AUTHOR=Salem Ahmed Fathi , Hameed Mohamed Farhat. O. , Abdelhamid Hamdy , El-Rabaie Sanaa M. , Obayya S. S. A. , El-Bashar R. 
  
TITLE=Dome-shaped nanostructured wide-bandgap perovskite for tandem solar cell applications
  
JOURNAL=Frontiers in Physics
  
VOLUME=Volume 13 - 2025
  
YEAR=2026
  
URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2025.1754822
  
DOI=10.3389/fphy.2025.1754822
  
ISSN=2296-424X
  
ABSTRACT=The development of wide-bandgap perovskite materials has enabled new opportunities for highly efficient tandem solar cell applications. In this study, the optical and electronic performance of a single junction dome-shaped nanostructured wide-bandgap perovskite (MA0.9Cs0.1Pb(I0.6Br0.4)3) is studied for all-perovskite tandem solar cell (SC) applications. The optical performance of the proposed design is studied using finite difference time domain. The introduction of the dome-shaped (Al2O3) antireflective layer improves the light absorption to 90.1% relative to 77.1% for the PSC without antireflective coating (ARC). Therefore, the maximum power conversion efficiency (PCE) of 15.3% is reported for the optimized structure (Eg = 1.82 eV) with an enhancement of 19.5% compared to the reference cell. When the defect density is increased to 1018 cm-3, the PCE is dropped to 7.7% with a reduction of 49.7% relative to the studied good practical defect density of 1015 cm-3. Furthermore, the impact of the perovskite bandgap on the electrical parameters of the perovskite solar cells (PSCs) device is analyzed. The optimized structure with a bandgap of 1.9 eV shows the highest PCE of 16.1% with a JSC of 18.1 mA/cm2. The results show that the presence of Al2O3 ARC enhances the performance of PSC, which can be useful for tuning wide-bandgap perovskite in tandem photovoltaic systems.