A method to determine the transient capacitance of the bifacial solar cell considering the cylindrica grain and the dynamic junction velocity (Sf)

Abstract

ansactions A method to determine the transient capacitance of the bifacial solar cell considering the cylindrica grain and the dynamic junction velocity (Sf) AbstractIn this paper, we present a new technic based on t transient diffusion capacitance of the bifacial solar cell back surface recombination velocity (Sb) and the grain boundary recombination velocity (Sgb), we resolved the continuity equation in the base of the solar cell under monochro diffusion capacitance profile which decreases with the dynamic junction velocity (Sf), the back surface recombination velocity (Sb), the grain boundary recombination velocity (Sgb) and the high wave transient diffusion capacitance increases with the grains size (R).Keywords: Grain Size, Grain Boundary Recombination Velocity, Polycrystalline, Solar Cell, Junction Recombination Velocity, Wavelength, Capacitance. IntroductionThe choice of a model constitutes the basis of any modeling study leading to simulations and therefore to the results which enable to the physicist to make his scientific reading. For the characterization of solar cells, the one dimension (1D) [1,2] In this paper, we present a new technic based on the dynamic junction velocity (Sf) concept for the evaluation of the transient diffusion capacitance of the bifacial solar cell considering cylindrical model of the grains. Associating (Sf), the back surface recombination velocity (Sb) and the grain boundary recombination velocity (Sgb), we resolved the continuity f the solar cell under monochromatic illumination. We calculated and plotted the solar cell's transient diffusion capacitance profile which decreases with the dynamic junction velocity (Sf), the back surface recombination velocity (Sb), the grain boundary recombination velocity (Sgb) and the high wavelength. The study shows also that the transient diffusion capacitance increases with the grains size (R). The choice of a model constitutes the basis of any modeling study leading to simulations and therefore to the results which enable to the physicist to make his scientific reading. For the characterization of solar cells, the one dimension he columnar grains [3-4-5] models are widely used. Hence, combined to the dynamic junction velocity (SF), some methods are proposed to determine the diffusion length and the lifetime of the excess minority carriers in the base of the solar cell [6]. These permit also to calculate the excess minority carriers density, the photocurrent I [5], the photot cell's power (P), the I-V and P intrinsic junction recombination velocity (Sf0) [1,2] [1,2], the series and shunt resistances [5] and the diffusion capacitance solar cell's efficiency. Considering these two dimensions, effects of magnetic and electric fields and the irradiation on the electrical solar cell parameters are also studied [7,8]. In [3], authors used the columnar grains model and concluded that the solar cell's junction could be considered as a plane capacitor with two identical plane electrodes separated by an extension region width which de the dynamic...