Abstract
Light trapping is of importance in thin-film silicon solar cells for achieving a higher photocurrent. In this letter, we propose a unique cell structure incorporating submicron-sized light scatterers to enhance light trapping in the near-infrared (NIR) region. The effect of NIR light trapping is demonstrated in substrate-type hydrogenated amorphous/microcrystalline silicon tandem solar cells. By introducing the light scatterers at the interface between the top and bottom subcells, the NIR response of the solar cell is improved, where Mie scattering plays an essential role in increasing the optical path length of the NIR light.
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