Imagine if your phone's screen or house window could double as a Solar panel. Michigan State University researchers have been working on transparent solar cells. They are called transparent luminescent solar concentrators (LSC). In them, small organic molecules absorb specific invisible wavelengths of light. Since they don't absorb visible light, they seem perfectly transparent to our eyes. The panels should get beyond 5% solar conversion efficiency when fully optimized. Only 10 minutes of sunlight could generate 100 minutes of standby time for a smartphone. Once this technology is commercialized, it will be freely available for an affordable price.