Rain is not very beneficial for solar production. Power generation from photovoltaic cells dramatically reduces its efficiency on rainy days, but that is about to change as a group of Chinese scientists, led by Qunwei Tang, are developing a solar cell with graphene capable of generating energy. with raindrops.

The new solar cell, which carries an atom-thick layer of graphene, is capable of obtaining renewable energy from the raindrops, a big step forward given that in the rainiest countries the performance drops considerably due to this meteorological phenomenon.

They could generate electricity on sunny and rainy days. To achieve this, they added a very thin layer of graphene as a coating for the solar panels. Graphene is a material which is a very good conductor of electricity, it only needs a layer one atom thick so that a large number of electrons can move on its surface. When it rains, the Lewis acid-base reaction takes place, which allows the generation of energy.

Graphene solar cell

In the design and experimentation phase, its efficiency still needs to be improved, the performance of which is currently around 6.5%, far from the 22% of most current solar panels.

There is no price yet for this new technology, but it is already under discussion Journal of Angewandte Chemie, as shown in sciencenewsjournal.