%0 Journal Article
%T Numerical Simulation of Tandem Using ZnS as a Buffer Layer Cu I<sub>(1-<i>x</i>) </sub>Ca<sub><i>x</i></sub>Se<sub>2</sub>/CuGaSe<sub>2</sub>
%A Donafologo Soro
%A S¨¦kou Toure
%A Adama Sylla
%A Amal Bouich
%A J¨˛lia Mari-Guaita
%A Siaka Toure
%A Bernab¨¦ Mari Soucase
%J Modeling and Numerical Simulation of Material Science
%P 1-10
%@ 2164-5353
%D 2023
%I Scientific Research Publishing
%R 10.4236/mnsms.2023.131001
%X In the global context of diversification of usable energy sources, the use of renewable energies, in particular solar photovoltaic energy, is becoming increasingly important. As such, the development of a new generation of photovoltaic cells based on the CIGS material is promising. Indeed, the efficiency of these cells has exceeded 20% in recent years. Thus, our work consists in the modeling of a tandem solar cell based on Cu(In,Ga)Se<sub>2</sub> (CGS/CIGS). The goal is to optimize its physical and geometrical parameters in order to obtain a better photovoltaic conversion efficiency compared to other research works on tandem in the past. We used AMPS-1D software for the simulation. When we realize the tandem, the least efficient cell (CGS) imposes the current and the shape of the J-V characteristic of the tandem. We obtained a theoretical efficiency of 39.30% which is significantly higher than the efficiencies obtained in the past by other researchers with a short circuit current of 34.60 mA/cm<sup>2</sup>, an open circuit voltage of 1.74 V and a form factor of 65.20%. The simulation also showed that the high defect density in the material strongly impacts the performance of the tandem.
%K Photovoltaic Energy
%K Simulation
%K AMPS-1D
%K Tandem Solar Cell
%K Efficiency
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=124744