eng Science and Education Publishing American Journal of Materials Science and Engineering 2333-4673 2018-04-28 6 1 12 17 10.12691/ajmse-6-1-3 AJMSE2018613 article Salif CISSE slfcisse@gmail.com 1 Alain EHEMBA 1 Ousmane DIAGNE 1 Mouhamadou Mamour SOCE 1 Moustapha DIENG 1 Department Physics, University Cheikh Anta DIOP, Dakar, Senegal The objective of this study is to present and explain theoretically the influence of irradiation energy on the diffusion capacity of a bifacial CuInGaSe2 solar cell under monochromatic illumination in dynamic frequency regime. Using the equation of continuity of the minority charge carriers in the base, the density of these carriers is determined. Then the expressions of the phototension are deduced. From these quantities the expressions of the capacitance are calculated and the representations of the curve of these parameters as well as the representation of the BODE diagram are interpreted. The obtained values are proposed with the effect of the irradiation energy. http://pubs.sciepub.com/ajmse/6/1/3/ajmse-6-1-3.pdf capacitance dynamic frequency regime bifacial photopile monochromatic illumination irradiation