EXAFS study of thermoelectric BiCuOSe: Effects of Cu vacancies

被引：13
作者：
Chou, Ta-Lei [1 ]
Tewari, Girish C. [1 ]
Chan, Ting-Shan [2 ]
Hsu, Ying-Ya [3 ]
Yamauchi, Hisao [1 ]
Karppinen, Maarit [1 ]
机构：
[1] Aalto Univ, Dept Chem, FI-00076 Aalto, Finland
[2] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan
[3] Natl Chiao Tung Univ, Program Sci & Technol Accelerator Light Source, Hsinchu 300, Taiwan
来源：
SOLID STATE COMMUNICATIONS | 2015年 / 206卷
关键词：
Semiconductors; EXAFS; Synchrotron radiation; X-ray spectroscopies; OXYSELENIDES; PERFORMANCE; DYNAMICS; TE;
D O I：
10.1016/j.ssc.2015.01.007
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Excellent thermoelectric performance has been reported for the ZrCuSiAs-type BiCuOSe derivatives; for these materials the transport properties can be effectively adjusted by chemical substitutions or by introducing Cu vacancies. In this work we compare stoichiometric BiCuSeO and its Cu-deficient derivative BiCu0.95SeO by utilizing temperature dependent extended X-ray absorption fine structure (EXAFS) measurements. Such a local probe evidences that Cu vacancies make the lattice more ductile and susceptible to temperature variation. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：12 / 16
页数：5
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