Title: EXAFS study of thermoelectric BiCuOSe: Effects of Cu vacancies
Authors: Chou, Ta-Lei
Tewari, Girish C.
Chan, Ting-Shan
Hsu, Ying-Ya
Yamauchi, Hisao
Karppinen, Maarit
Master and Ph.D. Program for Science and Technology of Accelrrator Light Source
Keywords: Semiconductors;EXAFS;Synchrotron radiation;X-ray spectroscopies
Issue Date: 1-Mar-2015
Abstract: 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.
URI: http://dx.doi.org/10.1016/j.ssc.2015.01.007
ISSN: 0038-1098
DOI: 10.1016/j.ssc.2015.01.007
Volume: 206
Begin Page: 12
End Page: 16
Appears in Collections:Articles