The Lawrence Berkeley National Laboratory has released the results of a study that found a number of cost-effective, naturally abundant materials that could be used instead of crystalline silicon in solar cells.

Iron sulfide and copper sulfide were clear winners in terms of cost and abundance, according to the report.

Current solar technology costs about $7 to $8 per watt, Wadia said. He said the new materials could potentially cut costs by “two orders of magnitude.”

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