Tandem Silicon-Perovskite Solar Cells Could Provide Solar Power on the Cheap

By Dario Borghino, Gizmag – By combining silicon solar cells with their cheap and efficient perovskite-based counterparts, researchers at Stanford and MIT are creating a new type of “tandem cell” that could reach efficiencies up to 35 percent. Out of all the solar cell technologies discovered so far, perovskite certainly takes the cake as the fastest-growing and one of the most promising for the future. In just a few years of development, perovskite-based cells have gone from efficiencies in the low single digits to a respectable 20 percent. The more traditional silicon based single-junction cells are still in the lead on the efficiency front, but progress has slowed to a crawl as their output approaches the theoretical maximum. On the other hand, the quick pace at which perovskite cells are improving, together with cheap production costs and the fact they can even be sprayed onto windows and roofs, makes them a...

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