This has been attempted historically but yielded poor results. There wasn’t enough energy production and the materials were never fully transparent. Nobody want’s to sit in a building of colored glass.
“We take an approach where we actually make the luminescent active layer itself transparent.” The solar harvesting system uses small organic molecules developed by Lunt and his team to absorb specific nonvisible wavelengths of sunlight. “We can tune these materials to pick up just the ultraviolet and the near infrared wavelengths that then ‘glow’ at another wavelength in the infrared,” stated Richard Lunt of MSU’s College of Engineering. The glowing infrared light is guided to the edge of the plastic where it is converted to electricity by thin strips of photovoltaic solar cells.
“Because the materials do not absorb or emit light in the visible spectrum, they look exceptionally transparent to the human eye,” Lunt said. Clearly, this can open the doors to a whole new playing field for use on a mass scale on tall building or any kind of mobile device. Now we might be able to harvest solar energy without even knowing its there![google-translator]