A bifacial silicon solar cell under monochromatic illumination in frequency modulation by the rear side is being studied for the optimization of base thickness. The density of photogenerated carriers in the base is obtained by resolution of the continuity equation, with the help of boundary conditions at the junction surface (n + /p) and the rear face (p/p + ) of the base. For a short wavelength corresponding to a high absorption coefficient, the AC photocurrent density is calculated and represented according to the excess minority carrier's recombination velocity at the junction, for different modulation frequency values. The expression of the AC recombination velocity of excess minority carriers at the rear surface of the base of the solar cell is then deduced, depending on both, the absorption coefficient of the silicon material and the thickness of the base. Compared to the intrinsic AC recombination velocity, the optimal thickness is extracted and modeled in a mathematical relationship, as a decreasing function of the modulated frequency of back illumination. Thus under these operating conditions, a maximum short-circuit photocurrent is obtained and a low-cost bifacial solar cell can be achieved by reducing material (Si) to elaborate the base thickness.
Lequation de magneto transport relative aux porteurs minoritaires de charge dans la base de la photopile au silicium a jonctions verticales series, est resolue, munie des conditions aux limites, definies par les vitesses de recombinaison a la jonction et en face arriere. Le photocourant et la phototension sont determines, et representes par la caracteristique courant-tension (Iph(Sf)-Vph(Sf)) de la photopile sous eclairement monochromatique. Le modele electrique equivalent de la photopile en situation de circuit ouvert, conduit a la determination de la resistance serie, pour differentes epaisseurs optimum de la base, imposees par le champ magnetique applique.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.