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In order to allow rain to produce electricity as well, the research team coated a solar cell with a whisper-thin film of graphene. Credit: Copyright Angewandte Chemie International Edition; courtesy of ResearchSEA

Many advances have made solar cells quite efficient and affordable but a disadvantage is that solar cells produce no power when it’s raining. This may change, however. Chinese researchers have now introduced a new approach for making an all-weather solar cell that is triggered by both sunlight and raindrops. They developed a highly efficient dye-sensitized solar cell. In order to allow rain to produce electricity as well, they coated this cell with a whisper-thin film of graphene.

Graphene can readily be prepared by the oxidation, exfoliation, and subsequent reduction of graphite...