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Zhi-Kuang Tan, Kerr Johnson, Yana Vaynzof, Artem A. Bakulin, Lay-Lay Chua, Peter K. H. Ho and Richard H. Friend Suppressing Recombination in Polymer Photovoltaic Devices via Energy-Level Cascades Advanced Materials 25

Article first published online: 12 JUN 2013 | DOI: 10.1002/adma.201300243

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An energy cascading structure is designed in a polymer photovoltaic device to suppress recombination and improve quantum yields. By the insertion of a thin polymer interlayer with intermediate energy levels, electrons and holes can effectively shuttle away from each other while being spatially separated from recombination. An increase in open-circuit voltage and short-circuit current are observed in modified devices.

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