In this paper, we prepared Titanium Dioxide (TiO2) based dye sensitized solar cells (DSSC). Downscaling of commercial TiO2 powder have been achieved by systematic ball milling carried out using home-made device. Thin films were and samples characterized XRD, SEM, UV-Vis I-V. The main objective work is to prepare (DSSC) N3 study the effect grain size inside photoanode layer on efficiency cell. U...