Graphene nanoplatelets doped with N at its edges as metal-free cathodes for organic dye-sensitized solar cells

Myung Jong Ju, In Yup Jeon, Jae Cheon Kim, Kimin Lim, Hyun Jung Choi, Sun Min Jung, In Taek Choi, Yu Kyung Eom, Young Jin Kwon, Jaejung Ko, Jae Joon Lee, Hwan Kyu Kim, Jong Beom Baek

Research output: Contribution to journalArticlepeer-review

135 Scopus citations

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.

Original languageEnglish
Pages (from-to)3055-3062
Number of pages8
JournalAdvanced Materials
Volume26
Issue number19
DOIs
StatePublished - 21 May 2014

Keywords

  • electrocatalysts
  • electrode materials
  • graphene
  • nanoplatelets
  • solar cells

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