Incorporation of graphene into SnO2 photoanodes for dye-sensitized solar cells

Munkhbayar Batmunkh, Mahnaz Dadkhah, Cameron J. Shearer, Mark J. Biggs, Joseph G. Shapter

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

In dye-sensitized solar cell (DSSC) photoanodes, tin dioxide (SnO2) structures present a promising alternative semiconducting oxide to the conventional titania (TiO2), but they suffer from poor photovoltaic (PV) efficiency caused by insufficient dye adsorption and low energy value of the conduction band. A hybrid structure consisting of SnO2 and reduced graphene oxide (SnO2 -RGO) was synthesized via a microwave-assisted method and has been employed as a photoanode in DSSCs. Incorporation of RGO into the SnO2 photoanode enhanced the power conversion efficiency of DSSC device by 91.5%, as compared to the device assembled without RGO. This efficiency improvement can be attributed to increased dye loading, enhanced electron transfer and addition of suitable energy levels in the photoanode. Finally, the use of RGO addresses the major shortcoming of SnO2 when employed as a DSSC photoanode, namely poor dye adsorption and slow electron transfer rate.

Original languageEnglish
Pages (from-to)690-697
Number of pages8
JournalApplied Surface Science
Volume387
Early online date29 Jun 2016
DOIs
Publication statusPublished - 30 Nov 2016

Keywords

  • Dye-sensitized solar cells
  • Graphene
  • Photoanodes
  • Photovoltaic
  • Tin dioxide

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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  • Cite this

    Batmunkh, M., Dadkhah, M., Shearer, C. J., Biggs, M. J., & Shapter, J. G. (2016). Incorporation of graphene into SnO2 photoanodes for dye-sensitized solar cells. Applied Surface Science, 387, 690-697. https://doi.org/10.1016/j.apsusc.2016.06.146