Eco Factor: Solar cells just 1 mm long can power small to extremely small machines.
Instead of simply spraying paint on your walls and roofs, now you can beautify them with an eco-sense. Researchers at the University of South Florida have developed solar cells so small that they can simply be sprayed on walls, roofs and any place which is exposed to the sun.
Each of these cells is just a millimeter long and is made from organic polymer that can be dissolved and printed on to a flexible material. The researchers fabricated an array of 20 such cells to produce nearly 8V of electricity, and used it to power tiny nanotube sensors used for sniffing dangerous chemicals and sensors.
The Dark Side:
Since the efficiency of solar cells depends on the amount of sunlight they received, you might just have to clean your solar painted walls and roofs a little more often.
Via: Tech Radar
