Miles Barr: Every Window Can Be a Solar Cell

Solar panels are usually bulky, opaque, reflective rectangles. Barr, the CEO of Ubiquitous Energy, is reducing solar cells to a thin, transparent film that, when applied to any piece of glass or plastic, absorbs light and converts it to electricity. The first prototypes are for mobile gadgets, but the larger potential is clear: Once perfected, the film could coat entire skyscrapers to offset energy use.