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Eric T. Hoke, I. T. Sachs-Quintana, Matthew T. Lloyd, Isaac Kauvar, William R. Mateker, Alexandre M. Nardes, Craig H. Peters, Nikos Kopidakis and Michael D. McGehee The Role of Electron Affinity in Determining Whether Fullerenes Catalyze or Inhibit Photooxidation of Polymers for Solar Cells Advanced Energy Materials 2

Article first published online: 21 MAY 2012 | DOI: 10.1002/aenm.201200169

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The photooxidation dynamics of polymer fullerene blends for solar cells is characterized for a variety of material combinations. Polymers photobleach faster when blended with smaller electron affinity fullerenes compared to those with larger electron affinities. This can be explained by a mechanism where photogenerated electrons generate the superoxide radical which degrades the polymer.

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