Sufer Ali, L., & Khalid Abdullah, A. (2012). Computer Simulation of The Effect of Band Cap Grading of The Cigs Absorber Layer on The Performance of Cds/Cigs Thin Film Solar Cell. Al-Rafidain Engineering Journal (AREJ), 20(3), 44–55. https://doi.org/10.33899/rengj.2012.50478