Comparative Indoor and Outdoor Degradation of Organic Photovoltaic Cells via Inter-laboratory Collaboration oleh Charles Owens, Gretta Mae Ferguson, Martin Hermenau, Eszter Voroshazi, Yulia Galagan, Birger Zimmermann, Roland Rösch, Dechan Angmo, Gerardo Teran-Escobar, Christian Uhrich, Ronn Andriessen, Harald Hoppe, Uli Würfel, Monica Lira-Cantu, Frederik C. Krebs, David M. Tanenbaum