We are always in the search alternative sources of energy, mostly from renewable resources. In practice, that usually translates to solar and wind power, mostly the former. But while the sun is almost always available, at least during the day, it can sometimes be hidden for hours under a torrent of rain. To get past at least that situation, a group of researchers from the Ocean University of China and Yunnan Normal University are developing a new time of solar cell that can generate electricity even without the sun. At least as long as there is rain.