Solar panels have gotten thinner than a human hair. Soon they’ll be everywhere.

Solar cells this small could be integrated into anything — and soon they will be. One of the reasons I think solar photovoltaic power is going to take over the world is that it is scalable in a way no other power source can be. It can be used to build multi-hundred-megawatt power plants, or it can be scaled down. Way down. How far down? Try less than the width of a human hair.

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