EXAFS study of thermoelectric BiCuOSe: Effects of Cu vacancies

doi:10.1016/j.ssc.2015.01.007

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 加速器光源科技與應用學位學程 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 http://hdl.handle.net/11536/124311
ISSN:	0038-1098
DOI:	10.1016/j.ssc.2015.01.007
Journal:	SOLID STATE COMMUNICATIONS
Volume:	206
Begin Page:	12
End Page:	16
Appears in Collections:	Articles