STUDY OF THE CAPACITY OF A POLYCRYSTALLINE SILICON SOLAR CELL UNDER MULTISPECTRAL ILLUMINATION IN THE FREQUENCY REGIME: EFFECT OF GRAIN SIZE AND FREQUENCY

In this work, the capacity of polycrystalline silicon solar cells when subjected to multispectral illumination in the frequency regime has been investigated using a numerical resolution method with the aim of making a contribution to this area of research. The focus is on the influence of silicon grain size and illumination frequency on capacitance, in other words on cell performance. Using a numerical resolution method, we have obtained results which show that grain size affects the optical and electrical response of cells when the recombination rate at the junction is less than 10 4 cm/s. The influence of frequency is also studied, showing that the capacitance is sensitive to the frequency of illumination when the recombination velocity is less than 10 2 cm/s. The study identified frequencies that enhance charge carrier generation. The results provide valuable insight into how to proceed to optimize solar cell efficiency based on polycrystalline silicon solar cell design, and pave the way for significant improvements in their performance under different illumination conditions. This article is a major contribution to the design of more efficient photovoltaic systems.