Solar energy harvesting through biomimicking the wings of a butterfly
Scientists are looking very close at butterfly wings. The nano structure of the colored scales could advance solar power technology.
Using these structures as antireflective patterns will help sunlight harvesting on Si based photovoltaics. Computer simulated results showed that after placing these nanostructures on Si solar panels, surface backscattering decreased substantially. The scale structure of Ornithoptera priamus gave the best antireflection. Light reflection decreased from more than 35% on bare Si panel down to less than 5%. As a result, the short-circuit current, i.e. the largest current that can be obtained from the photovoltaic cell, was increased by 66%.
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