Emara, Jennifer Impact of Film Stoichiometry on the Ionization Energy and Electronic Structure of CH3 NH3 PbI3 Perovskites. [electronic resource] - Advanced materials (Deerfield Beach, Fla.) Jan 2016 - 553-9 p. digital Publication Type: Journal Article ISSN: 1521-4095 Standard No.: 10.1002/adma.201503406 doi