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

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    Type
    Article
    Authors
    Mehdizadeh Dehkordi, Arash
    Bhattacharya, Sriparna K.
    Darroudi, Taghi
    Graff, Jennifer W.
    Schwingenschlögl, Udo cc
    Alshareef, Husam N. cc
    Tritt, Terry M.
    KAUST Department
    Computational Physics and Materials Science (CPMS)
    Functional Nanomaterials and Devices Research Group
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2014-02-04
    Online Publication Date
    2014-02-04
    Print Publication Date
    2014-04-08
    Permanent link to this record
    http://hdl.handle.net/10754/563491
    
    Metadata
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    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.
    Citation
    Mehdizadeh Dehkordi, A., Bhattacharya, S., Darroudi, T., Graff, J. W., Schwingenschlögl, U., Alshareef, H. N., & Tritt, T. M. (2014). Large Thermoelectric Power Factor in Pr-Doped SrTiO3−δ Ceramics via Grain-Boundary-Induced Mobility Enhancement. Chemistry of Materials, 26(7), 2478–2485. doi:10.1021/cm4040853
    Sponsors
    The authors wish to acknowledge the Faculty Initiated Collaboration (FIC) competitive grant from KAUST. The authors also wish to acknowledge M. N. Hedhili for XPS measurements and Dr. Jian He for many thoughtful conversations and discussions.
    Publisher
    American Chemical Society (ACS)
    Journal
    Chemistry of Materials
    DOI
    10.1021/cm4040853
    ae974a485f413a2113503eed53cd6c53
    10.1021/cm4040853
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; Computational Physics and Materials Science (CPMS)

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