Changing how we make solar panels could reduce their carbon emissions
Changing the way we make solar panels could reduce their carbon footprint, providing a boost to green energy. Although solar panels are a source of renewable energy, making them has an environmental impact. Fengqi You at Cornell University in New York and his colleagues have analysed the overall environmental impact of two types of new solar panels, comparing these against panels made with crystalline silicon wafers – the current industry standard. The team found that a new type of solar panel made from two layers of a mineral called perovskite requires a smaller total energy input and results in fewer carbon emissions. The panel, called a perovskite-perovskite tandem, contains two layers of the material on top of each other, each optimised to absorb a section of the electromagnetic spectrum. Perovskite solar cells have only been around for the past decade, and perovskite-perovskite tandem cells are only a couple of years old and not...






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