This feat usually relies on massive panels installed on roofs or ground-based structures that are cumbersome, expensive, and not renter-friendly at all. Scientists out of China's Nanjing University have developed a coating for windows that harnesses solar energy while still allowing a clear, color-true view through the glass. The name for this type of solar energy harness is a "colorless and unidirectional diffractive-type solar concentrator" (CUSC), per Science Alert. The team out of Nanjing has succeeded in building a working model of this solar energy capture device that outperforms earlier attempts with slightly different methods. That might seem like small potatoes, but once it's sized up to fit a window, the potential electricity generated is definitely worth pursuing.