OPTIMIZING LEAD-FREE CsGeI3 PEROVSKITE SOLAR CELLS: SCAPS-1D SIMULATION ACHIEVING 27.34% EFFICIENCY THROUGH LAYER THICKNESS AND BAND ALIGNMENT TUNING. Kashf J. Multidiscip. Res. [Internet]. 2025 Sep. 26 [cited 2025 Dec. 15];2(09):241-5. Available from: https://kjmr.com.pk/kjmr/article/view/632