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I wonder if pehaps they might get sunburn!!!
Long-life solar cellsPolymer solar cells used to convert sunlight to electricity are degraded by ultraviolet light, which limits their lifespan.Yang Yang, a materials scientist at the University of California, Los Angeles, US, has a simple solution. He suggests coating the solar cell with a material that converts ultraviolet photons into ones of visible light.The new "photon conversion material" (PCM) converts harmful UV into longer wavelengths, enhancing efficiency of solar-energy conversion and reducing damage to cells. This should help the solar cells last longer, as well as increase their electrical yield.The PCM could be made of a liquid, a gel, nanoparticles or a solid, the researchers say. In experiments, they added the polymer blue polyfluorene to solar cells and found that it did indeed reduce the damage caused by UV light.