Graphene-titania films by supersonic kinetic spraying for enhanced performance of dye-sensitized solar cells

Do Yeon Kim, Bhavana N. Joshi, Jung Jae Park, Jong Gun Lee, You Hong Cha, Tae Yeon Seong, Suk In Noh, Hyo Jin Ahn, Salem S. Al-Deyabe, Suk Goo Yoon

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23 Citations (Scopus)

Abstract

Graphene-titania films were fabricated by supersonic kinetic spray, known as aerosol deposition. Graphene concentration was varied to fabricate 0.1, 0.3, 0.5, 0.7, and 1.0 wt% G-TiO2 films for dye-sensitized solar cell (DSSC) application and to investigate the effect of graphene concentration on their energy conversion efficiency. The G-TiO2 films were characterized and analyzed based on results from SEM, XRD, XPS, TEM, and the current-voltage curve. The optimal concentration was 0.3 wt%, which decreased the recombination rate, favoring the formation of photogenerated electron-hole pairs. As a result, the conversion efficiency was 5.02% while that of the pure TiO2 was 3.14%. A clear trend per various concentrations was observed. At higher concentrations than 0.3 wt%, the conversion efficiency decreased owing to higher absorption of light by graphene present on the surface, thus reducing the generation of electron-hole pairs.

Original languageEnglish
Pages (from-to)11089-11097
Number of pages9
JournalCeramics International
Volume40
Issue number7 PART B
DOIs
Publication statusPublished - 2014 Jan 1

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Keywords

  • Aerosol deposition
  • Dye-sensitized solar cell
  • Graphene-titania
  • Supersonic kinetic spraying

ASJC Scopus subject areas

  • Ceramics and Composites
  • Process Chemistry and Technology
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Kim, D. Y., Joshi, B. N., Park, J. J., Lee, J. G., Cha, Y. H., Seong, T. Y., In Noh, S., Ahn, H. J., Al-Deyabe, S. S., & Yoon, S. G. (2014). Graphene-titania films by supersonic kinetic spraying for enhanced performance of dye-sensitized solar cells. Ceramics International, 40(7 PART B), 11089-11097. https://doi.org/10.1016/j.ceramint.2014.03.131