SolarWindow Technologies, Inc. (WNDW)

[dog turd cannon]

There are numerous universities, USF, Michigan, etc that are working on either thin films or coatings for windows to generate electricity. None, are commercially viable, but in general there are no reasons why this couldn't be done in theory. It just means the window would no longer be translucent since the sun or ambient light would be absorbed. If you only absorb say 500-600 nm wavelength you get less power but you can still see out the window. Just everything would be the wrong tint.

The issue in all of this is getting the voltage off the window. Which is very hard since glass is a dielectric, so you need conduction somehow. It is plausible, though still science fiction, that you could build a window that has one layer that "stores" charge from the sun and a small band gap to another layer that is conductive sandwiched in glass.

Using thin films is a way to do the latter potentially. The best way to do this is use light piping though. Build a window that "tints" by directing some of the light laterally to a standard solar cell and allow the rest to pass... now... that I have given away a billion dollar idea feel free to use it. You can do this by select thin films with varying indexes of refraction to bend the light...