Skyscrapers could soon generate their own power thanks see through solar cells.
A series of recent results points to a solution, he says: Turn the windows into solar panels. In the past, materials scientists have embedded light-absorbing films in window glass. But such solar windows tend to have a reddish or brown tint that architects find unappealing. The new solar window technologies, however, absorb almost exclusively invisible ultraviolet (UV) or infrared light. That leaves the glass clear while blocking the UV and infrared radiation that normally leak through it, sometimes delivering unwanted heat. By cutting heat gain while generating power, the windows "have huge prospects," Wheeler says, including the possibility that a large office building could power itself.