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Nitrogen-Doped Graphene Foams as Metal-Free Counter Electrodes in High-Performance Dye-Sensitized Solar Cells

Authors

  • Dr. Yuhua Xue,

    1. Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, Wenzhou Medical College, 270 Xueyuan Xi Road, Wenzhou, Zhejiang 325027 (China)
    2. Center of Advanced Science and Engineering for Carbon (Case4Carbon), Department of Macromolecular Science and Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106 (USA)
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  • Dr. Jun Liu,

    1. Center of Advanced Science and Engineering for Carbon (Case4Carbon), Department of Macromolecular Science and Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106 (USA)
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  • Dr. Hao Chen,

    1. Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, Wenzhou Medical College, 270 Xueyuan Xi Road, Wenzhou, Zhejiang 325027 (China)
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  • Dr. Ruigang Wang,

    1. Department of Chemistry, Youngstown State University, One University Plaza, Youngstown, OH 44555 (USA)
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  • Dr. Dingqiang Li,

    1. Department of Chemistry, Youngstown State University, One University Plaza, Youngstown, OH 44555 (USA)
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  • Dr. Jia Qu,

    Corresponding author
    1. Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, Wenzhou Medical College, 270 Xueyuan Xi Road, Wenzhou, Zhejiang 325027 (China)
    • Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, Wenzhou Medical College, 270 Xueyuan Xi Road, Wenzhou, Zhejiang 325027 (China)
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  • Prof. Liming Dai

    Corresponding author
    1. Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, Wenzhou Medical College, 270 Xueyuan Xi Road, Wenzhou, Zhejiang 325027 (China)
    2. Center of Advanced Science and Engineering for Carbon (Case4Carbon), Department of Macromolecular Science and Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106 (USA)
    • Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, Wenzhou Medical College, 270 Xueyuan Xi Road, Wenzhou, Zhejiang 325027 (China)
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  • This work was supported financially by the AFOSR (grant numbers FA-9550-12-1-0069, FA 9550-10-1-0546, and FA9550-12-1-0037), DOD-Army (grant number W911NF-11-1-0209), US AFOSR-Korea NBIT, UNIST-WCU, NSFC-NSF (grant number DMR-1106160), Case Western Reserve University, Wenzhou Medical College, the Zhejiang Innovation Team from Department of Education (grant number T200917), the Ministry of Education of China (grant numbers IRT1077 and 211069), and the National “Thousand Talents Program” of China.

Abstract

original image

Efficient without metal: Nitrogen-doped graphene foams with a nitrogen content up to 7.6 % have been prepared and used as counter electrodes in dye-sensitized solar cells (DSSCs; see picture). The doping with nitrogen leads to a power conversion efficiency of 7.07 %. This is one of the highest values reported for DSSCs with carbon-based metal-free counter electrodes.

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