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

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Batmunkh, Munkhbayar
Dadkhah, Mahnaz
Shearer, Cameron J
Biggs, Mark J
Shapter, Joseph G
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2016
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Abstract

In dye-sensitized solar cell (DSSC) photoanodes, tin dioxide (SnO 2 ) structures present a promising alternative semiconducting oxide to the conventional titania (TiO 2 ), 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 SnO 2 and reduced graphene oxide (SnO 2 -RGO) was synthesized via a microwave-assisted method and has been employed as a photoanode in DSSCs. Incorporation of RGO into the SnO 2 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 SnO 2 when employed as a DSSC photoanode, namely poor dye adsorption and slow electron transfer rate.

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Applied Surface Science

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387

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© 2016 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.

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Nanomaterials

Nanoelectronics

Science & Technology

Physical Sciences

Chemistry, Physical

Materials Science, Coatings & Films

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Batmunkh, M; Dadkhah, M; Shearer, CJ; Biggs, MJ; Shapter, JG, Incorporation of graphene into SnO2 photoanodes for dye-sensitized solar cells, Applied Surface Science, 2016, 387, pp. 690-697

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