Elbar, MouradTobbeche, SouadChala, SlimaneSaidani, OkbaKateb, Mohamed NadjibSerdouk, Mohamed Redha2023-04-272023-04-272023https://jnep.sumdu.edu.ua/download/numbers/2023/1/articles/jnep_15_1_01020.pdfhttps://dspace.univ-boumerdes.dz/handle/123456789/11395The CGS and CIGS being promising materials for large scale photovoltaic applications, the effect of temperature on the electrical parameters of a CGS/CIGS tandem solar cell has been investigated in this work. The copper gallium diselenide (CGS) and copper indium gallium diselenide (CIGS) structures as topcell and bottom-cell respectively, were numerically simulated under AM1.5G spectral illumination using the two-dimensional device simulator Silvaco-Atlas. The temperature dependency of the solar cell’s characteristics was investigated in the temperature range from 300 to 400 K at intervals of 20 K. The simulation results show the density current (Jsc) slightly increases whereas the open-circuit voltage (Voc) and fill factor (FF), conversion efficiency () decreases with the increase in temperature. The tandem cell operating temperature efficiency was found to be (– 0.34 %/K), which is slightly higher than that of CGS solar cell (– 0.29 %/K), but markedly better than that of CIGS solar cell (– 0.41 %/K)enNumerical simulationSilvaco-AtlasTemperatureCGS/CIGS Tandem cellMatching currentArticle