Imec, within the partnership of EnergyVille, announced a record result for its 4-terminal perovskite/silicon tandem photovoltaic cell. With a power conversion efficiency of 27.1%, the new imec tandem cell beats the most efficient stand-alone silicon solar cell. Further careful engineering of the perovskite material will bring efficiencies over 30% in reach.   Perovskite microcrystals are a promising material system to make high-performance thin-film solar cells. They can be processed into thin...