Journal Issue: 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; CARRIER MOBILITY; CERAMICS; DOPED MATERIALS; GRAIN BOUNDARIES; POLYCRYSTALS; STRONTIUM TITANATES; THERMAL CONDUCTIVITY; THERMOELECTRIC PROPERTIES

Citation Formats


                    Dehkordi, Arash Mehdizadeh, E-mail: amehdiz@g.clemson.edu, Bhattacharya, Sriparna, He, Jian, Alshareef, Husam N., Tritt, Terry M., E-mail: ttritt@clemson.edu, and Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634. Significant enhancement in thermoelectric properties of polycrystalline Pr-doped SrTiO{sub 3−δ} ceramics originating from nonuniform distribution of Pr dopants.  United States: N. p., 2014. 
        Web.  doi:10.1063/1.4875925.

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                    Dehkordi, Arash Mehdizadeh, E-mail: amehdiz@g.clemson.edu, Bhattacharya, Sriparna, He, Jian, Alshareef, Husam N., Tritt, Terry M., E-mail: ttritt@clemson.edu, & Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634. Significant enhancement in thermoelectric properties of polycrystalline Pr-doped SrTiO{sub 3−δ} ceramics originating from nonuniform distribution of Pr dopants.  United States.  https://doi.org/10.1063/1.4875925

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                    Dehkordi, Arash Mehdizadeh, E-mail: amehdiz@g.clemson.edu, Bhattacharya, Sriparna, He, Jian, Alshareef, Husam N., Tritt, Terry M., E-mail: ttritt@clemson.edu, and Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634. 2014.  
        "Significant enhancement in thermoelectric properties of polycrystalline Pr-doped SrTiO{sub 3−δ} ceramics originating from nonuniform distribution of Pr dopants".  United States.  https://doi.org/10.1063/1.4875925.

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@article{osti_22273434,

  title        = {Significant enhancement in thermoelectric properties of polycrystalline Pr-doped SrTiO{sub 3−δ} ceramics originating from nonuniform distribution of Pr dopants},

  author       = {Dehkordi, Arash Mehdizadeh, E-mail: amehdiz@g.clemson.edu and Bhattacharya, Sriparna and He, Jian and Alshareef, Husam N. and Tritt, Terry M., E-mail: ttritt@clemson.edu and Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634},

  abstractNote = {Recently, we have reported a significant enhancement (>70% at 500 °C) in the thermoelectric power factor (PF) of bulk polycrystalline Pr-doped SrTiO{sub 3} ceramics employing a novel synthesis strategy which led to the highest ever reported values of PF among doped polycrystalline SrTiO{sub 3}. It was found that the formation of Pr-rich grain boundary regions gives rise to an enhancement in carrier mobility. In this Letter, we investigate the electronic and thermal transport in Sr{sub 1−x}Pr{sub x}TiO{sub 3} ceramics in order to determine the optimum doping concentration and to evaluate the overall thermoelectric performance. Simultaneous enhancement in the thermoelectric power factor and reduction in thermal conductivity in these samples resulted in more than 30% improvement in the dimensionless thermoelectric figure of merit (ZT) for the whole temperature range over all previously reported maximum values. Maximum ZT value of 0.35 was obtained at 500 °C.},

  doi          = {10.1063/1.4875925},

  url          = {https://www.osti.gov/biblio/22273434},
  journal      = {Applied Physics Letters},

  issn         = {0003-6951},

  number       = 19,

  volume       = 104,

  place        = {United States},

  year         = {Mon May 12 00:00:00 EDT 2014},

  month        = {Mon May 12 00:00:00 EDT 2014}

}

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