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 E-Mail IMAGE: Scientists at SLAC National Accelerator Laboratory and Stanford University discovered that squeezing a promising lead halide material in a diamond anvil cell (left) produces a so-called black perovskite (right). view more  Credit: Greg Stewart/ SLAC National Accelerator Laboratory Among the materials known as perovskites, one of the most exciting is a material that can convert sunlight to electricity as efficiently as today s commercial silicon solar cells and has the potential for being much cheaper and easier to manufacture. There s just one problem: Of the four possible atomic configurations, or phases, this material can take, three are efficient but unstable at room temperature and in ordinary environments, and they quickly revert to the fourth phase, which is completely useless for solar applications.

United statesHemamala karunadasaThomas devereauxWendy maoChunjing jiaNature communicationsDepartment of energyStanford institute for materialsPhoton source at argonne national laboratoryLight source at lawrence berkeley national laboratoryEnergy sciencesOffice of scienceStanford universityNational energy research scientific computing centerNational accelerator laboratoryAccelerator laboratory