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Lattice Dynamics and Thermal Conductivity in Cu2Zn1-xCoxSnSe4
Zhu YC(朱英才); Zhu, YC; Liu, Y; Ren, GK; Tan, X; Yu, MJ; Lin, YH; Nan, CW; Marcelli, A; Hu, TD; Xu, W; Yu MJ(于梅娟); Hu TD(胡天斗); Xu W(徐伟)
2018
Source PublicationINORGANIC CHEMISTRY
ISSN0020-1669
EISSN1520-510X
Volume57Issue:10Pages:6051-6056
SubtypeArticle
AbstractThe 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.
DOI10.1021/acs.inorgchem.8b00569
WOS KeywordPERFORMANCE BULK THERMOELECTRICS ; TRANSPORT-PROPERTIES ; SOLID-SOLUTIONS ; DOPED CA3CO4O9 ; CRYSTALS ; BANDS ; CONVERGENCE ; CU2ZNSNSE4 ; CHEMISTRY
Indexed BySCI
Language英语
WOS Research AreaChemistry
WOS SubjectChemistry, Inorganic & Nuclear
WOS IDWOS:000433013600036
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/285948
Collection多学科研究中心
粒子天体物理中心
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Zhu YC,Zhu, YC,Liu, Y,et al. Lattice Dynamics and Thermal Conductivity in Cu2Zn1-xCoxSnSe4[J]. INORGANIC CHEMISTRY,2018,57(10):6051-6056.
APA 朱英才.,Zhu, YC.,Liu, Y.,Ren, GK.,Tan, X.,...&徐伟.(2018).Lattice Dynamics and Thermal Conductivity in Cu2Zn1-xCoxSnSe4.INORGANIC CHEMISTRY,57(10),6051-6056.
MLA 朱英才,et al."Lattice Dynamics and Thermal Conductivity in Cu2Zn1-xCoxSnSe4".INORGANIC CHEMISTRY 57.10(2018):6051-6056.
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