The Electrical and Thermal Transport Properties of La-Doped SrTiO3 with Sc2O3 Composite

Donor-doped strontium titanate (SrTiO3) is one of the most promising n-type oxide thermoelectric materials. Routine doping of La at Sr site can change the charge scattering mechanism, and meanwhile can significantly increase the power factor in the temperature range of 423–773...

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Autores principales:	Kai Guo, Fan Yang, Tianyao Weng, Jianguo Chen, Jiye Zhang, Jun Luo, Han Li, Guanghui Rao, Jingtai Zhao
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	strontium titanate rare earth doping composite thermal expansion lattice thermal conductivity Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/b75f6352f3d948a190aa6367f8a29cd1
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spelling	oai:doaj.org-article:b75f6352f3d948a190aa6367f8a29cd12021-11-11T17:51:16ZThe Electrical and Thermal Transport Properties of La-Doped SrTiO<sub>3</sub> with Sc<sub>2</sub>O<sub>3</sub> Composite10.3390/ma142162791996-1944https://doaj.org/article/b75f6352f3d948a190aa6367f8a29cd12021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6279https://doaj.org/toc/1996-1944Donor-doped strontium titanate (SrTiO<sub>3</sub>) is one of the most promising n-type oxide thermoelectric materials. Routine doping of La at Sr site can change the charge scattering mechanism, and meanwhile can significantly increase the power factor in the temperature range of 423–773 K. In addition, the introduction of Sc partially substitutes Sr, thus further increasing the electron concentration and optimizing the electrical transport properties. Moreover, the excess Sc in the form of Sc<sub>2</sub>O<sub>3</sub> composite suppresses multifrequency phonon transport, leading to low thermal conductivity of <i>κ</i> = 3.78 W·m<sup>−1</sup>·K<sup>−1</sup> at 773 K for sample Sr<sub>0.88</sub>La<sub>0.06</sub>Sc<sub>0.06</sub>TiO<sub>3</sub> with the highest doping content. Thus, the thermoelectric performance of SrTiO<sub>3</sub> can be significantly enhanced by synergistic optimization of electrical transport and thermal transport properties via cation doping and composite engineering.Kai GuoFan YangTianyao WengJianguo ChenJiye ZhangJun LuoHan LiGuanghui RaoJingtai ZhaoMDPI AGarticlestrontium titanaterare earth dopingcompositethermal expansionlattice thermal conductivityTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6279, p 6279 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	strontium titanate rare earth doping composite thermal expansion lattice thermal conductivity Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	strontium titanate rare earth doping composite thermal expansion lattice thermal conductivity Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Kai Guo Fan Yang Tianyao Weng Jianguo Chen Jiye Zhang Jun Luo Han Li Guanghui Rao Jingtai Zhao The Electrical and Thermal Transport Properties of La-Doped SrTiO<sub>3</sub> with Sc<sub>2</sub>O<sub>3</sub> Composite
description	Donor-doped strontium titanate (SrTiO<sub>3</sub>) is one of the most promising n-type oxide thermoelectric materials. Routine doping of La at Sr site can change the charge scattering mechanism, and meanwhile can significantly increase the power factor in the temperature range of 423–773 K. In addition, the introduction of Sc partially substitutes Sr, thus further increasing the electron concentration and optimizing the electrical transport properties. Moreover, the excess Sc in the form of Sc<sub>2</sub>O<sub>3</sub> composite suppresses multifrequency phonon transport, leading to low thermal conductivity of <i>κ</i> = 3.78 W·m<sup>−1</sup>·K<sup>−1</sup> at 773 K for sample Sr<sub>0.88</sub>La<sub>0.06</sub>Sc<sub>0.06</sub>TiO<sub>3</sub> with the highest doping content. Thus, the thermoelectric performance of SrTiO<sub>3</sub> can be significantly enhanced by synergistic optimization of electrical transport and thermal transport properties via cation doping and composite engineering.
format	article
author	Kai Guo Fan Yang Tianyao Weng Jianguo Chen Jiye Zhang Jun Luo Han Li Guanghui Rao Jingtai Zhao
author_facet	Kai Guo Fan Yang Tianyao Weng Jianguo Chen Jiye Zhang Jun Luo Han Li Guanghui Rao Jingtai Zhao
author_sort	Kai Guo
title	The Electrical and Thermal Transport Properties of La-Doped SrTiO<sub>3</sub> with Sc<sub>2</sub>O<sub>3</sub> Composite
title_short	The Electrical and Thermal Transport Properties of La-Doped SrTiO<sub>3</sub> with Sc<sub>2</sub>O<sub>3</sub> Composite
title_full	The Electrical and Thermal Transport Properties of La-Doped SrTiO<sub>3</sub> with Sc<sub>2</sub>O<sub>3</sub> Composite
title_fullStr	The Electrical and Thermal Transport Properties of La-Doped SrTiO<sub>3</sub> with Sc<sub>2</sub>O<sub>3</sub> Composite
title_full_unstemmed	The Electrical and Thermal Transport Properties of La-Doped SrTiO<sub>3</sub> with Sc<sub>2</sub>O<sub>3</sub> Composite
title_sort	electrical and thermal transport properties of la-doped srtio<sub>3</sub> with sc<sub>2</sub>o<sub>3</sub> composite
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/b75f6352f3d948a190aa6367f8a29cd1
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The Electrical and Thermal Transport Properties of La-Doped SrTiO<sub>3</sub> with Sc<sub>2</sub>O<sub>3</sub> Composite

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