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Int. J. Mol. Sci. 2013, 14(2), 4081-4093; doi:10.3390/ijms14024081
Article

Stabilized Conversion Efficiency and Dye-Sensitized Solar Cells from Beta vulgaris Pigment

1,2,* , 1
,
1
 and
1,*
Received: 9 November 2012 / Revised: 11 January 2013 / Accepted: 17 January 2013 / Published: 18 February 2013
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Abstract

Dye-Sensitized Solar Cells (DSSCs), based on TiO2 and assembled using a dye from Beta vulgaris extract (BVE) with Tetraethylorthosilicate (TEOS), are reported. The dye BVE/TEOS increased its UV resistance, rendering an increase in the cell lifetime; the performance of these solar cells was compared to those prepared with BVE without TEOS. The efficiency η for the solar energy conversion was, for BVE and BVE/TEOS, of 0.89% ± 0.006% and 0.68% ± 0.006% with a current density Jsc of 2.71 ± 0.003 mA/cm2 and 2.08 ± 0.003 mA/cm2, respectively, using in both cases an irradiation of 100 mW/cm2 at 25 °C. The efficiency of the BVE solar cell dropped from 0.9 ± 0.006 to 0.85 ± 0.006 after 72 h of operation, whereas for the BVE/TEOS, the efficiency remained practically constant in the same period of time.
Keywords: dye-sensitized solar cell; betalaine; Tetraethylorthosilicate; solar energy; dip coating dye-sensitized solar cell; betalaine; Tetraethylorthosilicate; solar energy; dip coating
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Hernández-Martínez, A.R.; Estévez, M.; Vargas, S.; Rodríguez, R. Stabilized Conversion Efficiency and Dye-Sensitized Solar Cells from Beta vulgaris Pigment. Int. J. Mol. Sci. 2013, 14, 4081-4093.

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