It could be used to create solar cells that absorb 100% of the light that reaches it, thus creating extremely efficient solar cells.
Right now, if you covered 4% of Sahara with solar cells, it would produce enough electricity to supply the entire world. With this technology, you could likely do the same with less than 1% of Sahara.
You could built it on the roof of a house to give you all the energy you need during the day, while either taking from the public net during the night, or have a storage unit for electricity during the night.
If they can modify it to work in normal sun light, it is the largest breakthrough for green electricity ever.
Additionally, if they ever could convert it to work with other things such as alpha, beta and gamma rays, or various other things, that is another huge scientific breakthrough. If they can somehow make it work with cosmic radiation, which is one of the largest obstacles in space travels, that is one of the largest breakthroughs ever, as not only does it provide them with pretty much an everlasting source of power (as cosmic radiation is everywhere), it makes space travels a lot safer, and could allow us to set up relatively safe base on Mars and the moon, as Cosmic Radiation is one of the largest obstacles for this.
Although now I probably have a bit too high hopes for this <.<;
