Imagine a day when - rather than being spewed into the atmosphere - the gases coming from power plants are instead captured and fed into catalytic reactors that chemically transform greenhouse gases like carbon dioxide into industrial fuels or chemicals that emit only oxygen. It's a future that Rowland Fellow Haotian Wang says may be closer than many realize. 

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Perovskite materials have the potential to be great LEDs, as very efficient red and green devices have been developed. Yet in order to be used in applications such as TVs and phones, blue LEDs are also required, and these have lagged far behind. Researchers in the Congreve Lab have figured out a surprising way to fix these materials: by adding a dopant, their brightness and efficiency counter-intuitively increase, leading to the highest efficiency blue...