MIT researchers have announced that they have created “organic solar concentrators” that could make windows become powerful solar panels in as little as three years.

The concentrator is mixture of two or more dyes painted onto a pane of glass or plastic. The dyes absorb light across a range of wavelengths, re-emit it at a different wavelength and transport it across the pane to the solar cells at the edges. Focusing the light like this increases the electrical power generated by each solar cell by a factor of 40.