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International Journal of Photoenergy
Volume 2017, Article ID 7284367, 6 pages
Research Article

Tandem Solar Cells Based on Cu2O and c-Si Subcells in Parallel Configuration: Numerical Simulation

1University POLITEHNICA of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
2Academy of Romanian Scientists, 54 Splaiul Independentei, 050094 Bucharest, Romania

Correspondence should be addressed to Valerică Ninulescu; moc.liamg@acirelav.ucselunin

Received 24 April 2017; Revised 16 June 2017; Accepted 6 July 2017; Published 8 August 2017

Academic Editor: Christin David

Copyright © 2017 Mihai Răzvan Mitroi 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.


A tandem solar cell consisting of a bottom c-Si high-efficiency subcell and a top low-cost Cu2O subcell in parallel configuration is evaluated for the first time by a use of an electrical model. A numerical simulation based on the single-diode model of the solar cell is performed. The numerical method determines both the model parameters and the parameters of the subcells and tandem from the maximization of output power. The simulations indicate a theoretical limit value of the tandem power conversion efficiency of 31.23% at 298 K. The influence of temperature on the maximum output power is analyzed. This tandem configuration allows a great potential for the development of a new generation of low-cost high-efficiency solar cells.