D. B. Alwan, F. H. . Ali, and W. A. Twej, “Improving the efficiency of dye-sensitized solar cells with doping and co- doping titanium dioxide”, Iraqi Journal of Science, vol. 57, no. 3C, pp. 2228–2233, Feb. 2022, Accessed: Jan. 03, 2026. [Online]. Available: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/6437