An n/p/p+ silicon solar cell under monochromatic illumination with short wavelength is studied in steady state. Photogenerated minority carrier’s density in the base is obtained by solving the diffusion equation with boundary conditions at the surfaces of both the junction and the back. The photocurrent density is calculated and represented as function of junction surface recombination velocity for different absorption coefficient values in the short wavelength range. Then at short-circuit current condition given for large junction recombination values, the back-surface recombination expression is derived as silicon absorption coefficient dependent. As a result, compared with the intrinsic recombination velocity, optimum thickness is extracted for given absorption coefficient corresponding to short wavelength illumination and modeled in mathematic relationship.
New expressions of back surface recombination of excess minority carriers in the base of silicon solar are expressed dependent of both, the thickness and the diffusion coefficient which is in relationship with the doping rate.
The study of heat transfer under dynamic transient conditions established the tow-plaster material thermal resistance. We present a one-dimensional heat transfer study using a Tow-plaster material. We show the thermal resistance evolution of in the material subjected to climatic solicitation in transient dynamic regime. This is a one-dimensional, fully analytical modeling. This model allows us, on the one hand, to express the thermal resistance in the form of a sum of three resistances and thus to show the tow-plaster material relative thermal resistance. This study is highlighting in relation to the thermal behavior of the material by showing the influence of the coefficients of exchange.
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