Carbon nanotube/graphene nanocomposite as efficient counter electrodes in dye-sensitized solar cells

Josef Velten, Attila J. Mozer, Dan Li, David Officer, Gordon Wallace, Ray Baughman, Anvar Zakhidov

Research output: Contribution to journalArticle

108 Citations (Scopus)

Abstract

We demonstrated the replacement of the Pt catalyst normally used in the counter electrode of a dye-sensitized solar cell (DSSC) by a nanocomposite of dry spun carbon multi-walled nanotube (MWNT) sheets with graphene flakes (Gr-F). The effectiveness of this counter electrode on the reduction of the triiodide in the iodide/triiodide redox (I -/I 3 -) redox reaction was studied in parallel with the use of the dry spun carbon MWNT sheets alone and graphene flakes used independent of each other. This nanocomposite deposited onto fluorinated tin-oxide-coated glass showed improved catalytic behavior and power conversion efficiency (7.55%) beyond the use of the MWNTs alone (6.62%) or graphene alone (4.65%) for the triiodide reduction reaction in DSSC. We also compare the use of the carbon MWNT/Gr-F composite counter electrode with a DSSC using the standard Pt counter electrode (8.8%). The details of increased performance of graphene/MWNT composite electrodes as studied are discussed in terms of increased catalytic activity permitted by sharp atomic edges that arise from the structure of graphene flakes or the defect sites in the carbon MWNT and increased electrical conductivity between the carbon MWNT bundles by the graphene flakes.

Original languageEnglish (US)
Article number085201
JournalNanotechnology
Volume23
Issue number8
DOIs
StatePublished - Mar 2 2012

Fingerprint

Carbon Nanotubes
Graphite
Graphene
Carbon nanotubes
Nanocomposites
Nanotubes
Electrodes
Carbon
Redox reactions
Composite materials
Iodides
Dye-sensitized solar cells
Tin oxides
Conversion efficiency
Catalyst activity
Glass
Defects
Catalysts

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

Velten, J., Mozer, A. J., Li, D., Officer, D., Wallace, G., Baughman, R., & Zakhidov, A. (2012). Carbon nanotube/graphene nanocomposite as efficient counter electrodes in dye-sensitized solar cells. Nanotechnology, 23(8), [085201]. https://doi.org/10.1088/0957-4484/23/8/085201

Carbon nanotube/graphene nanocomposite as efficient counter electrodes in dye-sensitized solar cells. / Velten, Josef; Mozer, Attila J.; Li, Dan; Officer, David; Wallace, Gordon; Baughman, Ray; Zakhidov, Anvar.

In: Nanotechnology, Vol. 23, No. 8, 085201, 02.03.2012.

Research output: Contribution to journalArticle

Velten, J, Mozer, AJ, Li, D, Officer, D, Wallace, G, Baughman, R & Zakhidov, A 2012, 'Carbon nanotube/graphene nanocomposite as efficient counter electrodes in dye-sensitized solar cells', Nanotechnology, vol. 23, no. 8, 085201. https://doi.org/10.1088/0957-4484/23/8/085201
Velten, Josef ; Mozer, Attila J. ; Li, Dan ; Officer, David ; Wallace, Gordon ; Baughman, Ray ; Zakhidov, Anvar. / Carbon nanotube/graphene nanocomposite as efficient counter electrodes in dye-sensitized solar cells. In: Nanotechnology. 2012 ; Vol. 23, No. 8.
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