Materials breakthrough could lead to cheaper, better solar panels

To improve the efficiency of solar panels, scientists have become increasingly intrigued by perovskites, an evasive natural mineral with a unique crystalline structure. Unfortunately, the mineral has proved to be uncooperative. At room temperature, three of its four possible atomic configurations are unstable and the material quickly reverts to its fourth phase, which renders it useless in the effort to convert sunlight to electricity.
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