Optimizing light absorption in CIGS solar cells using plasmonic nanoparticles: Variations in material, geometry, and placement

Syaibah, Abi (2024) Optimizing light absorption in CIGS solar cells using plasmonic nanoparticles: Variations in material, geometry, and placement. S1 thesis, Universitas Andalas.

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Abstract

This research aims to enhance light absorption in ultra-thin Copper Indium Gallium Selenide (CIGS) solar cells using plasmonic nanoparticles (Au, Al, Ag). The study investigates the effects of nanoparticle material, shape, size, spacing, and positioning within different layers of the solar cells. Computational Finite Difference Time-Domain (FDTD) simulations were employed. Results indicate that placing nanoparticles (NPs) on the front surface decreases the short-circuit current density (Jsc) as NP size increases, with the smallest decrease observed for triangular NPs and the largest for cubic NPs. Aluminum NPs resulted in the highest Jsc on the front surface. Conversely, positioning NPs within the active layers increases Jsc, with cylindrical NPs achieving a maximum Jsc of 30.92 mA/cm². Placing NPs on the back surface also improves Jsc, with the most significant enhancement seen in cubic and cylindrical shapes. Aluminum generally provided better performance than silver and gold, except in spherical form. Optimization showed that the optimal NP size is 60 nm and the optimal spacing is 25 nm. The best configuration for maximizing Jsc involved using silver cylindrical NPs with a size of 60 nm and spacing of 25 nm, placed within the active layers.

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