Realizing high thermoelectricity in polycrystalline tin sulfide via manipulating fermi surface anisotropy and phonon dispersion

doi:10.1016/j.mtphys.2020.100221

	Realizing high thermoelectricity in polycrystalline tin sulfide via manipulating fermi surface anisotropy and phonon dispersion
	Wu, H.2,3; Peng, K.2; Zhang, B.1; Gong, X. N.1; Feng, Z. Z.4; Zhang, X. M.4; Xi, M.2; Yan, X. M.2; Zhang, Y. S.4; Wang, G. Y.3
刊名	MATERIALS TODAY PHYSICS
	2020-08-01
卷号	14 页码:10
关键词	Thermoelectric SnS Fermi surface anisotropy Phonon dispersion Lattice dynamics
ISSN号	2542-5293
DOI	10.1016/j.mtphys.2020.100221
通讯作者	Wang, G. Y.(guoyuw@cigit.ac.cn) ; Lu, X.(luxu@cqu.edu.cn) ; Zhou, X. Y.(xiaoyuan2013@cqu.edu.cn)
英文摘要	Tin sulfide (SnS) with an analogous structure to SnSe has attracted increasing attentions owing to its low cost, earth abundance, and environmental compatibility. In this work, the thermoelectric properties of polycrystalline SnS1-xSex (0 <= x <= 0.5) are systematically investigated. With the assistance of the theoretical calculations and experimental results, the intrinsic characteristic of the markedly diminished lattice thermal conductivity with increasing Se alloying content is due to the decreased phonon vibration frequency associated with the reduced phonon group velocity and the strengthened phonon scattering. In addition, compared with SnS, the more localized Sn_5s(2) lone pair electrons in SnS0.5Se0.5 are propitious to strengthen the anisotropy of Fermi surface and lattice anharmonicity, leading to high quality factor (B). Finally, a highest zT value (similar to 1.1) at 820 K is obtained for Na0.02Sn0.98S0.5Se0.5 by optimizing the carrier concentration through Na doping. These results contribute to a comprehensive understanding of the modification of phonon dispersion and band structure of SnS-SnSe solid solutions and indicate their high thermoelectric performance in SnS-based materials. (C) 2020 Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundation of China[11604032] ; National Natural Science Foundation of China[11674040] ; National Natural Science Foundation of China[11874356] ; National Natural Science Foundation of China[51672270] ; National Natural Science Foundation of China[51772035] ; National Natural Science Foundation of China[11904348] ; Fundamental Research Funds for the Central Universities, China[2018CDQYWL0048] ; Fundamental Research Funds for the Central Universities, China[106112016CDJZR308808] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH016] ; Project for Fundamental and Frontier Research in Chongqing[CSTC2015JCYJBX0026] ; China Postdoctoral Science Foundation[2018M640585]
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000572900300002
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/11844]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Wang, G. Y.; Lu, X.; Zhou, X. Y.
作者单位	1.Chongqing Univ, Analyt & Testing Ctr, Chongqing 401331, Peoples R China 2.Chongqing Univ, Coll Phys, Chongqing 401331, Peoples R China 3.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 4.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Wu, H.,Peng, K.,Zhang, B.,et al. Realizing high thermoelectricity in polycrystalline tin sulfide via manipulating fermi surface anisotropy and phonon dispersion[J]. MATERIALS TODAY PHYSICS,2020,14:10.
APA	Wu, H..,Peng, K..,Zhang, B..,Gong, X. N..,Feng, Z. Z..,...&Zhou, X. Y..(2020).Realizing high thermoelectricity in polycrystalline tin sulfide via manipulating fermi surface anisotropy and phonon dispersion.MATERIALS TODAY PHYSICS,14,10.
MLA	Wu, H.,et al."Realizing high thermoelectricity in polycrystalline tin sulfide via manipulating fermi surface anisotropy and phonon dispersion".MATERIALS TODAY PHYSICS 14(2020):10.