Modeling of the Scattering Process and the Optical Photo-generation Rate of a Dye Sensitized Solar Cell: Influence of the TiO₂ Radius

E. H. O. Gueye¹, P. D. Tall¹, O. Sakho¹, C. B. Ndao¹, M. B. Gaye¹, N. M. Ndiaye¹, B. D. Ngom^1, and A.C. Beye¹

¹Groupe de physique du Solide et Sciences des Matériaux, Faculté des Sciences et Techniques Université Cheikh Anta Diop de Dakar (UCAD), B.P. 25114 Dakar-Fann Dakar (Sénégal)

Cite this paper:
E. H. O. Gueye, P. D. Tall, O. Sakho, C. B. Ndao, M. B. Gaye, N. M. Ndiaye, B. D. Ngom and A.C. Beye. Modeling of the Scattering Process and the Optical Photo-generation Rate of a Dye Sensitized Solar Cell: Influence of the TiO₂ Radius. American Journal of Nanomaterials. 2016; 4(3):58-62. doi: 10.12691/ajn-4-3-2

Abstract

We report on a methodology for optical and electrical modeling of dye-sensitized solar cells (DSSCs). In order to take into account the scattering process, the optical model is based on the determination of the effective permittivity of the mixture and the scattering coefficient using Mie and Bruggeman theories, considering spherical particles. Then, from the radiative transfer equation, the optical generation rate of cell is deduced. From the presented model, the dependence effects of the nanoparticles size upon the extinction coefficient and the optical generation rate are evidenced. Thus, we noticed that the extinction coefficient decreases with the increase of the TiO₂ nanoparticles and vanishes when the wavelengths increases in the visible spectrum. A significant uniformity of the absorption for radius smaller than 10 nm is observed, however at a radius about 80 nm, we observe a non-uniformity. The simulated results based on this model are in good agreement with the experimental results.

Keywords:
dye-sensitized solar cell mie theory scattering parameters

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