Light trapping designs for thin silicon solar cells based on photonic crystal and metallic diffractive grating structures

James G Mutitu,Shouyuan Shi,Allen M Barnett,Christiana B Honsberg,Dennis W Prather

Photovoltaic Specialists Conference（2009）

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摘要

We present novel light trapping designs applied to thin (5 micron) silicon solar cells. The design structures incorporate diffractive gratings to increase the optical path length of light within the solar cells. We incorporate a combination of dielectric and metallic materials to create the gratings. We form a one dimensional photonic crystal stack with the dielectric materials to which we then add the metallic layers. The combination of the two materials enhances the reflective properties of the gratings and thus increasing their effectiveness in light trapping. We use the particle swarm optimization and scattering matrix methods to realize the design structures.

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关键词

s-matrix theory,dielectric materials,diffraction gratings,elemental semiconductors,particle swarm optimisation,photonic crystals,silicon,solar cells,si,design structures,light trapping designs,metallic diffractive grating structures,metallic layers,metallic materials,optical path length,particle swarm optimization,photonic crystal,reflective properties,scattering matrix methods,thin silicon solar cells,scattering matrix,optical scattering,absorption,diffraction grating,dielectrics

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