Annealing Effect on Efficiency of Aspilia Africana Flowers Dye Sensitized Solar Cells
International Journal of Sustainable and Green Energy
Volume 4, Issue 4, July 2015, Pages: 137-140
Received: Nov. 20, 2014;
Accepted: Nov. 30, 2014;
Published: Jun. 11, 2015
Views 4416 Downloads 119
Adenike Boyo, Department of physics, Lagos State University, Ojo, Lagos state, Nigeria
Henry Boyo, Department of Physics, University of Lagos, Lagos State, Nigeria
Olasunkanmi Kesinro, Department of physics, Lagos State University, Ojo, Lagos state, Nigeria
Energy was generated by using methanol as a solvent to extract dye from Aspilia africana Flowers. The maximum absorption of the extracted dye was observed at different wavelengths (350-1000nm). TiO2 was annealed at different temperatures and phytochemical screening was done. We observed insignificant presence of anthocyanin compared to flavonoids in the flowers. The solar energy conversion efficiency changes from 0.21% to 0.52%, due to the sintering of the TiO2 at different temperatures. The increase in solar energy conversion efficiency can be attributed to the changes in the morphology, crystalline quality, and the optical properties caused by the sintering effect.
Annealing Effect on Efficiency of Aspilia Africana Flowers Dye Sensitized Solar Cells, International Journal of Sustainable and Green Energy.
Vol. 4, No. 4,
2015, pp. 137-140.
B. O’Regan and M. Gr¨atzel, “A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films,” Nature, vol. 353, no. 6346, pp. 737–740, 1991.
Boyo A. O, Boyo H.O, Abudusalam I.T. and Adeola S. (2012). Dye Sensitized Nanocrystalline Titanium Solar cell using Laali Stem Bark (lawsonia inermis), Transnational Journal of Science and Technology Macedonia.
Cherepy, Nerine J., Smestad, Greg P.; Gratzel, Michael; Zhang, Jin Z. (1997). “ultrafast Electron Injection: Implications for a photoelectrochemical Cell Utilizing an Anthocyanin Dye – Sensitized TiO2 Nanocrystalline Electrode”. The Journal of Physical Chemistry B 101 (45): 9342 – 51.
F. A. de Castro, F.N¨uesch, C.Walder, and R.Hany, “Challenges found when patterning semiconducting polymers with electric fields for organic solar cell applications,” Journal of Nanomaterials, vol. 2012, Article ID 478296, 6 pages, 2012.
H. S. Chen, C. Su, J. L. Chen, T. Y. Yang, N. M. Hsu, and W. R. Li, “Preparation and characterization of pure rutile TiO2 nanoparticles for photocatalytic study and thin films for dye-sensitized solar cells,” Journal of Nanomaterials, vol. 2011, Article ID 869618, 8 pages, 2011.
How to build your own solar cell: A nanocrystalline dye-sensitized solar cell (http://www.solideas.com/solarcell/english.html)
Lapornik B., Prosek M., Wondra A.G., Food J., Eng. 2005, 71, 214
M. Gr¨atzel, “Photoelectrochemical cells,” Nature, vol. 414, no. 6861, pp. 338–344, 2001.
M. Yamaguchi, “Multi-junction solar cells and novel structures for solar cell applications,” Physica E, vol. 14, no. 1-2, pp. 84–90, 2002.
R.C. Weast (Ed.), Hand Book of Chemistry and Physics, 67th Edition, (CRC Press, Boca Raton, FL, 1986–1987, p. B-140).