In the present study, a systematic investigations on the role of preparation conditions and/or experimental parameters namely dopant concentrations, pH, spin rate etc on the physical and electrical properties of spin coated ZnO thin films are made. They are optimized to achieve appreciable film properties for pure and doped ZnO thin films. The pure ZnO is considering as sample (A), dopant incorporated (magnesium (Mg))(pH 9.0, 10.0 and 11.0) are labelled as sample B, C and D respectively. The dopant cadmium (Cd) incorporated samples (pH 9.0, 10.0 and 11.0) are named as E, F and G respectively....