External magnetic field effect on bifacial silicon solar cell''s electric power and conversion efficiency

Abstract

This article presents a modelling study of external magnetic field effect on a bifacial silicon solar cell's electric power and conversion efficiency. After the resolution of the magnetotransport equation and continuity equation of excess minority carriers, we calculate the photocurrent density and the photovoltage and then we deduce the solar cell's electric power before discussing the influence of the magnetic field on those electrical parameters. Using the electric power curves versus junction dynamic velocity we determine the maximum electric power, the operating point of the solar cell, and the conversion efficiency according to magnetic field intensity. The numerical data show that the solar cell's maximum electric power and conversion efficiency decrease with magnetic field intensity.

Modelling Study of Magnetic Field Effect on the Performance of a Silicon Photovoltaic Module

“…This is expressed by Equation (2). It appears in the expressions of I and V that they depend on junction dynamic velocity, Sf [10]. The variations of this parameter (junction dynamic velocity) lead to the values of I and V. I-V curves of the photovoltaic module have the same shape than those of a silicon solar cell [11].…”

“…The increase of the series and shunt resistances and the decrease of the current provided by the photovoltaic module to the external load show that the photovoltaic module has a resistive behavior under magnetic field as a solar cell [10]. This resistive behavior under the magnetic field is the magnetoresistance.…”

“…To investigate the effect of the external magnetic field on the electrical parameters of the PV module, we applied a variable external magnetic field, parallel to the surface of the n-p junction of the 36 mono-facial cells, as shown for a silicon solar cell in previous works [10] [11].…”

“…Zerbo et al [10] [11] showed that the maximum electric power and the conversion efficiency of a bifacial solar cell decrease with the increase of magnetic field while the fill factor and the load resistance at the maximum power point increase. In a similar vein, Zoungrana et al [12] studied a silicon solar cell under an intense light concentration and obtain the same results as Zerbo et al [10] the open circuit voltage, the maximum electric power, the fill factor, the conversion efficiency and the charge resistance at the maximum power point using simultaneously the I-V and P-V characteristics. Then, the series and shunt resistances of the photovoltaic module are calculated using equations developed by some researchers and the electrical parameters mentioned previously.…”

Effect of Incidence Angle Varying from 0 rad to π/2 rad and Intensity of Radio Waves on the Performance of a Silicon Solar Cell

“…Sf is the junction dynamic velocity and it quantifies the flow of excess carriers through the junction [12]. Therefore Sf defines [12].…”