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Abstract

Ca0.07Ni0.93Cr2O4 was synthesized using solid-state method at 1000°C for 6h. Structural properties were studied by using X-ray diffraction and compared with Nickel Chromite compound (NiCr2O4) which was prepared at the same temperature. XRD patterns showed that Nickel Chromite compound crystallized according to the cubic pattern of the spinel structure. The value of its crystal lattice constant is a = 8.2449Å . After doping the Nickel Chromite with Calcium, the compound remained maintaining its crystalline structure without any change in the crystal structure, the value of the crystal lattice constant was a = 8.2695Å , that is slightly larger than its in Nickel Chromite, which was accompanied by an increase in the crystal cell and crystallization size due to the slight increase in the ionomer radii of the two elements. The experimental results were confirmed by using FTIR spectrums, which supported the formation of mixed oxide, and consistent with the results of XRD and SEM. Finally, the effect of this doping on the optical properties was studied, which showed that the value of the energy gap in the Calcium-doped Nickel Chromite compound increases slightly compared to the pure Nickel Chromite compound indicates that the prepared Ca0.07Ni0.93Cr2O4 compound may be a promising compound as a semiconductor, which makes it preferred in many optics and electronics.

Keywords

Band gap, Optical properties, Solar cells, Spinel structure, Structural properties

Subject Area

Chemistry

Article Type

Article

First Page

2230

Last Page

2238

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

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