Preparation of Mn- doped ZnO Thin Film Using (Sol-gel) Method for Solar Cell Applications

Abstract

Two thin films of zinc oxide one of them is doped by 5% wt Mn were deposited by (SoL-GeL)method. Sol prepared from Zinc Acetate Dihydrate, Manganies Acetate Dihydrate and Dimethylformamide, Fluk (0.1%)as solvent. both thin films were deposition on glass substrate with dimension of (7.5*2.5*0.1)cm using dip coating method,The analysis of (XRD) for Zinc oxide film showed polycrystalline hexagonal wurtzite structure especially in reflection planes (100),(002),(101).Scherrer‘s formula used to calculate crystallite size .There is changed in crystal structure and grain size when the thin film doped with 5% wt Mn. The morphological characterictic of thin films investegatied by atomic force microscopy .The results showed that the rate of surface roughness (41.1 and 81.4) nm also the optical properties studied by determing the transmittance by UV-Visi spectroscopy .The energy gap increased to (3.3-3.7) ev, when doped with 5% wt Mn,which made the prepared thin films agreed with the standard measurement for the thin films used in optical and electronic device.