Solar Cell Efficiency and the “Black Hole for Light”

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Researchers at Princeton University led by electrical engineer Stephen Chou, have developed what is being called a “nanostructure sandwich” to trap light and improve the efficiency of organic solar cells by 175%. A layer of metal mesh 30 nanometers thick (A nanometer is about one hundred-thousandth the width of human hair) is placed on top of layers of plastic materials, titanium oxide, and aluminum. Chou says the mesh acts like a “black hole”...

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