Nickel Doping and Annealing Effects on the Structural and Optical Properties of Iron Oxide Thin Films | ||
| Iraqi Journal of Applied Physics | ||
| Article 1, Volume 10, Issue 3, September 2014, Pages 17-22 | ||
| Author | ||
| Nidhal N. Jandow | ||
| Abstract | ||
| In this paper, we studied the effect of Ni doped Iron Oxide (Fe2O3: Ni) with two different concentrations (0.8:0.2) and (0.9:0.1) thin films prepared by chemical spray pyrolysis method on glass substrates and also the annealing effect on the structural and optical properties of the deposited films. The crystal quality and surface morphology of the films were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX), while the optical properties were studied calculated from transmission and absorption spectra. XRD results showed that -Fe2O3 (Hematite) is the most abundant phase with strong peak [110] shown at 2=33.15o-33.17o with full width at half maximum (FWHM) of (0.446-0.27) degree for the three samples before annealing; and 2= 33.155o-33.175o with a FWHM of (0.37-0.23) degree after annealing at temperature 300oC. The band gap of the samples obtained from transmittance spectra was found to vary from 2.14 to 2.43 eV for pure Fe2O3 and Fe2O3: Ni with two different concentrations thin films before annealing; and from 2.33 eV to 2.64 eV after annealing. The results revealed that the structural and optical properties of the samples improved by increasing the Ni concentration and also after annealing. | ||
| Keywords | ||
| Chemical spray pyrolysis; XRD; Optical properties | ||
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