What's cooler than the latest in technology? How about the latest in self-powering technology? University of Pennsylvania researchers have put together what seems like the world's first photovoltaic circuit, which is to say that the electronic parts of your devices will no longer have to just consume energy, they'll be able to harvest it directly from the sun. The most obvious application for this would be in smartphone touchscreens, which could recharge themselves while you sip your latte at the local sun-drenched coffee shop. Of course, such practical uses are still a fair distance away, as the team can generate only minuscule amounts of power at present, but the theory is in place and so is our attention. Don't let us down, Penn!

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Photovoltaic circuit makes solar-powered touchscreens possible, not yet plausible