Printing Solar Cells
Silicon electronics are made in a method similar to developing a photograph. You have a certain material (a silicon substrate) that you layer with a chemical that reacts to UV light. You shine something like an overhead projection onto the chip and the silicon you want to keep stays while the parts you want gone dissolve. The process is fantastic for our ever-shrinking phones and electronic devices, but the substrate has to be very pure (down to the atom) which is hard to do for something the size of a window. It’s also a time and money consuming [...]
