@Article{CL.2025.227.637,
AUTHOR = {B. Yassine, B. Tahar, G. Fathi, B. Meriem, B. Ibtissem},
TITLE = {Modeling and optimization of a CZT(S,Se)-based tandem solar cell},
JOURNAL = {Chalcogenide Letters},
VOLUME = {22},
YEAR = {2025},
NUMBER = {7},
PAGES = {637--648},
URL = {http://www.techscience.com/CL/v22n7/64850},
ISSN = {1584-8663},
ABSTRACT = {In this paper, we designed a two-junction (tandem) solar cell model (tandem solar cell), 
consisting of an top and bottom subcell with absorber layers of Cu<sub>2</sub>SnZnS<sub>4</sub> (CZTS) and 
Cu<sub>2</sub>SnZnSe<sub>4</sub> (CZTSe) materials, respectively, for each subcell with a ZnS buffer layer and 
a ZnO window layer. This model was validated using the SCAPS-1D numerical 
simulation program. We also optimized the performance of the tandem cell as a whole 
using the simulation by studying the effect of the thickness of the absorber layer of the top 
subcell and the thickness of the absorber layer of the bottom subcell and its doping. The 
results of the study gave the optimal thickness value X<sub>CZTS</sub>=142,8nm for the top subcell 
absorber layer, the optimal thickness value X<sub>CZTSe</sub>=1µm for the bootom subcell absorber 
layer and its optimal doping value N<sub>A/CZTSe</sub>=10<sup>19</sup>
cm<sup>-3</sup>
 Tandem cell characteristics 
corresponding to these optimal values are open-circuit voltage V<sub>oc</sub>=1,4861V, short circuit 
current J<sub>sc</sub>=18,59mA/cm<sup>2</sup>
, fill factor FF=73.12% and efficiency ɳ=20,20%.},
DOI = {10.15251/CL.2025.227.637}
}