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Scientists Create First-Ever Circuit Powered By Light

By robottf | February 5, 2010

Scientists Hold a new circuit that is powered by lightFor the first time, scientists have created a circuit that can power itself, as long as it’s left in a beam of sunshine. Created by scientists from the University of Pennsylvania, the world’s first photovoltaic circuit could eventually power a new line of consumer devices or even model the human brain.

Right now the creators can only coax minuscule amounts of electricity from their photovoltaic circuits, far too little to power consumer electrical devices, although those amounts could quickly skyrocket.  There are plenty of other ways they say that they can squeeze more electricity from light. Right now only about 10 percent of the photovoltaic circuits on a glass side work. Increasing that number will boost the power output.  Another way to get more power is by turning their 2D structures into 3D structures. Stacking multiple layers of light-collecting and electricity-using circuits would also boost power.

The photovoltaic circuit is a scientific breakthrough, not a technological one. These new circuits will most likely never replace their silicon counterparts.

Photovoltaic circuits could be ideal for other applications, however, such as powering tiny robotic devices or running computer calculations at the speed of light.  Far into the future, these circuits could even be used to set up as artificial neural networks that could model the brain.

At their most basic, computers represent data as on or off, a “0” or a “1.” Using light instead of electrons, these photovoltaic circuits could store data from, say, one, two, three or four. Each number would correspond to a certain wavelength or color of light — red, green, blue and yellow, for example. To model the human nervous system, each color of light could correspond to a different neurotransmitter, say red for dopamine and blue for serotonin.

The potential applications of the technology are huge, but will take years to develop into any kind of practical equipment.

www.news.discovery.com

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