Fundamental limit of nanophotonic light trapping in solar cells
نویسندگان
چکیده
منابع مشابه
Fundamental limit of nanophotonic light trapping in solar cells
Establishing the fundamental limit of nanophotonic light-trapping schemes is of paramount importance and is becoming increasingly urgent for current solar cell research. The standard theory of light trapping demonstrated that absorption enhancement in a medium cannot exceed a factor of 4n2∕ sin2 θ, where n is the refractive index of the active layer, and θ is the angle of the emission cone in t...
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We use a rigorous electromagnetic approach to analyze the fundamental limit of light-trapping enhancement in grating structures. This limit can exceed the bulk limit of 4n², but has significant angular dependency. We explicitly show that 2D gratings provide more enhancement than 1D gratings. We also show the effects of the grating profile's symmetry on the absorption enhancement limit. Numerica...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2010
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.1008296107