Nanostructured substrates are promising for light trapping in photovoltaic devices because they have the potential to manage and direct light absorption. This talk will describe how different types of nano-textured plasmonic substrates can result in broadband absorption over the visible and near-infrared range. Using soft nanolithography, we have generated subwavelength patterns with moir� patterns and arbitrary 2D Bravais lattices. Controlling the plasmonic crystal lattice symmetry can result in degenerate conditions being lifted and more plasmon bands being excited within a fixed wavelength range. The use of such substrates as patterned plasmonic back reflectors will be discussed.

Towards omnidirectional plasmonic substrates for light trapping

243rd National Meeting (2012)

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