A team of scientists based in South Korea has developed a method for the production of stable perovskite solar cells, using a fluorine based nano structure. The cells incorporate a structure which utilizes edged selectively fluorine functionalized graphene nano platelets, which fully covers the active perovskite layer, prevent the ingress of moisture which can quickly cause the cells to degrade.
Results published in the journal Nano Letters show that cells incorporating the fluorine nano platelets retained 82% of their initial efficiency after 30 days exposed to the air without encapsulation.
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Source: pv magazine