Work

The Effect of Mesoporous Structure on the Thermoelectric Properties of Nonstoichiometric La-Doped SrTiO3

Year: 2016

Type: article

Abstract: We investigated the effect of mesoporous structure on the thermoelectric properties of La-doped SrTiO 3 films through the analyses of their structural, electrical, and thermoelectric properties. The mesoporous structure induces a decrease in thermal conductivity and an increase in the Seebeck coefficient because of increased phonon and carrier scattering. The increase of electrical resistivity was smaller than the changes in the Seebeck coefficient and thermal conductivity. As a result, the incorporation of Brij-S10 surfactant into La-doped SrTiO 3 films induced an increase of the figure of merit. The maximum value of the figure of merit—approximately 0.025 at 200°C—was obtained with a Brij-S10 molar ratio of 0.1; this figure of merit was approximately 35% higher than that of a La-doped SrTiO 3 film without the Brij-S10 surfactant. The results of our study suggest that the mesoporous structure could play a role in enhancing the thermoelectric properties.

Source: Journal of The Electrochemical Society

DOI: 10.1149/2.0441606jes

Authors: Chang-Sun Park, WooJe Han, Dong Il Shim, Hyung Hee Cho, Hyung-Ho Park

Institution: Yonsei University

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: National Research Foundation, Pohang University of Science and Technology, Ministry of Science, ICT and Future Planning, National Research Foundation of Korea