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The role of electronegativity in the thermoelectric performance of GeTe-I-V-VI2 solid solutions

文献类型：期刊论文

作者Li, Nanhai3,4; He, Wenlu3; Li, Chengjun3; Wang, Guiwen2; Wang, Guoyu4; Zhou, Xiaoyuan2,3; Lu, Xu1,3
刊名JOURNAL OF MATERIALS CHEMISTRY A
出版日期2021-01-28
卷号9期号:4页码:2385-2393
ISSN号2050-7488
DOI10.1039/d0ta10268g
通讯作者Wang, Guoyu(guoyuw@cigit.ac.cn) ; Zhou, Xiaoyuan(xiaoyuan2013@cqu.edu.cn) ; Lu, Xu(luxu@cqu.edu.cn)
英文摘要GeTe-based solid solutions, exemplified by GeTe-AgSbTe2 (TAGS), have revealed superior thermoelectric performance in the past few decades. Recently, alloying GeTe with other compounds in the I-V-VI2 family has been employed as an effective means to further enhance figures-of-merit. The following work has systematically investigated the alloying effect of I-V-VI2 compounds (I = Cu and Na; V = Sb and Bi; VI = Te) on the thermoelectric performance of GeTe. It has been found that all these alloying compounds can synergistically optimize the carrier concentration and reduce lattice thermal conductivity, which boosts the figure-of-merit for GeTe. More importantly, this work has demonstrated that the electronegativity difference between group I elements and Ge determines the alloy scattering potential and thus carrier mobility. As a result, compounds with nominal compositions of (GeTe)(0.92)(NaSbTe2)(0.08) and (GeTe)(0.92)(CuSbTe2)(0.08) have achieved zTs of similar to 1.30 and 1.58 at 773 K, respectively. Our work highlights the importance of electronegativity in thermoelectric GeTe-based solid solutions and thus provides valuable guidance for designing novel thermoelectric materials.
资助项目National Natural Science Foundation of China[51772035] ; National Natural Science Foundation of China[11674040] ; National Natural Science Foundation of China[51672270] ; National Natural Science Foundation of China[11874356] ; National Natural Science Foundation of China[51877023] ; Chongqing Entrepreneurship and Innovation Program for the Returned Overseas Chinese Scholars[cx2019002] ; Project for Fundamental and Frontier Research in Chongqing[CSTC2017JCYJAX0388]
WOS研究方向Chemistry ; Energy & Fuels ; Materials Science
语种英语
WOS记录号WOS:000614172600040
出版者ROYAL SOC CHEMISTRY
源URL[http://119.78.100.138/handle/2HOD01W0/12796]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Wang, Guoyu; Zhou, Xiaoyuan; Lu, Xu
作者单位1.Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 400030, Peoples R China
2.Chongqing Univ, Analyt & Testing Ctr, Chongqing 401331, Peoples R China
3.Chongqing Univ, Coll Phys, Chongqing Key Lab Soft Condensed Matter Phys & Sm, Chongqing 401331, Peoples R China
4.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
推荐引用方式
GB/T 7714		 Li, Nanhai,He, Wenlu,Li, Chengjun,et al. The role of electronegativity in the thermoelectric performance of GeTe-I-V-VI2 solid solutions[J]. JOURNAL OF MATERIALS CHEMISTRY A,2021,9(4):2385-2393.
APA Li, Nanhai.,He, Wenlu.,Li, Chengjun.,Wang, Guiwen.,Wang, Guoyu.,...&Lu, Xu.(2021).The role of electronegativity in the thermoelectric performance of GeTe-I-V-VI2 solid solutions.JOURNAL OF MATERIALS CHEMISTRY A,9(4),2385-2393.
MLA Li, Nanhai,et al."The role of electronegativity in the thermoelectric performance of GeTe-I-V-VI2 solid solutions".JOURNAL OF MATERIALS CHEMISTRY A 9.4(2021):2385-2393.

入库方式： OAI收割

来源：重庆绿色智能技术研究院

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