Recently, the scientists at the U.S. Naval Research Laboratory have developed functioning underwater solar cells. With the help of the sunlight, which is absorbed in water, these solar cells can be powered. The blue-green light is the one most absorbed by the sea water and goes very deep inside the sea. The traditional topside silicon solar cells are designed with full solar spectrum which allows them to work underwater very easily.

The most efficient at this are GalnP (gallium indium phosphide) which convert light within the less intense blue-green wavelength into electricity.  Further research is still being conducted by the U.S. Naval Research Laboratory. However, electricity generation through underwater sunlight can really be helpful as so far, solar cells have only be used as electronic sensors on dry lands. This would be a first to have them perform the same underwater.

There are some solar cells that have been developed which work underwater but depend on batteries. But without batteries would be the first successful performance. There is much that could be done with sunlight, and not just the sunlight that falls on dry land, but also the rays that go inside the water. There is so much sunlight which is wasted in this way. Mostly the aquatic animals do not need sunlight for their living as they are akin to their water surroundings.