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Perovskite solar cells (PSCs) have achieved high power conversion efficiency on the lab scale, rivaling the other commercialized photovoltaic technologies. However, stability issues have made it difficult for PSCs to achieve comparable or practical lifetimes in outdoor applications. Here, three different types of hot melt films (polyurethane, PU; polyolefin, POE; and ethylene vinyl acetate, EVA) together...
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