Journal of Electromagnetic Analysis and Applications, 2022, 14, 89-103 https://www.scirp.org/journal/jemaa ISSN Online: 1942-0749 ISSN Print: 1942-0730 DOI: 10.4236/jemaa.2022.148008 Aug. 31, 2022 89 Journal of Electromagnetic Analysis and Applications Diffusion Coefficient at Double Resonances in Frequency and Temperature, Applied to (n + /p/p + ) Silicon Solar Cell Base Thickness Optimization under Long Wavelength Illumination Gora Diop 1 , Ousmane Sow 2 , Moustapha Thiame 3 , Richard Mane 4 , Ibrahima Diatta 4 , Khady Loum 2 , Sega Gueye 4 , Mamadou Wade 1 , Gregoire Sissoko 4 1 Ecole Polytechnique de Thiès, Thiès, Senegal 2 Institut Universitaire de Technologie, Université Iba Der THIAM de Thiès, Thiès, Senegal 3 Université Assane SECK, Zinguinchor, Senegal 4 Groupe International de Recherche en Energie Renouvelable(GIRER), Dakar, Sénégal Abstract The diffusion coefficient of the minority charge carriers in the base of a silicon solar cell under temperature and subjected to a magnetic field, passes in re- sonance at temperature (T opt ). For this same magnetic field, the diffusion coef- ficient of the photogenerated carriers by a monochromatic light in frequency modulation enters into resonance, at the frequency (ω c ). Under this double resonance in temperature and frequency, the diffusion coefficient is used in the expression of the recombination velocity of the minority charge carriers on the back side of the base of the solar cell (n + /p/p + ), to obtain, by a graphi- cal method, the optimum thickness. A modeling of the results obtained shows a material saving (Si), in the development of the solar cell. Keywords Silicon Solar Cell-Diffusion Coefficient, Recombination Velocity, Absorption Coefficient, Magnetic Field-Temperature-Thickness 1. Introduction The control and optimization of the thickness of the different regions [1]-[10] that make up the solar cell is of great interest for the manufacture and commer- cial distribution of photovoltaic systems. How to cite this paper: Diop, G., Sow, O., Thiame, M., Mane, R., Diatta, I., Loum, K., Gueye, S., Wade, M. and Sissoko, G. (2022) Diffusion Coefficient at Double Resonances in Frequency and Temperature, Applied to (n + /p/p + ) Silicon Solar Cell Base Thickness Optimization under Long Wavelength Illu- mination. Journal of Electromagnetic Anal- ysis and Applications, 14, 89-103. https://doi.org/10.4236/jemaa.2022.148008 Received: July 17, 2022 Accepted: August 28, 2022 Published: August 31, 2022 Copyright © 2022 by author(s) and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY 4.0). http://creativecommons.org/licenses/by/4.0/ Open Access