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

doi:10.1016/j.cej.2019.05.206

	Enhanced thermoelectric properties of YbZn2Sb2-xBix through a synergistic effect via Bi-doping
	Zhang, Xiong 3,4,6; Gu, Haoshuang 4; Zhang, Yu 3; Guo, Lijie 6; Yang, Juntao 3; Luo, Shijun 3; Lu, Xu 6; Chen, Kansong 4; Chai, Hongxiang 1; Wang, Guoyu2
刊名	CHEMICAL ENGINEERING JOURNAL
	2019-10-15
卷号	374 页码:589-595
关键词	Zintl compounds Thermoelectric Fermi level Effective mass Callaway model
ISSN号	1385-8947
DOI	10.1016/j.cej.2019.05.206
通讯作者	Wang, Guoyu(guoyuw@cigit.ac.cn) ; Zhang, Xiao(seashellemma@163.com) ; Zhou, Xiaoyuan(xiaoyuan2013@cqu.edu.cn)
英文摘要	Recently, extensive research has been done to explore the potential thermoelectric performance of p-Type Zintl compounds AB(2)Sb(2) (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 AB(2)Sb(2) and other high-efficiency thermoelectric materials.
资助项目	National Natural Science Foundation of China[51672270] ; National Natural Science Foundation of China[51401202] ; National Natural Science Foundation of China[51472036] ; National Natural Science Foundation of China[51772035] ; National Natural Science Foundation of China[11604032] ; National Natural Science Foundation of China[11674040] ; National Natural Science Foundation of China[11874356] ; Fundamental Research Funds for the Central Universities[2018CDQYWL0048] ; Fundamental Research Funds for the Central Universities[2018CDPTCG0001/26] ; Fundamental Research Funds for the Central Universities[106112017CDJQJ308821] ; Fundamental Research Funds for the Central Universities[2018CDJDWL0011] ; Natural Science Foundation of Hubei Provincial Department of Education[D20171803]
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000477652900053
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/8308]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Wang, Guoyu; Zhang, Xiao; Zhou, Xiaoyuan
作者单位	1.Chongqing Univ, Sch Urban Construct & Environm Engn, Minist Educ, Key Lab Ecoenvironm Three Gorges Reservoir Reg, Chongqing 400045, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 3.Hubei Univ Automot Technol, Shiyan 442002, Peoples R China 4.Hubei Univ, Lab Ferro & Piezoelectr Mat & Devices, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat H, Fac Phys & Elect,Sci, Wuhan 430062, Hubei, Peoples R China 5.Chongqing Univ, Analyt & Testing Ctr, Chongqing 401331, Peoples R China 6.Chongqing Univ, Coll Phys, Chongqing 401331, Peoples R 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.