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

被引：21

作者：

Park, Chang-Sun ^{[1
]}

Hong, Min-Hee ^{[1
]}

Cho, Hyung Hee ^{[2
]}

Park, Hyung-Ho ^{[1
]}

机构：

[1] Yonsei Univ, Dept Mat Sci & Engn, 50 Yonseri Ro, Seoul 03722, South Korea

[2] Yonsei Univ, Sch Mech Engn, Seoul 03722, South Korea

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2018年 / 38卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

Thermoelectric; Seebeck coefficient; Strontium titanate; Mesoporous; V-group elements; THERMOELECTRIC PROPERTIES; THERMAL-CONDUCTIVITY; TRANSPORT; FILMS; LA;

D O I：

10.1016/j.jeurceramsoc.2017.08.021

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页码：125 / 130

页数：6

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