Enhancement of Seebeck coefficient of mesoporous SrTiO 3 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 journalArticle

4 Citations (Scopus)

Abstract

The carrier concentration and effective mass of mesoporous SrTiO 3 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 SrTiO 3 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 SrTiO 3 film induced an increase in the figure of merit value, which was due to increases in both the effective mass and carrier concentration.

Original languageEnglish
Pages (from-to)125-130
Number of pages6
JournalJournal of the European Ceramic Society
Volume38
Issue number1
DOIs
Publication statusPublished - 2018 Jan 1

Fingerprint

Seebeck coefficient
Carrier concentration
Substitution reactions
Electronic density of states
Bond length
Fermi level
Structural properties
Electric properties

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

@article{befec3deb82b4068ad140132902c4eb2,
title = "Enhancement of Seebeck coefficient of mesoporous SrTiO 3 with V-group elements V, Nb, and Ta substituted for Ti",
abstract = "The carrier concentration and effective mass of mesoporous SrTiO 3 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 SrTiO 3 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 SrTiO 3 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 Hyung-Ho Park",
year = "2018",
month = "1",
day = "1",
doi = "10.1016/j.jeurceramsoc.2017.08.021",
language = "English",
volume = "38",
pages = "125--130",
journal = "Journal of the European Ceramic Society",
issn = "0955-2219",
publisher = "Elsevier BV",
number = "1",

}

Enhancement of Seebeck coefficient of mesoporous SrTiO 3 with V-group elements V, Nb, and Ta substituted for Ti . / Park, Chang Sun; Hong, Min Hee; Cho, Hyung Hee; Park, Hyung-Ho.

In: Journal of the European Ceramic Society, Vol. 38, No. 1, 01.01.2018, p. 125-130.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Enhancement of Seebeck coefficient of mesoporous SrTiO 3 with V-group elements V, Nb, and Ta substituted for Ti

AU - Park, Chang Sun

AU - Hong, Min Hee

AU - Cho, Hyung Hee

AU - Park, Hyung-Ho

PY - 2018/1/1

Y1 - 2018/1/1

N2 - The carrier concentration and effective mass of mesoporous SrTiO 3 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 SrTiO 3 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 SrTiO 3 film induced an increase in the figure of merit value, which was due to increases in both the effective mass and carrier concentration.

AB - The carrier concentration and effective mass of mesoporous SrTiO 3 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 SrTiO 3 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 SrTiO 3 film induced an increase in the figure of merit value, which was due to increases in both the effective mass and carrier concentration.

UR - http://www.scopus.com/inward/record.url?scp=85028356351&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85028356351&partnerID=8YFLogxK

U2 - 10.1016/j.jeurceramsoc.2017.08.021

DO - 10.1016/j.jeurceramsoc.2017.08.021

M3 - Article

AN - SCOPUS:85028356351

VL - 38

SP - 125

EP - 130

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

SN - 0955-2219

IS - 1

ER -