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Porous lens coating may make multijunction solar cells more economical

Multijunction solar cells are more efficient than commercial solar cells because they convert energy from the sun's infrared spectrum in addition to its visible light, but they are much more expensive. Penn State University researchers developed more economical plastic lenses that are coated with layers of a porous, anti-reflective material for use with multijunction cells, says Chris Giebink, co-author of a study on the process published in Nano Letters.

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