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Effects of Gaussian Beam Radius on the Conversion Efficiency and the Diffusion Capacitance of a Polycrystalline Silicon Solar Cell

This study presents effects of Gaussian beam radius on the power and the conversion efficiency () of a polycrystalline silicon solar cell. The two-dimensional continuity equation solved using finite element method, permits to determine the excess minority carriers density, the photocurrent density and the photo voltage from which the power and the conversion efficiency of the solar cell are calculated. The capacitance (C) and the space charge region (SCR) width are also examined for various values of the radius of gaussian luminous flow. The gaussian luminous flow effects on solar cell’s performances are highlighted in comparing with those of a classical monochromatic illumination.