%0 Journal Article %T Enhancing Efficiency of Perovskite Solar Cells via N‐doped Graphene: Crystal Modification and Surface Passivation %A Hadadian, Mahboobeh %A Juan-Pablo Correa-Baena %A Kafshdare Goharshadi, Elaheh %A Amita Ummadisingu %A Ji-Youn Seo %A Jingshan Luo %A Somayeh Gholipour %A Shaik M. Zakeeruddin %A Michael Saliba %A Antonio Abate %A Michael Grätzel %A Anders Hagfeldt %J Advanced Materials %@ 0935-9648 %D 2016