External Magnetic Field Effect on Bifacial Silicon Solar Cell’s Electrical Parameters

Abstract

The aim of this work is to present a theoretical study of external magnetic field effect on a bifacial silicon solar cell's electrical parameters (peak power, fill factor and load resistance) using the J-V and P-V characteristics. After the resolution of the magneto transport equation and continuity equation of excess minority carriers in the base of the bifacial silicon solar cell under multispectral illumination, the photo-current density and the photovoltage are determined and the J-V and P-V curves are plotted. Using simultaneously the J-V and P-V curves, we determine, according to magnetic field intensity, the peak photocurrent density, the peak photovoltage, the peak electric power, the fill factor and the load resistance at the peak power point. The numerical data show that the solar cell's peak power decreases with magnetic field intensity while the fill factor and the load resistance increase.

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

“…The P-V characteristic curves of the photovoltaic module have also the same shape than those of a silicon solar cell [11]. From the various curves in Figure 3, it can be observed that firstly, at any specified intensity of the magnetic field, the electric power increases with the photovoltage, reaches a peak and then decreases with increasing photovoltage; secondly, at any given photovoltage, the electric power decreases as the intensity of the magnetic field increases; thirdly, as the intensity of the magnetic field increases, the curves shifts to the right, ).…”

“…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]. It can be noted that, for an increasing intensity of the magnetic field, the short-circuit current decreases considerably while the open circuit voltage increases slightly.…”

“…This results in an increase of the charge resistance at the maximum power point and that corresponds to a displacement of the photovoltaic module's operating point [11].…”

“…This situation corresponds to a displacement of the operating point of the photovoltaic module and subsequently an increase of the charge resistance at the maximum power point [11].…”

“…At last, the authors concluded that the I-V characteristics of the bifacial silicon solar cell decrease with the magnetic field. 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.…”