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Decreased order-disorder transition temperature and enhanced phonon scattering in Ag-alloyed Cu3SbSe3

文献类型：期刊论文

作者Dai, Lu1,5; Wang, Zhiran1,5; Huo, Yufeng1,5; Huang, Yuling6; Wang, Guiwen3; Fan, Lizhu2,6; Chen, Peng1,5; Han, Guang4; Lu, Xu2; Zhang, Bin3
刊名JOURNAL OF ALLOYS AND COMPOUNDS
出版日期2022-10-25
卷号919页码:7
ISSN号0925-8388
关键词Thermoelectric Cu3SbSe3 Lattice thermal conductivity Phase transition Ag-alloying
DOI10.1016/j.jallcom.2022.165829
通讯作者Zhang, Bin(xinyun2017@cqu.edu.cn) ; Wang, Guoyu(guoyuw@cigit.ac.cn)
英文摘要Cu3SbSe3 is a promising thermoelectric material with ultralow lattice thermal conductivity, especially at temperatures above 450 K at which the order-disorder transition of copper ions takes place. To investigate whether the high-temperature disordered phase can be extended to lower temperature, a series of Ag-alloyed Cu3-xAgxSbSe3 (x = 0, 0.1, 0.2 and 0.3) polycrystalline samples were synthesized and characterized in this work. It was found that the Ag-alloying shifts the order-disorder transition temperature to lower ones, which is beneficial to the thermoelectric application of Cu3SbSe3. For thermal transport, Ag-alloying is effective in suppressing lattice thermal conductivity in the copper-ions-ordered region, while in the copper-ions-disordered region, Ag-alloying barely has any effect on lattice thermal conductivity, as the phonon scattering is dominated by the liquid-like behavior of copper ions. Although Ag and Cu atoms have the same valence electron number, the carrier concentration is slightly increased after Ag-alloying, which suppresses the bipolar effect and increases the Seebeck coefficient at high temperatures. Finally, a maximum zT of 0.34 is obtained at 652 K for the sample Cu2.7Ag0.3SbSe3, which is 161% higher than that of the pristine sample. (c) 2022 Elsevier B.V. All rights reserved.
资助项目National Natural Science Foundation of China[11874356] ; National Natural Science Foundation of China[U21A2054] ; National Natural Science Foundation of China[52071041] ; National Natural Science Foundation of China[51772035] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH016] ; Project for Fundamental and Frontier Research in Chongqing[cstc2019jcyjjqX0002]
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
出版者ELSEVIER SCIENCE SA
WOS记录号WOS:000816147000003
源URL[http://119.78.100.138/handle/2HOD01W0/15985]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Zhang, Bin; Wang, Guoyu
作者单位1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
2.Chongqing Univ, Coll Phys, Chongqing 401331, Peoples R China
3.Chongqing Univ, Analyt & Testing Ctr, Chongqing 401331, Peoples R China
4.Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100044, Peoples R China
6.Chongqing Univ, Inst Adv Interdisciplinary Studies, Chongqing 401331, Peoples R China
推荐引用方式
GB/T 7714		 Dai, Lu,Wang, Zhiran,Huo, Yufeng,et al. Decreased order-disorder transition temperature and enhanced phonon scattering in Ag-alloyed Cu3SbSe3[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2022,919:7.
APA Dai, Lu.,Wang, Zhiran.,Huo, Yufeng.,Huang, Yuling.,Wang, Guiwen.,...&Wang, Guoyu.(2022).Decreased order-disorder transition temperature and enhanced phonon scattering in Ag-alloyed Cu3SbSe3.JOURNAL OF ALLOYS AND COMPOUNDS,919,7.
MLA Dai, Lu,et al."Decreased order-disorder transition temperature and enhanced phonon scattering in Ag-alloyed Cu3SbSe3".JOURNAL OF ALLOYS AND COMPOUNDS 919(2022):7.

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来源：重庆绿色智能技术研究院

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