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

Research output: Contribution to journalArticle

20 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

Fingerprint

Graphite
Spraying
Graphene
Titanium
Conversion efficiency
Kinetics
Electrons
Aerosols
Energy conversion
X ray photoelectron spectroscopy
Transmission electron microscopy
Scanning electron microscopy
Dye-sensitized solar cells
titanium dioxide
Electric potential

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

Graphene-titania films by supersonic kinetic spraying for enhanced performance of dye-sensitized solar cells. / Kim, Do Yeon; Joshi, Bhavana N.; Park, Jung Jae; Lee, Jong Gun; Cha, You Hong; Seong, Tae Yeon; In Noh, Suk; Ahn, Hyo Jin; Al-Deyabe, Salem S.; Yoon, Suk Goo.

In: Ceramics International, Vol. 40, No. 7 PART B, 01.01.2014, p. 11089-11097.

Research output: Contribution to journalArticle

Kim, DY, Joshi, BN, Park, JJ, Lee, JG, Cha, YH, Seong, TY, In Noh, S, Ahn, HJ, Al-Deyabe, SS & Yoon, SG 2014, 'Graphene-titania films by supersonic kinetic spraying for enhanced performance of dye-sensitized solar cells', Ceramics International, vol. 40, no. 7 PART B, pp. 11089-11097. https://doi.org/10.1016/j.ceramint.2014.03.131
Kim, Do Yeon ; Joshi, Bhavana N. ; Park, Jung Jae ; Lee, Jong Gun ; Cha, You Hong ; Seong, Tae Yeon ; In Noh, Suk ; Ahn, Hyo Jin ; Al-Deyabe, Salem S. ; Yoon, Suk Goo. / Graphene-titania films by supersonic kinetic spraying for enhanced performance of dye-sensitized solar cells. In: Ceramics International. 2014 ; Vol. 40, No. 7 PART B. pp. 11089-11097.
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