Grain size optimization for high-performance polycrystalline SnSe thermoelectrics

doi:10.1039/c7ta03390g

CORC > 重庆绿色智能技术研究院 > 中国科学院重庆绿色智能技术研究院 > 机器人与3D打印技术创新中心

	Grain size optimization for high-performance polycrystalline SnSe thermoelectrics
	Peng, Kunling 1,2; Wu, Hong 1,2; Yan, Yanci 1,2; Guo, Lijie 1; Wang, Guoyu2,3 ; Lu, Xu 1; Zhou, Xiaoyuan 1
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2017-07-21
卷号	5 期号:27 页码:14053-14060
ISSN号	2050-7488
DOI	10.1039/c7ta03390g
通讯作者	Lu, X ; Zhou, XY (reprint author), Chongqing Univ, Coll Phys, Chongqing 401331, Peoples R China. ; Wang, GY (reprint author), Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China. ; Wang, GY (reprint author), Univ Chinese Acad Sci, Beijing 100004, Peoples R China.
英文摘要	To identify the origin of the performance discrepancy between the single crystal and polycrystalline SnSe, here we report the first attempt to investigate the thermoelectric properties of polycrystalline Sn0.97Na0.03Se directly made from Sn0.97Na0.03Se single crystals. It is found that the oxidization during the powder processing or after SPS greatly decreases the carrier concentration, and the increased oxidized/amorphous grain boundaries reduce the carrier mobility, leading to an order of magnitude reduction in the electrical conductivity compared to that of the single crystals. For the SnSe polycrystals synthesized in this study, a relatively high electrical conductivity for the ball milled sample with an average grain size around 4 mm is well preserved in the whole measured temperature range because of the favorable grain size as well as the grain-boundary potential, yielding a high average zT value of 0.44 perpendicular to the pressing direction.
资助项目	National Natural Science Foundation of China[11674040] ; National Natural Science Foundation of China[11404044] ; National Natural Science Foundation of China[11604032] ; National Natural Science Foundation of China[51472036] ; National Natural Science Foundation of China[51672270] ; Fundamental Research Funds for the Central Universities[106112016CDJZR308808] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH016] ; Project for Fundamental and Frontier Research in Chongqing[CSTC2015JCYJBX0026]
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000405190000017
内容类型	期刊论文
源URL	[http://172.16.51.4:88/handle/2HOD01W0/187]
专题	机器人与3D打印技术创新中心
通讯作者	Wang, Guoyu; Lu, Xu; Zhou, Xiaoyuan
作者单位	1.Chongqing Univ, Coll Phys, Chongqing 401331, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100004, Peoples R China
推荐引用方式 GB/T 7714	Peng, Kunling,Wu, Hong,Yan, Yanci,et al. Grain size optimization for high-performance polycrystalline SnSe thermoelectrics[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017,5(27):14053-14060.
APA	Peng, Kunling.,Wu, Hong.,Yan, Yanci.,Guo, Lijie.,Wang, Guoyu.,...&Zhou, Xiaoyuan.(2017).Grain size optimization for high-performance polycrystalline SnSe thermoelectrics.JOURNAL OF MATERIALS CHEMISTRY A,5(27),14053-14060.
MLA	Peng, Kunling,et al."Grain size optimization for high-performance polycrystalline SnSe thermoelectrics".JOURNAL OF MATERIALS CHEMISTRY A 5.27(2017):14053-14060.