Perovskite Offers Shot at Cheaper Solar Energy
Rapid Gains in Efficiency Make This Class of Compounds a Potential Game Changer
A class of compounds first uncovered in the Ural Mountains more than a century ago is now a rock star in the world of solar-energy research.

Meet perovskite, the building block for materials that, as a group, have posted unprecedented gains in their solar-energy efficiency—the percentage of sunlight converted into electricity. In the lab, scientists experimenting with perovskite-based materials of different compositions have recently achieved a jump in efficiency to 20%, from around 10% just two years ago.

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