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

文献类型：期刊论文

作者Li, Shuang2; Lou, Xunuo2; Zou, Bo2; Hou, Yunxiang2; Zhang, Jian3; Li, Di3; Fang, Jun4; Feng, Tao5; Zhang, Dewei6; Liu, Yousong1
刊名MATERIALS TODAY PHYSICS
出版日期2021-11-01
卷号21
关键词SnSe Quantum dot Lattice strain Thermoelectric property Magnetic field
ISSN号2542-5293
DOI10.1016/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.
WOS关键词ULTRAHIGH POWER-FACTOR ; HIGH MAGNETIC-FIELD ; THERMOPOWER ; FIGURE ; MERIT ; SOLIDIFICATION ; TRANSITION
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研究方向Materials Science ; Physics
语种英语
WOS记录号WOS:000708226400002
出版者ELSEVIER
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
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.China Acad Engn Phys, Inst Chem Mat, Mianyang 621900, Sichuan, Peoples R China
2.Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, MIIT Key Lab Adv Metall & Intermetall Mat Technol, Nanjing 210094, Peoples R China
3.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
4.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, Hefei 230031, Peoples R China
5.Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 210094, Peoples R China
6.Yancheng Inst Technol, Sch Mat Sci & Engn, Yancheng 221051, 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).

入库方式： OAI收割

来源：合肥物质科学研究院

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