The use of flexible organic light-emitting diodes (OLEDs) in smartphones and televisions with inclined screen shows significant improvements in commercial applications. Recently, flexible OLEDs have been used in lightweight, portable, wearable and even deformable screens, sensors as well as solid-state lighting applications. Under favour of these applications, remarkable developments are observed in the production of flexible electronics. The advantages of OLEDs according to the existing liquid crystal display (LCD) technology are self-emission capability, wide viewing angle, fast response time, simple structure, and low driving voltage. Highly conductive and transparent anodes are required for efficiency and uniform light emission in OLEDs. Indium tin oxide (ITO) which is one of the most promising anodes among transparent conductive oxides (TCO), has superior electrical and optical properties such as 􀌱85% high transmittance at the visible region and 􀌱104 Ω−1 cm−1good conductivity. The reason is due to the bandgap range of about 3.70 eV. Zinc tin oxide (ZnSnO or ZTO) is another TCO commonly used for many applications in the literature. Alternative anodes eliminate the use of ITO due to the absence of indium element so that highly desirable. In this thesis, ZTO is used as anode instead of ITO thin film and the eligibility of ZTO as an anode in OLED production is explored. The advantages of the optimized ZTO thin film according to the ITO are that is abundant on earth, has better performance, has low surface resistance, has less surface roughness, is capable of being produced as an anode in OLEDs. In this thesis to be successful, at the first stage ZTO thin films have grown on soda lime glass by magnetron sputtering, then ZTO and ZTO/Ag/ZTO multilayer thin films respectively have been deposited on flexible Polyethylene terephthalate (PET) and Polyimide (PI) substrates by magnetron sputtering method. In this way, the best coated thin films have been investigated using spectrophotometry, energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), Xray diffraction (XRD) and Raman spectroscopy.