Enhanced thermoelectric properties of YbZn2Sb2−xBix through a synergistic effect via Bi-doping

doi:10.1016/j.cej.2019.05.206

CORC > 重庆绿色智能技术研究院 > 中国科学院重庆绿色智能技术研究院 > 机器人与3D打印技术创新中心

	Enhanced thermoelectric properties of YbZn2Sb2−xBix through a synergistic effect via Bi-doping
	Zhang, Xiong 1,3,5; Gu, Haoshuang 5; Zhang, Yu 1; Guo, Lijie 3; Yang, Juntao 1; Luo, Shijun 1; Lu, Xu 3; Chen, Kansong 5; Chai, Hongxiang 6; Wang, Guoyu 4
刊名	Chemical Engineering Journal
	2019
卷号	374 页码:589-595
ISSN号	13858947
DOI	10.1016/j.cej.2019.05.206
英文摘要	Recently, extensive research has been done to explore the potential thermoelectric performance of p-Type Zintl compounds AB2Sb2 (A = Ca, Yb, Eu, Sr, Mg; B = Zn, Mn, Cd, Mg), mainly focus on A-site substitution and/or B-site substitution effect. Herein, we report that both power factors and thermal conductivities are simultaneously optimized to increase ZT values via substitution of Sb atoms with the isoelectronic Bi atoms in YbZn2Sb2−xBix compounds. We found that the power factor could be enhanced by 27%, as a result of improved electrical conductivities and the maintained Seebeck coefficients. The former is obtained from an increase of carrier density through a shift of Fermi level via Bi doping, which is supported by XPS analysis. The Seebeck coefficients are maintained due to the increased effective mass. Moreover, the lowest lattice thermal conductivity (0.47 Wm−1 K−1 at 723K) is below the lattice thermal conductivity limit due to enhanced phonon scattering via Bi-doping, which is analyzed by the Callaway model. Benefiting from the synergistic effect, the ZT of Bi-doping samples are significantly enhanced compared with that of the pristine one. These results probably offer a synergistic strategy to enhance ZT for p-Type Zintl compounds AB2Sb2 and other high-efficiency thermoelectric materials. © 2019 Elsevier B.V.
语种	英语
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/9838]
专题	机器人与3D打印技术创新中心
作者单位	1.Hubei University of Automotive Technology, Shiyan; 442002, China; 2.Analytical and Testing Center, Chongqing University, Chongqing; 401331, China; 3.College of Physics, Chongqing University, Chongqing; 401331, China; 4.Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing; 400714, China; 5.Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials-Hubei Key, Laboratory of Ferro & Piezoelectric Materials and Devices, Faculty of Physical and Electronic, Sciences, Hubei University, Wuhan; 430062, China; 6.Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Urban Construction and Environmental Engineering, Chongqing University, Chongqing; 400045, China
推荐引用方式 GB/T 7714	Zhang, Xiong,Gu, Haoshuang,Zhang, Yu,et al. Enhanced thermoelectric properties of YbZn2Sb2−xBix through a synergistic effect via Bi-doping[J]. Chemical Engineering Journal,2019,374:589-595.
APA	Zhang, Xiong.,Gu, Haoshuang.,Zhang, Yu.,Guo, Lijie.,Yang, Juntao.,...&Zhou, Xiaoyuan.(2019).Enhanced thermoelectric properties of YbZn2Sb2−xBix through a synergistic effect via Bi-doping.Chemical Engineering Journal,374,589-595.
MLA	Zhang, Xiong,et al."Enhanced thermoelectric properties of YbZn2Sb2−xBix through a synergistic effect via Bi-doping".Chemical Engineering Journal 374(2019):589-595.