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Kyung-Geun Lim, Mi-Ri Choi, Ji-Hoon Kim, Dong Hun Kim, Gwan Ho Jung, Prof. Yongsup Park, Prof. Jong-Lam Lee and Prof. Tae-Woo Lee Role of Ultrathin Metal Fluoride Layer in Organic Photovoltaic Cells: Mechanism of Efficiency and Lifetime Enhancement ChemSusChem 7

Article first published online: 25 FEB 2014 | DOI: 10.1002/cssc.201301152

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Layer by layer: We elucidate how an ultrathin barium fluoride (BaF2) layer on the electron extraction contact affects the power conversion efficiency and lifetime of OPV devices. The open-circuit voltage increment observed in these devices was caused primarily by the lowered effective work function of the cathode caused by large dipole moment of thin BaF2 films.

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