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Study of Nanostructure Inclusion Effects on the Thermoelectric Behavior of Ca3Co4O9 Thin Films Grown by Pulsed Laser Deposition

Published online by Cambridge University Press:  01 February 2011

Evan Lyle Thomas ,
Xueyan Song ,
Yonggao Yan ,
Joshua Martin ,
Winnie Wong-Ng ,
Margaret Ratcliff  and
Paul N. Barnes
Evan Lyle Thomas
Affiliation:
[email protected], University of Dayton Research Institute, Metals and Ceramics Division, Dayton, Ohio, United States
Xueyan Song
Affiliation:
[email protected], West Virginia University, Mechanical and Aerospace Engineering, Morgantown, West Virginia, United States
Yonggao Yan
Affiliation:
[email protected], NIST, Ceramics Division, Gaithersburg, Maryland, United States
Joshua Martin
Affiliation:
[email protected], NIST, Ceramics Division, Gaithersburg, Maryland, United States
Winnie Wong-Ng
Affiliation:
[email protected], NIST, Ceramics Division, Gaithersburg, Maryland, United States
Margaret Ratcliff
Affiliation:
[email protected], University of Dayton, Mechanical Engineering, Dayton, Ohio, United States
Paul N. Barnes
Affiliation:
[email protected], Air Force Research Laboratory, Propulsion Directorate, WPAFB, Ohio, United States
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Abstract

The influence of incorporating nanoparticulate additions into Ca3Co4O9 (CCO) thin films prepared by pulsed laser deposition using composite targets of CCO and CCO + 3wt% BaZrO3 (BZO) on Si and LaAlO3 substrates is investigated. X-ray data and high-resolution scanning electron microscopy reveal preferred c-axis orientation of the films deposited on Si substrates with the formation of nanoparticles between ∼ 10 – 50 nm. Preliminary thermoelectric behavior shows an enhancement of the power factor α2/ρ at room temperature. The microstructure and thermoelectric behavior of the CCO films are compared to the BZO-doped films.

Keywords

thermoelectricnanostructureoxide
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1267: Symposium DD – Thermoelectric Materials 2010-Growth, Properties, Novel Characterization Methods and Applications , 2010 , 1267-DD10-14
Copyright
Copyright © Materials Research Society 2010

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