Enhancement of Seebeck coefficient of mesoporous SrTiO3 with V-group elements V, Nb, and Ta substituted for Ti

Chang Sun Park; Min Hee Hong; Hyung Hee Cho; Hyung Ho Park

doi:10.1016/j.jeurceramsoc.2017.08.021

Enhancement of Seebeck coefficient of mesoporous SrTiO₃ with V-group elements V, Nb, and Ta substituted for Ti

Chang Sun Park, Min Hee Hong, Hyung Hee Cho, Hyung Ho Park

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

19 Citations (Scopus)

Abstract

The carrier concentration and effective mass of mesoporous SrTiO₃ films were controlled by the substitution of Ti with V-group elements (V, Nb, and Ta) to enhance the thermoelectric properties. We calculated the effect of the substitution on the effective mass of SrTiO₃ by analyzing its structural and electrical properties. When V was used as a substitute, the effective mass increased slightly due to a small change in the V–O bond distance. Moreover, when Nb and Ta were used as substitutes, the effective mass increased owing to an increase in the electronic density of states near the fermi level due to the increased bond length of Nb(or Ta)–O. Consequently, the use of Nb and Ta as substitutes in the SrTiO₃ film induced an increase in the figure of merit value, which was due to increases in both the effective mass and carrier concentration.

Original language	English
Pages (from-to)	125-130
Number of pages	6
Journal	Journal of the European Ceramic Society
Volume	38
Issue number	1
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2017.08.021
Publication status	Published - 2018 Jan

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant, funded by the Korea government (MSIP) (No. 2015R1A2A1A15054541). This research was also supported by Basic Science Research Program through the NRF, funded by the Ministry of Education (2015R1D1A1A02062229). This work was supported by the Human Resource Development program (No. 20174030201720) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), grant funded by the Korea government Ministry of Trade. The experiments at PLS were supported by MEST and POSTECH.

Publisher Copyright:
© 2017 Elsevier Ltd

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

Access to Document

10.1016/j.jeurceramsoc.2017.08.021

Cite this

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title = "Enhancement of Seebeck coefficient of mesoporous SrTiO3 with V-group elements V, Nb, and Ta substituted for Ti",

abstract = "The carrier concentration and effective mass of mesoporous SrTiO3 films were controlled by the substitution of Ti with V-group elements (V, Nb, and Ta) to enhance the thermoelectric properties. We calculated the effect of the substitution on the effective mass of SrTiO3 by analyzing its structural and electrical properties. When V was used as a substitute, the effective mass increased slightly due to a small change in the V–O bond distance. Moreover, when Nb and Ta were used as substitutes, the effective mass increased owing to an increase in the electronic density of states near the fermi level due to the increased bond length of Nb(or Ta)–O. Consequently, the use of Nb and Ta as substitutes in the SrTiO3 film induced an increase in the figure of merit value, which was due to increases in both the effective mass and carrier concentration.",

author = "Park, {Chang Sun} and Hong, {Min Hee} and Cho, {Hyung Hee} and Park, {Hyung Ho}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant, funded by the Korea government (MSIP) (No. 2015R1A2A1A15054541). This research was also supported by Basic Science Research Program through the NRF, funded by the Ministry of Education (2015R1D1A1A02062229). This work was supported by the Human Resource Development program (No. 20174030201720) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), grant funded by the Korea government Ministry of Trade. The experiments at PLS were supported by MEST and POSTECH. Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

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AU - Park, Hyung Ho

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant, funded by the Korea government (MSIP) (No. 2015R1A2A1A15054541). This research was also supported by Basic Science Research Program through the NRF, funded by the Ministry of Education (2015R1D1A1A02062229). This work was supported by the Human Resource Development program (No. 20174030201720) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), grant funded by the Korea government Ministry of Trade. The experiments at PLS were supported by MEST and POSTECH. Publisher Copyright: © 2017 Elsevier Ltd

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N2 - The carrier concentration and effective mass of mesoporous SrTiO3 films were controlled by the substitution of Ti with V-group elements (V, Nb, and Ta) to enhance the thermoelectric properties. We calculated the effect of the substitution on the effective mass of SrTiO3 by analyzing its structural and electrical properties. When V was used as a substitute, the effective mass increased slightly due to a small change in the V–O bond distance. Moreover, when Nb and Ta were used as substitutes, the effective mass increased owing to an increase in the electronic density of states near the fermi level due to the increased bond length of Nb(or Ta)–O. Consequently, the use of Nb and Ta as substitutes in the SrTiO3 film induced an increase in the figure of merit value, which was due to increases in both the effective mass and carrier concentration.

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