In this work, a theoretical study of luminescent solar concentrators (LSCs) based on stacked doped poly(methyl methacrylate) polymer optical fibres (POFs) has been carried out by means of Monte Carlo simulations. Two different dopants, namely the organic dyes lumogen red and lumogen yellow, uniformly distributed in the cross-sections of the fibres, have been employed in all simulations. Several layers of POFs doped with two dyes arranged in different possible orders in the stack of layers have been considered. Through a comparative analysis of the output irradiances from the different set-ups, this work does not only clarify how to improve the concentration factor, but also the underlying physical and geometrical reasons for the variations in the performance achieved from one of the tested arrangements to another.
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