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Achieving higher thermoelectric performance for p-type Cr2Ge2Te6 via optimizing doping

文献类型：期刊论文

作者Tang, Xiaodan1,2; Fan, Dengdong3; Guo, Lijie1; Tan, Huan1; Wang, Shuxia1; Lu, Xu1; Cao, Xianlong4; Wang, Guoyu2; Zhou, Xiaoyuan1
刊名APPLIED PHYSICS LETTERS
出版日期2018-12-24
卷号113期号:26页码:5
ISSN号0003-6951
DOI10.1063/1.5064787
通讯作者Cao, Xianlong(xianlong@cqust.edu.cn) ; Zhou, Xiaoyuan(xiaoyuan2013@cqu.edu.cn)
英文摘要Cr2Ge2Te6-based compounds with a layered structure and high symmetry hold a great promise for thermoelectric applications. Our studies have been committed to improve their electrical properties considering the low power factor of only similar to 0.23 mW/mK(2) in pristine samples. In this work, various doping contents on the site that has less influence on the charge-conducting band have been investigated to enhance the power factor. The results show that Fe-doping is the most favorable among elements we applied. According to the first-principles calculation, the Fe doping on the Cr site leads to the increment of the density of states around the Fermi level. By tuning the carrier concentration via Fe doping, the peak power factor rises from 0.23 mW/mK(2) to 0.37 mW/mK(2) and zT rises from 0.3 to 0.4 at 830K for Cr1.9Fe0.1Ge2Te6 along the pressing direction. These results shed lights for designing high performance thermoelectric materials. Published by AIP Publishing.
资助项目National Natural Science Foundation of China[11344010] ; National Natural Science Foundation of China[11404044] ; National Natural Science Foundation of China[51472036] ; National Natural Science Foundation of China[51772035] ; Fundamental Research Funds for the Central Universities[CQDXWL-2013-Z010] ; Fundamental Research Funds for the Central Universities[106112017CDJQJ308821] ; Fundamental Research Funds for the Central Universities[2018CDJDWL0011] ; Frontier Research Program[cstc2015jcyjBX0026] ; Chongqing Foundation
WOS研究方向Physics
语种英语
WOS记录号WOS:000454616700034
出版者AMER INST PHYSICS
源URL[http://119.78.100.138/handle/2HOD01W0/7246]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Cao, Xianlong; Zhou, Xiaoyuan
作者单位1.Chongqing Univ, Coll Phys, Chongqing Key Lab Soft Condensed Matter Phys & Sm, Chongqing 401331, Peoples R China
2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
3.Wuhan Univ, Minist Educ, Key Lab Artificial Micro & Nanostruct, Wuhan 430072, Peoples R China
4.Chongqing Univ Sci & Technol, Sch Met & Mat Engn, Chongqing 401331, Peoples R China
推荐引用方式
GB/T 7714		 Tang, Xiaodan,Fan, Dengdong,Guo, Lijie,et al. Achieving higher thermoelectric performance for p-type Cr2Ge2Te6 via optimizing doping[J]. APPLIED PHYSICS LETTERS,2018,113(26):5.
APA Tang, Xiaodan.,Fan, Dengdong.,Guo, Lijie.,Tan, Huan.,Wang, Shuxia.,...&Zhou, Xiaoyuan.(2018).Achieving higher thermoelectric performance for p-type Cr2Ge2Te6 via optimizing doping.APPLIED PHYSICS LETTERS,113(26),5.
MLA Tang, Xiaodan,et al."Achieving higher thermoelectric performance for p-type Cr2Ge2Te6 via optimizing doping".APPLIED PHYSICS LETTERS 113.26(2018):5.

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来源：重庆绿色智能技术研究院

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