Modeling and Bandgap Optimization of Multijunction Solar Cells for High-Efficiency Photovoltaic Performance Muhammad Aliff Hafeez Bin Azman, Sim Yi Sy Yi, Kah Haw Law, Mohd Abdul Talib Mat Yusoh, Md Nor Ramdon Bin Baharom, Alvin John Lim Meng Siang, Nur Sabrina Binti Azli Murzami, Khalid Aboubakr Hasan Mousay, 10.57647/j.mjee.2025.17740 XML Requires Subscription PDF downloads: 211