Realization of high thermoelectric performance in solution-synthesized porous Zn and Ga codoped SnSe nanosheets

doi:10.1039/d2ta03079a

	Realization of high thermoelectric performance in solution-synthesized porous Zn and Ga codoped SnSe nanosheets
	Li, Shuang 1; Hou, Yunxiang 1; Li, Di 2; Zou, Bo 1; Zhang, Qingtang 1; Cao, Yang 3; Tang, Guodong 1
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2022-06-14
卷号	10
ISSN号	2050-7488
DOI	10.1039/d2ta03079a
通讯作者	Tang, Guodong(tangguodong@njust.edu.cn)
英文摘要	SnSe is considered one of the most intriguing new thermoelectric materials. Polycrystalline SnSe offers a wide range of thermoelectric applications due to its facile synthetic processing and machinability. Herein, we have achieved a high average ZT of 0.8 as well as a high peak ZT of 1.86 in solution-synthesized porous Zn and Ga codoped SnSe nanosheets, generating a maximum energy conversion efficiency of 13.3%. High-density micro/nanopores are induced in the SnSe matrix, which are more effective for scattering phonons and reducing the thermal conductivity. The high density of micro/nanopores, nanosheet structure and dislocations contribute to an ultralow lattice thermal conductivity (0.157 W m(-1) K-1 at 873 K). Meanwhile, Ga incorporation can induce band convergence and create resonance levels, producing a large Seebeck coefficient. Ga and Zn codoping contributes to a sharp increase in carrier concentration and an obviously increased electrical conductivity. The enhanced Seebeck coefficient and increased carrier concentration help in achieving a significant enhancement of the power factor over a wide temperature range in the porous Zn and Ga codoped SnSe nanosheets. Consequently, high thermoelectric performance is realized over a wide temperature range via the decoupling of electron-phonon transport in SnSe. This work opens up a great opportunity for designing prospective materials for thermoelectric applications with the aid of the solution synthesis route.
资助项目	National Natural Science Foundation of China[52071182] ; 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 ; POLYCRYSTALLINE SNSE ; THERMAL-CONDUCTIVITY ; CHALCOGENIDES ; FIGURE ; MERIT
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000802008500001
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/334002/131105]
专题	中国科学院合肥物质科学研究院
通讯作者	Tang, Guodong
作者单位	1.Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, MIIT Key Lab Adv Metall & Intermetall Mat Technol, Nanjing 210094, Peoples R China 2.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 3.Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 210094, Peoples R China
推荐引用方式 GB/T 7714	Li, Shuang,Hou, Yunxiang,Li, Di,et al. Realization of high thermoelectric performance in solution-synthesized porous Zn and Ga codoped SnSe nanosheets[J]. JOURNAL OF MATERIALS CHEMISTRY A,2022,10.
APA	Li, Shuang.,Hou, Yunxiang.,Li, Di.,Zou, Bo.,Zhang, Qingtang.,...&Tang, Guodong.(2022).Realization of high thermoelectric performance in solution-synthesized porous Zn and Ga codoped SnSe nanosheets.JOURNAL OF MATERIALS CHEMISTRY A,10.
MLA	Li, Shuang,et al."Realization of high thermoelectric performance in solution-synthesized porous Zn and Ga codoped SnSe nanosheets".JOURNAL OF MATERIALS CHEMISTRY A 10(2022).