Abstract
In this study, we, firstly, fabricated Fe 2 O 3 thin film recently promising to be used in spintronic technology by magnetron sputtering technique on ZnO thin film prepared by spray pyrolysis at 450 o C. The crystal structure, surface morphology and structure, chemical composition, optical and electronic properties, and electric properties of the Fe 2 O 3 /ZnO sample were performed by X-ray diffraction (XRD), scanning electron microscope (SEM) and atomic force microscope (AFM), energy-dispersive X-ray (EDX), ultraviolet-visible (UV-VIS) and Raman spectrometer, and Hall measurements, respectively. XRD measurements showed that Fe 2 O 3 and ZnO thin films have monoclinic and hexagonal crystal structures, respectively, and also both of them are polycrystalline. SEM images proved that there is a very good with the stoichiometric formation of ZnO nanocrystals of spherical shape and demonstrate aggregation of the particles and AFM images displays the distribution of flake-like of Fe 2 O 3 structure over the surface of ZnO. UV-VIS and Raman measurements revealed that the ZnO and Fe 2 O 3 /ZnO heterostructure band's band gap energy are 3.277 and 3.24 eV, respectively. Finally, the calculated values of electric conductivity, σ, electron density, n, and mobility of the electron, μ, using the data obtained from Hall measurements are 4.39x10 2 Ω -1 .m -1 , 6.88x10 21 m -3 and 3.99x10 -1 V -1 .m 2 . s, respectively.
Investigation of Optical, Structural and Electrical Properties of Heterostructure Fe2O3 Deposited by RF Magnetron Sputtering on ZnO Layer by Spray Pyrolysis
