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Kirill Zilberberg, Sara Trost, Hans Schmidt and Thomas Riedl Solution Processed Vanadium Pentoxide as Charge Extraction Layer for Organic Solar Cells Advanced Energy Materials 1

Article first published online: 6 APR 2011 | DOI: 10.1002/aenm.201100076

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Solution processed V2O5 films prepared via a sol-gel technique are used to replace PEDOT:PSS as hole extraction interlayers in polymer:fullerene solar cells. A high work function of 5.6 eV is found for the V2O5 layers without any post-processing (annealing or plasma treatment). A power conversion efficiency (PCE) of 3%, comparable to reference devices using PEDOT:PSS is verified. Concomitantly, a substantial improvement in device stability is demonstrated.

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