High efficiency graphene solar cells

Graphene Graphene is a sheet of carbon atoms arranged in a honeycomb-like lattice just one atom thick, having a number of unique electronic and mechanical properties. This is because of the fact that electrons whiz through graphene at extremely high speeds, behaving like "Dirac" particles with little resistance. Graphene is also transparent to light due to its Dirac electrons and can absorb light of any color. Solar cells Researchers so far have made solar cells from graphene but the power conversion efficiency is quite low at around 1.9%. But researchers at the University of Florida in Gainesville have succeeded in fabricating the most efficient graphene-based solar cells ever by adding an organic dopant to the graphene layer in the devices. The power conversion efficiency of the new solar cells reaches nearly 9%, compared to just fewer than 2% for cells that use undoped graphene. Structure These cells are made of graphene sheet doped with the organic compound (trifluorometh