World Journal of Condensed Matter Physics, 2018, 8, 185-196 http://www.scirp.org/journal/wjcmp ISSN Online: 2160-6927 ISSN Print: 2160-6919 DOI: 10.4236/wjcmp.2018.84013 Nov. 12, 2018 185 World Journal of Condensed Matter Physics Ac Recombination Velocity in a Lamella Silicon Solar Cell Matar Gueye 1 , Hawa Ly Diallo 1 , Attoumane Kosso Mamadou Moustapha 2 , Youssou Traore 1 , Ibrahima Diatta 1 , Gregoire Sissoko 1 1 Laboratory of Semiconductors and Solar Energy, Physics Department, Faculty of Science and Technology, University Cheikh Anta Diop, Dakar, Senegal 2 School of Mines and Geology, Niamey, Niger Abstract The silicon solar cell with series-connected vertical junction is studied with different lamella widths—the expression of the ac recombination velocity of the excess minority carrier at the back surface is established. Spectroscopy technique reveals dominated impact of the lamella widths of the base. Keywords Silicon Solar Cell-Vertical Junction Series, Ac Recombination Velocity, Lamella Width 1. Introduction The techniques of characterization of solar cell for quality control [1] [2] [3] improve the fabrication processes, go through experimental [4] and theoretical [5] studies in static [6] or dynamic transient [7] [8] [9] and frequency [10] [11] [12]. The phenomenological parameters [13], which allow this quality control, are the carrier recombination velocity: 1) in the bulk [14], defined by the diffusion length (L) and coefficient (D), lifetime (τ) of excess minority carrier. 2) on the surfaces [15] [16], i.e., recombination velocity (Sf) at the junction (n-p) [17] [18], (Sb) at the junction (p-p + ) [19] [20], and (Sg) at the grain boundaries in the 3-dimensional [21] [22] model. The solar cell is placed under different operating modes [23] and for different illuminations: monochromatic [24], polychromatic [25], constant multspectral How to cite this paper: Gueye, M., Diallo, H.L., Moustapha, A.K.M., Traore, Y., Diat- ta, I. and Sissoko, G. (2018) Ac Recombina- tion Velocity in a Lamella Silicon Solar Cell. World Journal of Condensed Matter Physics, 8, 185-196. https://doi.org/10.4236/wjcmp.2018.84013 Received: October 18, 2018 Accepted: November 9, 2018 Published: November 12, 2018 Copyright © 2018 by authors 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