Thought for the month

“To know yet to think that one does not know is best; Not to know yet to think that one knows will lead to difficulty.” Lao Tzu, philosopher (6th century BCE).

Wednesday, 9 May 2012

Better out than in

Single junction GaAs solar cells with conversion efficiencies above 28% have been reported. Perhaps counter-intuitively, these new designs specifically allow photons to be emitted. The group claims that by letting the internally generated luminescence photons to efficiently exit the device rather than be reabsorbed, increases the voltage created and thus the cell efficiency. Full results will be presented at CLEO 2012.

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