This project, which took place between April 2014 and December 2014, mainly deals with the characterization of the synthesis, structural, electrical and optical properties of Ba1-xSrxTiO3 powders and their chemical solutions. Structural analyses of the powders synthesized from acetate precursors were carried out in both pure and doped form and the production of thin films was carried out with the experience gained from the synthesis of these powders. The Curie points of the powders were determined by thermal analysis and it was revealed that the Curie temperature decreased with increasing Sr element doping, that is, the ferroelectric composition could be controlled as desired. When the Sr ion diameter is lower than the Ba ion, the volume of the unit cell is reduced and the lattice structure is shifted toward the cubic structure, causing the Curie point to shift to lower temperatures. Almost all of the pure BaTiO3 and Sr-doped Ba1xSrxTiO3 compositions were found to be in the ferroelectric state on SrTiO3 substrates, which is due to compressive strains on this substrate. Ba1-xSrxTiO3 thin films were grown on SrTiO3, MgO and Nb-doped SrTiO3 single crystal substrates. Pt / Si substrates were also used. The reason for the selection of SrTiO3 and MgO substrates is that both substraties generate stresses on the Ba1-xSrxTiO3 lattice, respectively, by either compression or tension. Polycrystal formation were observed in the films grown on Pt / Si and MgO substrates, and thus the SrTiO3 and Nb-doped SrTiO3 (Nb: SrTiO3) films became the main focus of our work. In particular, films grown on Nb doped SrTiO3 substrates were used for electrical characterization. In electrical measurements, high leakage currents have been detected and the focus of the work has shifted towards illuminating its mechanisms. Especially the leakage current which is expected to increase due to polarization is investigated as a function of Sr composition and a significant decrease is detected with Sr addition. The reason for this behavior has been examined in detail. Furthermore, it has been found that the structure of Nb-SrTiO3 / Ba1-xSrxTiO3 / Pt behaves as a diode, and the asymmetry in the current-voltage curves depends on the polarization direction and magnitude. The electrical properties of this structure have been studied in detail and which interfaces are Schottky type and / or Ohmic have been determined. "Resistive polarization switching", a phenomena getting attention recently has been observed and studied in detail in the samples.