“…As can be seen, I-V characteristics of cells deteriorated with increasing gamma irradiation. From figure 6, fundamental parameters of solar cells such as open circuit voltage (V oc ), short circuit current (I sc ), fill factor (ff) and efficiency (η) could be extracted (Ali, Gouveas, Hasan, Zaidi, & Asghar, 2011;Nikolić, Stanković, Timotijević, Rajović, & Vujisić, 2013;Vasic, Osmokrovic, Marjanovic, & Pejović, 2013). Vol.…”