Journal
SUPERLATTICES AND MICROSTRUCTURES
Volume 50, Issue 6, Pages 591-600Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.spmi.2011.08.009
Keywords
SnO2; Sb; Sol-gel; Impedance spectroscopy
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Funding
- Algerian Ministry of Higher Education and Scientific Research
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Antimony-doped tin oxide thin films have a range of technological applications as conductive coatings, and sot-gel processing seems to offer some advantages over other coating techniques. In this study antimony-doped tin oxide (ATO) thin films have been prepared by the sol-gel dip-coating (SGDC) process, using tin (II) chloride dehydrate (SnCl2, 2H(2)O) and antimony (III) chloride (SbCl3) as host and dopant precursors respectively. The structure of the (ATO) powders was analysed by X-ray diffraction (XRD) and the microstructure of the thin films by atomic force microscopy (AFM). These investigations show that the structure is tetragonal rutile type and that an increase in Sb-doping decreases the crystallite size of the (ATO) particles. To analyze the impedance spectroscopy data, the Nyquist (Z '' vs. Z') plots as well as the representation of imaginary (Z '') and real (Z') parts of impedance vs. frequency were used. The Nyquist plots suggest that only the grain boundaries are responsible in the conduction mechanism of the material. From the variation of In sigma vs. inverse of absolute T we have deduced the activation energy found to be 0.87 eV. (C) 2011 Elsevier Ltd. All rights reserved.
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