Fabrication of doped metal oxide thin films and investigation of their some physical properties

The continuous development of today's technology allows more value-added products to be processed. This increases the need for alternative and economical semiconductor materials. Reducing the cost of semiconductor technology and making it easily accessible is possible with thin films. In this study, ZnO thin films were obtained by "Sol-Gel Magnetic Rotating Coating method which was used for the first time in the literature and developed as an alternative to production techniques made with complex and expensive technology. In this developed technique, the spinning process is performed magnetically, unlike other expensive techniques. ZnO thin films are used in many current technological fields and their electrical structure can be changed by adding various metals with specific surface properties. Doping of Al and Cd was done by increasing at the ratio of 1%, 3% and 5%. Some physical properties of doped and undoped ZnO thin films were examined using X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM) and UV-Vis. Spectrophotometer. XRD analysis showed that all thin films were polycrystalline and overlapped with hexagonal ZnO structure. When FESEM images were examined, it was seen that the film consisted of particles of nanoscale which were almost homogeneously distributed over the entire surface of the film. The band gap values obtained by UV-Vis. Spectroscopy measurements were calculated as approximately 3.3 eV. When the properties of doped ZnO thin films were examined, it was seen that the coating was distributed homogeneously on the surface, the particle size values increased as the doping amount increased and the cavities on the surface disappeared and thus formed of nanoscale particles which were held better to each other. In addition, it was observed that band gap values decreased with increasing amount of doped films. With this thin film production technique, which was used for the first time in the literature, thin films, with and without additives, could be produced more easily and economically.