Graphene Nanoplatelets Doped with N at its Edges as Metal-Free Cathodes for Organic Dye-Sensitized Solar Cells
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- Graphene Nanoplatelets Doped with N at its Edges as Metal-Free Cathodes for Organic Dye-Sensitized Solar Cells
- Ju, Myung-Jong; Jeon, In-Yup; Kim, Jae Cheon; Lim, Kimin; Choi, Hyun-Jung; Jung, Sun-Min; Choi, In Taek; Eom, Yu Kyung; Kwon, Young Jin; Ko, Jaejung; Lee, Jae-Joon; Kim, Hwan Kyu; Baek, Jong-Beom
- Electrocatalysts; Electrode materials; Graphene; Nanoplatelets; Solar cells
- Issue Date
- WILEY-V C H VERLAG GMBH
- ADVANCED MATERIALS, v.26, no.19, pp.3055 - 3062
- 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.
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