中国科学院重庆绿色智能技术研究院机构知识库

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	Sodium-Doped Tin Sulfide Single Crystal: A Nontoxic Earth-Abundant Material with High Thermoelectric Performance
	Wu, Hong1,2,3; Lu, Xu1; Wang, Guoyu2,3; Peng, Kunling1; Chi, Hang4; Zhang, Bin5; Chen, Yongjin6; Li, Chengjun1; Yan, Yanci1; Guo, Lijie1
	2018
摘要	Lead-free tin sulfide (SnS), with an analogous structure to SnSe, has attracted increasing attention because of its theoretically predicted high thermoelectric performance. In practice, however, polycrystalline SnS performs rather poorly as a result of its low power factor. In this work, bulk sodium (Na)-doped SnS single crystals are synthesized using a modified Bridgman method and a detailed transport evaluation is conducted. The highest zT value of ≈1.1 is reached at 870 K in a 2 at% Na-doped SnS single crystal along the b-axis direction, in which high power factors (2.0 mW m−1 K−2 at room temperature) are realized. These high power factors are attributed to the high mobility associated with the single crystalline nature of the samples as well as to the enhanced carrier concentration achieved through Na doping. An effective single parabolic band model coupled with first-principles calculations is used to provide theoretical insight into the electronic transport properties. This work demonstrates that SnS-based single crystals composed of earth-abundant, low-cost, and nontoxic chemical elements can exhibit high thermoelectric performance and thus hold potential for application in the area of waste heat recovery. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
DOI	10.1002/aenm.201800087
发表期刊	Advanced Energy Materials
ISSN	16146832
卷号	8期号:20
收录类别	SCI
语种	英语
EISSN	16146840