Taib, Syafa Syahirah, et al. “TiO2 Based Dye-Sensitized Solar Cell Prepare by Using Spray Pyrolysis Deposition (SPD)”. International Journal of Integrated Engineering, vol. 10, no. 1, Apr. 2018, https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/2083.