Structural and Optical Properties of Fe₂O₃-NiO Mixed Thin Films Prepared by Chemical Spray Pyrolysis

Abstract

Mixed Fe 2 O 3 -NiO thin films have been prepared by chemical Spray pyrolysis technique onto glass substrate preheated to 450 °C. The thickness of thin films was found to be (400 ±20) nm. XRD measurements reveal that all the film exhibit polycrystalline hexagonal wrutzite with a preferred orientation along (104) plane for pure and 10 % and 20 % Ni, while for the rest the structure was amorphous. AFM analysis indicate a nanostructure for all the films. The optical energy gap was found to be increased from optical transitions seems to be direct and the optical energy gap seems to be increased from 2.5 to 2.69 eV as the percentage of NiO increase.

Tuning of structural, optical band gap, and electrical properties of room-temperature-grown epitaxial thin films through the Fe2O3:NiO ratio

“…Therefore, the crystal structure and local structure of Fe-doped NiO and NiFe 2 O 4 thin films affect the magnetic, optical, and conductivity properties. Although many studies on the magnetic properties of Fe-doped NiO and NiFe 2 O 4 thin films have been performed; there is a lack of research on the optical properties, electrical conductivity, and crystal structure of Fe 2 O 3 :NiO mixture thin films 3,15,19–21 .…”