eng Science and Education Publishing American Journal of Energy Research 2328-7330 2022-12-25 10 1 22 28 10.12691/ajer-10-1-3 AJER20221013 article Jean Jude Domingo ehembaalain@yahoo.fr 1 Demba Diallo 1 Alain Kassine Ehemba 1 Moustapha Dieng 1 Laboratory of Semiconductors and Solar Energy, Physics Department, Faculty of Science and Technology, University Cheikh Anta Diop ¨C Dakar This article presents the effect of wavelength and angular frequency on the capacity of a CIGS- based solar cell subjected to monochromatic illumination in frequency modulation. From the expression of the density of the minority charge carriers, phototension and capacitance are studied. A gap of 1.34 eV corresponding to a gallium proportion of 0.28 is chosen. The results found show that the efficiency of the capacity decreases with the increase of the wavelength. http://pubs.sciepub.com/ajer/10/1/3/ajer-10-1-3.pdf capacity CIGS wavelength monofacial photopile dynamic frequency regime