Berichtigung: Transferable Graphene Oxide by Stamping Nanotechnology: Electron‐Transport Layer for Efficient Bulk‐Heterojunction Solar Cells. (20th March 2013) - Wang, Dong Hwan; Kim, Jung Kyu; Seo, Jung Hwa; Park, Insun; Hong, Byung Hee; Park, Jong Hyeok; Heeger, Alan J.