Thermoelectric properties of Cu2Se1-xTex solid solutions

doi:10.1039/c8ta01313f

	Thermoelectric properties of Cu2Se1-xTex solid solutions
	Zhao, Kunpeng 1; Guan, Mengjia 1; Qiu, Pengfei ; Blichfeld, Anders B.; Eikeland, Espen ; Zhu, Chenxi ; Ren, Dudi ; Xu, Fangfang ; Iversen, Bo B.; Shi, Xun
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2018
卷号	6 期号:16 页码:6977
ISSN号	2050-7488
DOI	10.1039/c8ta01313f
英文摘要	Binary Cu2Se and Cu2Te have gained great attention recently because of their interesting and abnormal physical properties, such as ultralow thermal conductivity, high carrier mobility, large effective mass of carriers and excellent thermoelectric performance. In this study, we find that these two compounds are completely miscible throughout the studied composition range. The trigonal structure of Cu2Se is maintained when the Te content x is 0.2, but a new trigonal structure is formed when the Te content x is between 0.3 and 0.7. The carrier concentration is greatly improved when increasing the Te content in Cu2Se1-xTex solid solutions, resulting in a much reduced electrical resistivity and Seebeck coefficient in the whole temperature range as compared with those of binary Cu2Se. The total thermal conductivity is inversely increased due to the contribution from enhanced carrier thermal conductivity. As a result, the overall thermoelectric performance of Cu2Se1-xTex solid solutions lies between Cu2Se and Cu2Te. We also find that the quality factor of Cu2Se1-xTex is higher than those of most typical thermoelectric materials. Thus the thermoelectric performance can be further improved if the intrinsically high hole carrier concentrations can be reduced in Cu2Se1-xTex.
学科主题	Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000431003600028
资助机构	This work was supported by the National Natural Science Foundation of China (NSFC) under Grant No. 51625205, Key Research Program of Chinese Academy of Sciences (Grant No. KFZD-SW-421), and Shanghai Government (Grant No. 16520721400 and 16XD1403900). F. X. thanks National Natural Science Foundation of China (NSFC) for funding under Project No. 51672296. B. B. Iversen is thankful for the support by the Danish National Research Foundation (Center for Materials Crystallography, DNRF93), and the Danish Center for Synchrotron and Neutron Research (Danscatt). ; This work was supported by the National Natural Science Foundation of China (NSFC) under Grant No. 51625205, Key Research Program of Chinese Academy of Sciences (Grant No. KFZD-SW-421), and Shanghai Government (Grant No. 16520721400 and 16XD1403900). F. X. thanks National Natural Science Foundation of China (NSFC) for funding under Project No. 51672296. B. B. Iversen is thankful for the support by the Danish National Research Foundation (Center for Materials Crystallography, DNRF93), and the Danish Center for Synchrotron and Neutron Research (Danscatt).
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/24971]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Blichfeld, Anders B.; Eikeland, Espen; Iversen, Bo B.] Aarhus Univ, Dept Chem, iNANO, Ctr Mat Crystallog, Langelandsgade 140, DK-8000 Aarhus C, Denmark 4.Blichfeld, Anders B.] Norwegian Univ Sci & Technol, Dept Mat Sci & Engn, N-7491 Trondheim, Norway
推荐引用方式 GB/T 7714	Zhao, Kunpeng,Guan, Mengjia,Qiu, Pengfei,et al. Thermoelectric properties of Cu2Se1-xTex solid solutions[J]. JOURNAL OF MATERIALS CHEMISTRY A,2018,6(16):6977, 6986.
APA	Zhao, Kunpeng.,Guan, Mengjia.,Qiu, Pengfei.,Blichfeld, Anders B..,Eikeland, Espen.,...&Chen, Lidong.(2018).Thermoelectric properties of Cu2Se1-xTex solid solutions.JOURNAL OF MATERIALS CHEMISTRY A,6(16),6977.
MLA	Zhao, Kunpeng,et al."Thermoelectric properties of Cu2Se1-xTex solid solutions".JOURNAL OF MATERIALS CHEMISTRY A 6.16(2018):6977.