Improved Solar Cells with Light Trapping Nano Holes

December 11, 2012 · Print This Article

Another development to improve the efficiency of solar panels has been announced by researchers from Princeton University led by professor Stephen Chou. By using a nanostructured “sandwich” of metal and plastic, the efficiency of thin film solar collectors was improved by 175 percent.

The nanoscale lattice on top of the sandwich is able to trap light with openings called a “plasmonic cavity with subwavelength gap array” or PlaCSH. The layer is

made of gold and is only 30 nanometers thick. Each gap is 175 nanometers in diameter and spaced 25 nanometers apart. The opening is smaller than the wavelength of light, which traps it rather than allowing it to reflect off the collector, which leads to improved conversion of light to electricity.

The mesh layer plus replaces the indium-tin-oxide (ITO) layer which is typically on top of thin-film solar cells, which is […]

[Source] Cynthia


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