R. A. . Dheyab, A. A. . Hussein, and A. A. . Saeed, “Performance Enhancement of P3HT: ZnO Solar Cells by Incorporating Metal Oxide Fe2O3 Nanoparticles”, Iraqi Journal of Science, vol. 62, no. 11, pp. 4342–4352, Dec. 2021, doi: 10.24996/ijs.2021.62.11(SI).15.