Background: Plasmonic light trapping in thin-film crystalline silicon solar cells is
numerically investigated using finite-difference time-domain simulations.
Method: Enhancement of optical absorption due to the excitation of localized surface plasmons
in a periodic arrangement of aluminum nanostructures is analyzed.
Result: Broadband photocurrent enhancement in a 1 µm thick silicon film can be observed
over the 500-800 nm spectral range of interest.
Conclusion: Photocurrent density under Air Mass 1.5 global solar irradiation has been found
to be enhanced by up to 40% using aluminum nanostructures with 300 nm width and 100 nm
thick. The present work offers a cost-effective plasmonic material for solar cell applications.
Keywords: Thin-film solar cells, Light trapping, Surface plasmon, Optical absorption, Photocurrent density,
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