EFFECT OF THE MAGNETIC FIELD ON THE SPECTRAL RESPONSE AND EXTERNAL QUANTUM EFFICIENCY OF A BIFACIAL SILICON SOLAR CELL

In this paper, a theoretical study of a constant magnetic field effect on spectral response and external quantum efficiency of a bifacial silicon solar cell, is done. Considering a steady-state regime, we use the continuity equation that is related to the photogenerated minority carriers in the base of a solar cell in order to determine the expression of the minority carriers density according to the wavelength, the magnetic field and the junction recombination velocity. Based on the expression of minority carriers density, we established the expressions of the photoconductivity and the photocurrent density from which the spectral response and the external quantum efficiency have been deduced according to the excitation and phenomenological parameters of the solar cell. We found that, as the magnetic field increases, both the spectral response and external quantum efficiency decrease what shows a degradation of the intrinsic properties of the solar cell.