CURRENT AFFAIRS

Detailed explanation-1: -Graphene’s high electronic conductivity, transparency and flexibility make them useful in heterojunction solar cells, where they can be employed in many different ways including electrodes (both anodes and cathodes), acceptor layers, donor layers, buffer layers and active layers.

Detailed explanation-2: -While there is a lot of promise, commercial development of graphene solar cells is still confined to academic labs or are not quite ready for trials, yet. There have been a few notable commercial developments over the last few years, however, which have led to graphene solar cells being used in real–world applications.

Detailed explanation-3: -The graphene-silicon solar cell is reportedly able to achieve a power conversion efficiency of 18.8%.

Detailed explanation-4: -Graphene extracts more electricity from the sun These theories were confirmed in the new experiments. They revealed that like silicon, graphene can extract several excited electrons from a single photon of sunlight – whereas other materials only get a single electron out of a photon.