High efficiency, unprecedented stability Artist's view of the new perovskite triple-junction solar cell comprising different perovskite semiconductors with a novel bilayer of graphene oxide and a self-assembled monolayer as the hole conductor. (Courtesy: CC BY-SA/Laura Canil/HZB)"> High efficiency, unprecedented stability Artist's view of the new perovskite triple-junction solar cell comprising different perovskite semiconductors with a novel bilayer of graphene oxide and a self-assembled monolayer as the hole conductor. (Courtesy: CC BY-SA/Laura Canil/HZB)

Researchers at the Helmholtz-Zentrum Berlin ( HZB ) in Germany have overcome a long-standing barrier in next-generation photovoltaics by developing a new type of all-perovskite triple-junction solar cell.…