Study of the Diffusion Capacity of a CIGS-based Solar Cell in Dynamic Frequency Regime Under Monochromatic Illumination: Effect of Incidence Angle and Gallium Doping Rate

Abstract

In this paper a study in dynamic frequency regime under monochromatic illumination was made on a CIGS-based solar cell model. After solving the continuity equation of the minority carriers, equation governing the diffusion capacitance of the solar cell are extracted. The study shows that increasing the wavelength in the visible increases the module of capacitance at a gallium doping rate X=0.3. On the other hand, the angle of incidence and the gallium doping rate decrease the module of diffusion capacitance. The study of the Bode diagram illustrated by the variation of the module of the capacitance and phase of the latter as a function of the logarithm of the pulsation shows the existence of two characteristic zones of the pulsation whose limit characterizes the dynamic regime The study shows that the pulsation limiting the static regime to the dynamic regime increases with the increase of the gallium doping rate.