title: Graphene nanoplatelets doped with N at its edges as metal-free cathodes for organic dye-sensitized solar cells.
abstract: Challenging precious Pt-based electrocatalysts for dye-sensitized solar cells (DSSCs), graphene nanoplatelets that are N-doped at the edges (NGnPs) are prepared via simply ball-milling graphite in the presence of nitrogen gas. DSSCs based on specific nanoplatelets designated "NGnP5" display superior photovoltaic performance (power conversion efficiency, 10.27%) compared to that of conventional Pt-based devices (9.96%). More importantly, the NGnP counter electrode exhibits outstanding electrochemical stability and electrocatalytic activity with a cobalt-complex redox couple.
authors.affiliation: Global GET-Future Laboratory & Department of Advanced Materials Chemistry, Korea University, 2511 Sejong-ro, Sejong, 339-700, Korea.
authors.forename: Myung Jong
authors.initials: MJ
authors.lastname: Ju
authors.forename: In-Yup
authors.initials: IY
authors.lastname: Jeon
authors.forename: Jae Cheon
authors.initials: JC
authors.lastname: Kim
authors.forename: Kimin
authors.initials: K
authors.lastname: Lim
authors.forename: Hyun-Jung
authors.initials: HJ
authors.lastname: Choi
authors.forename: Sun-Min
authors.initials: SM
authors.lastname: Jung
authors.forename: In Taek
authors.initials: IT
authors.lastname: Choi
authors.forename: Yu Kyung
authors.initials: YK
authors.lastname: Eom
authors.forename: Young Jin
authors.initials: YJ
authors.lastname: Kwon
authors.forename: Jaejung
authors.initials: J
authors.lastname: Ko
authors.forename: Jae-Joon
authors.initials: JJ
authors.lastname: Lee
authors.forename: Hwan Kyu
authors.initials: HK
authors.lastname: Kim
authors.forename: Jong-Beom
authors.initials: JB
authors.lastname: Baek
keywords: electrocatalysts; electrode materials; graphene; nanoplatelets; solar cells