Introducing PbSe quantum dots and manipulating lattice strain contributing to high thermoelectric performance in polycrystalline SnSe

doi:10.1016/j.mtphys.2021.100542

	Introducing PbSe quantum dots and manipulating lattice strain contributing to high thermoelectric performance in polycrystalline SnSe
	Li, Shuang 3; Lou, Xunuo 3; Zou, Bo 3; Hou, Yunxiang 3; Zhang, Jian 4; Li, Di 4; Fang, Jun 2; Feng, Tao 5; Zhang, Dewei 1; Liu, Yousong 6
刊名	MATERIALS TODAY PHYSICS
	2021-11-01
卷号	21
关键词	SnSe Quantum dot Lattice strain Thermoelectric property Magnetic field
ISSN号	2542-5293
DOI	10.1016/j.mtphys.2021.100542
通讯作者	Liu, Jizi(jzliu@njust.edu.cn) ; Tang, Guodong(tangguodong@njust.edu.cn)
英文摘要	Here, a p-type polycrystalline SnSe integrated with PbSe quantum dots is fabricated by an in situ magnetic field-assisted hydrothermal route. The decrease of the critical nucleation free energy and increase of homogeneous nucleation rate lead to the formation of PbSe quantum dots under high magnetic field. The enhanced density of states due to PbSe quantum dots causes significantly enhanced Seebeck coefficients and power factor. A large integral area of power factor over the full temperature range is optimized. The lattice strain induced by dislocations and stacking faults shortens the phonon relaxation time, leading to an ultralow lattice thermal conductivity (0.32 W m(-1) K-1 at 873 K perpendicular to the pressing direction). Consequently, these electronic and thermal effects contribute to a high ZT of similar to 1.9 at 873 K and an outstanding average ZT of 0.71 in polycrystalline SnSe. The combination of introducing PbSe quantum dots functional units and manipulating lattice strain provides a new perspective for designing high performance thermoelectric devices. (C) 2021 Published by Elsevier Ltd.
资助项目	National Natural Science Foundation of China[52071182] ; National Natural Science Foundation of China[U1732153] ; National Natural Science Foundation of China[11802276] ; Qinglan Project of the Young and Middle-aged Academic Leader of Jiangsu Province ; Fundamental Research Funds for the Central Universities[30921011107]
WOS关键词	ULTRAHIGH POWER-FACTOR ; HIGH MAGNETIC-FIELD ; THERMOPOWER ; FIGURE ; MERIT ; SOLIDIFICATION ; TRANSITION
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000708226400002
资助机构	National Natural Science Foundation of China ; Qinglan Project of the Young and Middle-aged Academic Leader of Jiangsu Province ; Fundamental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/125741]
专题	中国科学院合肥物质科学研究院
通讯作者	Liu, Jizi; Tang, Guodong
作者单位	1.Yancheng Inst Technol, Sch Mat Sci & Engn, Yancheng 221051, Peoples R China 2.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, Hefei 230031, Peoples R China 3.Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, MIIT Key Lab Adv Metall & Intermetall Mat Technol, Nanjing 210094, Peoples R China 4.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 5.Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 210094, Peoples R China 6.China Acad Engn Phys, Inst Chem Mat, Mianyang 621900, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Li, Shuang,Lou, Xunuo,Zou, Bo,et al. Introducing PbSe quantum dots and manipulating lattice strain contributing to high thermoelectric performance in polycrystalline SnSe[J]. MATERIALS TODAY PHYSICS,2021,21.
APA	Li, Shuang.,Lou, Xunuo.,Zou, Bo.,Hou, Yunxiang.,Zhang, Jian.,...&Tang, Guodong.(2021).Introducing PbSe quantum dots and manipulating lattice strain contributing to high thermoelectric performance in polycrystalline SnSe.MATERIALS TODAY PHYSICS,21.
MLA	Li, Shuang,et al."Introducing PbSe quantum dots and manipulating lattice strain contributing to high thermoelectric performance in polycrystalline SnSe".MATERIALS TODAY PHYSICS 21(2021).