Journal
CERAMICS INTERNATIONAL
Volume 40, Issue 7, Pages 11089-11097Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2014.03.131
Keywords
Graphene-titania; Dye-sensitized solar cell; Aerosol deposition; Supersonic kinetic spraying
Categories
Funding
- Human Resources Development program of KETEP [20124030200120]
- Industrial Strategic Technology Development Program [10045221]
- Deanship of Scientific Research at King Saud University [RGP-089]
- National Research Foundation of Korea [21A20131712520] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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