ScienceDaily: Silicon wafers are the heart of solar cells. However, manufacturing them is not cheap. Over 50 percent of the pure silicon used is machined into dust. A new manufacturing technique developed by Fraunhofer researchers puts an end to these material losses, with raw material savings of 50 percent along with an 80 percent reduction in energy costs. They sparkle in dark blue on the rooftops. In our homes they give us illumination, while providing lamps, refrigerators and other household appliances with...