Amorphous silicon solar cells lose their efficiency during the first hours of sunlight exposure, because of the phenomenon called the Staebler-Wronski effect, which has not yet been fully explained by science. After several hours of sunlight, these types of solar cells lose about a third of their efficiency, from 10 to 7 percent.

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According to the researchers, in the future, our refrigerators could use magnets to keep the food cold. Besides the fact that one such refrigerator uses less power and runs quieter than a conventional fridge, it wouldn’t contain any hydrofluorocarbons (HCF), gases that contribute to the greenhouse effect.

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