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Scientists at ALS Find New Path to More Efficient Organic Solar Cells Print
Monday, 07 January 2013 00:00

Harald Ade, a physicist at North Carolina State University, led a study at the Advanced Light Source that revealed a second pathway to improved performances of polymer/organic solar cells. Whereas the first pathway demands crystals of ultrapure domains, the new pathway shows that impure domains if sufficiently small can also lead to improved photovoltaic performances. Also working on this project were Brian Collins, Zhe Li, John Tumbleston, Eliot Gann and Christopher McNeill.

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Molecular view of polymer/fullerene solar film showing an interface between acceptor and donor domains. Red dots are PC71BM molecules and blue lines represent PTB7 chains. Excitons are shown as yellow dots, purple dots are electrons and green dots represent holes.