In this article we have made a theoretical study of a vertical junction solar cell in parallel monochromatic illumination under static mode and under irradiation. The resolution of the continuity equation which governs the electron scattering process in the base help us to establish the expression of the density of electrons in the base and, from that, deduce by expressing the diffusion capacitance according to the wavelength λ, the recombination velocity at the junction Sf and the parameters of irradiation.We have studied the influence of wavelength variation on the diffusion capacitance , the short-circuit capacitance of diffusion, the open-circuit capacitance of diffusion and the diffusion capacitance efficiency.

In this article we have made a theoretical study of a parallel vertical junction solar cell under monochromatic illumination in static mode and under irradiation. The resolution of the continuity equation which governs the electron scattering process in the base helps us to establish the expression of the electron density and deduce expressions of photocurrent density and photovoltage depending on the wavelength λ, recombination velocity at the junction and irradiation parameters.Expressions series and shunt resistance according to the wavelength, the recombination velocity at the junction and irradiation parameters are obtained from the photovoltage and photocurrent density. We have studied the influence of irradiation variationon the electron density in the base, the photocurrent, photovoltage and the shunt and series resistances.

We present in this paper, the wavelength effect on the space charge '