Cheaper Materials Could Be Key To Low-cost Solar Cells

Solar cells today are made from expensive materials such as crystalline silicon or exotic thin films of rare elements like cadmium and tellurium. A new study finds that unconventional solar cell materials, such as iron pyrite -- fool's gold -- may be a better deal if photovoltaics are expected to meet energy demands of the future. These materials are more abundant and cheaper to extract, which can offset their somewhat lower efficiency.

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