MIT researchers developed transparent solar cells that absorb infrared and ultraviolet light while letting visible light pass through, meaning they could be installed on windows and phone screens without changing how they look. Computer modeling suggests windows coated with these cells in a tall office building could provide 25% or more of the building's total electricity needs. This is legitimate institutional research from MIT's Energy Initiative—not a prototype concept but validated technical advancement that's being studied for real-world deployment on building envelopes.