Polyvinylpyrrolidone-modified indium tin oxide as an electron-collecting electrode for inverted polymer solar cells

J. W. Shim, H. Cheun, J. Meyer, C. Fuentes-Hernandez, A. Dindar, Y. H. Zhou, D. K. Hwang, A. Kahn, B. Kippelen

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25 Scopus citations

Abstract

We report on the photovoltaic properties of inverted polymer solar cells that use a polyvinylpyrrolidone (PVP) modified indium tin oxide (ITO) layer as the electron-collecting electrode. An ultrathin PVP layer, prepared by spin-coating, on top of ITO, was used to induce a reduction of its work function, allowing it to act as an electron-collecting electrode. Devices made on pristine ITO showed s-shape current-voltage characteristics, which were removed after exposure to ultraviolet radiation due to a reduction of the work function of ITO. Inverted solar cells with ITO/PVP electrodes yield efficiencies comparable to devices with ITO/ZnO electron-selective electrodes.

Original languageEnglish (US)
Article number073303
JournalApplied Physics Letters
Volume101
Issue number7
DOIs
StatePublished - Aug 13 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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