气候变化领域集成服务门户(CCPortal): Fermi-surface dynamics and high thermoelectric performance along the out-of-plane direction in n-type SnSe crystals

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DOI	10.1039/c9ee03897c
	Fermi-surface dynamics and high thermoelectric performance along the out-of-plane direction in n-type SnSe crystals
	Mao L.; Yin Y.; Zhang Q.; Liu G.-Q.; Wang H.; Guo Z.; Hu H.; Xiao Y.; Tan X.; Jiang J.
发表日期	2020
ISSN	17545692
起始页码	616
结束页码	621
卷号	13 期号:2
英文摘要	The layered chalcogenide SnSe has attracted great interest for its remarkable ZT records. Here, we report the excellent thermoelectric performance of n-type SnSe single crystals by alloying with PbBr2, where a maximum ZT of 2.1 at 770 K is achieved along the out-of-plane direction. Interestingly, we observed a sharp drop of the carrier mobility at PbBr2 content x = 3%, which terminates the continuous increase of ZT from x = 0.5% to x = 2%. It is shown that the anomalous decrease is due to the evolution of the Fermi surface driven by the enlargement of the out-of-plane axis. When 1% Sn is substituted by Ge, the restoration of the Fermi surface increases the ZT for the x = 3% sample by 200%. This study reveals the crucial role of the Fermi-surface dynamics in n-type SnSe, and the consequent strategy is confirmed to be highly efficient in the optimization of thermoelectric performance. © 2020 The Royal Society of Chemistry.
英文关键词	Fermi surface; Layered semiconductors; Lead alloys; Thermoelectricity; Tin compounds; Layered chalcogenides; Out-of plane; Out-of-plane direction; SnSe crystals; Surface dynamics; Thermoelectric performance; Tin alloys; efficiency measurement; electricity; inorganic compound; optimization; performance assessment; thermal power
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189711
作者单位	Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Mao L.,Yin Y.,Zhang Q.,et al. Fermi-surface dynamics and high thermoelectric performance along the out-of-plane direction in n-type SnSe crystals[J],2020,13(2).
APA	Mao L..,Yin Y..,Zhang Q..,Liu G.-Q..,Wang H..,...&Jiang J..(2020).Fermi-surface dynamics and high thermoelectric performance along the out-of-plane direction in n-type SnSe crystals.Energy & Environmental Science,13(2).
MLA	Mao L.,et al."Fermi-surface dynamics and high thermoelectric performance along the out-of-plane direction in n-type SnSe crystals".Energy & Environmental Science 13.2(2020).