Thermoelectric properties of the LaCoO3-LaCrO3 system using a high-throughput combinatorial approach
Abstract A combinatorial film of the LaCo 1-x Cr x O 3 system was fabricated using the LaCoO 3 and LaCrO 3 targets at the NIST Pulsed Laser Deposition (PLD) facility. As the ionic size of Cr 3+ is greater than that of Co 3+ , the unit cell volume of the series increases with increasing x. Using a custom screening tool, the Seebeck coefficient of LaCo 1-x Cr x O 3 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. Highlights LaCo 1-x Cr x O 3 combinatorial film successfully prepared. Seebeck Coefficients and resistance of the film measured with custom screening tool. Power factor of the optimum composition region of LaCo 1-x Cr x O 3 determined. High-throughput combinatorial methodology guides bulk sample investigations. Graphical abstract [DISPLAY OMISSION]
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- DOI : http://dx.doi.org/10.1016/j.solidstatesciences.2016.12.002
- Elsevier : 저널> 권호 > 논문
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