System converts solar heat into usable light, increasing solar cell’s overall efficiency

“In operation, this approach would use a conventional solar-concentrating system, with lenses or mirrors that focus the sunlight, to maintain the high temperature. An additional component, an advanced optical filter, lets through all the desired wavelengths of light to the PV cell, while reflecting back any unwanted wavelengths, since even this advanced material is not perfect in limiting its emissions. The reflected wavelengths then get re-absorbed, helping to maintain the heat of the photonic crystal.”

http://m.phys.org/news/2016-05-solar-usable-cell-efficiency.html?utm_source=nwletter&utm_medium=email&utm_campaign=daily-nwletter

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