Suppressed intrinsic excitation and enhanced thermoelectric performance in Ag: XBi0.5Sb1.5- xTe3

doi:10.1039/c7tc04573e

	Suppressed intrinsic excitation and enhanced thermoelectric performance in Ag: XBi0.5Sb1.5- xTe3
	Xing, Tong 1,2; Liu, Ruiheng 1; Hao, Feng 1,2; Qiu, Pengfei 1; Ren, Dudi 1; Shi, Xun 1; Chen, Lidong 1
刊名	Journal of Materials Chemistry C
	2017
卷号	5 期号:47 页码:12619-12628
ISSN号	20507534
DOI	10.1039/c7tc04573e
英文摘要	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.
内容类型	期刊论文
源URL	[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
推荐引用方式 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.