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Suppressed intrinsic excitation and enhanced thermoelectric performance in Ag: XBi0.5Sb1.5- xTe3
Xing, Tong1,2; Liu, Ruiheng1; Hao, Feng1,2; Qiu, Pengfei1; Ren, Dudi1; Shi, Xun1; Chen, Lidong1
2017
发表期刊Journal of Materials Chemistry C
ISSN20507534
卷号5期号:47页码:12619-12628
摘要Bi2Te3-based alloys are the most well-known thermoelectric materials for roomerature applications. However, the maximum ZT values of Bi2Te3-based materials are usually achieved near room temperature. The ZT values dramatically drop above 400 K because of the intrinsic thermal excitation in Bi2Te3-based materials, which seriously restricts their applications as thermoelectric power generators. In this study, by doping a tiny amount of Ag into Bi0.5Sb1.5Te3, we successfully suppressed the intrinsic excitation in p-type Bi2Te3-based materials and shifted the ZT peak temperature to high temperatures. Eventually, due to the enhanced power factor and greatly depressed bipolar thermal conductivity at high temperature, a maximum ZT of 1.25 at 400 K was obtained in Ag0.002Bi0.5Sb1.498Te3, and an average ZT value of approximately 1.03 was achieved between 300 and 600 K. The theoretical energy conversion efficiency of the TE module fabricated with Ag0.002Bi0.5Sb1.498Te3achieves a maximum value of 11.0% when ΔT = 300 K, which makes p-type Bi2Te3-based devices attractive for applications in TE power generation. © 2017 The Royal Society of Chemistry.
DOI10.1039/c7tc04573e
EI入藏号20175104560630
EI主题词Thermal conductivity
EI分类号525.5 Energy Conversion Issues - 615.4 Thermoelectric Energy - 641.1 Thermodynamics - 701.1 Electricity: Basic Concepts and Phenomena
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文献类型期刊论文
条目标识符http://ir.sic.ac.cn/handle/331005/25616
专题中国科学院上海硅酸盐研究所
作者单位1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
2.University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing; 100049, China
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GB/T 7714
Xing, Tong,Liu, Ruiheng,Hao, Feng,et al. Suppressed intrinsic excitation and enhanced thermoelectric performance in Ag: XBi0.5Sb1.5- xTe3[J]. Journal of Materials Chemistry C,2017,5(47):12619-12628.
APA Xing, Tong.,Liu, Ruiheng.,Hao, Feng.,Qiu, Pengfei.,Ren, Dudi.,...&Chen, Lidong.(2017).Suppressed intrinsic excitation and enhanced thermoelectric performance in Ag: XBi0.5Sb1.5- xTe3.Journal of Materials Chemistry C,5(47),12619-12628.
MLA Xing, Tong,et al."Suppressed intrinsic excitation and enhanced thermoelectric performance in Ag: XBi0.5Sb1.5- xTe3".Journal of Materials Chemistry C 5.47(2017):12619-12628.
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