Thermoelectric Properties of the LaCoO₃-LaCrO₃ System Using a High-Throughput Combinatorial Approach

Authors

K. R. Talley, National Institute of Standards and Technology
S. C. Barron, National Institute of Standards and Technology
N. Nguyen, National Institute of Standards and Technology
W. Wong-Ng, National Institute of Standards and Technology
J. Martin, National Institute of Standards and Technology
Y. L. Zhang, Boise State University
X. Song, West Virginia University

Document Type

Article

Publication Date

2-2017

DOI

http://dx.doi.org/10.1016/j.solidstatesciences.2016.12.002

Abstract

A combinatorial film of the LaCo_1-xCr_xO₃ system was fabricated using the LaCoO₃ and LaCrO₃ targets at the NIST Pulsed Laser Deposition (PLD) facility. As the ionic size of Cr³⁺ is greater than that of Co³⁺, the unit cell volume of the series increases with increasing x. Using a custom screening tool, the Seebeck coefficient of LaCo_1-xCr_xO₃ approaches a measured maximum of 286 μV/K, near to the cobalt-rich end of the film library (with x ≈ 0.49). The resistivity value increases continuously with increasing x. The measured power factor, PF, of this series, which is related to the efficiency of energy conversion, also exhibits a maximum at the composition of x ≈ 0.49, which corresponds to the maximum value of the Seebeck coefficient. Our results illustrate the efficiency of applying the high-throughput combinatorial technique to study thermoelectric materials.

Publication Information

Talley, K. R.; Barron, S. C.; Nguyen, N.; Wong-Ng, W.; Martin, J.; Zhang, Y. L.; and Song, X. (2017). "Thermoelectric Properties of the LaCoO3-LaCrO3 System Using a High-Throughput Combinatorial Approach". Solid State Sciences, 64, 7-12. http://dx.doi.org/10.1016/j.solidstatesciences.2016.12.002