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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
Source PublicationJournal of Materials Chemistry C
ISSN20507534
Volume5Issue:47Pages:12619-12628
AbstractBi2Te3-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 Accession Number20175104560630
EI KeywordsThermal conductivity
EI Classification Number525.5 Energy Conversion Issues - 615.4 Thermoelectric Energy - 641.1 Thermodynamics - 701.1 Electricity: Basic Concepts and Phenomena
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25616
Collection中国科学院上海硅酸盐研究所
Affiliation1.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
Recommended Citation
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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