In Brief The flexible photovoltaics, made by researchers in South Korea, could power wearable electronics. It is thin enough to wrap around a pencil but is as efficient and durable as the existing thicker ones. Engineers from South Korea developed very thin, flexible solar cells that can wrap around an average pencil. The photovoltaic cell they created is 1 micrometer thick, or just about a millionth of a meter. The engineers from the Gwangju Institute of Science and Technology in South Korea used the semiconductor gallium arsenide. They directly stamped the cells into a flexible substrate without addition of any adhesive.
Tests show that it is as efficient as thicker solar cells and that it could wrap around objects with radii up to 1.4 millimeters small, and are comparably less fragile.