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Scattering from metal nanoparticles near their localized plasmon resonance;especially, the resonances of noble metals which are mostly in the visible orinfrared part of the electromagnetic spectrum; is a way of improving lightabsorption in thin-film solar cells. The surface plasmon resonance can beaffected by different factors such as the type, size, shape, and dielectricproperties of the surrounding medium. Here we investigate, using the FiniteDifference Time Domain (FDTD) method, how different shapes of aluminumnanoparticles affect absorption enhancement in silicon thin-film solar cells.Our results show that using these particles more than 30% conversion efficiencyfor plasmonic solar cells can be achieved compared to a cell without particles.We have also found that although the spherical particles have the highestabsorption peak, optimization of some parameters such as the height of thecylinder or disk-shaped particles and their distance from the substrate canincrease the absorption. The results can provide more information and insightto understand and optimize plasmonic particles for solar cell applications.

Effect of plasmonic Aluminum nanoparticles shapes on optical absorption enhancement in silicon thin-film solar cells