Black phosphorus is an exciting new material to study for it’s potential use in electronics. Take a look at this work unravelling the properties of black phosphorus.
Solar panels are expensive because of the high-purity silicon present in them. A new material called perovskite rivals the solar conversion efficiency of silicon, but at a fraction of the cost. There is however still a lot of fundamental understanding to be done on perovskites, which these researchers do by studying analogous structures.