A theoretical study of electronic characteristics based on charge transfer using quantum model N719 dye-sensitized contact with TiO2 in solar cells. The current density expression used to calculate the photovoltaic characteristics is assumed to be a continuum level of the N719 dye and TiO2 semiconductor in the heterojunction N719-TiO2 devices using the MATLAB program. The transition energy, current, fill factor, and efficiency of N719-TiO2 DSSCs are calculated based on quantum transition theory. The performance of DSSCs photovoltaic was estimated based on the I-V characteristics of the N719-TiO2 device using concentrations  at (100 mW/cm²) irradiation. The N719-TiO2 device with Butanol solvent at concentration  shows 0.8299 V, and (37.3034 mA/cm²) of open-circuit voltage and short-circuit current respectively fill factor of 0.206 compared to the open circuit of 0.8398 V and (87.5728 mA/cm²) and short-circuit current with fill factor of 0.257 at concentration of carrier . Current density and fill factor at limited transition energy increase with increasing the coupling constant and concentration of   N719 - TiO2 hetero junction and vice versa