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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,*
1 Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México (National Autonomous University of Mexico), Campus Juriquilla, Boulevard Juriquilla No. 3001, Juriquilla, Qro. C.P. 76230, Mexico 2 Centro de Investigación y de Estudios Avanzados del IPN, Unidad Querétaro, Apartado Postal 1-798, Querétaro, Querétaro C.P. 76001, Mexico
* Authors to whom correspondence should be addressed.
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 (CC BY 3.0).
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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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