Synergistically optimized electrical and thermal properties by introducing electron localization and phonon scattering centers in CuGaTe(2)with enhanced mechanical properties

doi:10.1039/d0tc00795a

HFCAS OpenIR

	Synergistically optimized electrical and thermal properties by introducing electron localization and phonon scattering centers in CuGaTe(2)with enhanced mechanical properties
	Huang, Lulu 1,2; Zhang, Jian1 ; Zhu, Chen 1,2; Ge, Zhenhua 3; Li, Yuanyue 4; Li, Di1 ; Qin, Xiaoying1
	2020-06-14
发表期刊	JOURNAL OF MATERIALS CHEMISTRY C
ISSN	2050-7526
通讯作者	Zhang, Jian(zhangjian@issp.ac.cn) ; Li, Di(lidi@issp.ac.cn) ; Qin, Xiaoying(xyqin@issp.ac.cn)
摘要	CuGaTe(2)based chalcopyrite materials have attracted intense research interest due to their high power factor. However, it is difficult to substantially improve the thermoelectric performance because of their high thermal conductivity. Here we simultaneously optimize their thermoelectric and mechanical properties by introducing carbon particles (CPs) into the CuGaTe(2)matrix. Firstly, as electron localization centers, the introduced carbon particles can enhance their electrical conductivity and thereby the power factor by adjusting the electrical transport properties. Secondly, the interfaces between carbon particles and the matrix can strongly scatter the heat carrying phonons and suppress their thermal conductivity, leading to similar to 41% decrease in lattice thermal conductivity at 873 K. The highestZTvalue (similar to 1.0@873 K) is obtained for CuGaTe2+ 0.5 wt.% CPs, which is similar to 28% larger than that of pure CuGaTe2. Thirdly, the softer carbon particles can simultaneously optimize the hardness and fracture toughness of the composites, which is beneficial for the techniques used in the processing of thermoelectric devices. The hardness is decreased from 4.45 to 3.82 GPa and the fracture toughness is increased from 0.80 to 1.10 MPa m(1/2)after introducing 0.5 wt.% CPs into the CuGaTe(2)matrix, respectively. All results indicate that the incorporation of carbon particles is a very promising approach for improving the thermoelectric and mechanical properties of CuGaTe2.
DOI	10.1039/d0tc00795a
关键词[WOS]	THERMOELECTRIC PROPERTIES ; PERFORMANCE ; CUGATE2 ; COMPOSITES ; NANOCOMPOSITES ; EFFICIENCY ; DISTORTION
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51972307] ; National Natural Science Foundation of China[51672278] ; National Natural Science Foundation of China[11674322]
项目资助者	National Natural Science Foundation of China
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:000542764300027
出版者	ROYAL SOC CHEMISTRY
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/71419
专题	中国科学院合肥物质科学研究院
通讯作者	Zhang, Jian; Li, Di; Qin, Xiaoying
作者单位	1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Kunming Univ Sci & Technol, Fac Mat Sci & Engn, Kunming 650093, Yunnan, Peoples R China 4.Qingdao Univ, Coll Microtechnol & Nanotechnol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Huang, Lulu,Zhang, Jian,Zhu, Chen,et al. Synergistically optimized electrical and thermal properties by introducing electron localization and phonon scattering centers in CuGaTe(2)with enhanced mechanical properties[J]. JOURNAL OF MATERIALS CHEMISTRY C,2020,8.
APA	Huang, Lulu.,Zhang, Jian.,Zhu, Chen.,Ge, Zhenhua.,Li, Yuanyue.,...&Qin, Xiaoying.(2020).Synergistically optimized electrical and thermal properties by introducing electron localization and phonon scattering centers in CuGaTe(2)with enhanced mechanical properties.JOURNAL OF MATERIALS CHEMISTRY C,8.
MLA	Huang, Lulu,et al."Synergistically optimized electrical and thermal properties by introducing electron localization and phonon scattering centers in CuGaTe(2)with enhanced mechanical properties".JOURNAL OF MATERIALS CHEMISTRY C 8(2020).