Lattice Dynamics and Thermal Conductivity in Cu2Zn1-xCoxSnSe4

doi:10.1021/acs.inorgchem.8b00569

	Lattice Dynamics and Thermal Conductivity in Cu2Zn1-xCoxSnSe4
	Liu, Y; Xu W(徐伟); Zhu YC(朱英才); Zhu, YC; Ren, GK; Tan, X; Yu, MJ; Lin, YH; Nan, CW; Marcelli, A
刊名	INORGANIC CHEMISTRY
	2018
卷号	57 期号:10 页码:6051-6056
ISSN号	0020-1669
DOI	10.1021/acs.inorgchem.8b00569
文献子类	Article
英文摘要	The quaternary compound Cu2ZnSnSe4 (CZTSe), as a typical candidate for both solar cells and thermoelectrics, is of great interest for energy harvesting applications. Materials with a high thermoelectric efficiency have a relatively low thermal conductivity, which is closely related to their chemical bonding and lattice dynamics. Therefore, it is essential to investigate the lattice dynamics of materials to further improve their thermoelectric efficiency. Here we report a lattice dynamic study in a cobalt-substituted CZTSe system using temperature-dependent X-ray absorption fine structure spectroscopy (TXAFS). The lattice contribution to the thermal conductivity is dominant, and its reduction is mainly ascribed to the increment of point defects after cobalt substitution. Furthermore, a lattice dynamic study shows that the Einstein temperature of atomic pairs is reduced after cobalt substitution, revealing that increasing local structure disorder and weakened bonding for each of the atomic pairs are achieved, which gives us a new perspective for understanding the behavior of lattice thermal conductivity.
电子版国际标准刊号	1520-510X
WOS关键词	PERFORMANCE BULK THERMOELECTRICS ; TRANSPORT-PROPERTIES ; SOLID-SOLUTIONS ; DOPED CA3CO4O9 ; CRYSTALS ; BANDS ; CONVERGENCE ; CU2ZNSNSE4 ; CHEMISTRY
WOS研究方向	Chemistry
语种	英语
WOS记录号	WOS:000433013600036
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285948]
专题	高能物理研究所_多学科研究中心高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Liu, Y,Xu W,Zhu YC,et al. Lattice Dynamics and Thermal Conductivity in Cu2Zn1-xCoxSnSe4[J]. INORGANIC CHEMISTRY,2018,57(10):6051-6056.
APA	Liu, Y.,徐伟.,朱英才.,Zhu, YC.,Ren, GK.,...&胡天斗.(2018).Lattice Dynamics and Thermal Conductivity in Cu2Zn1-xCoxSnSe4.INORGANIC CHEMISTRY,57(10),6051-6056.
MLA	Liu, Y,et al."Lattice Dynamics and Thermal Conductivity in Cu2Zn1-xCoxSnSe4".INORGANIC CHEMISTRY 57.10(2018):6051-6056.