Issue Date: May 12, 2014
Lead-Free Perovskite Solar Cells
Solar power enthusiasts have been riding on a wave of recent reports describing increasingly impressive performance of perovskite-based solar cells. The devices, which feature light-absorbing organometal halide materials with the perovskite crystal structure, are promising because they are efficient at converting sunlight to electricity and are relatively inexpensive to make. But one shortcoming still hinders the field: Nearly every study focuses on lead-based perovskites. To address concerns of possible lead toxicity, Northwestern University researchers have . . .
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