Dependence of crystal semiconductor solar cell electromotive force on illuminance as a dynamic system

Abstract

This paper deals with the examination of polycrystal silicon solar cells of various areas in active parts. The impact of illuminance on changes of the solar cell electromotive force (EMF) is analyzed. A mathematical model for a solar cell electromotive force dependence on illuminance is presented. For this purpose, a selection of experimental data trend function was carried out, and the Pearson correlation coefficients were established. The most optimal results were obtained in case of an exponential function with the strongest correlation observed (R2 = 0.983). The analysis has shown that in case of 100W/m2 illuminance the EMF saturation is obtained (the EMF changes insignificantly and fluctuates at around 2 V), what in turn indicates that upon reaching such an illuminance, a solar cell has the greatest work efficiency. A first-order differential equation satisfied by the trend function has been compiled. The analysis revealed that when interpreting illuminance as a variable of time, an interpretation of the dynamic system of the proposed mathematical model can be presented.