Scientists have shown that wrinkles and folds can be used to maximize the absorption of low-energy photons by efficiently redirecting them into a thin absorbing film. This inexpensive technique for structuring photonic substrates could be used to increase the efficiency of many organic photovoltaic cells.
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Gregg, B., van de Lagemaat, J. Folding photons. Nature Photon 6, 278–280 (2012). https://doi.org/10.1038/nphoton.2012.84
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DOI: https://doi.org/10.1038/nphoton.2012.84
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