They just set two certified world records.
A collaborative effort led by EPFL’s Photovoltaics and Thin Film Electronics Laboratory in partnership with the famous innovation center, CSEM, has smashed through the efficiency record for tandem silicon-perovskite solar cells.
This is significant as the researchers have surpassed the milestone of 30 percent for the first time using low-cost materials and established two certified world records, pushing the technology beyond the limits of silicon. "We have passed a psychological barrier," explains Christophe Ballif, Head of the EPFL Photovoltaics Laboratory and CSEM’s Sustainable Energy Center,."We have validated experimentally the high-efficiency potential of perovskite-on-silicon tandems. The 30 percent efficiency mark had already been achieved with other types of materials, namely III-V semiconductors.
"Our results are the first to show that the 30 percent barrier can be overcome using low-cost materials and processes, which should open new perspectives for the future of PV," he continued.Solar cells are bound to the limits of whatever material they were made from. Today, silicon is the most widely used material for solar cells; however, despite its success, it does have its drawbacks as it has a theoretical efficiency limit of roughly 29 percent.
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