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Opt Express. 2012 Jul 2;20 Suppl 4:A545-53. doi: 10.1364/OE.20.00A545.

Simulation and analysis of the angular response of 1D dielectric nanophotonic light-trapping structures in thin-film photovoltaics.

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Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah 84112, USA.


Nanophotonics can guide the design of novel structures for light-trapping in ultra-thin photovoltaic cells. Here, we report on the systematic study of the effect of the angle of incidence of sunlight on the performance of such structures. We also conduct a parametric study of a sinusoidal grating and demonstrate that light intensity in the active region averaged over a range of input angles from 0° to 80° can be enhanced by more than 3 times compared to the bare device. Such a broadband light-trapping nanostructure can increase the total daily energy production of a fixed (non-tracking) device by over 60%, compared to a reference device with an anti-reflection coating.

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