The effect of mesoporous structure on the thermoelectric properties of nonstoichiometric La-doped SrTiO3

Chang Sun Park; Woo Je Han; Dong Il Shim; Hyung Hee Cho; Hyung Ho Park

doi:10.1149/2.0441606jes

The effect of mesoporous structure on the thermoelectric properties of nonstoichiometric La-doped SrTiO₃

Chang Sun Park, Woo Je Han, Dong Il Shim, Hyung Hee Cho, Hyung Ho Park

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

We investigated the effect of mesoporous structure on the thermoelectric properties of La-doped SrTiO₃ 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 SrTiO₃ 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 SrTiO₃ 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.

Original language	English
Pages (from-to)	E155-E158
Journal	Journal of the Electrochemical Society
Volume	163
Issue number	6
DOIs	https://doi.org/10.1149/2.0441606jes
Publication status	Published - 2016

Bibliographical note

Funding Information:
This work was supported by the Center for Advanced Meta-Materials (CAMM) funded by the Ministry of Science, ICT and Future Planning as Global Frontier Project (CAMM-No. NRF-2014M3A6B3063716). This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2015R1A2A1A15054541). Experiments at PLS were supported in part by MEST and POSTECH.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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title = "The effect of mesoporous structure on the thermoelectric properties of nonstoichiometric La-doped SrTiO3",

abstract = "We investigated the effect of mesoporous structure on the thermoelectric properties of La-doped SrTiO3 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 SrTiO3 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 SrTiO3 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.",

author = "Park, {Chang Sun} and Han, {Woo Je} and Shim, {Dong Il} and Cho, {Hyung Hee} and Park, {Hyung Ho}",

note = "Funding Information: This work was supported by the Center for Advanced Meta-Materials (CAMM) funded by the Ministry of Science, ICT and Future Planning as Global Frontier Project (CAMM-No. NRF-2014M3A6B3063716). This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2015R1A2A1A15054541). Experiments at PLS were supported in part by MEST and POSTECH.",

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AU - Park, Hyung Ho

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PY - 2016

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N2 - We investigated the effect of mesoporous structure on the thermoelectric properties of La-doped SrTiO3 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 SrTiO3 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 SrTiO3 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.

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