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International Journal of Photoenergy
Volume 2013, Article ID 480634, 6 pages
Research Article

Numerical Simulation of Luminescent Downshifting in Top Cell of Monolithic Tandem Solar Cells

1UDES, Solar Equipment Development Unit/EPST CDER, RN11 Bou-Ismail BP. 386, 42415 Tipaza, Algeria
2L.I.S Laboratory, Department of Electronic, Faculty of Technology, Ferhat Abbas University, 19000 Setif, Algeria

Received 20 May 2013; Revised 8 July 2013; Accepted 10 July 2013

Academic Editor: Gaetano Di Marco

Copyright © 2013 Mahfoud Abderrezek et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The increase in the conversion efficiency of monolithic tandem solar cells is limited by the short-circuit current density matching between the top and the bottom cells. Generally, the top cell presents the lowest current in the two subcells. In this paper, in order to increase the short-circuit current density in the top cell, we present a theoretical survey of the luminescence downshifting (LDS) approach for the design of monolithic tandem solar cells. The photovoltaic (PV) glass encapsulation material is replaced with a polymer material of polymethyl methacrylate (PMMA) type which is doped with diverse kinds of organic dyes. The performance of the n-p-p+ GaInP structure has been simulated as a function of the organic dyes. Gains achieved for the short-circuit current density and conversion efficiency are, respectively, 13.13% and 13.38%, under AM1.5G illumination spectra.