Fermi-surface dynamics and high thermoelectric performance along the out-of-plane direction in n-type SnSe crystals

doi:10.1039/c9ee03897c

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	Fermi-surface dynamics and high thermoelectric performance along the out-of-plane direction in n-type SnSe crystals
	Mao, Lisha ; Yin, Yinong ; Zhang, Qiang ; Liu, Guo-Qiang ; Wang, Hongxiang ; Guo, Zhe ; Hu, Haoyang ; Xiao, Yukun ; Tan, Xiaojian ; Jiang, Jun
刊名	ENERGY & ENVIRONMENTAL SCIENCE
	2020
卷号	13 期号:2 页码:616-621
关键词	POLYCRYSTALLINE SNSE THERMAL-CONDUCTIVITY POWER FIGURE MERIT PB
DOI	10.1039/c9ee03897c
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.
学科主题	Chemistry ; Energy & Fuels ; Engineering ; Environmental Sciences & Ecology
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20060]
专题	2020专题
作者单位	1.Jiang, J (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China. 2.Liu, GQ 3.Tan, XJ 4.Jiang, J (corresponding author), Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China.
推荐引用方式 GB/T 7714	Mao, Lisha,Yin, Yinong,Zhang, Qiang,et al. Fermi-surface dynamics and high thermoelectric performance along the out-of-plane direction in n-type SnSe crystals[J]. ENERGY & ENVIRONMENTAL SCIENCE,2020,13(2):616-621.
APA	Mao, Lisha.,Yin, Yinong.,Zhang, Qiang.,Liu, Guo-Qiang.,Wang, Hongxiang.,...&Jiang, Jun.(2020).Fermi-surface dynamics and high thermoelectric performance along the out-of-plane direction in n-type SnSe crystals.ENERGY & ENVIRONMENTAL SCIENCE,13(2),616-621.
MLA	Mao, Lisha,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):616-621.