Journal
APPLIED PHYSICS LETTERS
Volume 101, Issue 7, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4745772
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Funding
- Center for Interface Science: Solar Electric Materials, an Energy Frontier Research Center
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001084]
- National Science Foundation [DMR-0120967]
- Office of Naval Research [N00014-1-1-0313]
- Deutsche Forschungsgemeinschaft (DFG)
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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. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4745772]
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