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

文献类型：期刊论文

作者Huang, Lulu1,2; Zhang, Jian1; Zhu, Chen1,2; Ge, Zhenhua3; Li, Yuanyue4; Li, Di1; Qin, Xiaoying1
刊名JOURNAL OF MATERIALS CHEMISTRY C
出版日期2020-06-14
卷号8
ISSN号2050-7526
DOI10.1039/d0tc00795a
通讯作者Zhang, Jian(zhangjian@issp.ac.cn) ; Li, Di(lidi@issp.ac.cn) ; Qin, Xiaoying(xyqin@issp.ac.cn)
英文摘要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.
WOS关键词THERMOELECTRIC PROPERTIES ; PERFORMANCE ; CUGATE2 ; COMPOSITES ; NANOCOMPOSITES ; EFFICIENCY ; DISTORTION
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]
WOS研究方向Materials Science ; Physics
语种英语
WOS记录号WOS:000542764300027
出版者ROYAL SOC CHEMISTRY
资助机构National Natural Science Foundation of China
源URL[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).

入库方式： OAI收割

来源：合肥物质科学研究院

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