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Ultrahigh Thermoelectric Performance in SrNb0.2Ti0.8O3 Oxide Films at a Submicrometer-Scale Thickness
Chen, Jikun1,2,3; Chen, Hongyi2; Hao, Feng2; Ke, Xinyou4; Chen, Nuofu5; Yajima, Takeaki3; Jiang, Yong1; Shi, Xun2; Zhou, Kexiong2; Döbeli, Max6; Zhang, Tiansong2; Ge, Binghui7; Dong, Hongliang8; Zeng, Huarong2; Wu, Wenwang9; Chen, Lidong2
2017
Source PublicationACS Energy Letters
Volume2Issue:4Pages:915-921
AbstractLocalized 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.
DOI10.1021/acsenergylett.7b00197
EI Accession Number20183905864847
EI KeywordsOxide films
EI Classification Number615.4 Thermoelectric Energy - 701.1 Electricity: Basic Concepts and Phenomena - 714.2 Semiconductor Devices and Integrated Circuits
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25919
Collection中国科学院上海硅酸盐研究所
Affiliation1.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
Recommended Citation
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.
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