Ultrahigh Thermoelectric Performance in SrNb0.2Ti0.8O3 Oxide Films at a Submicrometer-Scale Thickness

doi:10.1021/acsenergylett.7b00197

	Ultrahigh Thermoelectric Performance in SrNb0.2Ti0.8O3 Oxide Films at a Submicrometer-Scale Thickness
	Chen, Jikun 1,2,3; Chen, Hongyi 2; Hao, Feng 2; Ke, Xinyou 4; Chen, Nuofu 5; Yajima, Takeaki 3; Jiang, Yong 1; Shi, Xun 2; Zhou, Kexiong 2; Döbeli, Max 6
刊名	ACS Energy Letters
	2017
卷号	2 期号:4 页码:915-921
DOI	10.1021/acsenergylett.7b00197
英文摘要	Localized refrigeration and power generation via thermoelectric technology rely on efficient thermoelectric materials with high performance at room temperature. Although the two-dimensional electron gas (2DEG)-related materials exhibit ultrahigh thermoelectric performance near room temperature, such performance is only preserved at thicknesses within subnanometer scales, limited by the requirement of two-dimensional size confinements. Here we report ultrahigh thermoelectric performance similar to 2DEG-related materials but achieved in SrNb0.2Ti0.8O3 oxide films with a submicrometer-scale thickness by regulating strain-induced lattice polarizations and interfacial polarizations. A large figure of merit, zT, and power factor (∼102-103 μW cm-1 K-2) were achieved near room temperature, and the maximum zT is estimated to be ∼1.6 for a 49 nm thick film. These performances exceed those of the existing n-type thermoelectric materials for room-temperature uses and the reported best oxide materials beyond subnanometer scales. The earth-abundant elemental composition of the oxide film paves the way toward potential applications in thermoelectric thin film devices with a microscale thickness. © 2017 American Chemical Society.
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/25919]
专题	中国科学院上海硅酸盐研究所
作者单位	1.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing; 100083, China; 2.Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China; 3.School of Engineering, University of Tokyo, Tokyo; 1138656, Japan; 4.John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge; MA; 02138, United States; 5.School of Renewable Energy, North China Electric Power University, Beijing; 102206, China; 6.Ion Beam Physics, ETH Zurich, Zurich; CH-8093, Switzerland; 7.Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing; 100190, China; 8.Center for High Pressure Science and Technology Advanced Research, Shanghai; 201203, China; 9.Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing; 100081, China
推荐引用方式 GB/T 7714	Chen, Jikun,Chen, Hongyi,Hao, Feng,et al. Ultrahigh Thermoelectric Performance in SrNb0.2Ti0.8O3 Oxide Films at a Submicrometer-Scale Thickness[J]. ACS Energy Letters,2017,2(4):915-921.
APA	Chen, Jikun.,Chen, Hongyi.,Hao, Feng.,Ke, Xinyou.,Chen, Nuofu.,...&Chen, Lidong.(2017).Ultrahigh Thermoelectric Performance in SrNb0.2Ti0.8O3 Oxide Films at a Submicrometer-Scale Thickness.ACS Energy Letters,2(4),915-921.
MLA	Chen, Jikun,et al."Ultrahigh Thermoelectric Performance in SrNb0.2Ti0.8O3 Oxide Films at a Submicrometer-Scale Thickness".ACS Energy Letters 2.4(2017):915-921.