Authors
1 University of Technology - Iraq
2 College of science, Physics department, university of Baghdad, Baghdad, Iraq.
3 Laser and Optoelectronics Eng. Department, University of Technology, Baghdad, Iraq.
Abstract
Indium Oxide (In2O3) and Zinc Oxide (ZnO) nanoparticles were
mixed carefully with gold nanoparticles, which were synthesis, by turkevich
method. By using the method of spray pyrolysis different concentrations
(5:5:0 ml, 5:4:1 ml, 5:3:2 ml, 5:2:3 ml, 5:1:4 ml and 5:0:5 ml) from these
chemical compounds were used to preformed nanocomposite thin films of
thickness of (250-300) nm. The structural properties were studied for all
nanocomposite thin film samples with different concentrations. The existence
of Miller indices conforms to (211), (222), (400), (333), (440) and (622) major
lattice planes of the cubic spinel phase of In2O3 at 2θ =20.17, 33, 44.66, 50.95,
59.02, 72.48 and 73.12. While secondary lattice planes of (100) and (002) of
ZnO at 2θ = 31.5582 and 34.1617, also lattice planes of (111) and (200) of
Au were found at 2θ = 38.5799 and 45.6016. The work also extended to study
the optical properties, which included the transmission spectrum, absorption
spectrum, absorption coefficient, attenuation coefficient and estimation of
optical energy gap for all samples. The results of optical properties were
clearly demonstrated that the increasing of gold concentration is decreasing
the transmission, and decreasing the optical band gap from 3.10 to 3.05 eV,
but increasing the absorption coefficient and attenuation coefficient. Finally
The real and imaginary part of dielectric constant of (In2O3:ZnO:Au)
nanocomposite thin film with different concentrations decrease with
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