CoO doping effects on the ZnO films through EBPDV technique
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2014
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Nanometric Zn1−xCoxO (x = 0.020, 0.025 and 0.030 in mol.%) nanopowders were obtained
from low temperature calcination of a resin prepared using the Pechini’s method. Firing the Zn1−xCoxO
resin at 400
◦
C/2 h a powder with hexagonal structure was obtained as measured by X-ray diffraction
(XRD). The powder presented average particle size of 40 nm observed by field emission scanning electronic
microscopy (FE-SEM) micrographs and average crystallite size of 10 nm calculated from the XRD using
Scherrer’s equation. Nanocrystalline Zn1−xCoxO films with good homogeneity and optical quality were
obtained with 280–980 nm thicknesses by electron beam physical vapour deposition (EBPVD) under
vacuum onto silica substrate at 25
◦
C. Scanning electron microscopy with field emission gun showed that
the film microstructure is composed by spherical grains and some needles. In these conditions of deposition
the films presented only hexagonal phase observed by XRD. The UV-visible-NIR and diffuse reflectance
properties of the films were measured and the electric properties were calculated using the reflectance and
transmittance spectra.
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BERNARDI, Maria Inês Basso; MAIA, Lauro June Queiroz; ANTONELLI, Eduardo; MESQUITA, Alexandre; SIU-LI, Máximo; GAMA, Lucianna. CoO doping effects on the ZnO films through EBPDV technique. The European Physical Journal Applied Physics, Les Ulis, v. 65, e30301, 2014.