Abstract

Increasing the light absorption in the weakly absorbing near-bandgap region is of great significance for improving efficiency in a thin-film silicon solar cell. In this study, light absorption enhancement near the infrared domain was realized by coating Ag nanoshells on the front side of amorphous silicon film. Detailed investigations prove that the enhancement can be related to the excitation of localized surface plasmons (LSPs). LSP scattering-induced light coupling in the guided mode, intense in-phase interference between the scattering field and the transmitted field, and the Floquet mode were observed in the simulated E-field profile, and the significant absorption enhancement was accounted for by these effects.

© 2013 Optical Society of America

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